Journal of Microbiology

Reviews

Microbiome-Mucosal Immunity Nexus: Driving Forces in Respiratory Disease Progression: Young Chae Park, Soo Yeon Choi, Yunah Cha, Hyeong Won Yoon, Young Min Son; J. Microbiol. 2024;62(9):709-725. Published online September 6, 2024; DOI: https://doi.org/10.1007/s12275-024-00167-4

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The importance of the complex interplay between the microbiome and mucosal immunity, particularly within the respiratory tract, has gained significant attention due to its potential implications for the severity and progression of lung diseases. Therefore, this review summarizes the specific interactions through which the respiratory tract-specific microbiome influences mucosal immunity and ultimately impacts respiratory health. Furthermore, we discuss how the microbiome affects mucosal immunity, considering tissue-specific variations, and its capacity in respiratory diseases containing asthma, chronic obstructive pulmonary disease, and lung cancer. Additionally, we investigate the external factors which affect the relationship between respiratory microbiome and mucosal immune responses. By exploring these intricate interactions, this review provides valuable insights into the potential for microbiome-based interventions to modulate mucosal immunity and alleviate the severity of respiratory diseases.

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The impact of environmental factors on respiratory tract microbiome and respiratory system diseases
Yutao Ge, Guo Tang, Yawen Fu, Peng Deng, Rong Yao
European Journal of Medical Research.2025;[Epub] CrossRef
Bacteria and fungi of the lung: allies or enemies?
Enrico Garaci, Marilena Pariano, Emilia Nunzi, Claudio Costantini, Marina Maria Bellet, Cinzia Antognelli, Matteo Antonio Russo, Luigina Romani
Frontiers in Pharmacology.2024;[Epub] CrossRef

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

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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Host-directed therapies modulating innate immunity against infection in hematologic malignancies
Qiong Wang, Kristján Hermannsson, Egill Másson, Peter Bergman, Guðmundur Hrafn Guðmundsson
Blood Reviews.2025; 70: 101255. CrossRef
Progress in the Identification and Design of Novel Antimicrobial Peptides Against Pathogenic Microorganisms
Shengwei Sun
Probiotics and Antimicrobial Proteins.2025; 17(2): 918. CrossRef
Comparison of naturalization mouse model setups uncover distinct effects on intestinal mucosa depending on microbial experience
Henriette Arnesen, Signe Birkeland, Harriet Stendahl, Klaus Neuhaus, David Masopust, Preben Boysen, Harald Carlsen
Discovery Immunology.2025;[Epub] CrossRef
Oral administration of LEAP2 enhances immunity against Edwardsiella tarda through regulation of gut bacterial community and metabolite in mudskipper
Ting-Fang Zhu, Hai-Peng Guo, Li Nie, Jiong Chen
Fish & Shellfish Immunology.2025; 158: 110128. CrossRef
Pharmacology of Intestinal Inflammation and Repair
Céline Deraison, Nathalie Vergnolle
Annual Review of Pharmacology and Toxicology .2025; 65(1): 301. CrossRef
Macrophages and Gut Barrier Function: Guardians of Gastrointestinal Health in Post-Inflammatory and Post-Infection Responses
Edward Xiangtai Meng, George Nicholas Verne, Qiqi Zhou
International Journal of Molecular Sciences.2024; 25(17): 9422. CrossRef
Host-Associated Microbiome
Woo Jun Sul
Journal of Microbiology.2024; 62(3): 135. CrossRef
Gut Microbiota as Emerging Players in the Development of Alcohol-Related Liver Disease
Wei Li, Wenkang Gao, Shengqi Yan, Ling Yang, Qingjing Zhu, Huikuan Chu
Biomedicines.2024; 13(1): 74. CrossRef

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

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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Lipid transfer protein VAS inhibits the hypersensitive response via reactive oxygen species signaling in Nicotiana benthamiana
Rina Koyama, Akira Suzuki, Kouhei Ohnishi, Yasufumi Hikichi, Akinori Kiba, Stefanie Ranf
Journal of Experimental Botany.2025; 76(4): 1285. CrossRef
Short-Term Fertilization with the Nitrogen-Fixing Bacterium (NFB) Kosakonia radicincitans GXGL-4A Agent Can Modify the Transcriptome Expression Profiling of Cucumber (Cucumis sativus L.) Root
Baoyun Feng, Erxing Wang, Yating Zhang, Lurong Xu, Yanwen Xue, Yunpeng Chen
Microorganisms.2025; 13(3): 506. CrossRef
Pharmacological effects and the related mechanism of scutellarin on inflammation-related diseases: a review
Yang Zhou, Chenlin Gu, Yan Zhu, Yuting Zhu, Yutong Chen, Li Shi, Yang Yang, Xin Lu, Hanqing Pang
Frontiers in Pharmacology.2024;[Epub] CrossRef
Rice E3 ubiquitin ligases: From key modulators of host immunity to potential breeding applications
Yuqing Yan, Hui Wang, Yan Bi, Fengming Song
Plant Communications.2024; 5(12): 101128. CrossRef
Host-Associated Microbiome
Woo Jun Sul
Journal of Microbiology.2024; 62(3): 135. CrossRef
The microbiome orchestrates contaminant low-dose phytostimulation
Evgenios Agathokleous, Edward J. Calabrese, Stavros D. Veresoglou
Trends in Plant Science.2024;[Epub] CrossRef

Journal Articles

Evaluation of Cyc1 protein stability in Acidithiobacillus ferrooxidans bacterium after E121D mutation by molecular dynamics simulation to improve electron transfer: Mahnaz Shojapour , Somayeh Farahmand , Faezeh Fatemi , Marzieh Dehghan Shasaltaneh; J. Microbiol. 2022;60(5):526-532. Published online March 14, 2022; DOI: https://doi.org/10.1007/s12275-022-1645-7

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Abstract

Cyc1 (Cytochrome c552) is a protein in the electron transport chain of the Acidithiobacillus ferrooxidans (Af) bacteria which obtain their energy from oxidation Fe2+ to Fe3+. The electrons are directed through Cyc2, RCY (rusticyanin), Cyc1, and Cox aa3 proteins to O2. Cyc1 protein consists of two chains, A and B. In the present study, a novel mutation (E121D) in the A chain of Cyc1 protein was selected due to electron receiving from Histidine 143 of RCY. Then, the changes performed in the E121D mutant were evaluated by MD simulations analyzes. Cyc1 and RCY proteins were docked by a Patchdock server. By E121D mutation, the connection between Zn 1388 of chain B and aspartate 121 of chain A weaken. Asp 121 gets farther from Zn 1388. Therefore, the aspartate gets closer to Cu 1156 of the RCY leading to the higher stability of the RCY/ Cyc1 complex. Further, an acidic residue (Glu121) becomes a more acidic residue (Asp121) and improves the electron transfer to Cyc1 protein. The results of RMSF analysis showed further ligand flexibility in mutation. This leads to fluctuation of the active site and increases redox potential at the mutation point and the speed of electron transfer. This study also predicts that in all respiratory chain proteins, electrons probably enter the first active site via glutamate and exit histidine in the second active site of each respiratory chain protein.

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Point mutation consideration in CcO protein of the electron transfer chain by MD simulation
Mahnaz Shojapour, Somayeh Farahmand
Journal of Molecular Graphics and Modelling.2022; 117: 108309. CrossRef

Vibrio vulnificus PlpA facilitates necrotic host cell death induced by the pore forming MARTX toxin: Changyi Cho , Sanghyeon Choi , Myung Hee Kim , Byoung Sik Kim; J. Microbiol. 2022;60(2):224-233. Published online February 1, 2022; DOI: https://doi.org/10.1007/s12275-022-1448-x

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Abstract

Opportunistic pathogen Vibrio vulnificus causes severe systemic infection in humans with high mortality. Although multiple exotoxins have been characterized in V. vulnificus, their interactions and potential synergistic roles in pathogen-induced host cell death have not been investigated previously. By employing a series of multiple exotoxin deletion mutants, we investigated whether specific exotoxins of the pathogen functioned together to achieve severe and rapid necrotic cell death. Human epithelial cells treated with V. vulnificus with a plpA deletion background exhibited an unusually prolonged cell blebbing, suggesting the importance of PlpA, a phospholipase A2, in rapid necrotic cell death by this pathogen. Additional deletion of the rtxA gene encoding the multifunctional autoprocessing repeats-in-toxin (MARTX) toxin did not result in necrotic cell blebs. However, if the rtxA gene was engineered to produce an effector-free MARTX toxin, the cell blebbing was observed, indicating that the pore forming activity of the MARTX toxin is sufficient, but the MARTX toxin effector domains are not necessary, for the blebbing. When a recombinant PlpA was treated on the blebbed cells, the blebs were completely disrupted. Consistent with this, MARTX toxin-pendent rapid release of cytosolic lactate dehydrogenase was significantly delayed in the plpA deletion background. Mutations in other exotoxins such as elastase, cytolysin/hemolysin, and/or extracellular metalloprotease did not affect the bleb formation or disruption. Together, these findings indicate that the pore forming MARTX toxin and the phospholipase A2, PlpA, cooperate sequentially to achieve rapid necrotic cell death by inducing cell blebbing and disrupting the blebs, respectively.

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Genome-wide phenotypic profiling of transcription factors and identification of novel targets to control the virulence of Vibrio vulnificus
Dayoung Sung, Garam Choi, Minji Ahn, Hokyung Byun, Tae Young Kim, Hojun Lee, Zee-Won Lee, Ji Yong Park, Young Hyun Jung, Ho Jae Han, Sang Ho Choi
Nucleic Acids Research.2024;[Epub] CrossRef
Vibrio-infecting bacteriophages and their potential to control biofilm
Ana Cevallos-Urena, Jeong Yeon Kim, Byoung Sik Kim
Food Science and Biotechnology.2023; 32(12): 1719. CrossRef
Pathogenic Mechanism of Vibrio Vulnificus Infection
Kun Lu, Yang Li, Rui Chen, Hua Yang, Yong Wang, Wei Xiong, Fang Xu, Qijun Yuan, Haihui Liang, Xian Xiao, Renqiang Huang, Zhipeng Chen, Chunou Tian, Songqing Wang
Future Microbiology.2023; 18(6): 373. CrossRef
Functional conservation of specialized ribosomes bearing genome-encoded variant rRNAs in Vibrio species
Younkyung Choi, Eunkyoung Shin, Minho Lee, Ji-Hyun Yeom, Kangseok Lee, Bashir Sajo Mienda
PLOS ONE.2023; 18(12): e0289072. CrossRef
Complex regulatory networks of virulence factors in Vibrio vulnificus
Garam Choi, Sang Ho Choi
Trends in Microbiology.2022; 30(12): 1205. CrossRef
MARTX toxin of Vibrio vulnificus induces RBC phosphatidylserine exposure that can contribute to thrombosis
Han Young Chung, Yiying Bian, Kyung-Min Lim, Byoung Sik Kim, Sang Ho Choi
Nature Communications.2022;[Epub] 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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Abstract

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

Vagococcus zengguangii sp. nov., isolated from yak faeces: Yajun Ge , Dong Jin , Xin-He Lai , Jing Yang , Shan Lu , Ying Huang , Han Zheng , Xiaoyan Zhang , Jianguo Xu; J. Microbiol. 2021;59(1):1-9. Published online December 23, 2020; DOI: https://doi.org/10.1007/s12275-021-0406-3

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Abstract

Two unknown Gram-stain-positive, catalase- and oxidasenegative, non-motile, and coccus-shaped bacteria, designated MN-17T and MN-09, were isolated from yaks faeces (Bos grunniens) in the Qinghai-Tibet Plateau of China. 16S rRNA gene sequence-based comparative analyses revealed that the two strains were grouped within the genus Vagococcus, displaying the highest similarity with Vagococcus xieshaowenii CGMCC 1.16436T (98.6%) and Vagococcus elongatus CCUG 51432T (96.4%). Both strains grew optimally at 37°C and pH 7.0 in the presence of 0.5% (w/v) NaCl. The complete genome of MN-17T comprises 2,085 putative genes with a total of 2,190,262 bp and an average G + C content of 36.7 mol%. The major fatty acids were C16:0 (31.2%), C14:0 (28.5%), and C18:1ω9c (13.0%); the predominant respiratory quinone was MK-7 (68.8%); the peptidoglycan type was A4α(L-Lys-DAsp); and the major polar lipid was diphosphatidylglycerol. Together, these supported the affiliation of strain MN-17T to the genus Vagococcus. In silico DNA-DNA hybridization and the average nucleotide identity values between MN-17T and all recognized species in the genus were 21.6–26.1% and 70.7–83.0%, respectively. MN-17T produced acid from D-cellobiose, D-fructose, glycerol, D-glucose, N-acetyl-glucosamine, gentiobiose, D-mannose, D-maltose, D-ribose, Dsaccharose, salicin, D-trehalose, and D-xylose. These results distinguished MN-17T and MN-09 from closely related species in Vagococcus. Thus, we propose that strains MN-17T and MN-09 represent a novel species in the genus Vagococcus, with the name Vagococcus zengguangii sp. The type strain is MN-17T (= CGMCC 1.16726T = GDMCC 1.1589T = JCM 33478T).

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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
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

Review

Regulation of the AcrAB efflux system by the quorum-sensing regulator AnoR in Acinetobacter nosocomialis: Bindu Subhadra , Surya Surendran , Bo Ra Lim , Jong Sung Yim , Dong Ho Kim , Kyungho Woo , Hwa-Jung Kim , Man Hwan Oh , Chul Hee Choi; J. Microbiol. 2020;58(6):507-518. Published online May 27, 2020; DOI: https://doi.org/10.1007/s12275-020-0185-2

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Abstract

Multidrug efflux pumps play an important role in antimicrobial resistance and pathogenicity in bacteria. Here, we report the functional characterization of the RND (resistance-nodulation- division) efflux pump, AcrAB, in Acinetobacter nosocomialis. An in silico analysis revealed that homologues of the AcrAB efflux pump, comprising AcrA and AcrB, are widely distributed among different bacterial species. Deletion of acrA and/or acrB genes led to decreased biofilm/pellicle formation and reduced antimicrobial resistance in A. nosocomialis. RNA sequencing and mRNA expression analyses showed that expression of acrA/B was downregulated in a quorum sensing (QS) regulator (anoR)-deletion mutant, indicating transcriptional activation of the acrAB operon by AnoR in A. nosocomialis. Bioassays showed that secretion of N-acyl homoserine lactones (AHLs) was unaffected in acrA and acrB deletion mutants; however, AHL secretion was limited in a deletion mutant of acrR, encoding the acrAB regulator, AcrR. An in silico analysis indicated the presence of AcrR-binding motifs in promoter regions of anoI (encoding AHL synthase) and anoR. Specific binding of AcrR was confirmed by electrophoretic mobility shift assays, which revealed that AcrR binds to positions -214 and -217 bp upstream of the translational start sites of anoI and anoR, respectively, demonstrating transcriptional regulation of these QS genes by AcrR. The current study further addresses the possibility that AcrAB is controlled by the osmotic stress regulator, OmpR, in A. nosocomialis. Our data demonstrate that the AcrAB efflux pump plays a crucial role in biofilm/pellicle formation and antimicrobial resistance in A. nosocomialis, and is under the transcriptional control of a number of regulators. In addition, the study emphasizes the interrelationship of QS and AcrAB efflux systems in A. nosocomialis.

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Types and Mechanisms of Efflux Pump Systems and the Potential of Efflux Pump Inhibitors in the Restoration of Antimicrobial Susceptibility, with a Special Reference to Acinetobacter baumannii
Kira M. Zack, Trent Sorenson, Suresh G. Joshi
Pathogens.2024; 13(3): 197. CrossRef
Lysine Trimethylation in Planktonic and Pellicle Modes of Growth in Acinetobacter baumannii
Nicolas Nalpas, Takfarinas Kentache, Emmanuelle Dé, Julie Hardouin
Journal of Proteome Research.2023; 22(7): 2339. CrossRef
The Mechanism of Tigecycline Resistance in Acinetobacter baumannii Revealed by Proteomic and Genomic Analysis
Cunwei Liu, Lei Wang, Ping Wang, Di Xiao, Qinghua Zou
International Journal of Molecular Sciences.2023; 24(10): 8652. CrossRef
Antimicrobial photodynamic therapy against oral biofilm: influencing factors, mechanisms, and combined actions with other strategies
Yijun Li, Guanwen Sun, Jingchan Xie, Suli Xiao, Chen Lin
Frontiers in Microbiology.2023;[Epub] CrossRef
The multifaceted genusAcinetobacter: from infection to bioremediation
Ujwal Dahal, Karan Paul, Shelly Gupta
Journal of Applied Microbiology.2023;[Epub] CrossRef
Efflux pumps and microbial biofilm formation
Mahdyeh Neghabi Hajiagha, Hossein Samadi Kafil
Infection, Genetics and Evolution.2023; 112: 105459. CrossRef
Targeting the Holy Triangle of Quorum Sensing, Biofilm Formation, and Antibiotic Resistance in Pathogenic Bacteria
Ronit Vogt Sionov, Doron Steinberg
Microorganisms.2022; 10(6): 1239. CrossRef
Evidence for Complex Interplay between Quorum Sensing and Antibiotic Resistance in Pseudomonas aeruginosa
Rakesh Sikdar, Mikael H. Elias, Giordano Rampioni
Microbiology Spectrum.2022;[Epub] CrossRef
Update on Multidrug Resistance Efflux Pumps in Acinetobacter spp.
Vanessa Kornelsen, Ayush Kumar
Antimicrobial Agents and Chemotherapy.2021;[Epub] CrossRef
Orthopedic Implant-Related Biofilm Pathophysiology: A Review of the Literature
Meletis Rozis, Dimitrios S Evangelopoulos, Spyros G Pneumaticos
Cureus.2021;[Epub] CrossRef
The impact of cell structure, metabolism and group behavior for the survival of bacteria under stress conditions
Xinyi Zhang, Zhendong Li, Shengmei Pang, Boyu Jiang, Yang Yang, Qiangde Duan, Guoqiang Zhu
Archives of Microbiology.2021; 203(2): 431. CrossRef

Journal Articles

Development of a real-time loop-mediated isothermal amplification method for the detection of severe fever with thrombocytopenia syndrome virus: Jae Woong Lee , Yu-Jung Won , Lae Hyung Kang , Sung-Geun Lee , Seung-Won Park , Soon-Young Paik; J. Microbiol. 2020;58(8):711-715. Published online May 18, 2020; DOI: https://doi.org/10.1007/s12275-020-0109-1

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Abstract

Severe fever with thrombocytopenia syndrome (SFTS) is being reported annually in South Korea since its first detection there in 2010. The causal agent is a negative-strand RNA virus 80–100 nm in diameter. It causes fever, thrombocytopenia, leukocytopenia, gastrointestinal symptoms, and neural symptoms. The mortality rate of SFTS was 32.6% among 172
case
s reported from 2012 to 2015 in South Korea. Thus, is necessary to develop an effective diagnostic method that selectively identifies the isolates circulating in South Korea. The real-time reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay is a simple, rapid, and sensitive approach for molecular diagnosis. Here, we designed novel primers for this assay and found that the technique had very high specificity, sensitivity, and efficiency. This real-time RTLAMP approach using the novel primers developed herein can be applied for early diagnosis of SFTSV strains in South Korea to reduce the mortality rate of SFTS.

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Long-Term Detection and Isolation of Severe Fever with Thrombocytopenia Syndrome (SFTS) Virus in Dog Urine
Yumiko Saga, Toshikazu Yoshida, Rieko Yoshida, Shunsuke Yazawa, Takahisa Shimada, Noriko Inasaki, Masae Itamochi, Emiko Yamazaki, Kazunori Oishi, Hideki Tani
Viruses.2023; 15(11): 2228. CrossRef
Advancements in the Worldwide Detection of Severe Fever with Thrombocytopenia Syndrome Virus Infection from 2009 to 2023
Lin Ai, Wei Wang, Zheng Teng
China CDC Weekly.2023; 5(31): 687. CrossRef
Molecular detection of “Candidatus Rickettsia tarasevichiae” by Loop-mediated Isothermal Amplification (LAMP) of the ompA gene
Jing Xue, Qing Ren, Rui Jian, Guang-Cheng Xie, Yongliang Chen, Jiangli Wang, Luanying Du, Wen-Ping Guo
Journal of Microbiological Methods.2022; 202: 106601. CrossRef
Dual-gene detection in a single-tube system based on CRISPR-Cas12a/Cas13a for severe fever thrombocytopenia syndrome virus
Yating Zhu, Chen Xing, Li Yang, Qian Li, Xiaofeng Wang, Jing Zhou, Cong Zhang, Cuiping Ren, Fahu Liu, Jun He, Bing Shen, Yinan Du, Yan Liu
Frontiers in Microbiology.2022;[Epub] CrossRef
CRISPR/Cas12a Technology Combined With RPA for Rapid and Portable SFTSV Detection
Mengqian Huang, Sihua Liu, Yanan Xu, Aqian Li, Wei Wu, Mifang Liang, Guoyu Niu, Zhiyun Wang, Tao Wang
Frontiers in Microbiology.2022;[Epub] CrossRef
Development of monoclonal antibody based IgG and IgM ELISA for diagnosis of severe fever with thrombocytopenia syndrome virus infection
Mei Zhang, Yanhua Du, Li Yang, Lin Zhan, Bin Yang, Xueyong Huang, Bianli Xu, Koichi Morita, Fuxun Yu
The Brazilian Journal of Infectious Diseases.2022; 26(4): 102386. CrossRef
Development of an RT-LAMP Assay for the Rapid Detection of SFTS Virus
Shiori Sano, Shuetsu Fukushi, Souichi Yamada, Shizuko Harada, Hitomi Kinoshita, Satoko Sugimoto, Tomoki Yoshikawa, Takeshi Kurosu, Yuki Takamatsu, Masayuki Shimojima, Shoichi Toda, Yuka Hamada, Naoki Fujisawa, Takayuki Sugimoto, Masayuki Saijo
Viruses.2021; 13(4): 693. CrossRef
A Real-Time Loop-Mediated Isothermal Amplification for Detection of the Wheat Dwarf Virus in Wheat and the Insect VectorPsammotettix alienus
Xingan Hao, Licheng Wang, Xudong Zhang, Qinrong Zhong, Jamal-U-Ddin Hajano, Liangsheng Xu, Yunfeng Wu
Plant Disease.2021; 105(12): 4113. CrossRef
Baseline mapping of severe fever with thrombocytopenia syndrome virology, epidemiology and vaccine research and development
Nathen E. Bopp, Jaclyn A. Kaiser, Ashley E. Strother, Alan D. T. Barrett, David W. C. Beasley, Virginia Benassi, Gregg N. Milligan, Marie-Pierre Preziosi, Lisa M. Reece
npj Vaccines.2020;[Epub] CrossRef

Streptococcus pneumoniae aminopeptidase N contributes to bacterial virulence and elicits a strong innate immune response through MAPK and PI3K/AKT signaling: Ling Wang , Xuemei Zhang , Guangying Wu , Yuhong Qi , Jinghui Zhang , Jing Yang , Hong Wang , Wenchun Xu; J. Microbiol. 2020;58(4):330-339. Published online February 27, 2020; DOI: https://doi.org/10.1007/s12275-020-9538-0

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Abstract

Streptococcus pneumoniae is a Gram-positive pathogen with high morbidity and mortality globally but some of its pathogenesis remains unknown. Previous research has provided evidence that aminopeptidase N (PepN) is most likely a virulence factor of S. pneumoniae. However, its role in S. pneumoniae virulence and its interaction with the host remains to be confirmed. We generated a pepN gene deficient mutant strain and found that its virulence for mice was significantly attenuated as were in vitro adhesion and invasion of host cells. The PepN protein could induce a strong innate immune response in vivo and in vitro and induced secretion of IL-6 and TNF-α by primary peritoneal macrophages via the rapid phosphorylation of MAPK and PI3K/AKT signaling pathways and this was confirmed using specific pathway inhibitors. In conclusion, PepN is a novel virulence factor that is essential for the virulence of S. pneumoniae and induces host innate immunity via MAPK and PI3K/AKT signaling.

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The discovery of potent immunostimulatory CpG-ODNs widely distributed in bacterial genomes: Juan Liu , Yan Wei , Yongling Lu , Yangyuling Li , Qian Chen , Yan Li; J. Microbiol. 2020;58(2):153-162. Published online December 23, 2019; DOI: https://doi.org/10.1007/s12275-020-9289-y

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Abstract

Oligodeoxynucleotides containing unmethylated CpG dinucleotides (CpG-ODN) can be specifically recognized by Toll-like receptor 9 (TLR9), provoking innate immune responses. Designed according to this structural feature, many synthetic phosphorothioate CpG-ODNs successfully activate macrophages. However, it is difficult to find potent stimulatory CpG-DNA fragments in microbial genomes. Therefore, whether microbial CpG-DNA substantially contributes to infectious and immune diseases remains controversial. In this study, high-throughput scanning was carried out for thousands of bacterial genomes with bioinformatics tools to comprehensively evaluate the distribution of CpG-DNA fragments. A random sampling test was then performed to verify their immunostimulatory properties by experiments in vitro and in vivo. Natural TLR9-dependent and potent stimulatory CpG-DNA fragments were found in microbial genomes. Interestingly, highly conserved stimulatory CpG-DNA fragments were found in 16S and 23S rDNA sequences with multiple copies, while others were species-specific. Additionally, we found that the reported active motifs were mostly nonstimulatory in natural CpG fragments. This evidence indicates that the previous structural descriptions of functional CpG-ODNs are incomplete. Our study has assessed the distribution of microbial CpG-DNA fragments, and identified natural stimulatory CpG-DNA fragments. These findings provide a deeper understanding of CpG-ODN structures and new evidence for microbial DNA inflammatory function and pathogenicity.

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[MINIREVIEW] Interdependence between iron acquisition and biofilm formation in Pseudomonas aeruginosa: Donghoon Kang , Natalia V. Kirienko; J. Microbiol. 2018;56(7):449-457. Published online June 14, 2018; DOI: https://doi.org/10.1007/s12275-018-8114-3

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Abstract

Bacterial biofilms remain a persistent threat to human healthcare due to their role in the development of antimicrobial resistance. To combat multi-drug resistant pathogens, it is crucial to enhance our understanding of not only the regulation of biofilm formation, but also its contribution to bacterial virulence. Iron acquisition lies at the crux of these two subjects. In this review, we discuss the role of iron acquisition in biofilm formation and how hosts impede this mechanism to defend against pathogens. We also discuss recent findings that suggest that biofilm formation can also have the reciprocal effect, influencing siderophore production and iron sequestration.

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REVIEW] Type 3 regulatory T cells at the interface of symbiosis: Joo-Hong Park , Gérard Eberl; J. Microbiol. 2018;56(3):163-171. Published online February 28, 2018; DOI: https://doi.org/10.1007/s12275-018-7565-x

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Abstract

The mammalian gastrointestinal tract accommodates trillions of bacteria, many of which provide beneficial effects to the host, including protection from pathogenic microorganisms and essential metabolites. However, the intestinal immune system needs to adapt to the constantly fluctuating microbial environment at mucosal surfaces in order to maintain homeostasis. In particular, the gut microbiota induces the differentiation of effector Th17 cells and regulatory T cells (Tregs) that express RORγt, the master regulator of antimicrobial type 3 immunity. RORγt+ Tregs constitute a major population of colonic Tregs that is distinct from thymusderived Tregs and require bacterial antigens for differentiation. The balance between Th17 cells and RORγt+ Tregs, that is, the tone of the local type 3 immune response, is regulated by the vitamin A metabolite retinoic acid produced by the host. Furthermore, Th17 cells and RORγt+ Tregs regulate intestinal type 2 immune responses, explaining how bacteria block allergic reactions. Here, we review the cellular and molecular mechanisms involved in the differentiation, regulation and function of RORγt+ (type 3) Tregs, and discuss the multiple equilibria that exist between effector T cells and Tregs, as well as between different types of immune responses, which are necessary to maintain homeostasis and health.

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REVIEW] Innate host defenses against Cryptococcus neoformans: Camaron Hole , Floyd L. Wormley Jr.; J. Microbiol. 2016;54(3):202-211. Published online February 27, 2016; DOI: https://doi.org/10.1007/s12275-016-5625-7

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Abstract

Cryptococcus neoformans, the predominant etiological agent of cryptococcosis, can cause life-threatening infections of the central nervous system in immunocompromised and immunocompetent individuals. Cryptococcal meningoencephalitis is the most common disseminated fungal infection in AIDS patients, and remains the third most common invasive fungal infection among organ transplant recipients. The administration of highly active antiretroviral therapy (HAART) has
result
ed in a decrease in the number of cases of AIDS-related cryptococcosis in developed countries, but in developing countries where HAART is not readily available, Cryptococcus is still a major concern. Therefore, there is an urgent need for the development of novel therapies and/or vaccines to combat cryptococcosis. Understanding the protective immune responses against Cryptococcus is critical for development of vaccines and immunotherapies to combat cryptococcosis. Consequently, this review focuses on our current knowledge of protective immune responses to C. neoformans, with an emphasis on innate immune responses.

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Research Support, Non-U.S. Gov't

Therapeutic potential of an AcHERV-HPV L1 DNA vaccine: Hee-Jung Lee , Jong Kwang Yoon , Yoonki Heo , Hansam Cho , Yeondong Cho , Yongdae Gwon , Kang Chang Kim , Jiwon Choi , Jae Sung Lee , Yu-Kyoung Oh , Young Bong Kim; J. Microbiol. 2015;53(6):415-420. Published online May 30, 2015; DOI: https://doi.org/10.1007/s12275-015-5150-0

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Abstract

Cervical cancer is strongly associated with chronic human papillomavirus infections, among which HPV16 is the most common. Two commercial HPV vaccines, Gardasil and Cervarix are effective for preventing HPV infection, but cannot be used to treat existing HPV infections. Previously, we developed a human endogenous retrovirus (HERV)-enveloped recombinant baculovirus capable of delivering the L1 genes of HPV types 16, 18, and 58 (AcHERV-HP16/18/58L1, AcHERV-HPV). Intramuscular administration of AcHERVHPV vaccines induced a strong cellular immune response as well as a humoral immune response. In this study, to examine the therapeutic effect of AcHERV-HPV in a mouse model, we established an HPV16 L1 expressing tumor cell line. Compared to Cervarix, immunization with AcHERVHPV greatly enhanced HPV16 L1-specific cytotoxic T lymphocytes (CTL) in C57BL/6 mice. Although vaccination could not remove preexisting tumors, strong CTL activity retarded the growth of inoculated tumor cells. These results indicate that AcHERV-HPV could serve as a potential therapeutic DNA vaccine against concurrent infection with HPV 16, 18, and 58.

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