Journal of Microbiology

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Prebiotic potential of proso millet and quinoa: Effects on gut microbiota composition and functional metabolic pathways: Jinwoo Kim, Jiwoon Kim, Yewon Jung, Gyungcheon Kim, Seongok Kim, Hakdong Shin; J. Microbiol. 2025;63(7):e2503002. Published online July 31, 2025; DOI: https://doi.org/10.71150/jm.2503002

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Abstract PDF Supplementary Material: Prebiotics are indigestible dietary components that improve host health by stimulating the growth and metabolic activity of beneficial intestinal microbes. The whole grains are rich in non-digestible carbohydrates, which may confer prebiotic potential. Among them, millet and quinoa have gained attention as dietary alternatives due to the growing popularity of gluten-free diets. In this study, we examined the effects of proso millet and quinoa on the human gut microbiota using an in vitro fecal incubation model. Both grains altered alpha diversity metrics, including microbial richness, evenness, and phylogenetic diversity. Beta diversity analysis showed that the proso millet and quinoa treatment groups exhibited distinct clustering patterns compared to the control, highlighting their impact on microbial community structure. Taxonomic analysis showed an increase in beneficial genera, including Bifidobacterium, and a decrease in taxa such as Enterobacteriaceae and Flavonifractor. To assess metabolic changes associated with microbial fermentation, short-chain fatty acid (SCFA) intensities were measured. The intensities of acetic acid, propionic acid, and butyric acid were significantly higher in the proso millet- and quinoa-treated groups compared to the control group. Spearman correlation analysis showed that the abundances of Bifidobacterium and Blautia were significantly positively associated with SCFA intensities. Furthermore, predicted functional pathway analysis identified enrichment of carbohydrate-related pathways in proso millet and quinoa treatments. Quinoa supplementation led to a broader enhancement of metabolic pathways, including glycolysis/gluconeogenesis, starch and sucrose metabolism, and pentose phosphate pathways, whereas proso millet enriched galactose metabolism, and starch and sucrose metabolism. These findings suggest that proso millet and quinoa influence gut microbial diversity, composition, and function.

Bacteroides celer sp. nov. and Bacteroides mucinivorans sp. nov., isolated from human feces, and the reclassification of Bacteroides koreensis Shin et al. 2017 and Bacteroides kribbi Shin et al. 2017 as later heterotypic synonyms of Bacteroides ovatus Eggerth and Gagnon 1933 (Approved Lists 1980): Ah-In Yang, Bora Kim, Woorim Kang, Hae-In Joe, Na-Ri Shin; J. Microbiol. 2025;63(6):e2502006. Published online June 30, 2025; DOI: https://doi.org/10.71150/jm.2502006; Correction in: J. Microbiol 2025;63(7):e2507100

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Abstract PDF Supplementary Material: Two novel, Gram-stain-negative, anaerobic, and non-motile bacterial strains, designated KFT8^T and CG01^T, were isolated from the feces of healthy individuals without diagnosed diseases and characterized using a polyphasic approach. Phylogenetic analysis revealed that both strains belong to the genus Bacteroides, with < 99.0% similarity in their 16S rRNA gene sequences to B. facilis NSJ-77^T and B. nordii JCM 12987^T. Within the genus Bacteroides, strain KFT8^T exhibited the highest Orthologous Average Nucleotide Identity value of 94.7% and a digital DNA-DNA hybridization value of 63.7% with B. ovatus ATCC 8483^T, whereas strain CG01^T showed the highest values of 95.3% and 63.3%, respectively, with B. nordii JCM 12987^T. The values between the two novel strains were 74.8% and 21.4%, respectively, which are below the species delineation thresholds, supporting their classification as novel species. The major fatty acid of strain KFT8^T was C_18:1 ω9c, whereas strain CG01^T predominantly contained summed feature 11 (comprising iso-C_17:0 3OH and/or C_18:2 DMA). The only respiratory quinone was MK-11, the major polar lipid was phosphatidylethanolamine. Both strains produced succinic acid and acetic acid as common metabolic end-products of fermentation, while lactic acid and formic acid were detected individually in each strain. Based on polyphasic characterization, strains KFT8^T (= KCTC 15614^T = JCM 36011^T) and CG01^T (= KCTC 15613^T = JCM 36010^T) represent two novel species within the genus Bacteroides, for which the names Bacteroides celer sp. nov. and Bacteroides mucinivorans sp. nov. are proposed, respectively. Additionally, genome-based analyses and phenotypic comparisons revealed that B. koreensis and B. kribbi represent the same strain, showing genomic relatedness to B. ovatus that exceeds the threshold for species delineation. Consequently, we propose the reclassification of B. koreensis Shin et al. 2017 and B. kribbi Shin et al. 2017 as later heterotypic synonyms of B. ovatus Eggerth and Gagnon 1933 (Approved Lists 1980).

Review

Fecal Microbiota Transplantation: Indications, Methods, and Challenges.: Jee Young Lee, Yehwon Kim, Jiyoun Kim, Jiyeun Kate Kim; J. Microbiol. 2024;62(12):1057-1074. Published online November 18, 2024; DOI: https://doi.org/10.1007/s12275-024-00184-3

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Abstract PDF

Over the past two decades, as the importance of gut microbiota to human health has become widely known, attempts have been made to treat diseases by correcting dysbiosis of gut microbiota through fecal microbiota transplantation (FMT). Apart from current knowledge of gut microbiota, FMT to treat disease has a long history, from the treatment of food poisoning in the fourth century to the treatment of Clostridioides difficile infections in the twentieth century. In 2013, FMT was recognized as a standard treatment for recurrent C. difficile because it consistently showed high efficacy. Though recurrent C. difficile is the only disease internationally recognized for FMT efficacy, FMT has been tested for other diseases and shown some promising preliminary results. Different FMT methods have been developed using various formulations and administration routes. Despite advances in FMT, some issues remain to be resolved, such as donor screening, manufacturing protocols, and unknown components in the fecal microbiota. In this review, we discuss the mechanisms, clinical indications, methods, and challenges of current FMT. We also discuss the development of alternative therapies to overcome the challenges of FMT.

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Transplantation of Fecal Flora from Patients with Atherosclerosis to Mice Can Increase Serum Low-Density Lipoprotein Cholesterol and Affect Intestinal Flora and Its Metabolites
Liang Feng, Jianting Feng, Li He, Fu Chen, Xin Feng, Suwen Wang
Applied Microbiology.2025; 5(1): 29. CrossRef
Management of refractory checkpoint inhibitor-induced colitis
Anas Zaher, Maria Julia Moura Nascimento Santos, Hassan Elsaygh, Stephen J. Peterson, Carolina Colli Cruz, Anusha Shirwaikar Thomas, Yinghong Wang
Expert Opinion on Drug Safety.2025; : 1. CrossRef
Fecal Microbiota Transplantation (FMT) in Clostridium difficile Infection: A Paradigm Shift in Gastrointestinal Microbiome Modulation
Muhammad Hamza Saeed, Sundas Qamar, Ayesha Ishtiaq, Qudsia Umaira khan, Asma Atta, Maryam Atta, Hifza Ishtiaq, Marriam Khan, Muhammad Rawal Saeed, Ayesha Iqbal
Cureus.2025;[Epub] CrossRef
Exploring the gut microbiome’s influence on cancer-associated anemia: Mechanisms, clinical challenges, and innovative therapies
Ayrton Bangolo, Behzad Amoozgar, Maryam Habibi, Elizabeth Simms, Vignesh K Nagesh, Shruti Wadhwani, Nikita Wadhwani, Auda Auda, Daniel Elias, Charlene Mansour, Robert Abbott, Nisrene Jebara, Lili Zhang, Sarvarinder Gill, Kareem Ahmed, Andrew Ip, Andre Goy
World Journal of Gastrointestinal Pharmacology and Therapeutics.2025;[Epub] CrossRef
Microbiome Therapeutics for Clostridioides difficile Infection
Christine W. Lucky, Rachel L. Medernach, Brendan J. Kelly, Jennie H. Kwon, Michael H. Woodworth
Infectious Disease Clinics of North America.2025; 39(4): 663. CrossRef
Laboratory preparation methods for human-derived fecal microbial suspensions for fecal microbiota transplantation: a review and standardization perspectives
Jinhua Gong, Yuchi Liu, Liuye Huang
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Improving fecal transplantation precision for enhanced maturation of intestinal function in germ-free mice through microencapsulation and probiotic intervention
Furong Ba, Wei Wang, Yilun Huang, Shuobo Zhang, Bo Qiu, Siyuan Xie, Lvwan Xu, Wang Gao, Xiaoqin Zhang, Zhenyu Wen, Qifan Wang, Hainv Gao, Guoping Sheng, Björn Berglund, Ping Li, Lanjuan Li, Mingfei Yao
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Fecal microbiota transplantation as salvage therapy for disseminated strongyloidiasis in an immunosuppressed patient: a case report
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Journal Articles

Rhodobacteraceae are Prevalent and Ecologically Crucial Bacterial Members in Marine Biofloc Aquaculture: Meora Rajeev, Jang-Cheon Cho; J. Microbiol. 2024;62(11):985-997. Published online November 15, 2024; DOI: https://doi.org/10.1007/s12275-024-00187-0

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Bioflocs are microbial aggregates primarily composed of heterotrophic bacteria that play essential ecological roles in maintaining animal health, gut microbiota, and water quality in biofloc aquaculture systems. Despite the global adoption of biofloc aquaculture for shrimp and fish cultivation, our understanding of biofloc microbiota-particularly the dominant bacterial members and their ecological functions-remains limited. In this study, we employed integrated metataxonomic and metagenomic approaches to demonstrate that the family Rhodobacteraceae of Alphaproteobacteria consistently dominates the biofloc microbiota and plays essential ecological roles. We first analyzed a comprehensive metataxonomic dataset consisting of 200 16S rRNA gene amplicons collected across three Asian countries: South Korea, China, and Vietnam. Taxonomic investigation identified Rhodobacteraceae as the dominant and consistent bacterial members across the datasets. The predominance of this taxon was further validated through metagenomics approaches, including read taxonomy and read recruitment analyses. To explore the ecological roles of Rhodobacteraceae, we applied genome-centric metagenomics, reconstructing 45 metagenome-assembled genomes. Functional annotation of these genomes revealed that dominant Rhodobacteraceae genera, such as Marivita, Ruegeria, Dinoroseobacter, and Aliiroseovarius, are involved in vital ecological processes, including complex carbohydrate degradation, aerobic denitrification, assimilatory nitrate reduction, ammonium assimilation, and sulfur oxidation. Overall, our study reveals that the common practice of carbohydrate addition in biofloc aquaculture systems fosters the growth of specific heterotrophic bacterial communities, particularly Rhodobacteraceae. These bacteria contribute to maintaining water quality by removing toxic nitrogen and sulfur compounds and enhance animal health by colonizing gut microbiota and exerting probiotic effects.

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Ecological disposal of bauxite tailings and red mud: A sustainable strategy for bauxite industrial waste reuse
Xusheng Jiang, Xuehong Zhang, Xijun Liu, Hui Qiu, Mengting Lin, Guo Yu, Shouhui Zhang, Jie Liu
Resources, Conservation and Recycling.2025; 218: 108259. CrossRef
Variation of Microorganisms and Water Quality, and Their Impacts on the Production of Penaeus vannamei in Small-Scale Greenhouse Ponds
Siyu Wu, Haochang Su, Lei Su, Yucheng Cao, Guoliang Wen, Yu Xu, Bin Shen, Shanshan Wu, Yuting Su, Xiaojuan Hu
Microorganisms.2025; 13(3): 546. CrossRef
Effect of hydraulic retention time of sponge-based trickling filter for shrimp culture recirculating tank
Penpicha Satanwat, Mami Nagai, Tharin Boonprasertsakul, Akihiro Nagano, Tsutomu Okubo, Nur Adlin, Takahiro Watari, Masashi Hatamoto, Takashi Yamaguchi, Sitthakarn Sitthi, Wiboonluk Pungrasmi, Rapeepun Vanichviriyakit, Sorawit Powtongsook
Process Safety and Environmental Protection.2025; 198: 107154. CrossRef
Divergence patterns of bacterial communities between larviculture systems of two Penaeus vannamei strains with distinct culture traits
Heng Chen, Fengdie Zhang, Junqi Yu, Rudan Chen, Demin Zhang, Chen Chen, Kai Wang
Aquaculture.2025; 606: 742572. CrossRef
Influence of Polyester and Denim Microfibers on the Treatment and Formation of Aerobic Granules in Sequencing Batch Reactors
Victoria Okhade Onyedibe, Hassan Waseem, Hussain Aqeel, Steven N. Liss, Kimberley A. Gilbride, Roxana Sühring, Rania Hamza
Processes.2025; 13(7): 2272. CrossRef
Where Have You Been? Backtracking Microplastic to Its Source Using the Biomolecular Composition of the Ecocorona
Amanda L. Dawson, Utpal Bose, Sophia Escobar-Correas, Kuok Yap, David J. Craik, Cassandra L. Pegg
Environmental Science & Technology.2025; 59(41): 22227. CrossRef
Effects of butyric acid on the inhibition of Vibrio parahaemolyticus and its impacts on growth performance, intestinal microbiota, and water microbiota in Litopenaeus vannamei
Minghan Yin, Zhangyi Zheng, Ruiyan Xing, Lefei Jiao, Moussa Gouife, Tinghong Ming, Fei Kong, Shuang Qiu, Jiajie Xu
Aquaculture Reports.2025; 45: 103078. CrossRef
Evaluating the potential of Rhodopseudomonas faecalis PA2 as a probiotic and biofloc supplement for Nile tilapia (Oreochromis niloticus)
Wipavee Thaimuangphol, Ranumas Sukkum, Zhongliang Wang, Chewapat Saejung
Aquaculture Reports.2025; 45: 103201. CrossRef

Description of Streptococcus dentalis sp. nov., Streptococcus gingivalis sp. nov., and Streptococcus lingualis sp. nov., Isolated from Human Oral Cavities: Beom-Jin Goo, Young-Sik Choi, Do-Hun Gim, Su-Won Jeong, Jee-Won Choi, Hojun Sung, Jae-Yun Lee, Jin-Woo Bae; J. Microbiol. 2024;62(11):973-983. Published online November 12, 2024; DOI: https://doi.org/10.1007/s12275-024-00178-1

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We isolated three novel strains, S1^T, S2^T, and S5^T, from human oral cavities and identified them as distinct novel species. All these strains are facultatively anaerobic, Gram-stain-positive, and non-flagellated bacteria. Their optimal growth conditions for these strains were observed in Columbia broth (CB) at 37 °C, pH 7.0, and in the absence of NaCl. Phylogenetic analyses, employing the 16S rRNA gene and whole-genome sequencing, confirmed that all three strains belong to the genus Streptococcus. The 16S rRNA gene sequences of strains S1^T, S2^T, and S5^T showed the highest similarities to Streptococcus parasanguinis, 98.57%, 99.05%, and 99.05%, respectively, and the orthologous average nucleotide identity (OrthoANI) values between the three strains and S. parasanguinis were 93.82%, 93.67%, and 94.04%, respectively. The pairwise OrthoANI values between the novel strains were 94.37% (S1^T-S2^T), 95.03% (S2^T-S5^T), and 94.71% (S1^T-S5^T). All strains had C_20:1 ω9c and summed feature 8 (C_18:1 ω7c and/or C_18:1 ω6c) as major cellular fatty acids. Additionally, diphosphatidylglycerol (DPG) and hydroxyphosphatidylethanolamine (OH-PE) were identified as major polar lipids. Menaquinone was undetected in all strains. The results from the phylogenetic, phenotypic, chemotaxonomic, and genotypic analyses collectively indicated that strains S1^T, S2^T, and S5^T represent three distinct novel species within the genus Streptococcus, and we propose the names Streptococcus dentalis sp. nov. for strain S1^T (= KCTC 21234^T = JCM 36526^T), Streptococcus gingivalis sp. nov. for strain S2^T (= KCTC 21235^T = JCM 36527^T), and Streptococcus lingualis sp. nov. for strain S5^T (= KCTC 21236^T = JCM 36528^T).

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Validation List no. 223. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology .2025;[Epub] CrossRef

The Impact of Makgeolli Consumption on Gut Microbiota: An Enterotype-Based Preliminary Study: Gyungcheon Kim, Seongok Kim, Hayan Jung, Seohyun Kang, Gwoncheol Park, Hakdong Shin; J. Microbiol. 2024;62(11):965-972. Published online October 16, 2024; DOI: https://doi.org/10.1007/s12275-024-00176-3

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Makgeolli, a traditional Korean liquor, contains components such as lactic acid bacteria and dietary fiber, which can induce changes in the gut microbiome. Since variations in microbiome responses may exist between enterotypes-classifications based on the dominant bacterial populations in the gut-we hypothesized that the consumption of makgeolli leads to enterotype-dependent differences in gut microbial structures among healthy participants. This study aimed to determine the effect of makgeolli consumption on gut microbial structures by stratifying all participants into two enterotype groups: Bacteroides-dominant type (B-type, n = 7) and Prevotella-dominant type (P-type, n = 4). The B-type showed an increase in alpha diversity, while no significant difference was observed in the P-type following makgeolli consumption. The composition of gut microbiota significantly changed in the B-type, whereas no noticeable alteration was observed in the P-type after makgeolli consumption. Notably, Prevotella exhibited the most significant changes only in the P-type. In line with the increased abundance of Prevotella, the genes associated with carbohydrate metabolism, including pentose/glucuronate interconversions, fructose/mannose metabolism, starch/sucrose metabolism and amino sugar/nucleotide sugar metabolism were significantly enriched following makgeolli consumption in the P-type. These findings suggest that makgeolli consumption induces enterotype-dependent alterations in gut microbial composition and metabolic pathways, highlighting the potential for personalized dietary interventions.

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The prebiotic potential of dietary onion extracts: shaping gut microbial structures and promoting beneficial metabolites
Yebeen Yoo, Seongok Kim, WonJune Lee, Jinwoo Kim, Bokyung Son, Kwang Jun Lee, Hakdong Shin, Aviâja Lyberth Hauptmann
mSystems.2025;[Epub] CrossRef
Dietary Fiber Intake Improves Osteoporosis Caused by Chronic Lead Exposure by Restoring the Gut–Bone Axis
Ruijian Wang, Jin Shen, Chunqing Han, Xiaodong Shi, Yan Gong, Xiping Hu, Zhongtang Jia, Miaomiao Wang, Yu Wu
Nutrients.2025; 17(9): 1513. CrossRef
Modulation of Gut Microbiota by Cacao: Insights from an In Vitro Model
Jinshil Kim, Sunil Jung, Gyungcheon Kim, Jinwoo Kim, Bokyung Son, Hakdong Shin
Current Issues in Molecular Biology.2025; 47(6): 414. CrossRef

The Gut Microbiota Mediates the Protective Effects of Spironolactone on Myocardial Infarction: Lu Li, Jian-Yong Sun, Yu-Lin Li, Shi-Wei Zhu, Sheng-Zhong Duan; J. Microbiol. 2024;62(10):883-895. Published online September 3, 2024; DOI: https://doi.org/10.1007/s12275-024-00164-7

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Myocardial infarction (MI) is a type of cardiovascular disease that influences millions of human beings worldwide and has a great rate of mortality and morbidity. Spironolactone has been used as a critical drug for the treatment of cardiac failure and it ameliorates cardiac dysfunction post-MI. Despite these findings, whether there is a relationship between the therapeutic effects of spironolactone and the gut microorganism after MI has not been determined. In our research, we used male C57BL/6 J mice to explore whether the gut microbiota mediates the beneficial function of spironolactone after myocardial infarction. We demonstrated that deletion of the gut microbiota eliminated the beneficial function of spironolactone in MI mice, displaying exacerbated cardiac dysfunction, cardiac infarct size. In addition, the gut microbiota was altered by spironolactone after sham or MI operation in mice. We also used male C57BL/6 J mice to investigate the function of a probiotic in the myocardial infarction. In summary, our findings reveal a precious role of the gut flora in the therapeutic function of spironolactone on MI.

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Probiotics and Prebiotics in Post-Myocardial Infarction Rehabilitation: Mechanisms, Benefits, and Future Directions
Georgy Leonov, Elena Livantsova, Yurgita Varaeva, Antonina Starodubova
Current Nutrition Reports.2025;[Epub] CrossRef
Research Trends and Hotspots of Gut Microbiota and Its Metabolites in Cardiovascular Diseases: A Bibliometric Analysis
Kaixuan Zhang, Yajun Shi, Lirong Peng, Xiaofei Zhang, Nanbo Zheng, Jiajing Xin, Junbo Zou, Fei Luan
Journal of Multidisciplinary Healthcare.2025; Volume 18: 5125. CrossRef
Insights into the role of gut microbiota modulation in the management of various cardiovascular diseases: A new approach for improving the efficacy of current cardiovascular medications
Lamiaa A. Ahmed, Khaled F. Al-Massri
European Journal of Pharmacology.2025; 1007: 178210. CrossRef
The role of the gut microbiota in the onset and progression of heart failure: insights into epigenetic mechanisms and aging
Giulia Matacchione, Francesco Piacenza, Lorenzo Pimpini, Yuri Rosati, Serena Marcozzi
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Identification of avaC from Human Gut Microbial Isolates that Converts 5AVA to 2-Piperidone: Qiudi Zhou, Lihui Feng; J. Microbiol. 2024;62(5):367-379. Published online June 17, 2024; DOI: https://doi.org/10.1007/s12275-024-00141-0

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Abstract PDF

2-piperidone is a crucial industrial raw material of high-value nylon-5 and nylon-6,5. Currently, a major bottleneck in the biosynthesis of 2-piperidone is the identification of highly efficient 2-piperidone synthases. In this study, we aimed to identify specific strains among 51 human gut bacterial strains capable of producing 2-piperidone and to elucidate its synthetic mechanism. Our findings revealed that four gut bacterial strains, namely Collinsella aerofaciens LFYP39, Collinsella intestinalis LFYP54, Clostridium bolteae LFYP116, and Clostridium hathewayi LFYP18, could produce 2-piperidone from 5-aminovaleric acid (5AVA). Additionally, we observed that 2-piperidone could be synthesized from proline through cross-feeding between Clostridium difficile LFYP43 and one of the four 2-piperidone producing strains, respectively. To identify the enzyme responsible for catalyzing the conversion of 5AVA to 2-piperidone, we utilized a gain-of-function library and identified avaC (5-aminovaleric acid cyclase) in C. intestinalis LFYP54. Moreover, homologous genes of avaC were validated in the other three bacterial strains. Notably, avaC were found to be widely distributed among environmental bacteria. Overall, our research delineated the gut bacterial strains and genes involved in 2-piperidone production, holding promise for enhancing the efficiency of industrial biosynthesis of this compound.

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Metabolite biomarkers of screening neonatal congenital hypothyroidism based on dried blood spot metabolomics
Xingyu Guo, Feng Suo, Yuting Wang, Di Yu, Yi Wang, Bulian Dong, Lingshan Gou, Xinhui Gan, Benjing Wang, Chaowen Yu, Xiaoxiang Xie, Dandan Linghu, Xinyu Liu, Maosheng Gu, Guowang Xu
Analytical and Bioanalytical Chemistry.2025; 417(13): 2889. CrossRef
Scarless gene disruption enabled by a dual-plasmid knockout platform in a clinical infant-derived Bifidobacterium breve strain
Zhenxuan Gao, Lihui Feng
Frontiers in Microbiology.2025;[Epub] CrossRef

Effects of Light and Dark Conditions on the Transcriptome of Aging Cultures of Candidatus Puniceispirillum marinum IMCC1322: Ji Hyen Lee, Hyun-Myung Oh; J. Microbiol. 2024;62(4):297-314. Published online April 25, 2024; DOI: https://doi.org/10.1007/s12275-024-00125-0

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To elucidate the function of proteorhodopsin in Candidatus Puniceispirillum marinum strain IMCC1322, a cultivated representative of SAR116, we produced RNA-seq data under laboratory conditions. We examined the transcriptomes of six different cultures, including sets of expression changes under constant dark (DD), constant light (LL), and diel-cycled (LD; 14 h light: 10 h dark) conditions at the exponential and stationary/death phases. Prepared mRNA extracted from the six samples was analyzed on the Solexa Genome Analyzer with 36 cycles. Differentially expressed genes on the IMCC1322 genome were distinguished as four clusters by K-mean clustering and each CDS (n = 2546) was annotated based on the KEGG BRITE hierarchy. Cluster 0 (n = 1573) covered most constitutive genes including proteorhodopsin, retinoids, and glycolysis/TCA cycle. Cluster 1 genes (n = 754) were upregulated in stationary/death phase under constant dark conditions and included genes associated with bacterial defense, membrane transporters, nitrogen metabolism, and senescence signaling. Cluster 2 genes (n = 197) demonstrated upregulation in exponential phase cultures and included genes involved in genes for oxidative phosphorylation, translation factors, and transcription machinery. Cluster 3 (n = 22) contained light-stimulated upregulated genes expressed under stationary/phases. Stringent response genes belonged to cluster 2, but affected genes spanned various cellular processes such as amino acids, nucleotides, translation, transcription, glycolysis, fatty acids, and cell wall components. The coordinated expression of antagonistic stringent genes, including mazG, ppx/gppA, and spoT/relA may provide insight into the controlled cultural response observed between constant light and constant dark conditions in IMCC1322 cultures, regardless of cell numbers and biomass.

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Culture-supported ecophysiology of the SAR116 clade demonstrates metabolic and spatial niche partitioning
Jordan T Coelho, Lauren Teubner, Michael W Henson, V Celeste Lanclos, Conner Y Kojima, J Cameron Thrash
The ISME Journal.2025;[Epub] CrossRef
Effect of Light Regime on Candidatus Puniceispirillum marinum IMCC1322 in Nutrient-Replete Conditions
Hyun-Myung Oh, Ji Hyen Lee, Ahyoung Choi, Sung-Hyun Yang, Gyung-Hoon Shin, Sung Gyun Kang, Jang-Cheon Cho, Hak Jun Kim, Kae-Kyoung Kwon
Journal of Microbiology and Biotechnology.2024;[Epub] CrossRef

Reviews

Balancing Act of the Intestinal Antimicrobial Proteins on Gut Microbiota and Health: Ye Eun Ra, Ye‑Ji Bang; J. Microbiol. 2024;62(3):167-179. Published online April 17, 2024; DOI: https://doi.org/10.1007/s12275-024-00122-3

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Abstract PDF

The human gut houses a diverse and dynamic microbiome critical for digestion, metabolism, and immune development, exerting profound efects on human health. However, these microorganisms pose a potential threat by breaching the gut barrier, entering host tissues, and triggering infections, uncontrolled infammation, and even sepsis. The intestinal epithelial cells form the primary defense, acting as a frontline barrier against microbial invasion. Antimicrobial proteins (AMPs), produced by these cells, serve as innate immune efectors that regulate the gut microbiome by directly killing or inhibiting microbes. Abnormal AMP production, whether insufcient or excessive, can disturb the microbiome equilibrium, contributing to various intestinal diseases. This review delves into the complex interactions between AMPs and the gut microbiota and sheds light on the role of AMPs in governing host-microbiota interactions. We discuss the function and mechanisms of action of AMPs, their regulation by the gut microbiota, microbial evasion strategies, and the consequences of AMP dysregulation in disease. Understanding these complex interactions between AMPs and the gut microbiota is crucial for developing strategies to enhance immune responses and combat infections within the gut microbiota. Ongoing research continues to uncover novel aspects of this intricate relationship, deepening our understanding of the factors shaping gut health. This knowledge has the potential to revolutionize therapeutic interventions, ofering enhanced treatments for a wide range of gut-related diseases.

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Skin Deep: The Potential of Microbiome Cosmetics: Ju Hee Han, Hei Sung Kim; J. Microbiol. 2024;62(3):181-199. Published online April 16, 2024; DOI: https://doi.org/10.1007/s12275-024-00128-x

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Abstract PDF

The interplay between the skin microbiome and its host is a complex facet of dermatological health and has become a critical focus in the development of microbiome cosmetics. The skin microbiome, comprising various microorganisms, is essential from birth, develops over the lifespan, and performs vital roles in protecting our body against pathogens, training the immune system, and facilitating the breakdown of organic matter. Dysbiosis, an imbalance of these microorganisms, has been implicated in a number of skin conditions such as acne, atopic dermatitis, and skin cancer. Recent scientific findings have spurred cosmetic companies to develop products that preserve and enhance the skin's microbial diversity balance. These products may incorporate elements like prebiotics, probiotics, and postbiotics, which are beneficial for the skin microbiome. Beyond topical products, there's increasing interest in ingestible beauty supplements (i.e. oral probiotics), highlighting the connection between the gut and skin. This review examines the influence of the microbiome on skin health and the emerging trends of microbiome skincare products.

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MAPK Cascades in Plant Microbiota Structure and Functioning: Thijs Van Gerrewey, Hoo Sun Chung; J. Microbiol. 2024;62(3):231-248. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00114-3

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Abstract PDF

Mitogen-activated protein kinase (MAPK) cascades are highly conserved signaling modules that coordinate diverse biological processes such as plant innate immunity and development. Recently, MAPK cascades have emerged as pivotal regulators of the plant holobiont, infuencing the assembly of normal plant microbiota, essential for maintaining optimal plant growth and health. In this review, we provide an overview of current knowledge on MAPK cascades, from upstream perception of microbial stimuli to downstream host responses. Synthesizing recent fndings, we explore the intricate connections between MAPK signaling and the assembly and functioning of plant microbiota. Additionally, the role of MAPK activation in orchestrating dynamic changes in root exudation to shape microbiota composition is discussed. Finally, our review concludes by emphasizing the necessity for more sophisticated techniques to accurately decipher the role of MAPK signaling in establishing the plant holobiont relationship.

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Hydroxychloroquine an Antimalarial Drug, Exhibits Potent Antifungal Efficacy Against Candida albicans Through Multitargeting: Sargun Tushar Basrani, Tanjila Chandsaheb Gavandi, Shivani Balasaheb Patil, Nandkumar Subhash Kadam, Dhairyasheel Vasantrao Yadav, Sayali Ashok Chougule, Sankunny Mohan Karuppayil, Ashwini Khanderao Jadhav; J. Microbiol. 2024;62(5):381-391. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00111-6

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Candida albicans is the primary etiological agent associated with candidiasis in humans. Unrestricted growth of C. albicans can progress to systemic infections in the worst situation. This study investigates the antifungal activity of Hydroxychloroquine (HCQ) and mode of action against C. albicans. HCQ inhibited the planktonic growth and yeast to hyphal form morphogenesis of C. albicans significantly at 0.5 mg/ml concentration. The minimum inhibitory concentrations (MIC(50)) of HCQ for C. albicans adhesion and biofilm formation on the polystyrene surface was at 2 mg/ml and 4 mg/ml respectively. Various methods, such as scanning electron microscopy, exploration of the ergosterol biosynthesis pathway, cell cycle analysis, and assessment of S oxygen species (ROS) generation, were employed to investigate HCQ exerting its antifungal effects. HCQ was observed to reduce ergosterol levels in the cell membranes of C. albicans in a dose-dependent manner. Furthermore, HCQ treatment caused a substantial arrest of the C. albicans cell cycle at the G0/G1 phase, which impeded normal cell growth. Gene expression analysis revealed upregulation of SOD2, SOD1, and CAT1 genes after HCQ treatment, while genes like HWP1, RAS1, TEC1, and CDC 35 were downregulated. The study also assessed the in vivo efficacy of HCQ in a mice model, revealing a reduction in the pathogenicity of C. albicans after HCQ treatment. These results indicate that HCQ holds for the development of novel antifungal therapies.

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Genomic Evolution and Recombination Dynamics of Human Adenovirus D Species: Insights from Comprehensive Bioinformatic Analysis: Anyeseu Park, Chanhee Lee, Jeong Yoon Lee; J. Microbiol. 2024;62(5):393-407. Published online March 7, 2024; DOI: https://doi.org/10.1007/s12275-024-00112-5

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Human adenoviruses (HAdVs) can infect various epithelial mucosal cells, ultimately causing different symptoms in infected organ systems. With more than 110 types classified into seven species (A-G), HAdV-D species possess the highest number of viruses and are the fastest proliferating. The emergence of new adenovirus types and increased diversity are driven by homologous recombination (HR) between viral genes, primarily in structural elements such as the penton base, hexon and fiber proteins, and the E1 and E3 regions. A comprehensive analysis of the HAdV genome provides valuable insights into the evolution of human adenoviruses and identifies genes that display high variation across the entire genome to determine recombination patterns. Hypervariable regions within genetic sequences correlate with functional characteristics, thus allowing for adaptation to new environments and hosts. Proteotyping of newly emerging and already established adenoviruses allows for prediction of the characteristics of novel viruses. HAdV-D species evolved in a direction that increased diversity through gene recombination. Bioinformatics analysis across the genome, particularly in highly variable regions, allows for the verification or re-evaluation of recombination patterns in both newly introduced and pre-existing viruses, ultimately aiding in tracing various biological traits such as virus tropism and pathogenesis. Our research does not only assist in predicting the emergence of new adenoviruses but also offers critical guidance in regard to identifying potential regulatory factors of homologous recombination hotspots.

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Effects of Feather Hydrolysates Generated by Probiotic Bacillus licheniformis WHU on Gut Microbiota of Broiler and Common carp: Kamin Ke, Yingjie Sun, Tingting He, Wenbo Liu, Yijiao Wen, Siyuan Liu, Qin Wang, Xiaowei Gao; J. Microbiol. 2024;62(6):473-487. Published online February 29, 2024; DOI: https://doi.org/10.1007/s12275-024-00118-z

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Abstract PDF

Due to the ever-increasing demand for meat, it has become necessary to identify cheap and sustainable sources of protein for animal feed. Feathers are the major byproduct of poultry industry, which are rich in hard-to-degrade keratin protein. Previously we found that intact feathers can be digested into free amino acids, short peptides, and nano-/micro-keratin particles by the strain Bacillus licheniformis WHU in water, and the resulting feather hydrolysates exhibit prebiotic effects on mice. To explore the potential utilization of feather hydrolysate in the feed industry, we investigated its effects on the gut microbiota of broilers and fish. Our results suggest that feather hydrolysates significantly decrease and increase the diversity of gut microbial communities in broilers and fish, respectively. The composition of the gut microbiota was markedly altered in both of the animals. The abundance of bacteria with potentially pathogenic phenotypes in the gut microbial community of the fish significantly decreased. Staphylococcus spp., Pseudomonas spp., Neisseria spp., Achromobacter spp. were significantly inhibited by the feather hydrolysates. In addition, feather hydrolysates significantly improved proteolytic activity in the guts of broilers and fish. In fish, the expression levels of ZO-1 and TGF-α significantly improved after administration of feather hydrolysates. The results presented here suggest that feather hydrolysates generated by B. licheniformis WHU could be an alternative protein source in aquaculture and could exert beneficial effects on fish.

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Keratinous bioresources: their generation, microbial degradation, and value enhancement for biotechnological applications
Vijan Lal Vikash, Numbi Ramudu Kamini, Ganesan Ponesakki, Suresh Kumar Anandasadagopan
World Journal of Microbiology and Biotechnology.2025;[Epub] CrossRef

Mycobacterium tuberculosis PE_PGRS45 (Rv2615c) Promotes Recombinant Mycobacteria Intracellular Survival via Regulation of Innate Immunity, and Inhibition of Cell Apoptosis: Tao Xu , Chutong Wang , Minying Li , Jing Wei , Zixuan He , Zhongqing Qian , Xiaojing Wang , Hongtao Wang; J. Microbiol. 2024;62(1):49-62. Published online February 9, 2024; DOI: https://doi.org/10.1007/s12275-023-00101-0

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Tuberculosis (TB), a bacterial infectious disease caused by Mycobacterium tuberculosis (M. tuberculosis), is a significant global public health problem. Mycobacterium tuberculosis expresses a unique family of PE_PGRS proteins that have been implicated in pathogenesis. Despite numerous studies, the functions of most PE_PGRS proteins in the pathogenesis of mycobacterium infections remain unclear. PE_PGRS45 (Rv2615c) is only found in pathogenic mycobacteria. In this study, we successfully constructed a recombinant Mycobacterium smegmatis (M. smegmatis) strain which heterologously expresses the PE_PGRS45 protein. We found that overexpression of this cell wall-associated protein enhanced bacterial viability under stress in vitro and cell survival in macrophages. MS_PE_PGRS45 decreased the secretion of pro-inflammatory cytokines such as IL-1β, IL-6, IL-12p40, and TNF-α. We also found that MS_PE_PGRS45 increased the expression of the anti-inflammatory cytokine IL-10 and altered macrophage-mediated immune responses. Furthermore, PE_PGRS45 enhanced the survival rate of M. smegmatis in macrophages by inhibiting cell apoptosis. Collectively, our findings show that PE_PGRS45 is a virulent factor actively involved in the interaction with the host macrophage.

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Bei Chen, Belmin Bajramović, Bastienne Vriesendorp, Herman Pieter Spaink
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Ming-Rui Sun, Jia-Yin Xing, Xiao-Tian Li, Ren Fang, Yang Zhang, Zhao-Li Li, Ning-Ning Song
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Mycorrhizal Fungal Diversity Associated with Six Understudied Ectomycorrhizal Trees in the Republic of Korea: Ki Hyeong Park , Seung-Yoon Oh , Yoonhee Cho , Chang Wan Seo , Ji Seon Kim , Shinnam Yoo , Jisun Lim , Chang Sun Kim , Young Woon Lim; J. Microbiol. 2023;61(8):729-739. Published online September 4, 2023; DOI: https://doi.org/10.1007/s12275-023-00073-1

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Abstract PDF: Mycorrhizal fungi are key components of forest ecosystems and play essential roles in host health. The host specificity of mycorrhizal fungi is variable and the mycorrhizal fungi composition for the dominant tree species is largely known but remains unknown for the less common tree species. In this study, we collected soil samples from the roots of six understudied ectomycorrhizal tree species from a preserved natural park in the Republic of Korea over four seasons to investigate the host specificity of mycorrhizal fungi in multiple tree species, considering the abiotic factors. We evaluated the mycorrhizal fungal composition in each tree species using a metabarcoding approach. Our results revealed that each host tree species harbored unique mycorrhizal communities, despite close localization. Most mycorrhizal taxa belonged to ectomycorrhizal fungi, but a small proportion of ericoid mycorrhizal fungi and arbuscular mycorrhizal fungi were also detected. While common mycorrhizal fungi were shared between the plant species at the genus or higher taxonomic level, we found high host specificity at the species/OTU (operational taxonomic unit) level. Moreover, the effects of the seasons and soil properties on the mycorrhizal communities differed by tree species. Our results indicate that mycorrhizal fungi feature host-specificity at lower taxonomic levels.

Chemokine CCL6 Plays Key Role in the Inhibitory Effect of Vitamin A on Norovirus Infection: Heetae Lee , Giljae Lee , You-Hee Cho , Youngcheon Song , GwangPyo Ko; J. Microbiol. 2023;61(5):579-587. Published online May 26, 2023; DOI: https://doi.org/10.1007/s12275-023-00047-3

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Abstract PDF: Norovirus (NoV) is the most common viral cause of acute gastroenteritis worldwide. Vitamin A has demonstrated the potential to protect against gastrointestinal infections. However, the effects of vitamin A on human norovirus (HuNoV) infections remain poorly understood. This study aimed to investigate how vitamin A administration affects NoV replication. We demonstrated that treatment with retinol or retinoic acid (RA) inhibited NoV replication in vitro based on their effects on HuNoV replicon-bearing cells and murine norovirus-1 (MNV-1) replication in murine cells. MNV replication in vitro showed significant transcriptomic changes, which were partially reversed by retinol treatment. RNAi knockdown of CCL6, a chemokine gene that was downregulated by MNV infection but upregulated by retinol administration, resulted in increased MNV replication in vitro. This suggested a role of CCL6 in the host response to MNV infections. Similar gene expression patterns were observed in the murine intestine after oral administration of RA and/or MNV-1.CW1. CCL6 directly decreased HuNoV replication in HG23 cells, and might indirectly regulate the immune response against NoV infection. Finally, relative replication levels of MNV-1.CW1 and MNV-1.CR6 were significantly increased in CCL6 knockout RAW 264.7 cells. This study is the first to comprehensively profile transcriptomes in response to NoV infection and vitamin A treatment in vitro, and thus may provide new insights into dietary prophylaxis and NoV infections.

Epidemiological Characteristics of Norovirus Outbreaks in Shenyang from 2017 to 2021: Ying Qi , Xinxin Dong , Xiaowei Cheng , Han Xu , Jin Wang , Bing Wang , Ye Chen , Baijun Sun , Linlin Zhang , Yan Yao; J. Microbiol. 2023;61(4):471-478. Published online March 27, 2023; DOI: https://doi.org/10.1007/s12275-023-00033-9

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Norovirus is one of the leading causes of acute gastroenteritis outbreaks worldwide. This study aimed to identify the epidemiological characteristics of norovirus outbreaks and to provide evidence for public health entities. Specimens and epidemiological survey data were collected to determine if there were differences in the attack rate of norovirus in terms of the year, season, transmission route, exposure setting, and region and to determine whether there were relationships between the reporting interval, the number of illnesses in a single outbreak and the duration of the outbreak. Norovirus outbreaks were reported throughout the year, with seasonal characteristics (i.e., high rates in spring and winter). Among all regions in Shenyang with the exception of Huanggu and Liaozhong, norovirus outbreaks had been reported, and the primary genotype was GII.2[P16]. Vomiting was the most common symptom. The main places of occurrence were childcare institutions and schools. The person-to-person route was the main transmission route. The median duration of norovirus was 3 days (IQR [interquartile range]: 2–6 days), the median reporting interval was 2 days (IQR: 1–4 days), the median number of illnesses in a single outbreak was 16 (IQR: 10–25); there was a positive correlation between these parameters. Norovirus surveillance and genotyping studies still need to be further strengthened to increase knowledge regarding the pathogens and their variant characteristics, to better characterize the patterns of norovirus outbreaks and to provide information for outbreak prevention. Norovirus outbreaks should be detected, reported and handled early. Public health entities and the government should develop corresponding measures for different seasons, transmission routes, exposure settings, and regions.

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We previously showed that both high-mobility group box-1 (HMGB1) and natural killer (NK) cells contribute to respiratory syncytial virus (RSV)-induced persistent airway inflammation and airway hyperresponsiveness (AHR). Meanwhile, Chemokine (C-X-C motif) ligand 12 (CXCL12) and its specific receptor (chemokine receptor 4, CXCR4) play important roles in recruitment of immune cells. CXCL12 has been reported to form a complex with HMGB1 that binds to CXCR4 and increases inflammatory cell migration. The relationship between HMGB1, NK cells and chemokines in RSV-infected model remains unclear. An anti-HMGB1 neutralizing antibody and inhibitor of CXCR4 (AMD3100) was administered to observe changes of NK cells and airway disorders in nude mice and BALB/c mice. Results showed that the mRNA expression and protein levels of HMGB1 were elevated in late stage of RSV infection and persistent airway inflammation and AHR were diminished after administration of anti-HMGB1 antibodies, with an associated significant decrease in CXCR4+ NK cells. In addition, CXCL12 and CXCR4 were reduced after HMGB1 blockade. Treatment with AMD3100 significantly suppressed the recruitment of NK cells and alleviated the airway disorders. Thus, CXCL12/CXCR4 axis is involved in the recruitment of NK cells by HMGB1, contributing to persistent airway inflammation and AHR during the late stage of RSV infection.

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Effects of Continuous Straw Returning on Soil Functional Microorganisms and Microbial Communities: Yunpeng Guan , Meikang Wu , Songhao Che , Shuai Yuan , Xue Yang , Siyuan Li , Ping Tian , Lei Wu , Meiying Yang , Zhihai Wu; J. Microbiol. 2023;61(1):49-62. Published online January 26, 2023; DOI: https://doi.org/10.1007/s12275-022-00004-6

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This study examined the changes in soil enzymatic activity, microbial carbon source metabolic diversity, and straw decomposition rates in paddy fields treated with 1, 2, or 3 years of straw returning (SR1–SR3). The soil’s ability to decompose straw and cellulolytic bacteria increased with the number of treatment years (1: 31.9% vs. 2: 43.9% vs. 3: 51.9%, P < 0.05). The numbers of Azotobacter, Nitrobacteria, cellulolytic bacteria, and inorganic phosphate bacteria increased progressively with the numbers of straw returning years. Cellulolytic bacteria and inorganic phosphate bacteria were significantly positively correlated with the decomposition rate (r = 0.783 and r = 0.375, P < 0.05). Based on 16S sequencing results, straw returning improved the microbial diversity of paddy soils by increasing unclassified bacteria and keeping dominant soil microorganism populations unchanged. The relative importance of individual microbial taxa was compared using random forest models. Proteobacteria, ammoniating bacteria, and potassium dissolving bacteria contributed to peroxidase activity. The significant contributors to phosphate monoesterase were Acidobacteriota, Desulfobacterota, ammoniating bacteria, cellulolytic bacteria, and potassium-dissolving bacteria. Proteobacteria, ammoniating bacteria, cellulolytic bacteria, and potassium-dissolving bacteria contributed to urease activity. Desulfobacterota, ammoniating bacteria, cellulolytic bacteria, and potassium-dissolving bacteria contributed to the neutral invertase activity. In conclusion, soil microbial community structure and function were affected within 2 years of straw returning, which was driven by the combined effects of soil organic carbon, available nitrogen, available potassium, and pH. With elapsing straw returning years, soil properties interacted with soil microbial communities, and a healthier soil micro-ecological environment would form.

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Inhibition of KIF20A suppresses the replication of influenza A virus by inhibiting viral entry: Hoyeon Jeon , Younghyun Lim , In-Gu Lee , Dong-In Kim , Keun Pil Kim , So-Hee Hong , Jeongkyu Kim , Youn-Sang Jung , Young-Jin Seo; J. Microbiol. 2022;60(11):1113-1121. Published online November 1, 2022; DOI: https://doi.org/10.1007/s12275-022-2436-x

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The influenza A virus (IAV) has caused several pandemics, and therefore there are many ongoing efforts to identify novel antiviral therapeutic strategies including vaccines and antiviral drugs. However, influenza viruses continuously undergo antigenic drift and shift, resulting in the emergence of mutated viruses. In turn, this decreases the efficiency of existing vaccines and antiviral drugs to control IAV infection. Therefore, this study sought to identify alternative therapeutic strategies targeting host cell factors rather than viruses to avoid infection by mutated viruses. Particularly, we investigated the role of KIF20A that is one of kinesin superfamily proteins in the replication of IAV. The KIF20A increased viral protein levels in IAV-infected cells by regulating the initial entry stage during viral infection. Furthermore, the KIF20A inhibitor significantly suppressed viral replication, which protected mice from morbidity and mortality. Therefore, our findings demonstrated that KIF20A is highly involved in the viral replication process and viral propagation both in vitro and in vivo, and could thus be used as a target for the development of novel antiviral drugs.

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Younghyun Lim, Yong-Bin Cho, Young-Jin Seo
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Phenotypic and genomic characteristics of Brevibacterium zhoupengii sp. nov., a novel halotolerant actinomycete isolated from bat feces: Yuyuan Huang , Lingzhi Dong , Jian Gong , Jing Yang , Shan Lu , Xin-He Lai , Dong Jin , Qianni Huang , Ji Pu , Liyun Liu , Jianguo Xu; J. Microbiol. 2022;60(10):977-985. Published online August 19, 2022; DOI: https://doi.org/10.1007/s12275-022-2134-8

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Two strictly aerobic, Gram-staining-positive, non-spore-forming, regular rod-shaped (approximately 0.7 × 1.9 mm) bacteria (HY170T and HY001) were isolated from bat feces collected from Chongzuo city, Guangxi province (22°20􍿁54􍿂N, 106°49􍿁20􍿂E, July 2011) and Chuxiong Yi Autonomous Prefecture, Yunnan province (25°09􍿁10􍿂N, 102°04􍿁39􍿂E, October 2013) of South China, respectively. Optimal growth is obtained at 25–28°C (range, 4–32°C) on BHI-5% sheep blood plate with pH 7.5 (range, 5.0–10.0) in the presence of 0.5– 1.0% NaCl (w/v) (range, 0–15% NaCl [w/v]). The phylogenetic and phylogenomic trees based respectively on the 16S rRNA gene and 845 core gene sequences revealed that the two strains formed a distinct lineage within the genus Brevibacterium, most closely related to B. aurantiacum NCDO 739T (16S rRNA similarity, both 98.5%; dDDH, 46.7–46.8%; ANI, 91.9–92.1%). Strain HY170T contained MK-8(H2), diphosphatidylglycerol (DPG) and phosphatidylglycerol (PG), galactose and ribose as the predominant menaquinone, major polar lipids, and main sugars in the cell wall teichoic acids, respectively. The meso-diaminopimelic acid (meso-DAP) was the diagnostic diamino acid of the peptidoglycan found in strain HY170T. Anteiso-C15:0 and anteiso-C17:0 were the major fatty acids (> 10%) of strains HY170T and HY001, with anteiso-C17:1A predominant in strain HY170T but absent in strain HY001. Mining the genomes revealed the presence of secondary metabolite biosynthesis gene clusters encoding for non-alpha poly-amino acids (NAPAA), ectoine, siderophore, and terpene. Based on results from the phylogenetic, chemotaxonomic and phenotypic analyses, the two strains could be classified as a novel species of the genus Brevibacterium, for which the name Brevibacterium zhoupengii sp. nov. is proposed (type strain HY170T = CGMCC 1.18600T = JCM 34230T).

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Yuyuan Huang, Suping Zhang, Yuanmeihui Tao, Jing Yang, Shan Lu, Dong Jin, Ji Pu, Wenbo Luo, Han Zheng, Liyun Liu, Jia-fu Jiang, Jianguo Xu
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DNA vaccine dual-expressing viral hemorrhagic septicemia virus glycoprotein and C-C motif chemokine ligand 19 induces the expression of immune-related genes in zebrafish (Danio rerio): Jin-Young Kim , Hyoung Jun Kim , Jeong Su Park , Se Ryun Kwon; J. Microbiol. 2022;60(10):1032-1038. Published online August 1, 2022; DOI: https://doi.org/10.1007/s12275-022-2231-8

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Glycoprotein (G protein)-based DNA vaccines are effective in protecting aquaculture fish from rhabdoviruses but the degree of immune response they elicit depends on plasmid concentration and antigen cassette. Here, we developed a DNA vaccine using the viral hemorrhagic septicemia virus G (VG) gene and chemokine (C-C motif) ligand 19 (CCL19)a.2 regulated by the CMV promoter as the molecular adjuvant. After transfection of the prepared plasmid (pVG + CCL19) into epithelioma papulosum cyprini cells, mRNA expression was confirmed through quantitative real-time polymerase chain reaction. The vaccine was intramuscularly injected into zebrafish (Danio rerio), and 28 days after immunization, viral hemorrhagic septicemia virus (105 TCID50/10 μl/fish) was intraperitoneally injected. A survival rate of 68% was observed in the pVG + CCL19 group but this was not significantly different from the survival rate of fish treated with pVG alone, that is, without the adjuvant. However, the expression of interferonand cytokine-related genes in the spleen and kidney tissues of zebrafish was significantly increased (p < 0.05) on days 1, 3, 7, and 14 after immunization. Thus, CCL19a.2 induced an initial immune response as a molecular adjuvant, which may provide initial protection against virus infection before vaccination- induced antibody formation. This study provides insights on the functions of CCL19a.2 adjuvant in DNA vaccines.

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Review

[MINIREVIEW]Glaciers as microbial habitats: current knowledge and implication: Soyeon Kim , Hanbyul Lee , Soon-Do Hur , Woo Jun Sul , Ok-Sun Kim; J. Microbiol. 2022;60(8):767-779. Published online July 29, 2022; DOI: https://doi.org/10.1007/s12275-022-2275-9

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Glaciers, formed from the gradual accumulation of snow, can be continuous records representing past environments and recognized as a time capsule of our planetary evolution. Due to extremely harsh conditions, glacial ice has long been considered an uninhabitable ecosystem for microorganisms to sustain their life. However, recent developments in microbiological analysis techniques revealed the presence of unexpectedly diverse microbial strains. Glacial microorganisms could also provide valuable information, including not only biological diversity and structure but also molecular systematics, metabolic profiles, and evolutionary changes from the past climate and ecosystem. However, there are several obstacles in investigating the glacier environment, such as low regional accessibility, technical difficulties of ice coring, potential contamination during the sampling process, and low microbial biomass. This review aims to summarize recent knowledge on decontamination methods, biomass, diversity based on culture-dependent and -independent methods, application of biological proxies, greenhouse gas production and adaptive strategies in glaciers from various regions and to imply further directions for a comprehensive understanding of habitatility in an icy world including outer of our planet.

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Liang Shen, Jiayu Hu, Luyao Zhang, Zirui Wu, Liangzhong Chen, Namita Paudel Adhikari, Mukan Ji, Shaoxing Chen, Fang Peng, Yongqin Liu
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Liangzhong Chen, Tao Hong, Zirui Wu, Weizhi Song, Shaoxing X. Chen, Yongqin Liu, Liang Shen
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Insights into abundance, adaptation and activity of prokaryotes in arctic and Antarctic environments
Sif Marie Holmberg, Niels O. G. Jørgensen
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Journal Articles

Brachybacterium kimchii sp. nov. and Brachybacterium halotolerans subsp. kimchii subsp. nov., isolated from the Korean fermented vegetables, kimchi, and description of Brachybacterium halotolerans subsp. halotolerans subsp. nov.: Yujin Kim , Yeon Bee Kim , Juseok Kim , Joon Yong Kim , Tae Woong Whon , Won-Hyong Chung , Eun-Ji Song , Young-Do Nam , Se Hee Lee , Seong Woon Roh; J. Microbiol. 2022;60(7):678-688. Published online July 4, 2022; DOI: https://doi.org/10.1007/s12275-022-1581-6

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Two Gram-stain-positive, oxidase-negative, catalase-positive, and coccus-shaped bacterial strains, designated CBA3104T and CBA3105T, were isolated from kimchi. Strain CBA3104T and CBA3105T grew at 10–35°C (optimum, 25°C and 30°C, respectively), at pH 6.0–8.5 (optimum, pH 6.5), and in the presence of 0–15% (w/v) NaCl (optimum, 5%). A phylogenetic analysis based on 16S rRNA gene sequences revealed that strain CBA3104T formed a distinct phylogenetic lineage within the genus Brachybacterium whereas strain CBA3105T was closely positioned with Brachybacterium halotolerans MASK1Z-5T. The 16S rRNA gene sequence similarity between strains CBA3104T and CBA3105T was 99.9%, but ANI and dDDH values between strains CBA3104T and CBA3105T were 93.61% and 51.5%, respectively. Strain CBA3104T showed lower ANI and dDDH values than species delineation against three closely related strains and type species of the genus Brachybacterium, however, strain CBA3105T showed 96.63% ANI value and 69.6% dDDH value with Brachybacterium halotolerans MASK1Z-5T. Among biochemical analysis results, strain CBA3104T could uniquely utilize bromo-succinic acid whereas only strain CBA3105T was positive for alkaline phosphatase and α-fucosidase among two novel strains, closely related strains, and type species of the genus Brachybacterium. Compared with strain CBA3105T and Brachybacterium halotolerans JCM 34339T, strain CBA3105T was differentially positive for acid production of D-arabinose, D-adonitol, and potassium 5-ketogluconate and enzyme activity of β-glucuronidase. Both strains contained menaquinone-7 as the dominant quinone. The cell-wall peptidoglycan of two novel strains contained meso-diaminopimelic acid. The major fatty acids of strains CBA3104T and CBA3105T were anteiso-C15:0, anteiso-C17:0, and iso-C16:0. The major polar lipids of both strains were phosphatidylglycerol and diphosphatidylglycerol. Strain CBA3104T possessed a uniquely higher abundance of tRNA (97 tRNAs) than four Brachybacterium strains used for comparative taxonomic analysis (54–62 tRNAs). Both the CBA3104T and CBA3105T strain harbored various oxidoreductase, transferase, hydrolase, and lyase as strain-specific functional genes compared to closely related strains and Brachybacterium type species. The results of biochemical/physiological, chemotaxonomic, and genomic analyses demonstrated that strains CBA3104T and CBA3105T represent a novel species of the genus Brachybacterium and a novel subspecies of B. halotolerans, respectively, for which the names Brachybacterium kimchii sp. nov. and B. halotolerans subsp. kimchii subsp. nov. are proposed. The type strains of the novel species and the novel subspecies are CBA3104T (= KCCM 43417T = JCM 34759T) and CBA3105T (= KCCM 43418T = JCM 34760T), respectively.

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Metagenomic Insights into the Taxonomic and Functional Features of Traditional Fermented Milk Products from Russia
Alexander G. Elcheninov, Kseniya S. Zayulina, Alexandra A. Klyukina, Mariia K. Kremneva, Ilya V. Kublanov, Tatiana V. Kochetkova
Microorganisms.2023; 12(1): 16. CrossRef
Validation List no. 208. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, George M. Garrity
International Journal of Systematic and Evolutionary Microbiology .2022;[Epub] CrossRef
Complete Genome Sequence of Brachybacterium sp. Strain NBEC-018, Isolated from Nematode-Infected Potatoes
Ling Chen, Yueying Wang, Nanxi Liu, Lei Zhu, Yong Min, Yimin Qiu, Yuxi Tian, Xiaoyan Liu, David Rasko
Microbiology Resource Announcements.2022;[Epub] CrossRef

Pat- and Pta-mediated protein acetylation is required for horizontallyacquired virulence gene expression in Salmonella Typhimurium: Hyojeong Koo , Eunna Choi , Shinae Park , Eun-Jin Lee , Jung-Shin Lee; J. Microbiol. 2022;60(8):823-831. Published online May 27, 2022; DOI: https://doi.org/10.1007/s12275-022-2095-y

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Salmonella Typhimurium is a Gram-negative facultative pathogen that causes a range of diseases, from mild gastroenteritis to severe systemic infection in a variety of animal hosts. S. Typhimurium regulates virulence gene expression by a silencing mechanism using nucleoid-associated proteins such as Histone-like Nucleoid Structuring protein (H-NS) silencing. We hypothesize that the posttranslational modification, specifically protein acetylation, of proteins in gene silencing systems could affect the pathogenic gene expression of S. Typhimurium. Therefore, we created acetylation-deficient mutant by deleting two genes, pat and pta, which are involved in the protein acetylation pathway. We observed that the pat and pta deletion attenuates mouse virulence and also decreases Salmonella’s replication within macrophages. In addition, the Δpat Δpta strain showed a decreased expression of the horizontally-acquired virulence genes, mgtC, pagC, and ugtL, which are highly expressed in low Mg2+. The decreased virulence gene expression is possibly due to higher H-NS occupancy to those promoters because the pat and pta deletion increases H-NS occupancy whereas the same mutation decreases occupancy of RNA polymerase. Our results suggest that Pat- and Pta-mediated protein acetylation system promotes the expression of virulence genes by regulating the binding affinity of H-NS in S. Typhimurium.

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Reversible acetylation of ribosomal protein S1 serves as a smart switch for Salmonella to rapidly adapt to host stress
Yi-Lin Shen, Tian-Xian Liu, Lei Xu, Bang-Ce Ye, Ying Zhou
Nucleic Acids Research.2025;[Epub] CrossRef
Multi-Lasso Peptide-Based Synergistic Nanocomposite: A High-Stability, Broad-Spectrum Antimicrobial Agent with Potential for Combined Antibacterial Therapy
Yu Li, Jinyu Zhang, Ke Wei, Di Zhou, Zepeng Wang, Zhiwei Zeng, Yu Han, Weisheng Cao
ACS Nano.2024; 18(45): 31435. CrossRef

Dynamic colonization of gut microbiota and its influencing factors among the breast-feeding infants during the first two years of life: Ping Li , Xuelian Chang , Xiaoyu Chen , Tiantian Tang , Yajing Liu , Yu Shang , Kemin Qi; J. Microbiol. 2022;60(8):780-794. Published online May 27, 2022; DOI: https://doi.org/10.1007/s12275-022-1641-y

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The maturation of infant gut microbiota has lifelong implications on health, which has been proposed as the major events during the first year of life. However, little is known about their dynamic colonization and influencing elements among the first two-year infancy as well as into the adulthood. So based on the 16S rRNA sequencing data among 30 healthy breast-feeding mother-infant pairs with normal ranges of growth and development indicators from birth to two years old, the dynamic colonization of gut microbiota and its influencing factors were discussed using this birth cohort. Among these, we identified that the diversity of gut microbiota was significantly increased from six-month to two-year subgroups. The significantly dynamic trends of gut microbiota at the phylum (genus) level were that the percents of Firmicutes (Faecalibacterium, Blautia, Enterococcus, Subdoligranulum, Agathobacter, unidentified_Erysipelotrichaceae, Staphylococcus, unidentified_Ruminococcaceae, and Fusicatenibacter), Bacteroidetes and Verrucomicrobia were increased, while Actinobacteria (Bifidobacterium) and Proteobacteria (unidentified- Enterobacteriaceae and Klebsiella) were decreased with the increased ages from six months to two years old, which might simultaneously modulate the host pathways, such as the higher percents of chemoheterotrophy and fermentation, and lower percentages of nitrate_reduction, aerobic_chemoheterotrophy and so on. Furthermore, there were significant associations between maternal (milk microbiota, pre-pregnancy BMI, BMI increment during the pregnancy)/infant characteristics (BMI at birth and BMI gain), and the compositions of gut microbiota. However, no differences of gut microbiota were shown between the different sex and productive mode subgroups. Overall, the colonization of gut microbiota is significantly matured into the adulthood with the increased ages to two-years old and regulated by the above maternal/infant characteristics, which will provide a new direction for the host-gut microbiota interplay during the first two years of life.

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Maternal separation during lactation affects recognition memory, emotional behaviors, hippocampus and gut microbiota composition in C57BL6J adolescent female mice
Zuotian Wu, Lin Zhou, Huikang Fu, Yumeng Xie, Limin Sun, Yixin Li, Ling Xiao, Lei Zhang, Ying Su, Gaohua Wang
Behavioural Brain Research.2025; 476: 115249. CrossRef
Mother-to-infant vertical transmission in early life: a systematic review and proportional meta-analysis of Bifidobacterium strain transmissibility
Eduard Flores Ventura, María Esteban-Torres, Miguel Gueimonde, Douwe van Sinderen, Omry Koren, Lindsay J. Hall, Nicola Segata, Mireia Valles-Colomer, Maria Carmen Collado
npj Biofilms and Microbiomes.2025;[Epub] CrossRef
Ecological and dynamic analysis of gut microbiota in the early stage of azomethane-dextran sodium sulfate model in mice
Ruizheng Sun, Hao Chen, Siqi Yao, Zheng Yu, Chen Lai, Jing Huang
Frontiers in Cellular and Infection Microbiology.2023;[Epub] CrossRef
Impact of the gut-lung axis on tuberculosis susceptibility and progression
Aditya Enjeti, Harindra Darshana Sathkumara, Andreas Kupz
Frontiers in Microbiology.2023;[Epub] CrossRef

The efficacy of a 2,4-diaminoquinazoline compound as an intranasal vaccine adjuvant to protect against influenza A virus infection in vivo: Kyungseob Noh , Eun Ju Jeong , Timothy An , Jin Soo Shin , Hyejin Kim , Soo Bong Han , Meehyein Kim; J. Microbiol. 2022;60(5):550-559. Published online April 18, 2022; DOI: https://doi.org/10.1007/s12275-022-1661-7

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Adjuvants are substances added to vaccines to enhance antigen- specific immune responses or to protect antigens from rapid elimination. As pattern recognition receptors, Toll-like receptors 7 (TLR7) and 8 (TLR8) activate the innate immune system by sensing endosomal single-stranded RNA of RNA viruses. Here, we investigated if a 2,4-diaminoquinazolinebased TLR7/8 agonist, (S)-3-((2-amino-8-fluoroquinazolin- 4-yl)amino)hexan-1-ol (named compound 31), could be used as an adjuvant to enhance the serological and mucosal immunity of an inactivated influenza A virus vaccine. The compound induced the production of proinflammatory cytokines in macrophages. In a dose-response analysis, intranasal administration of 1 μg compound 31 together with an inactivated vaccine (0.5 μg) to mice not only enhanced virus-specific IgG and IgA production but also neutralized influenza A virus with statistical significance. Notably, in a virus-challenge model, the combination of the vaccine and compound 31 alleviated viral infection-mediated loss of body weight and increased survival rates by 40% compared with vaccine only-treated mice. We suggest that compound 31 is a promising lead compound for developing mucosal vaccine adjuvants to protect against respiratory RNA viruses such as influenza viruses and potentially coronaviruses.

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Efflux-Enhanced Imidazoquinolines To Exploit Chemoresistance
Muhammad Haroon, Sharmin Sultana, Seyedeh A. Najibi, Emily T. Wang, Abbey Michaelson, Pranto S. M. Al Muied, Amy E. Nielsen, Rock J. Mancini
ACS Omega.2025; 10(12): 12319. CrossRef
Design, Synthesis, and Biological Evaluation of New 2,6,7-Substituted Purine Derivatives as Toll-like Receptor 7 Agonists for Intranasal Vaccine Adjuvants
Morgan Kim, Kyungseob Noh, Pyeongkeun Kim, Jae Ho Kim, Byeong Wook Choi, Ravi Singh, Jun-Ho Choi, Soo Bong Han, Seong Soon Kim, Eun-Young Lee, Myung Ae Bae, Daeho Shin, Meehyein Kim, Jin Hee Ahn
Journal of Medicinal Chemistry.2024; 67(11): 9389. CrossRef
Evaluation of Antiviral Activity of Gemcitabine Derivatives against Influenza Virus and Severe Acute Respiratory Syndrome Coronavirus 2
Hyeon-Min Cha, Uk-Il Kim, Soo Bin Ahn, Myoung Kyu Lee, Haemi Lee, Hyungtae Bang, Yejin Jang, Seong Soon Kim, Myung Ae Bae, Kyungjin Kim, Meehyein Kim
ACS Infectious Diseases.2023; 9(4): 1033. CrossRef
Identification of broad-spectrum neutralizing antibodies against influenza A virus and evaluation of their prophylactic efficacy in mice
Sumin Son, Soo Bin Ahn, Geonyeong Kim, Yejin Jang, Chunkyu Ko, Meehyein Kim, Sang Jick Kim
Antiviral Research.2023; 213: 105591. CrossRef
Inhibition of KIF20A suppresses the replication of influenza A virus by inhibiting viral entry
Hoyeon Jeon, Younghyun Lim, In-Gu Lee, Dong-In Kim, Keun Pil Kim, So-Hee Hong, Jeongkyu Kim, Youn-Sang Jung, Young-Jin Seo
Journal of Microbiology.2022; 60(11): 1113. CrossRef

Randomized Controlled Trial

A split face study on the effect of an anti-acne product containing fermentation products of Enterococcus faecalis CBT SL-5 on skin microbiome modification and acne improvement: Hye Sung Han , Sun Hye Shin , Bo-Yun Choi , Nayeon Koo , Sanghyun Lim , Dooheon Son , Myung Jun Chung , Kui Young Park , Woo Jun Sul; J. Microbiol. 2022;60(5):488-495. Published online March 14, 2022; DOI: https://doi.org/10.1007/s12275-022-1520-6

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Antibiotic-resistant Cutibacterium acnes and dysbiosis of the skin microbiome are of increasing concern in acne treatment. Enterococcus faecalis, a widely used probiotic, has shown benefits for acne treatment by exerting antimicrobial activity against C. acnes. Therefore, this study aimed to investigate the efficacy and safety of an E. faecalis CBT SL-5-extract-containing lotion in patients with mild-to-moderate acne. Twenty patients were enrolled in this randomized, placebo-controlled, split-face comparative study. Patients were treated with E. faecalis lotion on one side of the face and a vehicle lotion on the other side for 4 weeks. The efficacy outcome measures included improvement in the investigators’ assessment of acne severity, patient satisfaction, changes in skin parameters and diversity of the skin microbiome. The investigators’ assessment score was significantly improved on the test side compared to the control side, after 2 weeks (p = 0.009) and 6 weeks (p < 0.0005). However, TEWL and skin hydration were not significantly different between the two groups. The phylogenetic diversity of the skin microbiota decreased over time in the skin samples of test side. In conclusion, E. faecalis CBT SL-5 extract can be a feasible and well-tolerated option for improving acne severity and skin microbiome dysbiosis in mild-to-moderate acne patients.

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Efficacy of a Postbiotic Formulation Combined With Microneedling for Mild‐to‐Moderate Acne: A Self‐Control Study
Zhanhong Li, Peihui Li, Yu Xu, Changqing Yan, Xiufen Ma, Huiying Wang, Hong Cheng, Jing Zeng, Ting Li, Xinxian Li, Jia Zhou, Jie Zhang, Jianfeng Zhou, Rongya Yang, Yan Wu, Li Li, Wei Lai, Jiangyun Zhao, Zhe Liu, Qiong Meng
Journal of Cosmetic Dermatology.2025;[Epub] CrossRef
Efficacy of Probiotic Supplements and Topical Applications in the Treatment of Acne: A Scoping Review of Current Results
Ida Ayu Manik Partha Sutema, Irma Latarissa, I Gusti Ayu Rai Widowati, Cynthia Retna Sartika, Ni Wayan Eka Ciptasari, Keri Lestari
Journal of Experimental Pharmacology.2025; Volume 17: 1. CrossRef
Acne vulgaris: advances in pathogenesis and prevention strategies
Weiping Xu, Jiahui Xu, Dandan Huang, Chen Wang, Jiajia Song, Xiaoyong Chen, Huayi Suo
European Journal of Clinical Microbiology & Infectious Diseases.2025; 44(3): 515. CrossRef
Analysis of global trends and hotspots of skin microbiome in acne: a bibliometric perspective
Lanfang Zhang, Yuan Cai, Lin Li, Jie Hu, Changsha Jia, Xu Kuang, Yi Zhou, Zhiai Lan, Chunyan Liu, Feng Jiang, Nana Sun, Ni Zeng
BioData Mining.2025;[Epub] CrossRef
Modulation of the microbiome: a paradigm shift in the treatment of acne
Tamara Searle, Firas Al-Niaimi, Faisal R Ali
Clinical and Experimental Dermatology.2025; 50(12): 2357. CrossRef
Integrated Metagenomic and Lipidomic Profiling Reveals Dysregulation of Facial Skin Microbiome in Moderate Acne Vulgaris
Xiaoye Qi, Zhaoying Han, Jie Meng, Hongrui Zhao, Maoyuan Zhou, Meichao Wang, Shengze Kang, Qingying Shi, Hongyan Li, Fuping Lu, Huabing Zhao
Microorganisms.2025; 13(12): 2674. CrossRef
Using probiotics to treat acne vulgaris: systematic review
Aleena Boby, Grace Lee, Nicole Natarelli, Lilia Correa
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Ju Hee Han, Hei Sung Kim
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Cong Huang, Fan Zhuo, Baoquan Han, Wenting Li, Bin Jiang, Kaoyuan Zhang, Xingling Jian, Zhenzhen Chen, Hui Li, Haiyan Huang, Xia Dou, Bo Yu
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Cutibacterium acnes Dysbiosis: Alternative Therapeutics for Clinical Application
Sara Sá, Ruben Fernandes, Álvaro Gestoso, José Mário Macedo, Daniela Martins-Mendes, Ana Cláudia Pereira, Pilar Baylina
Applied Sciences.2023; 13(21): 12086. CrossRef

Review

COVID-19 vaccine development based on recombinant viral and bacterial vector systems: combinatorial effect of adaptive and trained immunity: Mi-Hyun Lee , Bum-Joon Kim; J. Microbiol. 2022;60(3):321-334. Published online February 14, 2022; DOI: https://doi.org/10.1007/s12275-022-1621-2

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Abstract PDF

Severe acute respiratory syndrome coronavirus 2 virus (SARSCoV- 2) infection, which causes coronavirus disease 2019 (COVID-19), has led to many cases and deaths worldwide. Therefore, a number of vaccine candidates have been developed to control the COVID-19 pandemic. Of these, to date, 21 vaccines have received emergency approval for human use in at least one country. However, the recent global emergence of SARS-CoV-2 variants has compromised the efficacy of the currently available vaccines. To protect against these variants, the use of vaccines that modulate T cell-mediated immune responses or innate immune cell memory function, termed trained immunity, is needed. The major advantage of a vaccine that uses bacteria or viral systems for the delivery of COVID-19 antigens is the ability to induce both T cell-mediated and humoral immune responses. In addition, such vaccine systems can also exert off-target effects via the vector itself, mediated partly through trained immunity; compared to other vaccine platforms, suggesting that this approach can provide better protection against even vaccine escape variants. This review presents the current status of the development of COVID-19 vaccines based on recombinant viral and bacterial delivery systems. We also discuss the current status of the use of licensed live vaccines for other infections, including BCG, oral polio and MMR vaccines, to prevent COVID-19 infections.

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Enhancement of immunogenicity of SARS-CoV-2 spike protein expressed in Escherichia coli by fusion of the CRM197 functional domain
Xibing Yu, Yinmeng Yang, Miao Zhang, Qiantong Shen, Yun Zhu, Tong An, Siqi Li, Kexin Zhang, Shuaiyao Lu, Shaohong Lu, Fangcheng Zhuang, Meng Gao
Frontiers in Microbiology.2025;[Epub] CrossRef
Real-time infectious disease endurance indicator system for scientific decisions using machine learning and rapid data processing
Shivendra Dubey, Dinesh Kumar Verma, Mahesh Kumar
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What is the role of microbial biotechnology and genetic engineering in medicine?
Fernando Santos‐Beneit
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Previous BCG vaccination is associated with less severe clinical progression of COVID-19
Susan Martins Pereira, Florisneide Rodrigues Barreto, Ramon Andrade de Souza, Carlos Antonio de Souza Teles Santos, Marcos Pereira, Enny Santos da Paixão, Carla Cristina Oliveira de Jesus Lima, Marcio Santos da Natividade, Ana Angélica Bulcão Portela Lind
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COVID-19 Incidence Proportion as a Function of Regional Testing Strategy, Vaccination Coverage, and Vaccine Type
Areg A. Totolian, Viacheslav S. Smirnov, Alexei A. Krasnov, Edward S. Ramsay, Vladimir G. Dedkov, Anna Y. Popova
Viruses.2023; 15(11): 2181. CrossRef
The Cellular and Epigenetic Aspects of Trained Immunity and Prospects for Creation of Universal Vaccines on the Eve of More Frequent Pandemics
I. V. Alekseenko, R. G. Vasilov, L. G. Kondratyeva, S. V. Kostrov, I. P. Chernov, E. D. Sverdlov
Russian Journal of Genetics.2023; 59(9): 851. CrossRef
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E. P. Kharchenko
Epidemiology and Vaccinal Prevention.2023; 22(2): 12. CrossRef
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Tae-Hun Kim, Sojung Bae, Sunggeun Goo, Jinjong Myoung
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I. V. Alekseenko, R. G. Vasilov, L. G. Kondratyeva, S. V. Kostrov, I. P. Chernov, E. D. Sverdlov
Генетика.2023; 59(9): 981. CrossRef
BNT162b2 COVID-19 vaccination in children alters cytokine responses to heterologous pathogens and Toll-like receptor agonists
Andrés Noé, Thanh D. Dang, Christine Axelrad, Emma Burrell, Susie Germano, Sonja Elia, David Burgner, Kirsten P. Perrett, Nigel Curtis, Nicole L. Messina
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Journal Article

Alterations of oral microbiota in Chinese children with viral encephalitis and/or viral meningitis: Yijie Li , Jing Liu , Yimin Zhu , Chunying Peng , Yao Dong , Lili Liu , Yining He , Guoping Lu , Yingjie Zheng; J. Microbiol. 2022;60(4):429-437. Published online February 14, 2022; DOI: https://doi.org/10.1007/s12275-022-1560-y

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The role of oral microbiota in viral encephalitis and/or viral meningitis (VEVM) remains unclear. In this hospital-based, frequency-matched study, children with clinically diagnosed VEVM (n = 68) and those with other diseases (controls, n = 68) were recruited. Their oral swab samples were collected and the oral microbiota was profiled using 16S rRNA gene sequencing. The oral microbiota of children with VEVM exhibited different beta diversity metrics (unweighted UniFrac distance: P < 0.001, R2 = 0.025, Bray-curtis dissimilarity: P = 0.045, R2 = 0.011, and Jaccard dissimilarity: P < 0.001, R2 = 0.017) and higher relative abundances of taxa identified by Linear discriminant analysis (LDA) with effect size (Enterococcus, Pedobacter, Massilia, Prevotella_9, Psychrobacter, Butyricimonas, Bradyrhizobium, etc., LDA scores > 2.0) when compared with the control group. The higher pathway abundance of steroid hormone biosynthesis predicted by oral microbiota was suggested to be linked to VEVM (q = 0.020). Further, a model based on oral microbial traits showed good predictive performance for VEVM with an area under the receiver operating characteristic curve of 0.920 (95% confidence interval: 0.834–1.000). Similar results were also obtained between children with etiologically diagnosed VEVM (n = 43) and controls (n = 68). Our preliminary study identified VEVM-specific oral microbial traits among children, which can be effective in the diagnosis of VEVM.

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The microbiota-brain connection in neurological diseases: the ubiquitous short-chain fatty acids
Luisa BERTIN, Erica BONAZZI, Sonia FACCHIN, Greta LORENZON, Daria MANIERO, Caterina DE BARBA, Antonietta TOMASULO, Andrea FORTUNA, Fabiana ZINGONE, Brigida BARBERIO, Edoardo V. SAVARINO
Minerva Gastroenterology.2025;[Epub] CrossRef
Metagenomic next-generation sequencing and proteomics analysis in pediatric viral encephalitis and meningitis
Yi-Long Wang, Xiao-Tong Guo, Meng-Ying Zhu, Yu-Chen Mao, Xue-Bin Xu, Yi Hua, Lu Xu, Li-Hua Jiang, Cong-Ying Zhao, Xin Zhang, Guo-Xia Sheng, Pei-Fang Jiang, Zhe-Feng Yuan, Feng Gao
Frontiers in Cellular and Infection Microbiology.2023;[Epub] CrossRef
Bacterial Biomarkers of the Oropharyngeal and Oral Cavity during SARS-CoV-2 Infection
William Bourumeau, Karine Tremblay, Guillaume Jourdan, Catherine Girard, Catherine Laprise
Microorganisms.2023; 11(11): 2703. CrossRef

Review

Nanoparticle and virus-like particle vaccine approaches against SARS-CoV-2: Chulwoo Kim , Jae-Deog Kim , Sang-Uk Seo; J. Microbiol. 2022;60(3):335-346. Published online January 28, 2022; DOI: https://doi.org/10.1007/s12275-022-1608-z

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Abstract PDF

The global spread of coronavirus disease 2019 caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has provoked an urgent need for prophylactic measures. Several innovative vaccine platforms have been introduced and billions of vaccine doses have been administered worldwide. To enable the creation of safer and more effective vaccines, additional platforms are under development. These include the use of nanoparticle (NP) and virus-like particle (VLP) technology. NP vaccines utilize self-assembling scaffold structures designed to load the entire spike protein or receptor-binding domain of SARS-CoV-2 in a trimeric configuration. In contrast, VLP vaccines are genetically modified recombinant viruses that are considered safe, as they are generally replication-defective. Furthermore, VLPs have indigenous immunogenic potential due to their microbial origin. Importantly, NP and VLP vaccines have shown stronger immunogenicity with greater protection by mimicking the physicochemical characteristics of SARS-CoV-2. The study of NPand VLP-based coronavirus vaccines will help ensure the development of rapid-response technology against SARS-CoV-2 variants and future coronavirus pandemics.

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Journal Articles

The human symbiont Bacteroides thetaiotaomicron promotes diet-induced obesity by regulating host lipid metabolism: Sang-Hyun Cho , Yong-Joon Cho , Joo-Hong Park; J. Microbiol. 2022;60(1):118-127. Published online December 29, 2021; DOI: https://doi.org/10.1007/s12275-022-1614-1

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Abstract PDF

The gut microbiome plays an important role in lipid metabolism. Consumption of a high-fat diet (HFD) alters the bacterial communities in the gut, leading to metabolic disorders. Several bacterial species have been associated with diet-induced obesity, nonalcoholic fatty liver disease, and metabolic syndrome. However, the mechanisms underlying the control of lipid metabolism by symbiotic bacteria remain elusive. Here, we show that the human symbiont Bacteroides thetaiotaomicron aggravates metabolic disorders by promoting lipid digestion and absorption. Administration of B. thetaiotaomicron to HFD-fed mice promoted weight gain, elevated fasting glucose levels, and impaired glucose tolerance. Furthermore, B. thetaiotaomicron treatment upregulated the gene expression of the fatty acid transporter and increased fatty acid accumulation in the liver. B. thetaiotaomicron inhibits expression of the gene encoding a lipoprotein lipase inhibitor, angiopoietin-like protein 4 (ANGPTL4), thereby increasing lipase activity in the small intestine. In particular, we found that B. thetaiotaomicron induced the expression of hepcidin, the master regulator of iron metabolism and an antimicrobial peptide, in the liver. Hepcidin treatment resulted in a decrease in ANGPTL4 expression in Caco-2 cells, whereas treatment with an iron chelator restored ANGPTL4 expression in hepcidin- treated cells. These results indicate that B. thetaiotaomicron- mediated regulation of iron storage in intestinal epithelial cells may contribute to increased fat deposition and impaired glucose tolerance in HFD-fed mice.

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Improved tolerance of recombinant Chlamydomonas rainhardtii with putative 2-amino-3-carboxymuconate-6-semialdehyde decarboxylase from Pyropia yezoensis to nitrogen starvation: Seo-jeong Park , Joon Woo Ahn , Jong-il Choi; J. Microbiol. 2022;60(1):63-69. Published online December 29, 2021; DOI: https://doi.org/10.1007/s12275-022-1491-7

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In a previous study, a putative 2-amino-3-carboxymuconate- 6-semialdehyde decarboxylase (ACMSD) was highly expressed in a mutant strain of Pyropia yezoensis, which exhibited an improved growth rate compared to its wild strain. To investigate the functional role of the putative ACMSD (Pyacmsd) of P. yezoensis, the putative Pyacmsd was cloned and expressed in Chlamydomonas reinhardtii. Recombinant C. reinhardtii cells with Pyacmsd (Cr_Pyacmsd) exhibited enhanced tolerance compared to control C. reinhardtii cells (Cr_control) under nitrogen starvation. Notably, Cr_Pyacmsd cells showed accumulation of lipids in nitrogen-enriched conditions. These
results
demonstrate the role of Pyacmsd in the generation of acetyl-coenzyme A. Thus, it can be used to enhance the production of biofuel using microalgae such as C. reinhardtii and increase the tolerance of other biological systems to nitrogendeficient conditions.

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Characteristics of Recombinant Chlamydomonas reinhardtii Expressing Putative Germin-Like Protein from Neopyropia yezoensis
Jiae Kim, Jong-il Choi
Journal of Microbiology and Biotechnology.2024; 34(10): 2132. CrossRef
Overexpression of putative glutathione peroxidase from Neopyropia-associated microorganisms in Chlamydomonas to respond to abiotic stress
Jeong Hyeon Kim, Eun-Jeong Park, Jong-il Choi
Archives of Microbiology.2023;[Epub] CrossRef
Overexpression of S-Adenosylmethionine Synthetase in Recombinant Chlamydomonas for Enhanced Lipid Production
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Interaction between hypoviral-regulated fungal virulence factor laccase3 and small heat shock protein Hsp24 from the chestnut blight fungus Cryphonectria parasitica: Jeesun Chun† , Yo-Han Ko† , Dae-Hyuk Kim; J. Microbiol. 2022;60(1):57-62. Published online November 26, 2021; DOI: https://doi.org/10.1007/s12275-022-1498-0

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Laccase3 is an important virulence factor of the fungus Cryphonectria parasitica. Laccase3 gene (lac3) transcription is induced by tannic acid, a group of phenolic compounds found in chestnut trees, and its induction is regulated by the hypovirus CHV1 infection. CpHsp24, a small heat shock protein gene of C. parasitica, plays a determinative role in stress adaptation and pathogen virulence. Having uncovered in our previous study that transcriptional regulation of the CpHsp24 gene in response to tannic acid supplementation and CHV1 infection was similar to that of the lac3, and that conserved phenotypic changes of reduced virulence were observed in mutants of both genes, we inferred that both genes were implicated in a common pathway. Building on this finding, in this paper we examined whether the CpHsp24 protein (CpHSP24) was a molecular chaperone for the lac3 protein (LAC3). Our pull-down experiment indicated that the protein products of the two genes directly interacted with each other. Heterologous co-expression of CpHsp24 and lac3 genes using Saccharomyces cerevisiae resulted in more laccase activity in the cotransformant than in a parental lac3-expresssing yeast strain. These findings suggest that CpHSP24 is, in fact, a molecular chaperone for the LAC3, which is critical component of fungal pathogenesis.

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Characteristics and expression of heat shock gene Lghsp17.4 in Lenzites gibbosa, a white rot fungus of wood
Lianrong Feng, Yujie Chi, Jian Zhang, Xuxin Yang, Shuying Han
Journal of Forestry Research.2024;[Epub] CrossRef
Hypovirus infection induces proliferation and perturbs functions of mitochondria in the chestnut blight fungus
Jinzi Wang, Rui Quan, Xipu He, Qiang Fu, Shigen Tian, Lijiu Zhao, Shuangcai Li, Liming Shi, Ru Li, Baoshan Chen
Frontiers in Microbiology.2023;[Epub] CrossRef
Applying molecular and genetic methods to trees and their fungal communities
Markus Müller, Ursula Kües, Katharina B. Budde, Oliver Gailing
Applied Microbiology and Biotechnology.2023; 107(9): 2783. CrossRef

Effects of rehydration on physiological and transcriptional responses of a water-stressed rhizobium: Jie Zhu , Xin Jiang , Dawei Guan , Yaowei Kang , Li Li , Fengming Cao , Baisuo Zhao , Mingchao Ma , Ji Zhao , Jun Li; J. Microbiol. 2022;60(1):31-46. Published online November 26, 2021; DOI: https://doi.org/10.1007/s12275-022-1325-7

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As a microsymbiont of soybean, Bradyrhizobium japonicum plays an important role in symbiotic nitrogen fixation and sustainable agriculture. However, the survival of B. japonicum cells under water-deplete (e.g., drought) and water-replete (e.g., flood) conditions is a major concern affecting their nitrogen-fixing ability by establishing the symbiotic relationship with the host. In this study, we isolated a water stress tolerant rhizobium from soybean root nodules and tested its survival under water-deplete conditions. The rhizobium was identified as Bradyrhizobium japonicum and named strain 5038. Interestingly, both plate counting and live/dead fluorescence staining assays indicate that a number of viable but non-culturable cells exist in the culture medium upon the rehydration process which could cause dilution stress. Bradyrhizobium japonicum 5038 cells increased production of exopolysaccharide (EPS) and trehalose when dehydrated, suggesting that protective responses were stimulated. As expected, cells reduced their production upon the subsequent rehydration. To examine differential gene expression of B. japonicum 5038 when exposed to water-deplete and subsequent waterreplete conditions, whole-genome transcriptional analysis was performed under 10% relative humidity (RH), and subsequent 100% RH, respectively. A total of 462 differentially expressed genes (DEGs, > 2.0-fold) were identified under the 10% RH condition, while 3,776 genes showed differential expression during the subsequent rehydration (100% RH) process. Genes involved in signal transduction, inorganic ion transport, energy production and metabolisms of carbohydrates, amino acids, and lipids were far more up-regulated than downregulated in the 10% RH condition. Notably, trehalose biosynthetic genes (otsAB, treS, and treYZ), genes ligD, oprB, and a sigma factor rpoH were significantly induced by 10% RH. Under the subsequent 100% RH condition, genes involved in transcription, translation, cell membrane regulation, replication and repair, and protein processing were highly up-regulated. Interestingly, most of 10%-RH inducible genes displayed rehydration-repressed, except three genes encoding heat shock (Hsp20) proteins. Therefore, this study provides molecular evidence for the switch of gene expression of B. japonicum cells when encountered the opposite water availability from water-deplete to water-replete conditions.

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Review

[MINIREVIEW]The rapid adaptation of SARS-CoV-2–rise of the variants: transmission and resistance: Sandrine M. Soh , Yeongjun Kim , Chanwoo Kim , Ui Soon Jang , Hye-Ra Lee; J. Microbiol. 2021;59(9):807-818. Published online August 27, 2021; DOI: https://doi.org/10.1007/s12275-021-1348-5

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Abstract PDF

The causative factor of COVID-19, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is continuously mutating. Interestingly, identified mutations mainly occur in the spike (S) protein which interacts with the ACE2 receptor and is cleaved via serine protease TMPRSS2. Some mutated strains are becoming dominant in various parts of the globe because of increased transmissibility as well as cell entry efficacy. Remarkably, the neutralizing activity of monoclonal antibodies, convalescent sera, and vaccines against the variants has been reported to be significantly reduced. Therefore, the efficacy of various monoclonal antibodies therapy and vaccines against these variants is becoming a great global concern. We herein summarize the current status of SARS-CoV- 2 with gears shifted towards the recent and most common genetic variants in relation to transmission, neutralizing activity, and vaccine efficacy.

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Journal Articles

Comparative analysis of type 2 diabetes-associated gut microbiota between Han and Mongolian people: Shu-chun Li , Yao Xiao , Ri-tu Wu , Dan Xie , Huan-hu Zhao , Gang-yi Shen , En-qi Wu; J. Microbiol. 2021;59(7):693-701. Published online May 15, 2021; DOI: https://doi.org/10.1007/s12275-021-0454-8

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Due to the different rates of diabetes in different ethnic groups and the structural differences in intestinal microbiota, this study evaluated the changes in diabetes-related intestinal microbiota in two ethnic groups. Fifty-six stool samples were collected from subjects from the Han and Mongolian ethnic groups in China, including participants without diabetes (non-diabetic, ND) and with type 2 diabetes (T2D). The 16S rDNA gene V3 + V4 area was extracted from microbiota, amplified by PCR, and used to perform high-throughput sequencing and screen differential microbiota associated with ethnicity. The results showed that there were 44 T2D-related bacterial markers in the Han subjects, of which Flavonifractor, Alistipes, Prevotella, Oscillibacter, Clostridium XlVa, and Lachnospiracea_incertae_sedis were most closely related to diabetes. There were 20 T2D-related bacterial markers in the Mongolian subjects, of which Fastidiosipila and Barnesiella were most closely related to diabetes. The common markers of T2D bacteria in the two ethnic groups were Papillibacter and Bifidobacterium. There were 17 metabolic pathways with significant differences between the ND and T2D groups in the Han group, and 29 metabolic pathways in the Mongolian group. The glutamatergic metabolic pathway was the only common metabolic pathway in two ethnic groups. The composition and function of diabetes-related bacteria were significantly different among the different ethnic groups, which suggested that the influence of ethnic differences should be fully considered when studying the association between diabetes and bacteria. In addition, the common bacterial markers found in diabetic patients of different ethnic groups in this study can be used as potential targets to study the pathogenesis and treatment of diabetes.

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Impact of Ketogenic and Mediterranean Diets on Gut Microbiota Profile and Clinical Outcomes in Drug-Naïve Patients with Diabesity: A 12-Month Pilot Study
Vanessa Palmas, Andrea Deledda, Vitor Heidrich, Giuseppina Sanna, Giulia Cambarau, Michele Fosci, Lorenzo Puglia, Enrico Antonio Cappai, Alessio Lai, Andrea Loviselli, Aldo Manzin, Fernanda Velluzzi
Metabolites.2025; 15(1): 22. CrossRef
Gut microbiome links obesity to type 2 diabetes: insights from Mendelian randomization
Li Fu, Ancha Baranova, Hongbao Cao, Fuquan Zhang
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Diets shape thermal responses in Chinese giant salamanders by altering liver metabolism
Runliang Zhai, Chunlin Zhao, Liming Chang, Jiongyu Liu, Tian Zhao, Jianping Jiang, Wei Zhu
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Mohammad Shabani, Ali Ghoshehy, Amir Mohammad Mottaghi, Zahra Chegini, Azam Kerami, Aref Shariati, Majid Taati Moghadam
Frontiers in Cellular and Infection Microbiology.2025;[Epub] CrossRef
Pentachlorophenol increases diabetes risk by damaging β-cell secretion and disrupting gut microbial-related amino acids and fatty acids biosynthesis
Muke Han, Jie Yin, Xinyi Wang, Runhui Yang, Zhong Dong, Junyu Ning, Yajun Xu, Bing Shao
Journal of Hazardous Materials.2024; 480: 136103. CrossRef
Improvement of glucose metabolism disorder by wheat dietary fibre depended on the intake mode and regulated through TLRs/NF-κB/TNF pathway in db/db mice
Xinguo Liu, Shaojie Pang, Aoxiang Li, Yong Wang, Wei Fang, Wentao Qi
Food and Agricultural Immunology.2024;[Epub] CrossRef
Chemical modifications of xylan from sugarcane bagasse and their regulatory effects on gut microbiota in mice
Guozhu Zhang, Yuan Guan, Xin Zhang, Jing Li, Haishan Chen, Li Zhou, Jun Liang, Xia Li
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Yanchao Liu, Mingxiao Wang, Wuyuntana Li, Yumin Gao, Hailing Li, Ning Cao, Wenli Hao, Lingyan Zhao
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Bi-Directional Interactions between Glucose-Lowering Medications and Gut Microbiome in Patients with Type 2 Diabetes Mellitus: A Systematic Review
Ruolin Li, Fereshteh Shokri, Alejandro Rincon, Fernando Rivadeneira, Carolina Medina-Gomez, Fariba Ahmadizar
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Microbe-Disease Association Prediction Using RGCN Through Microbe-Drug-Disease Network
Yueyue Wang, Xiujuan Lei, Yi Pan
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Longitudinal Characterization of the Gut Microbiota in the Diabetic ZDSD Rat Model and Therapeutic Potential of Oligofructose
Savanna N. Weninger, Angela Ding, Elizabeth N. Browne, Morgan L. Frost, Gabriele Schiro, Daniel Laubitz, Frank A. Duca
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Chen-Yu Han, Xiao-Mei Ye, Jia-Ping Lu, Hai-Ying Jin, Ping Wang, Wei-Wei Xu, Min Zhang
Diabetes, Metabolic Syndrome and Obesity.2023; Volume 16: 2329. CrossRef
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Xue-Mei Gu, Chao-Yin Lu, Jian Pan, Jian-Zhong Ye, Qi-Han Zhu
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Rong Chen, Zhong-Yu Duan, Xiao-Hua Duan, Qing-Hua Chen, Jin Zheng
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Effects of Oral Glucose-Lowering Agents on Gut Microbiota and Microbial Metabolites
Dongmei Wang, Jieying Liu, Liyuan Zhou, Qian Zhang, Ming Li, Xinhua Xiao
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Depletion of gut secretory immunoglobulin A coatedLactobacillus reuteriis associated with gestational diabetes mellitus-related intestinal mucosal barrier damage
Haowen Zhang, Ce Qi, Yuning Zhao, Mengyao Lu, Xinyue Li, Jingbo Zhou, Hongyang Dang, Mengjun Cui, Tingting Miao, Jin Sun, Duo Li
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Effects of the loss of mismatch repair genes on single-strand annealing between divergent sequences in Saccharomyces cerevisiae: Ye-Seul Lim , Ju-Hee Choi , Kyu-Jin Ahn , Min-Ku Kim , Sung-Ho Bae; J. Microbiol. 2021;59(4):401-409. Published online March 29, 2021; DOI: https://doi.org/10.1007/s12275-021-1076-x

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Abstract PDF: Eukaryotic genomes contain many duplicated genes closely located with each other, such as the hexose transporter (HXT) genes in Saccharomyces cerevisiae. They can potentially recombine via single-strand annealing (SSA) pathway. SSA between highly divergent sequences generates heteroduplex DNA intermediates with many mismatches, which can be corrected by mismatch repair (MMR), resulting in recombinant sequences with a single junction point. In this report, we demonstrate that SSA between HXT1 and HXT4 genes in MMR-deficient yeast cells produces recombinant genes with multiple-junctions resulting from alternating HXT1 and HXT4 tracts. The mutations in MMR genes had differential effects on SSA frequencies; msh6Δ mutation significantly stimulated SSA events, whereas msh2Δ and msh3Δ slightly suppressed it. We set up an assay that can identify a pair of recombinant genes derived from a single heteroduplex DNA. As a result, the recombinant genes with multiple-junctions were found to accompany genes with single-junctions. Based on the results presented here, a model was proposed to generate multiple-junctions in SSA pathway involving an alternative short-patch repair system.

Effects of multi-species probiotic supplementation on alcohol metabolism in rats: Tae-Joong Lim , Sanghyun Lim , Jong Hyun Yoon , Myung Jun Chung; J. Microbiol. 2021;59(4):417-425. Published online March 29, 2021; DOI: https://doi.org/10.1007/s12275-021-0573-2

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Abstract PDF

Probiotics are known to protect against liver damage induced by the alcohol and acetaldehyde accumulation associated with alcohol intake. However, there have been few studies of the direct effect of probiotics on alcohol metabolism, and the types of probiotics that were previously analyzed were few in number. Here, we investigated the effects of 19 probiotic species on alcohol and acetaldehyde metabolism. Four probiotic species that had a relatively high tolerance to alcohol and metabolized alcohol and acetaldehyde effectively were identified: Lactobacillus gasseri CBT LGA1, Lactobacillus casei CBT LC5, Bifidobacterium lactis CBT BL3, and Bifidobacterium breve CBT BR3. These species also demonstrated high mRNA expression of alcohol and acetaldehyde dehydrogenases. Pro- AP4, a mixture of these four probiotics species and excipient, was then administered to rats for 2 weeks in advance of acute alcohol administration. The serum alcohol and acetaldehyde concentrations were significantly lower in the ProAP4-administered group than in the control and excipient groups. Thus, the administration of ProAP4, containing four probiotic species, quickly lowers blood alcohol and acetaldehyde concentrations in an alcohol and acetaldehyde dehydrogenasedependent manner. Furthermore, the serum alanine aminotransferase activity, which is indicative of liver damage, was significantly lower in the ProAP4 group than in the control group. The present findings suggest that ProAP4 may be an effective means of limiting alcohol-induced liver damage.

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Dong-Jin Kim, Ju Sung Lee, Seungwoo Kim, Sang Kyun Park, Yeo-Sang Yoon, Yougku Ryu, Myung Jun Chung
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Investigation of volatile compounds during fermentation of Elaeagnus moorcroftii Wall.ex schlecht. juice by Bifidobacterium animalis subsp. lactis HN-3 and Lacticaseibacillus paracasei YL-29
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Gut microbiome in alcohol use disorder: Implications for health outcomes and therapeutic strategies-a literature review
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Oral Administration of Bifidobacterium lactis Ameliorates Cognitive Deficits in Mice Intracerebroventricularly Administered Amyloid Beta via Regulation the Activation of Mitogen-activated Protein Kinases
Jong Kyu Choi, Oh Yun Kwon, Seung Ho Lee
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Alex E. Mohr, Mary M. Ahern, Dorothy D. Sears, Meg Bruening, Corrie M. Whisner
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Qingqing Liu, Hao Yang, Xing Kang, Haixia Tian, Yongbo Kang, Lin Li, Xiaodan Yang, Haixia Liu, Peng Ren, Xiaoyu Kuang, Mingwei Tong, Weiping Fan
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Probiotic cheese improves alcohol metabolism and alleviates alcohol-induced liver injury via the SIRT1/AMPK signaling pathway
Jong-Hwa Kim, Dohyun Woo, YoHan Nam, Jihye Baek, Ji-Yeon Lee, Wonyong Kim
Journal of Functional Foods.2023; 108: 105736. CrossRef
Harnessing the potential of probiotics in the treatment of alcoholic liver disorders
Garima Mishra, Pradeep Singh, Mulugeta Molla, Yohannes Shumet Yimer, Subas Chandra Dinda, Phool Chandra, Bhuvnesh Kumar Singh, Samuel Berihun Dagnew, Abraham Nigussie Assefa, Amien Ewunetie
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Precise strategies for selecting probiotic bacteria in treatment of intestinal bacterial dysfunctional diseases
Jiajun Yang, Shunyi Qin, Hao Zhang
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Lactobacillus rhamnosus CBT-LR5 Improves Lipid Metabolism by Enhancing Vitamin Absorption
Dong-Jin Kim, Tai Yeub Kim, Yeo-Sang Yoon, Yongku Ryu, Myung Jun Chung
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Regulation of Alcohol and Acetaldehyde Metabolism by a Mixture of Lactobacillus and Bifidobacterium Species in Human
Su-Jin Jung, Ji-Hyun Hwang, Eun-Ock Park, Seung-Ok Lee, Yun-Jo Chung, Myung-Jun Chung, Sanghyun Lim, Tae-Joong Lim, Yunhi Ha, Byung-Hyun Park, Soo-Wan Chae
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Agromyces laixinhei sp. nov. isolated from bat feces in China: Yanpeng Cheng , Yibo Bai , Yuyuan Huang , Jing Yang , Shan Lu , Dong Jin , Ji Pu , Han Zheng , Junqin Li , Ying Huang , Suping Wang , Jianguo Xu; J. Microbiol. 2021;59(5):467-475. Published online March 29, 2021; DOI: https://doi.org/10.1007/s12275-021-0546-5

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Three rod-shaped, Gram-stain-positive, and catalase-positive, phenotypically closely related isolates (HY052T, HY050, and HY045) were obtained from fecal samples collected from bats in Guangxi province and Chongqing city of China. Circular, smooth, light-yellow colonies appeared on brain heart infusion plate after 24–48 h incubation at 28°C. The optimal pH for growth was between 6.0 and 7.5. Based on 16S rRNA, the three isolates were phylogenetically related to Agromyces terreus DS-10T, Agromyces aureus AR33T, Agromyces salentinus 20-5T, Agromyces allii UMS-62T, Agromyces lapidis CD55T, and Agromyces italicus CD1T. Moreover, based on 296 core genes, the phylogenomic tree indicated that the three isolates clustered together, closest to Agromyces cerinus VKM Ac- 1340T and Agromyces fucosus VKM Ac-1345T but separated distantly from other Agromyces species. The average nucleotide identity values between strain HY052T and other Agromyces species ranged from 79.3% to 87.9%, lower than the 95–96% threshold. Furthermore, the genome of strain HY052T contains a circular chromosome of 3,437,203 bp with G + C content of 69.0 mol%. Main fatty acids were anteiso-C15:0 and anteiso-C17:0. The polar lipids comprised diphosphatidylglycerol, phosphatidylglycerol, and unidentified glycolipids. Rhamnose, ribose, and glucose were the primary cell wall sugars. The major peptidoglycan amino acids included alanine, glutamic acid, glycine, and 2,4-diaminobutyric acid. An additional remarkable difference from other Agromyces species is that MK-12 was the sole menaquinone in strain HY052T. Based on results from the polyphasic characterizations performed in this study, our isolates are proposed to be members of a novel species in genus Agromyces, named Agromyces laixinhei. The type strain is HY052T (= CGMCC 1.17175T = JCM 33695T).

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Validation List no. 223. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, Markus Göker
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Agromyces archimandritae sp. nov., isolated from the cockroach Archimandrita tessellata
Juan Guzman, Maite Ortúzar, Anja Poehlein, Rolf Daniel, Martha E. Trujillo, Andreas Vilcinskas
International Journal of Systematic and Evolutionary Microbiology .2022;[Epub] CrossRef
The Threat of Potentially Pathogenic Bacteria in the Feces of Bats
Yuyuan Huang, Yamin Sun, Qianni Huang, Xianglian Lv, Ji Pu, Wentao Zhu, Shan Lu, Dong Jin, Liyun Liu, Zhengli Shi, Jing Yang, Jianguo Xu, Biao He
Microbiology Spectrum.2022;[Epub] CrossRef
Morphological and genomic characteristics of two novel halotolerant actinomycetes, Tomitella gaofuii sp. nov. and Tomitella fengzijianii sp. nov. isolated from bat faeces
Yuyuan Huang, Jing Yang, Shan Lu, Xin-He Lai, Dong Jin, Juan Zhou, Sihui Zhang, Qianni Huang, Xianglian Lv, Wentao Zhu, Ji Pu, Ying Huang, Liyun Liu, Jianguo Xu
Systematic and Applied Microbiology.2022; 45(2): 126294. CrossRef
Phenotypic and genomic characteristics of Brevibacterium zhoupengii sp. nov., a novel halotolerant actinomycete isolated from bat feces
Yuyuan Huang, Lingzhi Dong, Jian Gong, Jing Yang, Shan Lu, Xin-He Lai, Dong Jin, Qianni Huang, Ji Pu, Liyun Liu, Jianguo Xu
Journal of Microbiology.2022; 60(10): 977. CrossRef

Description of Vagococcus coleopterorum sp. nov., isolated from the intestine of the diving beetle, Cybister lewisianus, and Vagococcus hydrophili sp. nov., isolated from the intestine of the dark diving beetle, Hydrophilus acuminatus, and emended description of the genus Vagococcus: Dong-Wook Hyun , Euon Jung Tak , Pil Soo Kim , Jin-Woo Bae; J. Microbiol. 2021;59(2):132-141. Published online December 23, 2020; DOI: https://doi.org/10.1007/s12275-021-0485-1

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A polyphasic taxonomic approach was used to characterize two novel bacterial strains, HDW17AT and HDW17BT, isolated from the intestine of the diving beetle Cybister lewisianus, and the dark diving beetle Hydrophilus acuminatus, respectively. Both strains were Gram-positive and facultative anaerobic cocci forming cream-colored colonies. The isolates grew optimally at 25°C, pH 7, in the presence of 0.3% (wt/vol) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences and genome sequences showed that the isolates were members of the genus Vagococcus, and strain HDW17AT was closely related to Vagococcus fessus CCUG 41755T (98.9% of 16S rRNA gene sequence similarity and 74.3% of average nucleotide identity [ANI]), whereas strain HDW17BT was closely related to Vagococcus fluvialis NCFB 2497T (98.9% of 16S rRNA gene sequence similarity and 76.6% of ANI). Both strains contained C16:0, and C18:1 ω9c as the major cellular fatty acids, but C16:1 ω9c was also observed only in strain HDW17BT as the major cellular fatty acid. The respiratory quinone of the isolates was MK-7. The major polar lipid components were phosphatidylglycerol, phosphatidylethanolamine, and diphosphatidylglycerol. The genomic DNA G + C content of strains HDW17AT and HDW17BT were 36.6 and 34.4%, respectively. Both strains had cell wall peptidoglycan composed of the amino acids L-alanine, glycine, D-glutamic acid, L-tryptophan, L-lysine, and L-aspartic acid, and the sugars ribose, glucose, and galactose. Based on phylogenetic, phenotypic, chemotaxonomic, and genotypic analyses, strains HDW17AT and HDW17BT represent two novel species in the genus Vagococcus. We propose the name Vagococcus coleopterorum sp. nov. for strain HDW17AT (= KACC 21348T = KCTC 49324T = JCM 33674T) and the name Vagococcus hydrophili sp. nov. for strain HDW17BT (= KACC 21349T = KCTC 49325T = JCM 33675T).

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Vagococcus proximus sp. nov. and Vagococcus intermedius sp. nov., originating from modified atmosphere packaged broiler meat
Per Johansson, Elina Jääskeläinen, Elina Säde, Johanna Björkroth
International Journal of Systematic and Evolutionary Microbiology .2023;[Epub] CrossRef
A case of Vagococcus fluvialis isolated from the bile of a patient with calculous cholecystitis
Dan Zhang, Xiaosu Wang, Jingdan Yu, Zheng Dai, Qichao Li, Litao Zhang
BMC Infectious Diseases.2023;[Epub] CrossRef
Vagococcus luciliae sp. nov., isolated from the common green bottle fly Lucilia sericata
Juan Guzman, Anja Poehlein, Rolf Daniel, Peter Kämpfer, Andreas Vilcinskas
International Journal of Systematic and Evolutionary Microbiology .2023;[Epub] CrossRef
Valid publication of new names and new combinations effectively published outside the IJSEM. Validation List no. 203
Aharon Oren, George M. Garrity
International Journal of Systematic and Evolutionary Microbiology .2022;[Epub] CrossRef
Effects of different doses of electron beam irradiation on bacterial community of Portunus trituberculatus
Huijuan Pan, Qi Yu, Chenru Qian, Haitao Shao, Jiajun Han, Yongyong Li, Yongjiang Lou
Food Bioscience.2021; 42: 101198. CrossRef
Description of Nocardioides piscis sp. nov., Sphingomonas piscis sp. nov. and Sphingomonas sinipercae sp. nov., isolated from the intestine of fish species Odontobutis interrupta (Korean spotted sleeper) and Siniperca scherzeri (leopard mandarin fish)
Dong-Wook Hyun, Yun-Seok Jeong, Jae-Yun Lee, Hojun Sung, So-Yeon Lee, Jee-Won Choi, Hyun Sik Kim, Pil Soo Kim, Jin-Woo Bae
Journal of Microbiology.2021; 59(6): 552. CrossRef

Extracellular products-mediated interspecific interaction between Pseudomonas aeruginosa and Escherichia coli: Yang Yuan , Jing Li , Jiafu Lin , Wenjuan Pan , Yiwen Chu , Balakrishnan Prithiviraj , Yidong Guo , Xinrong Wang , Kelei Zhao; J. Microbiol. 2021;59(1):29-40. Published online December 23, 2020; DOI: https://doi.org/10.1007/s12275-021-0478-0

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The Gram-negative pathogen Pseudomonas aeruginosa adopts several elaborate strategies to colonize a wide range of natural or clinical niches and to overcome the neighboring bacterial competitors in polymicrobial communities. However, the relationship and interaction mechanism of P. aeruginosa with other bacterial pathogens remains largely unexplored. Here we explore the interaction dynamics of P. aeruginosa and Escherichia coli, which frequently coinfect the lungs of immunocompromised hosts, by using a series of on-plate proximity assays and RNA-sequencing. We show that the extracellular products of P. aeruginosa can inhibit the growth of neighboring E. coli and induce a large-scale of transcriptional reprogramming of E. coli, especially in terms of cellular respiration- related primary metabolisms and membrane components. In contrast, the presence of E. coli has no significant effect on the growth of P. aeruginosa in short-term culture, but causes a dysregulated expression of genes positively controlled by the quorum-sensing (QS) system of P. aeruginosa during subsequent pairwise culture. We further demonstrate that the divergent QS-regulation of P. aeruginosa may be related to the function of the transcriptional regulator PqsR, which can be enhanced by E. coli culture supernatant to increase the pyocyanin production by P. aeruginosa in the absence of the central las-QS system. Moreover, the extracellular products of E. coli promote the proliferation and lethality of P. aeruginosa in infecting the Caenorhabditis elegans model. The current study provides a general characterization of the extracellular products-mediated interactions between P. aeruginosa and E. coli, and may facilitate the understanding of polymicrobial infections.

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Pigments from pathogenic bacteria: a comprehensive update on recent advances
Kusumita Acharya, Swarna Shaw, Sudipta Paul Bhattacharya, Shatarupa Biswas, Suman Bhandary, Arijit Bhattacharya
World Journal of Microbiology and Biotechnology.2024;[Epub] CrossRef
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Analyses of DNA double-strand break repair pathways in tandem arrays of HXT genes of Saccharomyces cerevisiae: Ju-Hee Choi , Ye-Seul Lim , Min-Ku Kim , Sung-Ho Bae; J. Microbiol. 2020;58(11):957-966. Published online October 30, 2020; DOI: https://doi.org/10.1007/s12275-020-0461-1

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Eukaryotic genomes contain numerous homologous repeat sequences including redundant genes with divergent homology that can be potential recombination targets. Recombination between divergent sequences is rare but poses a substantial threat to genome stability. The hexose transporter (HXT) gene family shares high sequence similarities at both protein and DNA levels, and some members are placed close together in tandem arrays. In this study, we show that spontaneous interstitial deletions occur at significantly high rates in HXT gene clusters, resulting in chimeric HXT sequences that contain a single junction point. We also observed that DNA double-strand breaks created between HXT genes produce primarily interstitial deletions, whereas internal cleavage of the HXT gene resulted in gene conversions as well as deletion products. Interestingly, interstitial deletions were less constrained by sequence divergence than gene conversion. Moreover, recombination-defective mutations differentially affected the survival frequency. Mutations that impair single-strand annealing (SSA) pathway greatly reduced the survival frequency by 10–1,000-fold, whereas disruption of Rad51-dependent homologous recombination exhibited only modest reduction. Our results indicate that recombination in the tandemly repeated HXT genes occurs primarily via SSA pathway.

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Xiang Wang, Yi Li, Zhehao Jin, Xiangjian Liu, Xiang Gao, Shuyuan Guo, Tao Yu
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Jucan Gao, Cuifang Ye, Jintao Cheng, Lihong Jiang, Xinghao Yuan, Jiazhang Lian
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Effects of the loss of mismatch repair genes on single-strand annealing between divergent sequences in Saccharomyces cerevisiae
Ye-Seul Lim, Ju-Hee Choi, Kyu-Jin Ahn, Min-Ku Kim, Sung-Ho Bae
Journal of Microbiology.2021; 59(4): 401. CrossRef

Characterization of the effects of terminators and introns on recombinant gene expression in the basidiomycete Ceriporiopsis subvermispora: Dong Xuan Nguyen , Emi Nishisaka , Moriyuki Kawauchi , Takehito Nakazawa , Masahiro Sakamoto , Yoichi Honda; J. Microbiol. 2020;58(12):1037-1045. Published online September 30, 2020; DOI: https://doi.org/10.1007/s12275-020-0213-2

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Terminators and introns are vital regulators of gene expression in many eukaryotes; however, the functional importance of these elements for controlling gene expression in Agaricomycetes remains unclear. In this study, the effects of Ceriporiopsis subvermispora terminators and introns on the expression of a recombinant hygromycin B phosphotransferase gene (hph) were characterized. Using a transient transformation system, we proved that a highly active terminator (e.g., the gpd terminator) is required for the efficient expression of the hph gene. Mutational analyses of the C. subvermispora gpd terminator revealed that hph expression was dictated by an A-rich region, which included a putative positioning element, and polyadenylation sites. In contrast, our results indicated that introns are not required for the expression of hph directed by the Csβ1-tub and Csgpd promoters in C. subvermispora. This study provides insights into the functions and cis-element requirements of transcriptional terminators in Agaricomycetes, which may be relevant for designing recombinant genes for this important fungal class.

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Development of a 2A peptide-based multigene expression system and its application for enhanced production of ganoderic acids in Ganoderma lucidum
Qiong Wang, Hong-Jun Liu, Yan Xu, Zi-Xu Wang, Bin Sun, Jun-Wei Xu
Journal of Biotechnology.2024; 393: 109. CrossRef
CRISPR/Cas9 using a transient transformation system in Ceriporiopsis subvermispora
Takehito Nakazawa, Chikako Inoue, Dong Xuan Nguyen, Moriyuki Kawauchi, Masahiro Sakamoto, Yoichi Honda
Applied Microbiology and Biotechnology.2022; 106(17): 5575. CrossRef
A promoter assay system using gene targeting in agaricomycetes Pleurotus ostreatus and Coprinopsis cinerea
Dong Xuan Nguyen, Takehito Nakazawa, Genki Myo, Chikako Inoue, Moriyuki Kawauchi, Masahiro Sakamoto, Yoichi Honda
Journal of Microbiological Methods.2020; 179: 106053. CrossRef

Review

Aequoribacter fuscus gen. nov., sp. nov., a new member of the family Halieaceae, isolated from coastal seawater: Shan-Hui Li , Jaeho Song , Ilnam Kang , Juchan Hwang , Jang-Cheon Cho; J. Microbiol. 2020;58(6):463-471. Published online May 27, 2020; DOI: https://doi.org/10.1007/s12275-020-0206-1

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A Gram-stain-negative, rod-shaped, obligately aerobic, nonflagellated, and chemoheterotrophic bacterium, designated IMCC3088T, was isolated from coastal seawater of the Yellow Sea. The 16S rRNA gene sequence analysis indicated that this strain belonged to the family Halieaceae which shared the highest sequence similarities with Luminiphilus syltensis NOR5-1BT (94.5%) and Halioglobus pacificus S1-72T (94.5%), followed by 92.3–94.3% sequence similarities with other species within the aforementioned family. Phylogenetic analyses demonstrated that strain IMCC3088T was robustly clustered with Luminiphilus syltensis NOR5-1BT within the family Halieaceae. However, average amino acid identity (AAI), percentages of conserved proteins (POCP), average nucleotide identity (ANI), and alignment fraction (AF) between strain IMCC3088T and Luminiphilus syltensis NOR5-1BT were 54.5%, 47.7%, 68.0%, and 16.5%, respectively, suggesting that they belonged to different genera. Whole-genome sequencing of strain IMCC3088T revealed a 3.1 Mbp genome size with a DNA G + C content of 51.7 mol%. The genome encoded diverse metabolic pathways including sulfur oxidation, phenol degradation, and proteorhodopsin phototrophy. Mono-unsaturated fatty acids were found to be the predominant cellular fatty acid components in the strain. Phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol were the primarily identified polar lipids, and ubiquinone-8 was identified as a major respiratory quinone. The taxonomic data collected herein suggested that strain IMCC3088T represented a novel genus and species of the family Halieaceae, for which the name Aequoribacter fuscus gen. nov., sp. nov. is proposed with the type strain (= KACC 15529T = NBRC 108213T).

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Microbiome Single Cell Atlases Generated with a Commercial Instrument
Xiangpeng Li, Linfeng Xu, Benjamin Demaree, Cecilia Noecker, Jordan E. Bisanz, Daniel W. Weisgerber, Cyrus Modavi, Peter J. Turnbaugh, Adam R. Abate
Advanced Science.2025;[Epub] CrossRef
Congregibacter variabilis sp. nov. and Congregibacter brevis sp. nov. Within the OM60/NOR5 Clade, Isolated from Seawater, and Emended Description of the Genus Congregibacter
Hyeonsu Tak, Miri S. Park, Hyerim Cho, Yeonjung Lim, Jang-Cheon Cho
Journal of Microbiology.2024; 62(9): 739. CrossRef
Diversity, abundance, and expression of proteorhodopsin genes in the northern South China Sea
Shanhui Li, Lingzi Yin, Li Duan, Jialing Li, Pandeng Wang, Shaoming Gao, Wendong Xian, Wenjun Li
Environmental Research.2024; 259: 119514. CrossRef
Phylogenomic evaluation of Mangrovimicrobium sediminis gen. nov. sp. nov., the first nitrogen fixing member of the family Halieaceae adapted to mangrove habitat and reclassification of Halioglobus pacificus to Pseudohaliglobus pacificus comb. nov.
Pravin Kumar, Ashish Verma, Pooja Yadav, Joyasree Das, Lalit Kumar, Srinivasan Krishnamurthi
Science of The Total Environment.2024; 933: 172995. CrossRef
Metabolic Versatility of the FamilyHalieaceaeRevealed by the Genomics of Novel Cultured Isolates
Shan-Hui Li, Ilnam Kang, Jang-Cheon Cho, Eva C. Sonnenschein
Microbiology Spectrum.2023;[Epub] CrossRef
Sediminihaliea albiluteola gen. nov., sp. nov., a new member of the family Halieaceae, isolated from marine sediment
Shan Jiang, Feng-Bai Lian, You-Yang Sun, Xiao-Kui Zhang, Zong-Jun Du
International Journal of Systematic and Evolutionary Microbiology .2021;[Epub] CrossRef
Valid publication of new names and new combinations effectively published outside the IJSEM
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Journal Articles

Lactobacillus crispatus and its enolase and glutamine synthetase influence interactions between Neisseria gonorrhoeae and human epithelial cells: Jagoda Płaczkiewicz , Paulina Chmiel , Ewelina Malinowska , Pawel B&# , Agnieszka Kwiatek; J. Microbiol. 2020;58(5):405-414. Published online April 11, 2020; DOI: https://doi.org/10.1007/s12275-020-9505-9

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Neisseria gonorrhoeae, an obligatory human pathogen causes the sexually transmitted disease gonorrhea, which remains a global health problem. N. gonorrhoeae primarily infects the mucosa of the genitourinary tract, which in women, is colonized by natural microbiota, dominated by Lactobacillus spp., that protect human cells against pathogens. In this study, we demonstrated that precolonization of human epithelial cells with Lactobacillus crispatus, one of the most prevalent bacteria in the female urogenital tract, or preincubation with the L. crispatus enolase or glutamine synthetase impairs the adhesion and invasiveness of N. gonorrhoeae toward epithelial cells, two crucial steps in gonococcal pathogenesis. Furthermore, decreased expression of genes encoding the proinflammatory cytokines, TNFα and CCL20, which are secreted as a consequence of N. gonorrhoeae infection, was observed in N. gonorrhoeae-infected epithelial cells that had been precolonized with L. crispatus or preincubated with enolase and glutamine synthetase. Thus, our results indicate that the protection of human cells against N. gonorrhoeae infection is a complex process and that L. crispatus and its proteins enolase and glutamine synthetase can have a potential role in protecting epithelial cells against gonococcal infection. Therefore, these results are important since disturbances of the microbiota or of its proteins can result in dysbiosis, which is associated with increased susceptibility of epithelium to pathogens.

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Probiotics: Health benefits, food application, and colonization in the human gastrointestinal tract
Li Ying Jessie Lau, Siew Young Quek
Food Bioengineering.2024; 3(1): 41. CrossRef
Use of probiotic lactobacilli in the treatment of vaginal infections: In vitro and in vivo investigations
Peng Liu, Yune Lu, Rongguo Li, Xiaodi Chen
Frontiers in Cellular and Infection Microbiology.2023;[Epub] CrossRef
Enhanced IgA coating of bacteria in women with Lactobacillus crispatus-dominated vaginal microbiota
Annelot C. Breedveld, Heleen J. Schuster, Robin van Houdt, Rebecca C. Painter, Reina E. Mebius, Charlotte van der Veer, Sylvia M. Bruisten, Paul H. M. Savelkoul, Marjolein van Egmond
Microbiome.2022;[Epub] CrossRef
Molecular Regulatory Mechanisms Drive Emergent Pathogenetic Properties of Neisseria gonorrhoeae
Ashwini Sunkavalli, Ryan McClure, Caroline Genco
Microorganisms.2022; 10(5): 922. CrossRef
Both Neisseria gonorrhoeae and Neisseria sicca Induce Cytokine Secretion by Infected Human Cells, but Only Neisseria gonorrhoeae Upregulates the Expression of Long Non-Coding RNAs
Jagoda Płaczkiewicz, Monika Adamczyk-Popławska, Ewa Kozłowska, Agnieszka Kwiatek
Pathogens.2022; 11(4): 394. CrossRef
Role of the human vaginal microbiota in the regulation of inflammation and sexually transmitted infection acquisition: Contribution of the non-human primate model to a better understanding?
Cindy Adapen, Louis Réot, Elisabeth Menu
Frontiers in Reproductive Health.2022;[Epub] CrossRef
Alterations of Vaginal Microbiota in Women With Infertility and Chlamydia trachomatis Infection
Hongliang Chen, Li Wang, Lanhua Zhao, Lipei Luo, Shuling Min, Yating Wen, Wenbo Lei, Mingyi Shu, Zhongyu Li
Frontiers in Cellular and Infection Microbiology.2021;[Epub] CrossRef
Lactobacillus Cell Surface Proteins Involved in Interaction with Mucus and Extracellular Matrix Components
Lidia Muscariello, Barbara De Siena, Rosangela Marasco
Current Microbiology.2020; 77(12): 3831. CrossRef

Anaerotignum faecicola sp. nov., isolated from human faeces: Seung-Hyeon Choi , Ji-Sun Kim , Jam-Eon Park , Keun Chul Lee , Mi Kyung Eom , Byeong Seob Oh , Seung Yeob Yu , Se Won Kang , Kook-Il Han , Min Kuk Suh , Dong Ho Lee , Hyuk Yoon , Byung-Yong Kim , Je Hee Lee , Ju Huck Lee , Jung-Sook Lee , Seung-Hwan Park; J. Microbiol. 2019;57(12):1073-1078. Published online November 4, 2019; DOI: https://doi.org/10.1007/s12275-019-9268-3

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A strictly anaerobic bacterium, designated as strain KGMB- 03357T, was isolated from the faeces of a healthy Korean selected by Bundang Seoul National University based on health status. Cells of strain KGMB03357T are Gram-stain-positive, non-motile, non-spore-forming, and observed as straight or curved rods. The isolate grew at 10–45°C (optimum temperature of 40°C) and a pH range of 5.1–10.5 (optimum pH of 6.8). Analysis of phylogenetic trees based on the 16S rRNA gene sequences revealed that strain KGMB03357T forms a lineage within the genus Anaerotignum, and is most closely related to Anaerotignum lactatifermentans G17T (= KCTC 15066T, 96.1%), Anaerotignum propionicum DSM 1682T (= KCTC 5582T, 94.9%), Anaerotignum neopropionicum DSM 03847T (= KCTC 15564T, 94.9%), and Anaerotignum aminivorans SH021T (= KCTC 15705T, 94.8%). The ANI values between strain KGMB 03357T and members of the genus Anaerotignum were 73.3–71.0%, which are below the ANI criterion for interspecies identity. The DNA G + C content based on the whole-genome sequence is 47.3 mol%. The major cellular fatty acids of strain KGMB03357T are C16:0, C18:0, C18:1 cis 9, and anteiso-C15:0. Strain KGMB03357T contains meso-diaminopimelic acid as the diagnostic amino acid in the cell wall peptidoglycan. Based on the phenotypic, phylogenetic, and genomic properties, strain KGMB 03357T represents a novel species of the genus Anaerotignum, for which the name Anaerotignum faecicola sp. nov. is proposed. The type strain is KGMB03357T (= KCTC 15736T = DSM 107953T).

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Dietary supplementation of solubles from shredded, steam-exploded pine particles modulates cecal microbiome composition in broiler chickens
Chris Major Ncho, Akshat Goel, Vaishali Gupta, Chae-Mi Jeong, Ji-Young Jung, Si-Young Ha, Jae-Kyung Yang, Yang-Ho Choi
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Shishi Huang, Yuan Zou, Hongbiao Tang, Jingyu Zhuang, Zhiwei Ye, Tao Wei, Junfang Lin, Qianwang Zheng
Journal of the Science of Food and Agriculture.2023; 103(4): 1885. CrossRef
Anaeropeptidivorans aminofermentans gen. nov., sp. nov., a mesophilic proteolytic salt-tolerant bacterium isolated from a laboratory-scale biogas fermenter, and emended description of Clostridium colinum
Nora Köller, Sarah Hahnke, Vladimir Zverlov, Daniel Wibberg, Andreas Klingl, Tobias Busche, Michael Klocke, Alfred Pühler, Andreas Schlüter, Wolfgang Liebl, Irena Maus
International Journal of Systematic and Evolutionary Microbiology .2023;[Epub] CrossRef
Chakrabartyella piscis gen. nov., sp. nov., a member of the family Lachnospiraceae, isolated from the hindgut of the marine herbivorous fish Kyphosus sydneyanus
Bikiran Pardesi, Anthony M. Roberton, Emily M. Wollmuth, Esther R. Angert, Douglas I. Rosendale, William Lindsey White, Kendall D. Clements
International Journal of Systematic and Evolutionary Microbiology .2023;[Epub] CrossRef
New Insights into the Physiology of the Propionate Producers Anaerotignum propionicum and Anaerotignum neopropionicum (Formerly Clostridium propionicum and Clostridium neopropionicum)
Tina Baur, Peter Dürre
Microorganisms.2023; 11(3): 685. CrossRef
Update on Accepted Novel Bacterial Isolates Derived from Human Clinical Specimens and Taxonomic Revisions Published in 2020 and 2021
Erik Munson, Karen C. Carroll, Romney M. Humphries
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Genome-scale metabolic modelling enables deciphering ethanol metabolism via the acrylate pathway in the propionate-producer Anaerotignum neopropionicum
Sara Benito-Vaquerizo, Ivette Parera Olm, Thijs de Vroet, Peter J. Schaap, Diana Z. Sousa, Vitor A. P. Martins dos Santos, Maria Suarez-Diez
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mBio.2022;[Epub] CrossRef
List of new names and new combinations previously effectively, but not validly, published
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Rhizocompartments and environmental factors affect microbial composition and variation in native plants: Myung-Suk Kang , Moonsuk Hur , Soo-Je Park; J. Microbiol. 2019;57(7):550-561. Published online June 27, 2019; DOI: https://doi.org/10.1007/s12275-019-8646-1

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Molecular analysis based on large-scale sequencing of the plant microbiota has revealed complex relationships between plants and microbial communities, and environmental factors such as soil type can influence these relationships. However, most studies on root-associated microbial communities have focused on model plants such as Arabidopsis, rice or crops. Herein, we examined the microbiota of rhizocompartments of two native plants, Sedum takesimense Nakai and Campanula takesimana Nakai, using archaeal and bacterial 16S rRNA gene amplicon profiling, and assessed relationships between environmental factors and microbial community composition. We identified 390 bacterial genera, including known plant-associated genera such as Pseudomonas, Flavobacterium, Bradyrhizobium and Rhizobium, and uncharacterized clades such as DA101 that might be important in root-associated microbial communities in bulk soil. Unexpectedly, Nitrososphaera clade members were abundant, indicating functional association with roots. Soil texture/type has a greater impact on microbial community composition in rhizocompartments than chemical factors. Our results provide fundamental knowledge on microbial diversity, community and correlations with environmental factors, and expand our understanding of the microbiota in rhizocompartments of native plants.

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