Journal of Microbiology

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

71 View
0 Download
2 Web of Science
3 Crossref

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.

Citations

Citations to this article as recorded by

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; : 107154. CrossRef

Genomic Characterization and Comparative Analysis of Streptococcus zhangguiae sp. nov. Isolated from the Respiratory Tract of Marmota Himalayana: Caixin Yang, Jiajia Ma, Huimin Zhou, Jing Yang, Ji Pu, Shan Lu, Dong Jin, Liyun Liu, Kui Dong, Jianguo Xu; J. Microbiol. 2024;62(11):951-963. Published online November 4, 2024; DOI: https://doi.org/10.1007/s12275-024-00177-2

85 View
0 Download

Abstract: Two Gram-stain-positive, oxidase-negative, non-motile, facultative anaerobic, α-hemolytic, coccus-shaped bacteria (zg-86^T and zg-70) were isolated from the respiratory tracts of marmots (Marmota Himalayana) on the Qinghai-Tibet Plateau of China. Phylogenetic analysis of the 16S rRNA gene and 545 core genes revealed that these two strains belong to the Streptococcus genus. These strains were most closely related to Streptococcus respiraculi HTS25^T, Streptococcus cuniculi CCUG 65085^T, and Streptococcus marmotae HTS5^T. The average nucleotide identity (ANI) and digital DNA‒DNA hybridization (dDDH) were below the threshold for species delineation. The predominant cellular fatty acids (CFAs) in this novel species were C_16:0, C_18:0, and C_18:1ω9c, whereas the primary polar lipids were phosphatidylglycerol (PG), phosphatidylethanolamine (PE) and an unknown phosphoglycolipid (PGL). The optimal growth conditions for the strains were 37 °C, pH 7.0, and 0.5% (w/v) NaCl on brain-heart infusion (BHI) agar supplemented with 5% defibrinated sheep blood. Comparative genomics analyses revealed the potential pathogenicity of strain zg-86^T through comparisons with suis subclade strains in terms of virulence factors, pathogen-host interactions (PHIs) and mobile genetic factors (MGEs). Based on the phenotypic characteristics and phylogenetic analyses, we propose that these two isolates represent novel species in the genus Streptococcus, for which the names Streptococcus zhangguiae sp. nov. (the type strain zg-86^T=GDMCC 1.1758^T=JCM 34273^T) is proposed.

Review

Extensive Genomic Rearrangement of Catalase-Less Cyanobloom-Forming Microcystis aeruginosa in Freshwater Ecosystems: Minkyung Kim, Jaejoon Jung, Wonjae Kim, Yerim Park, Che Ok Jeon, Woojun Park; J. Microbiol. 2024;62(11):933-950. Published online October 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00172-7

113 View
0 Download

Abstract: Many of the world's freshwater ecosystems suffer from cyanobacteria-mediated blooms and their toxins. However, a mechanistic understanding of why and how Microcystis aeruginosa dominates over other freshwater cyanobacteria during warmer summers is lacking. This paper utilizes comparative genomics with other cyanobacteria and literature reviews to predict the gene functions and genomic architectures of M. aeruginosa based on complete genomes. The primary aim is to understand this species' survival and competitive strategies in warmer freshwater environments. M. aeruginosa strains exhibiting a high proportion of insertion sequences (~ 11%) possess genomic structures with low synteny across different strains. This indicates the occurrence of extensive genomic rearrangements and the presence of many possible diverse genotypes that result in greater population heterogeneities than those in other cyanobacteria in order to increase survivability during rapidly changing and threatening environmental challenges. Catalase-less M. aeruginosa strains are even vulnerable to low light intensity in freshwater environments with strong ultraviolet radiation. However, they can continuously grow with the help of various defense genes (e.g., egtBD, cruA, and mysABCD) and associated bacteria. The strong defense strategies against biological threats (e.g., antagonistic bacteria, protozoa, and cyanophages) are attributed to dense exopolysaccharide (EPS)-mediated aggregate formation with efficient buoyancy and the secondary metabolites of M. aeruginosa cells. Our review with extensive genome analysis suggests that the ecological vulnerability of M. aeruginosa cells can be overcome by diverse genotypes, secondary defense metabolites, reinforced EPS, and associated bacteria.

Journal Articles

Saxibacter everestensis gen. nov., sp. nov., A Novel Member of the Family Brevibacteriaceae, Isolated from the North Slope of Mount Everest: Mao Tian, Shiyu Wu, Wei Zhang, Gaosen Zhang, Xue Yu, Yujie Wu, Puchao Jia, Binglin Zhang, Tuo Chen, Guangxiu Liu; J. Microbiol. 2024;62(4):277-284. Published online March 6, 2024; DOI: https://doi.org/10.1007/s12275-024-00108-1

74 View
0 Download

Abstract: We isolated and analyzed a novel, Gram-stain-positive, aerobic, rod-shaped, non-motile actinobacterium, designated as strain ZFBP1038(T), from rock sampled on the north slope of Mount Everest. The growth requirements of this strain were 10-37 °C, pH 4-10, and 0-6% (w/v) NaCl. The sole respiratory quinone was MK-9, and the major fatty acids were anteiso-C(15:0) and iso-C(17:0). Peptidoglycan containing meso-diaminopimelic acid, ribose, and glucose were the major cell wall sugars, while polar lipids included diphosphatidyl glycerol, phosphatidyl glycerol, an unidentified phospholipid, and an unidentified glycolipid. A phylogenetic analysis based on 16S rRNA gene sequences showed that strain ZFBP1038(T) has the highest similarity with Spelaeicoccus albus DSM 26341( T) (96.02%). ZFBP1038(T) formed a distinct monophyletic clade within the family Brevibacteriaceae and was distantly related to the genus Spelaeicoccus. The G + C content of strain ZFBP1038(T) was 63.65 mol% and the genome size was 4.05 Mb. Digital DNA-DNA hybridization, average nucleotide identity, and average amino acid identity values between the genomes of strain ZFBP1038(T) and representative reference strains were 19.3-25.2, 68.0-71.0, and 52.8-60.1%, respectively. Phylogenetic, phenotypic, and chemotaxonomic characteristics as well as comparative genome analyses suggested that strain ZFBP1038(T) represents a novel species of a new genus, for which the name Saxibacter gen. nov., sp. nov. was assigned with the type strain Saxibacter everestensis ZFBP1038(T) (= EE 014( T) = GDMCC 1.3024( T) = JCM 35335( T)).

Impact of Elevational Gradients and Chemical Parameters on Changes in Soil Bacterial Diversity Under Semiarid Mountain Region: Salman Khan , Chun Han , Awais Iqbal , Chao Guan , Changming Zhao; J. Microbiol. 2023;61(10):903-915. Published online November 23, 2023; DOI: https://doi.org/10.1007/s12275-023-00085-x

52 View
0 Download

Abstract: Elevation gradients, often regarded as “natural experiments or laboratories”, can be used to study changes in the distribution of microbial diversity related to changes in environmental conditions that typically occur over small geographical scales. We obtained bacterial sequences using MiSeq sequencing and clustered them into operational taxonomic units (OTUs). The total number of reads obtained by the bacterial 16S rRNA sequencing analysis was 1,090,555, with an average of approximately 45,439 reads per sample collected from various elevations. The current study observed inconsistent bacterial diversity patterns in samples from the lowest to highest elevations. 983 OTUs were found common among all the elevations. The most unique OTUs were found in the soil sample from elevation_2, followed by elevation_1. Soil sample collected at elevation_6 had the least unique OTUs. Actinobacteria, Protobacteria, Chloroflexi were found most abundant bacterial phyla in current study. Ammonium nitrogen ( NH4 +-N), and total phosphate (TP) are the main factors influencing bacterial diversity at elevations_ 1. pH was the main factor influencing the bacterial diversity at elevations_2, elevation_3 and elevation_4. Our results provide new visions on forming and maintaining soil microbial diversity along an elevational gradient and have implications for microbial responses to environmental change in semiarid mountain ecosystems.

Quantitative Analysis of RNA Polymerase Slippages for Production of P3N‑PIPO Trans‑frame Fusion Proteins in Potyvirids: Dongjin Choi , Yoonsoo Hahn; J. Microbiol. 2023;61(10):917-927. Published online October 16, 2023; DOI: https://doi.org/10.1007/s12275-023-00083-z

68 View
0 Download
3 Web of Science
3 Crossref

Abstract

Potyvirids, members of the family Potyviridae, produce the P3N-PIPO protein, which is crucial for the cell-to-cell transport of viral genomic RNAs. The production of P3N-PIPO requires an adenine (A) insertion caused by RNA polymerase slippage at a conserved GAA AAA A ( GA6) sequence preceding the PIPO open reading frame. Presently, the slippage rate of RNA polymerase has been estimated in only a few potyvirids, ranging from 0.8 to 2.1%. In this study, we analyzed publicly available plant RNA-seq data and identified 19 genome contigs from 13 distinct potyvirids. We further investigated the RNA polymerase slippage rates at the GA6 motif. Our analysis revealed that the frequency of the A insertion variant ranges from 0.53 to 4.07% in 11 potyviruses (genus Potyvirus). For the two macluraviruses (genus Macluravirus), the frequency of the A insertion variant was found to be 0.72% and 10.96% respectively. Notably, the estimated RNA polymerase slippage rates for 12 out of the 13 investigated potyvirids were reported for the first time in this study. Our findings underscore the value of plant RNA-seq data for quantitative analysis of potyvirid genome variants, specifically at the GA6 slippage site, and contribute to a more comprehensive understanding of the RNA polymerase slippage phenomenon in potyvirids.

Citations

Citations to this article as recorded by

Discovery of novel tepovirus genomes with a nucleic acid-binding protein homolog by systematic analysis of plant transcriptome data
Dongjin Choi, Hyerin Park, Seungwoo Baek, Myeung Seok Choi, Sylvain Legay, Gea Guerriero, Jean-François Hausman, Yoonsoo Hahn
Acta Virologica.2025;[Epub] CrossRef
Potyviral Helper-Component Protease: Multifaced Functions and Interactions with Host Proteins
Veronika Hýsková, Kateřina Bělonožníková, Josef Chmelík, Hana Hoffmeisterová, Noemi Čeřovská, Tomáš Moravec, Helena Ryšlavá
Plants.2024; 13(9): 1236. CrossRef
Reconceptualizing transcriptional slippage in plant RNA viruses
Adrian A. Valli, María Luisa Domingo-Calap, Alfonso González de Prádena, Juan Antonio García, Hongguang Cui, Cécile Desbiez, Juan José López-Moya, Shou-Wei Ding, Andrew Firth
mBio.2024;[Epub] CrossRef

Development of a Novel D‑Lactic Acid Production Platform Based on Lactobacillus saerimneri TBRC 5746: Kitisak Sansatchanon , Pipat Sudying , Peerada Promdonkoy , Yutthana Kingcha , Wonnop Visessanguan , Sutipa Tanapongpipat , Weerawat Runguphan , Kanokarn Kocharin; J. Microbiol. 2023;61(9):853-863. Published online September 14, 2023; DOI: https://doi.org/10.1007/s12275-023-00077-x

59 View
0 Download
4 Web of Science
4 Crossref

Abstract

D-Lactic acid is a chiral, three-carbon organic acid, that bolsters the thermostability of polylactic acid. In this study, we developed a microbial production platform for the high-titer production of D-lactic acid. We screened 600 isolates of lactic acid bacteria (LAB) and identified twelve strains that exclusively produced D-lactic acid in high titers. Of these strains, Lactobacillus saerimneri TBRC 5746 was selected for further development because of its homofermentative metabolism. We investigated the effects of high temperature and the use of cheap, renewable carbon sources on lactic acid production and observed a titer of 99.4 g/L and a yield of 0.90 g/g glucose (90% of the theoretical yield). However, we also observed L-lactic acid production, which reduced the product’s optical purity. We then used CRISPR/dCas9-assisted transcriptional repression to repress the two Lldh genes in the genome of L. saerimneri TBRC 5746, resulting in a 38% increase in D-lactic acid production and an improvement in optical purity. This is the first demonstration of CRISPR/dCas9-assisted transcriptional repression in this microbial host and represents progress toward efficient microbial production of D-lactic acid.

Citations

Citations to this article as recorded by

Industrial–scale production of various bio–commodities by engineered microbial cell factories: Strategies of engineering in microbial robustness
Ju-Hyeong Jung, Vinoth Kumar Ponnusamy, Gopalakrishnan Kumar, Bartłomiej Igliński, Vinod Kumar, Grzegorz Piechota
Chemical Engineering Journal.2024; 502: 157679. CrossRef
Microbial Cell Factories: Biodiversity, Pathway Construction, Robustness, and Industrial Applicability
Rida Chaudhary, Ali Nawaz, Mireille Fouillaud, Laurent Dufossé, Ikram ul Haq, Hamid Mukhtar
Microbiology Research.2024; 15(1): 247. CrossRef
Adaptive Evolution for the Efficient Production of High-Quality d-Lactic Acid Using Engineered Klebsiella pneumoniae
Bo Jiang, Jiezheng Liu, Jingnan Wang, Guang Zhao, Zhe Zhao
Microorganisms.2024; 12(6): 1167. CrossRef
Enhancing D-lactic acid production from non-detoxified corn stover hydrolysate via innovative F127-IEA hydrogel-mediated immobilization of Lactobacillus bulgaricus T15
Yuhan Zheng, Feiyang Sun, Siyi Liu, Gang Wang, Huan Chen, Yongxin Guo, Xiufeng Wang, Maia Lia Escobar Bonora, Sitong Zhang, Yanli Li, Guang Chen
Frontiers in Microbiology.2024;[Epub] CrossRef

Metformin Regulates Gut Microbiota Abundance to Suppress M2 Skewing of Macrophages and Colorectal Tumorigenesis in Mice: Linfeng Fan , Xiangfu Zeng , Guofeng Xu; J. Microbiol. 2023;61(1):109-120. Published online January 26, 2023; DOI: https://doi.org/10.1007/s12275-022-00010-8

76 View
0 Download
5 Web of Science
4 Crossref

Abstract

The correlation of imbalanced gut microbiota with the onset and progression of colorectal cancer (CRC) has become clear. This work investigates the effect of metformin on gut microbiota and genesis of CRC in mice. Human fecal samples were collected from healthy control (HC) donors and CRC patients. Compared to HC donors, CRC patients had reduced abundance of gut microbiota; however, they had increased abundance of detrimental Bacteroidetes. Mice were injected with azomethane (AOM) to induce colorectal tumorigenesis models. Treatment of CRC patients-sourced fecal microbiota promoted tumorigenesis, and it increased the expression of Ki67, β-catenin, COX-2, and Cyclin D1 in mouse colon tissues. Further treatment of metformin blocked the colorectal tumorigenesis in mice. Fecal microbiota from the metformin-treated mice was collected, which showed decreased Bacteroidetes abundance and suppressed AOM-induced colorectal tumorigenesis in mice as well. Moreover, the metformin- modified microbiota promoted the M1 macrophage-related markers IL-6 and iNOS but suppressed the M2 macrophage-related markers IL-4R and Arg1 in mouse colon tissues. In conclusion, this study suggests that metformin-mediated gut microbiota alteration suppresses macrophage M2 polarization to block colorectal tumorigenesis.

Citations

Citations to this article as recorded by

Metformin alleviates colitis-associated colorectal cancer via inhibition of the TLR4/MyD88/NFκB/MAPK pathway and macrophage M2 polarization
Xueying Lai, Bin Liu, Yu Wan, Ping Zhou, Wanjun Li, Wei Hu, Wei Gong
International Immunopharmacology.2025; 144: 113683. CrossRef
Metformin as an immunomodulatory agent in enhancing head and neck squamous cell carcinoma therapies
Wenting Li, Nanshu Liu, Mingwei Chen, Dongjuan Liu, Sai Liu
Biochimica et Biophysica Acta (BBA) - Reviews on Cancer.2025; 1880(2): 189262. CrossRef
Clinical efficacy of metformin in familial adenomatous polyposis and the effect of intestinal flora
Linxin Zhou, Linfu Zheng, Binbin Xu, Zhou Ye, Dazhou Li, Wen Wang
Orphanet Journal of Rare Diseases.2024;[Epub] CrossRef
An AMPK agonist suppresses the progress of colorectal cancer by regulating the polarization of TAM to M1 through inhibition of HIF-1α and mTOR signal pathway
Yuanyuan Cao, Mingyi Wo, Chan Xu, Xianming Fei, Juan Jin, Zhiming Shan
Journal of Cancer Research and Therapeutics.2023; 19(6): 1560. CrossRef

Characteristic alterations of gut microbiota in uncontrolled gout: Asad ul-Haq , Kyung-Ann Lee , Hoonhee Seo , Sukyung Kim , Sujin Jo , Kyung Min Ko , Su-Jin Moon , Yun Sung Kim , Jung Ran Choi , Ho-Yeon Song , Hyun-Sook Kim; J. Microbiol. 2022;60(12):1178-1190. Published online November 24, 2022; DOI: https://doi.org/10.1007/s12275-022-2416-1

64 View
0 Download
10 Web of Science
11 Crossref

Abstract

Microbiome research has been on the rise recently for a more in-depth understanding of gout. Meanwhile, there is a need to understand the gut microbiome related to uric acid-lowering drug resistance. In this study, 16S rRNA gene-based microbiota analysis was performed for a total of 65 stool samples from 17 healthy controls and 48 febuxostat-treated gout patients (including 28 controlled subjects with decreased uric acid levels and 20 uncontrolled subjects with non-reduced uric acid levels). Alpha diversity of bacterial community decreased in the healthy control, controlled, and uncontrolled groups. In the case of beta diversity, the bacterial community was significantly different among groups (healthy control, controlled, and uncontrolled groups). Taxonomic biomarker analysis revealed the increased population of g-Bifidobacterium in healthy controls and g-Prevotella in uncontrolled patients. PCR further confirmed this result at the species level. Additionally, functional metagenomics predictions led to the exploration of various functional biomarkers, including purine metabolism. The results of this study can serve as a basis for developing potential new strategies for diagnosing and treating gout from microbiome prospects.

Citations

Citations to this article as recorded by

Different Prostatic Tissue Microbiomes between High- and Low-Grade Prostate Cancer Pathogenesis
Jae Heon Kim, Hoonhee Seo, Sukyung Kim, Md Abdur Rahim, Sujin Jo, Indrajeet Barman, Hanieh Tajdozian, Faezeh Sarafraz, Ho-Yeon Song, Yun Seob Song
International Journal of Molecular Sciences.2024; 25(16): 8943. CrossRef
Reassessing Gout Management through the Lens of Gut Microbiota
Jean Demarquoy, Oumaima Dehmej
Applied Microbiology.2024; 4(2): 824. CrossRef
Changes in gut microbiota structure and function in gout patients
Feiyan Zhao, Zhixin Zhao, Dafu Man, Zhihong Sun, Ning Tie, Hongbin Li, Heping Zhang
Food Bioscience.2023; 54: 102912. CrossRef
Effect of a Novel Handheld Photobiomodulation Therapy Device in the Management of Chemoradiation Therapy-Induced Oral Mucositis in Head and Neck Cancer Patients: A Case Series Study
In-Young Jo, Hyung-Kwon Byeon, Myung-Jin Ban, Jae-Hong Park, Sang-Cheol Lee, Yong Kyun Won, Yun-Su Eun, Jae-Yun Kim, Na-Gyeong Yang, Sul-Hee Lee, Pyeongan Lee, Nam-Hun Heo, Sujin Jo, Hoonhee Seo, Sukyung Kim, Ho-Yeon Song, Jung-Eun Kim
Photonics.2023; 10(3): 241. CrossRef
New drug targets for the treatment of gout arthritis: what’s new?
Tiago H. Zaninelli, Geovana Martelossi-Cebinelli, Telma Saraiva-Santos, Sergio M. Borghi, Victor Fattori, Rubia Casagrande, Waldiceu A. Verri
Expert Opinion on Therapeutic Targets.2023; 27(8): 679. CrossRef
A dynamics association study of gut barrier and microbiota in hyperuricemia
Qiulan Lv, Jun Zhou, Changyao Wang, Xiaomin Yang, Yafei Han, Quan Zhou, Ruyong Yao, Aihua Sui
Frontiers in Microbiology.2023;[Epub] CrossRef
Biochemical Recurrence in Prostate Cancer Is Associated with the Composition of Lactobacillus: Microbiome Analysis of Prostatic Tissue
Jae Heon Kim, Hoonhee Seo, Sukyung Kim, Asad Ul-Haq, Md Abdur Rahim, Sujin Jo, Ho-Yeon Song, Yun Seob Song
International Journal of Molecular Sciences.2023; 24(13): 10423. CrossRef
Remote effects of kidney drug transporter OAT1 on gut microbiome composition and urate homeostasis
Vladimir S. Ermakov, Jeffry C. Granados, Sanjay K. Nigam
JCI Insight.2023;[Epub] CrossRef
Causal Relationship between Gut Microbiota and Gout: A Two-Sample Mendelian Randomization Study
Mengna Wang, Jiayao Fan, Zhaohui Huang, Dan Zhou, Xue Wang
Nutrients.2023; 15(19): 4260. CrossRef
Emerging Urate-Lowering Drugs and Pharmacologic Treatment Strategies for Gout: A Narrative Review
Robert Terkeltaub
Drugs.2023; 83(16): 1501. CrossRef
Characterization of Fecal Microbiomes of Osteoporotic Patients in Korea
Asad Ul-Haq, Hoonhee Seo, Sujin Jo, Hyuna Park, Sukyung Kim, Youngkyoung Lee, Saebim Lee, Je Hoon Jeong, Ho‑Yeon Song
Polish Journal of Microbiology.2022; 71(4): 601. 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

66 View
0 Download
5 Web of Science
5 Crossref

Abstract

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.

Citations

Citations to this article as recorded by

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;[Epub] 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

Description of Polaribacter batillariae sp. nov., Polaribacter cellanae sp. nov., and Polaribacter pectinis sp. nov., novel bacteria isolated from the gut of three types of South Korean shellfish: Su-Won Jeong , Jeong Eun Han , June-Young Lee , Ji-Ho Yoo , Do-Yeon Kim , In Chul Jeong , Jee-Won Choi , Yun-Seok Jeong , Jae-Yun Lee , So-Yeon Lee , Euon Jung Tak , Hojun Sung , Hyun Sik Kim , Pil Soo Kim , Dong-Wook Hyun , Jin-Woo Bae; J. Microbiol. 2022;60(6):576-584. Published online April 18, 2022; DOI: https://doi.org/10.1007/s12275-022-1604-3

71 View
0 Download
6 Web of Science
7 Crossref

Abstract

Three aerobic, Gram-negative, and rod-shaped bacterial strains, designated strains G4M1T, SM13T, and L12M9T, were isolated from the gut of Batillaria multiformis, Cellana toreuma, and Patinopecten yessoensis collected from the Yellow Sea in South Korea. All the strains grew optimally at 25°C, in the presence of 2% (w/v) NaCl, and at pH 7. These three strains, which belonged to the genus Polaribacter in the family Flavobacteriaceae, shared < 98.8% in 16S rRNA gene sequence and < 86.68% in whole-genome sequence with each other. Compared with the type strains of Polaribacter, isolates showed the highest sequence similarity to P. haliotis KCTC 52418T (< 98.68%), followed by P. litorisediminis KCTC 52500T (< 98.13%). All the strains contained MK-6 as their predominant menaquinone and iso-C15:0 as their major fatty acid. Moreover, all the strains had phosphatidylethanolamine as their polar lipid component. In addition, strain G4M1T had two unidentified lipids and three unidentified aminolipids, strain SM13T had three unidentified lipids and three unidentified aminolipids, and strain L12M9T had three unidentified lipids and one unidentified aminolipid. The DNA G + C contents of strains G4M1T, SM13T, and L12M9T were 31.0, 30.4, and 29.7 mol%, respectively. Based on phenotypic, phylogenetic, chemotaxonomic, and genotypic findings, strains G4M1T (= KCTC 82388T = DSM 112372T), SM13T (= KCTC 82389T = DSM 112373T), and L12M9T (= KCTC 62751T = DSM 112374T) were classified into the genus Polaribacter as the type strains of novel species, for which the names Polaribacter batillariae sp. nov., Polaribacter cellanae sp. nov., and Polaribacter pectinis sp. nov., respectively, have been proposed.

Citations

Citations to this article as recorded by

Polaribacter uvawellassae sp. nov., a Member of the Family Flavobacteriaceae Isolated from Mud Crab (Scylla serrata)
W. M. Lakshani Anuradha Wanasinghe, Wang Xin, Yuan Siliang, Dongru Qiu
Current Microbiology.2025;[Epub] CrossRef
Unique skin microbiome: insights to understanding bacterial symbionts in octopuses
Chelsea O. Bennice, Lauren E. Krausfeldt, W. Randy Brooks, Jose V. Lopez
Frontiers in Marine Science.2024;[Epub] CrossRef
An update on novel taxa and revised taxonomic status of bacteria isolated from aquatic host species described in 2022–2023
Claire R. Burbick, Sara D. Lawhon, Brittany Bukouras, Giovanna Lazzerini, Erik Munson, Romney M. Humphries
Journal of Clinical Microbiology.2024;[Epub] CrossRef
Polaribacter ponticola sp. nov., isolated from seawater, reclassification of Polaribacter undariae as a later heterotypic synonym of Polaribacter sejongensis, and emended description of Polaribacter sejongensis Kim et al. 2013
Ju Hye Baek, Mahrukh Butt, Dong Min Han, Jeong Min Kim, Seohui Choi, Che Ok Jeon
International Journal of Systematic and Evolutionary Microbiology .2024;[Epub] CrossRef
Rhodobacteraceae are Prevalent and Ecologically Crucial Bacterial Members in Marine Biofloc Aquaculture
Meora Rajeev, Jang-Cheon Cho
Journal of Microbiology.2024; 62(11): 985. CrossRef
Validation List no. 207. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, George Garrity
International Journal of Systematic and Evolutionary Microbiology .2022;[Epub] CrossRef
Nocardioides palaemonis sp. nov. and Tessaracoccus palaemonis sp. nov., isolated from the gastrointestinal tract of lake prawn
Do-Yeon Kim, In-Chul Jeong, So-Yeon Lee, Yun-Seok Jeong, Jeong Eun Han, Euon Jung Tak, June-Young Lee, Pil Soo Kim, Dong-Wook Hyun, Jin-Woo Bae
International Journal of Systematic and Evolutionary Microbiology .2022;[Epub] CrossRef

Antiviral effects of human placenta hydrolysate (Laennec) against SARS-CoV-2 in vitro and in the ferret model: Eun-Ha Kim , Young-il Kim , Seung-Gyu Jang , Minju Im , Kyeongsoo Jeong , Young Ki Choi , Hae-Jung Han; J. Microbiol. 2021;59(11):1056-1062. Published online October 6, 2021; DOI: https://doi.org/10.1007/s12275-021-1367-2

55 View
0 Download
7 Web of Science
7 Crossref

Abstract

The COVID-19 pandemic has caused unprecedented health, social, and economic crises worldwide. However, to date, there is an only a limited effective treatment for this disease. Human placenta hydrolysate (hPH) has previously been shown to be safe and to improve the health condition in patients with hyperferritinemia and COVID-19. In this study, we aimed to determine the antiviral effects of hPH against SARS-CoV-2 in vitro and in vivo models and compared with Remdesivir, an FDA-approved drug for COVID-19 treatment. To assess whether hPH inhibited SARS-CoV-2 replication, we determined the CC50, EC50, and selective index (SI) in Vero cells by infection with a SARS-CoV-2 at an MOI of 0.01. Further, groups of ferrets infected with 105.8 TCID50/ml of SARS-CoV-2 and treated with hPH at 2, 4, 6 dpi, and compared their clinical manifestation and virus titers in respiratory tracts with PBS control-treated group. The mRNA expression of immunerelated cytokines was determined by qRT-PCR. hPH treatment attenuated virus replication in a dose-dependent manner in vitro. In a ferret infection study, treatment with hPH resulted in minimal bodyweight loss and attenuated virus replication in the nasal wash, turbinates, and lungs of infected ferrets. In addition, qRT-PCR results revealed that the hPH treatment remarkably upregulated the gene expression of type I (IFN-α and IFN-β) and II (IFN-γ) IFNs in SARS-CoV-2 infected ferrets. Our data collectively suggest that hPH has antiviral efficacy against SARS-CoV-2 and might be a promising therapeutic agent for the treatment of SARS-CoV-2 infection.

Citations

Citations to this article as recorded by

Perinatal Hypoxia and Immune System Activation in Schizophrenia Pathogenesis: Critical Considerations During COVID-19 Pandemic
I Kawikova, K Hakenova, M Lebedeva, L Kleteckova, L Jakob, V Spicka, L Wen, F Spaniel, K Vales
Physiological Research.2024; : S615. CrossRef
Human Placenta Extract (HPH) Suppresses Inflammatory Responses in TNF-α/IFN-γ-Stimulated HaCaT Cells and a DNCB Atopic Dermatitis (AD)-Like Mouse Model
Jung Ok Lee, Youna Jang, A Yeon Park, Jung Min Lee, Kyeongsoo Jeong, So-Hyun Jeon, Hui Jin, Minju Im, Jae-Won Kim, Beom Joon Kim
Journal of Microbiology and Biotechnology.2024; 34(10): 1969. CrossRef
Systematic analysis of the pharmacology of standardized extracts of human placenta
T. E. Bogacheva, I. Yu. Torshin, O. A. Gromova
Pharmacokinetics and Pharmacodynamics.2024; (4): 3. CrossRef
Distinctive Combinations of RBD Mutations Contribute to Antibody Evasion in the Case of the SARS-CoV-2 Beta Variant
Tae-Hun Kim, Sojung Bae, Sunggeun Goo, Jinjong Myoung
Journal of Microbiology and Biotechnology.2023; 33(12): 1587. CrossRef
Current state-of-the-art and potential future therapeutic drugs against COVID-19
Ailong Sha, Yi Liu, Haiyan Hao
Frontiers in Cell and Developmental Biology.2023;[Epub] CrossRef
SARS-CoV-2 Aerosol and Intranasal Exposure Models in Ferrets
Elizabeth E. Zumbrun, Samantha E. Zak, Eric D. Lee, Philip A. Bowling, Sara I. Ruiz, Xiankun Zeng, Jeffrey W. Koehler, Korey L. Delp, Russel R. Bakken, Shannon S. Hentschel, Holly A. Bloomfield, Keersten M. Ricks, Tamara L. Clements, April M. Babka, John
Viruses.2023; 15(12): 2341. CrossRef
Human placenta hydrolysates: from V.P. Filatov to the present day: Review
Olga A. Gromova, Ivan Yu. Torshin, Alexander G. Chuchalin, Valeriy А. Maximov
Terapevticheskii arkhiv.2022; 94(3): 434. CrossRef

Salicibibacter cibarius sp. nov. and Salicibibacter cibi sp. nov., two novel species of the family Bacillaceae isolated from kimchi: Young Joon Oh , Joon Yong Kim , Seul Ki Lim , Min-Sung Kwon , Hak-Jong Choi; J. Microbiol. 2021;59(5):460-466. Published online April 28, 2021; DOI: https://doi.org/10.1007/s12275-021-0513-1

57 View
0 Download
1 Web of Science
1 Crossref

Abstract

To date, all species in the genus Salicibibacter have been isolated in Korean commercial kimchi. We aimed to describe the taxonomic characteristics of two strains, NKC5-3T and NKC21-4T, isolated from commercial kimchi collected from various regions in the Republic of Korea. Cells of these strains were rod-shaped, Gram-positive, aerobic, oxidase- and catalase- positive, non-motile, halophilic, and alkalitolerant. Both strains, unlike other species of the genus Salicibibacter, could not grow without NaCl. Strains NKC5-3T and NKC21-4T could tolerate up to 25.0% (w/v) NaCl (optimum 10%) and grow at pH 7.0–10.0 (optimum 8.5) and 8.0–9.0 (optimum 8.5), respectively; they showed 97.1% 16S rRNA gene sequence similarity to each other and were most closely related to S. kimchii NKC1-1T (97.0% and 96.8% similarity, respectively). The genome of strain NKC5-3T was nearly 4.6 Mb in size, with 4,456 protein-coding sequences (CDSs), whereas NKC21-4T genome was nearly 3.9 Mb in size, with 3,717 CDSs. OrthoANI values between the novel strains and S. kimchii NKC1-1T were far lower than the species demarcation threshold. NKC5-3T and NKC21-4T clustered together to form branches that were distinct from the other Salicibibacter species. The major fatty acids in these strains were anteiso-C15:0 and anteiso-C17:0, and the predominant menaquinone was menaquinone-7. The polar lipids of NKC5-3T included diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), and five unidentified phospholipids (PL), and those of NKC21-4T included DPG, PG, seven unidentified PLs, and an unidentified lipid. Both isolates had DPG, which is the first case in the genus Salicibibacter. The genomic G + C content of strains NKC5-3T and NKC21-4T was 44.7 and 44.9 mol%, respectively. Based on phenotypic, genomic, phylogenetic, and chemotaxonomic analyses, strains NKC5-3T (= KACC 22040T = DSM 111417T) and NKC21-4T (= KACC 22041T = DSM 111418T) represent two novel species of the genus Salicibibacter, for which the names Salicibibacter cibarius sp. nov. and Salicibibacter cibi sp. nov. are proposed.

Citations

Citations to this article as recorded by

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 .2021;[Epub] CrossRef

Effects of mycosubtilin homolog algicides from a marine bacterium, Bacillus sp. SY-1, against the harmful algal bloom species Cochlodinium polykrikoides: Seong-Yun Jeong , Hong-Joo Son; J. Microbiol. 2021;59(4):389-400. Published online March 29, 2021; DOI: https://doi.org/10.1007/s12275-021-1086-8

53 View
0 Download
16 Web of Science
11 Crossref

Abstract

The marine bacterium, Bacillus sp. SY-1, produced algicidal compounds that are notably active against the bloom-forming alga Cochlodinium polykrikoides. We isolated three algicidal compounds and identified these as mycosubtilins with molecular weights of 1056, 1070, and 1084 (designated MS 1056, 1070, and 1084, respectively), based on amino acid analyses and 1H, 13C, and two-dimensional nuclear magnetic resonance spectroscopy, including 1H-15N heteronuclear multiple bond correlation analysis. MS 1056 contains a β- amino acid residue with an alkyl side chain of C15, which has not previously been seen in known mycosubtilin families. MS 1056, 1070, and 1084 showed algicidal activities against C. polykrikoides with 6-h LC50 values of 2.3 ± 0.4, 0.8 ± 0.2, and 0.6 ± 0.1 μg/ml, respectively. These compounds also showed significant algicidal activities against other harmful algal bloom species. In contrast, MS 1084 showed no significant growth inhibitory effects against other organisms, including bacteria and microalgae, although does inhibit the growth of some fungi and yeasts. These observations imply that the algicidal bacterium Bacillus sp. SY-1 and its algicidal compounds could play an important role in regulating the onset and development of harmful algal blooms in natural environments.

Citations

Citations to this article as recorded by

Biological and Chemical Approaches for Controlling Harmful Microcystis Blooms
Wonjae Kim, Yerim Park, Jaejoon Jung, Che Ok Jeon, Masanori Toyofuku, Jiyoung Lee, Woojun Park
Journal of Microbiology.2024; 62(3): 249. CrossRef
A Bacillus subtilis strain with efficient algaecide of Microcystis aeruginosa and degradation of microcystins
Yuanyuan Chen, Fei Xiong, Ying Zhu, Dongdong Zhai, Hongyan Liu, Lin Zhang, Ming Xia
Frontiers in Microbiology.2024;[Epub] CrossRef
Dinoflagellate–Bacteria Interactions: Physiology, Ecology, and Evolution
Xiaohong Yang, Zijian Liu, Yanwen Zhang, Xinguo Shi, Zhen Wu
Biology.2024; 13(8): 579. CrossRef
Transcriptomics‐guided identification of an algicidal protease of the marine bacterium Kordia algicida OT‐1
Kristy S. Syhapanha, David A. Russo, Yun Deng, Nils Meyer, Remington X. Poulin, Georg Pohnert
MicrobiologyOpen.2023;[Epub] CrossRef
Applications-oriented algicidal efficacy research and in-depth mechanism of a novel strain Brevibacillus sp. on Microcystis aeruginosa
Fen Liu, Lei Qin, Shunni Zhu, Huanjun Chen, Akram Ali Nasser Mansoor Al-Haimi, Jin Xu, Weizheng Zhou, Zhongming Wang
Environmental Pollution.2023; 330: 121812. CrossRef
Algicidal Potential of the Endosymbiont Bacterial Consortium of the Seagrasses Enhalus acoroides and Thalassia hemprichii
G I Setiabudi, I N D Prasetia, K L Antara, G S br. Sitepu, J M Amelia, M D K Maharani
IOP Conference Series: Earth and Environmental Science.2023; 1224(1): 012039. CrossRef
Algicidal substances of Brevibacillus laterosporus and their effect on red tide organisms
Shanshan Liu, Zhiming Yu, Zaixing Wu, Xihua Cao, Ruihong Cheng, Xiuxian Song
Frontiers in Marine Science.2023;[Epub] CrossRef
Algicidal activity of a novel bacterium, Qipengyuania sp. 3-20A1M, against harmful Margalefidinium polykrikoides: Effects of its active compound
So-Ra Ko, Ve Van Le, Ankita Srivastava, Mingyeong Kang, Hee-Mock Oh, Chi-Yong Ahn
Marine Pollution Bulletin.2023; 186: 114397. CrossRef
Review of Harmful Algal Blooms (HABs) Causing Marine Fish Kills: Toxicity and Mitigation
Jae-Wook Oh, Suraj Shiv Charan Pushparaj, Manikandan Muthu, Judy Gopal
Plants.2023; 12(23): 3936. CrossRef
Algicidal Bacteria: A Review of Current Knowledge and Applications to Control Harmful Algal Blooms
Kathryn J. Coyne, Yanfei Wang, Gretchen Johnson
Frontiers in Microbiology.2022;[Epub] CrossRef
Isolation, identification of algicidal bacteria and contrastive study on algicidal properties against Microcystis aeruginosa
Fen Liu, Shunni Zhu, Lei Qin, Pingzhong Feng, Jin Xu, Weizheng Zhou, Zhongming Wang
Biochemical Engineering Journal.2022; 185: 108525. CrossRef

The effect of the HRB linker of Newcastle disease virus fusion protein on the fusogenic activity: Yaqing Liu , Ying Liu , Yanan Huang , Hongling Wen , Li Zhao , Yanyan Song , Zhiyu Wang; J. Microbiol. 2021;59(5):513-521. Published online March 29, 2021; DOI: https://doi.org/10.1007/s12275-021-0539-4

57 View
0 Download
5 Web of Science
5 Crossref

Abstract

Newcastle disease, designated a class A disease of poultry by the Office international des epizooties (OIE), is an acute infection caused by Newcastle disease virus (NDV). The merging of the envelope of NDV with the membrane of a target host cell is the key step in the infection pathway, which is driven by the concerted action of two glycoproteins: haemagglutinin- neuraminidase (HN) and fusion (F) protein. When the HN protein binds to the host cell surface receptor, the F protein is activated to mediate fusion. The three-dimensional structure of the F protein has been reported to have low electron density between the DIII domain and the HRB domain, and this electron-poor region is defined as the HRB linker. To clarify the contributing role of the HRB linker in the NDV F protein-mediated fusion process, 6 single amino acid mutants were obtained by site-directed mutagenesis of the HRB linker. The expression of the mutants and their abilities to mediate fusion were analysed, and the key amino acids in the HRB linker were identified as L436, E439, I450, and S453, as they can modulate the fusion ability or expression of the active form to a certain extent. The data shed light on the crucial role of the F protein HRB linker in the acquisition of a normal fusogenic phenotype.

Citations

Citations to this article as recorded by

Evaluation of Newcastle disease virus LaSota strain attenuated by codon pair deoptimization of the HN and F genes for in ovo vaccination
Fatma Eldemery, Changbo Ou, Taejoong Kim, Stephen Spatz, John Dunn, Robert Silva, Qingzhong Yu
Veterinary Microbiology.2023; 277: 109625. CrossRef
Prevalence and Molecular Characterization of Bovine Parainfluenza Virus Type 3 in Cattle Herds in China
Yunxin Ren, Cheng Tang, Hua Yue
Animals.2023; 13(5): 793. CrossRef
Direct interaction of the molecular chaperone GRP78/BiP with the Newcastle disease virus hemagglutinin-neuraminidase protein plays a vital role in viral attachment to and infection of culture cells
Chenxin Han, Ziwei Xie, Yadi Lv, Dingxiang Liu, Ruiai Chen
Frontiers in Immunology.2023;[Epub] CrossRef
Adaptor complex-mediated trafficking of Newcastle disease virus fusion protein is regulated by the YLMY motif of its cytoplasmic tail
Yawen Bu, Qingyuan Teng, Delan Feng, Rong Liang, Haoran Wang, Xuehui Zhang, Xiao Li, Wenfeng Jia, Jia Xue, Ye Zhao, Guozhong Zhang
Virulence.2022; 13(1): 1849. CrossRef
YLMY Tyrosine Residue within the Cytoplasmic Tail of Newcastle Disease Virus Fusion Protein Regulates Its Surface Expression to Modulate Viral Budding and Pathogenicity
Yawen Bu, Qingyuan Teng, Delan Feng, Lu Sun, Jia Xue, Guozhong Zhang, Peter Pelka
Microbiology Spectrum.2021;[Epub] CrossRef

First
Prev
Page of 4
Next
Last

Search