Journal of Microbiology

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Vaginal Microbiome Dysbiosis is Associated with the Different Cervical Disease Status: Yingying Ma , Yanpeng Li , Yanmei Liu , Le Cao , Xiao Han , Shujun Gao , Chiyu Zhang; J. Microbiol. 2023;61(4):423-432. Published online April 3, 2023; DOI: https://doi.org/10.1007/s12275-023-00039-3

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Vaginal microbiome composition was demonstrated to be associated with cervical disease. The colonization characteristics of vaginal microbes and their association with the different cervical disease status, especially cervical cancer (CC), are rarely investigated. In this cross-sectional study, we characterized the vaginal microbiome of women with different status of cervical diseases, including 22 NV + (normal tissue with HPV infection), low-grade squamous intraepithelial lesion (LSIL, n = 45), high-grade squamous intraepithelial lesion (HSIL, n = 36) and CC (n = 27) using bacterial 16S DNA sequencing. Thirty HPV-negative women with normal tissue were used as the control group. We found that higher diversity of microbiome with gradual depletion of Lactobacillus, especially L. crispatus, was associated with the severity of cervical disease. High-risk HPV16 infection was associated with higher microbiome diversity and depletion of Lactobacillus in high-grade cervical diseases (i.e. HSIL and CC). The CC group was characterized by higher levels of Fannyhessea vaginae, Prevotella, Bacteroides, Finegoldia, Vibrio, Veillonella, Peptostreptococcus, and Dialister. Co-occurrence network analyses showed that negative correlations were exclusively observed between Lactobacillus and other bacteria, and almost all non-Lactobacillus bacteria were positively correlated with each other. In particular, the most diverse and complex co-occurrence network of vaginal bacteria, as well as a complete loss of L. crispatus, was observed in women with CC. Logistic regression model identified HPV16 and Lactobacillus as significant risk and protective factors for CC, respectively. These results suggest that specific Lactobacillus species (e.g. L. crispatus and L. iners) can be used as important markers to target prevention measures prioritizing HPV16-infected women and other hrHPV-infected women for test, vaccination and treat initiatives.

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Vaginal Microbiome and Pregnancy Complications: A Review
Angeliki Gerede, Konstantinos Nikolettos, Eleftherios Vavoulidis, Chrysoula Margioula-Siarkou, Stamatios Petousis, Maria Giourga, Panagiotis Fotinopoulos, Maria Salagianni, Sofoklis Stavros, Konstantinos Dinas, Nikolaos Nikolettos, Ekaterini Domali
Journal of Clinical Medicine.2024; 13(13): 3875. CrossRef
Advancements in the Vaginal Microenvironment and Regression of High-Risk Human Papillomavirus
Na He, Cunjian Yi, Qingsong Zeng, Wumei Jing, Wenrong He
Indian Journal of Microbiology.2024;[Epub] CrossRef
Research Progress on Related Factors of Cervical High-Grade Squamous Intraepithelial Lesions
红颖王
Advances in Clinical Medicine.2023; 13(12): 20536. CrossRef
Role of the vaginal microbiome in miscarriage: exploring the relationship
Marwa Saadaoui, Parul Singh, Osman Ortashi, Souhaila Al Khodor
Frontiers in Cellular and Infection Microbiology.2023;[Epub] CrossRef

Gamma-glutamyltransferase of Helicobacter pylori alters the proliferation, migration, and pluripotency of mesenchymal stem cells by affecting metabolism and methylation status: Zeyu Wang , Weijun Wang , Huiying Shi , Lingjun Meng , Xin Jiang , Suya Pang , Mengke Fan , Rong Lin; J. Microbiol. 2022;60(6):627-639. Published online April 18, 2022; DOI: https://doi.org/10.1007/s12275-022-1575-4

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Abstract

Virulence factor gamma-glutamyltransferase (GGT) of H. pylori consumes glutamine (Gln) in the stomach to decrease the tricarboxylic acid metabolite alpha-ketoglutarate (α-kg) and alter the downstream regulation of α-kg as well as cellular biological characteristics. Our previous research indicated that under H. pylori infection, mesenchymal stem cells (MSCs) migrated to the stomach and participated in gastric cancer (GC) development either by differentiating into epithelial cells or promoting angiogenesis. However, how MSCs themselves participate in H. pylori-indicated GC remains unclear. Therefore, a GGT knockout H. pylori strain (Hp- KS-1) was constructed, and downstream histone H3K9 and H3K27 methylation and the PI3K/AKT signaling pathway of α-kg were detected using Western blotting. The biological characteristics of MSCs were also examined. An additive α-kg supplement was also added to H. pylori-treated MSCs to investigate alterations in these aspects. Compared to the control and Hp-KS-1 groups, H. pylori-treated MSCs reduced Gln and α-kg, increased H3K9me3 and H3K27me3, activated the PI3K-AKT signaling pathway, and promoted the proliferation, migration, self-renewal, and pluripotency of MSCs. The addition of α-kg rescued the H. pylori-induced alterations. Injection of MSCs to nude mice resulted in the largest tumors in the H. pylori group and significantly reduced tumor sizes in the Hp-KS-1 and α-kg groups. In summary, GGT of H. pylori affected MSCs by interfering with the metabolite α-kg to increase trimethylation of histone H3K9 and H3K27, activating the PI3K/AKT signaling pathway, and promoting proliferation, migration, self-renewal, and pluripotency in tumorigenesis, elucidating the mechanisms of MSCs in GC development.

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Gamma-glutamyl transferase secreted by Helicobacter pylori promotes the development of gastric cancer by affecting the energy metabolism and histone methylation status of gastric epithelial cells
Xin Jiang, Weijun Wang, Zeyu Wang, Zhe Wang, Huiying Shi, Lingjun Meng, Suya Pang, Mengke Fan, Rong Lin
Cell Communication and Signaling.2024;[Epub] CrossRef
Design of a Helicobacter pylori multi-epitope vaccine based on immunoinformatics
Man Cui, Xiaohui Ji, Fengtao Guan, Guimin Su, Lin Du
Frontiers in Immunology.2024;[Epub] CrossRef
Gastric cancer and mesenchymal stem cell-derived exosomes: from pro-tumorigenic effects to anti-cancer vehicles
Maryam Dolatshahi, Ahmad Reza Bahrami, Qaiser Iftikhar Sheikh, Mohsen Ghanbari, Maryam M. Matin
Archives of Pharmacal Research.2024; 47(1): 1. CrossRef
Mesenchymal Stem Cell-Derived Exosomes Modulate Angiogenesis in Gastric Cancer
Fawzy Akad, Veronica Mocanu, Sorin Nicolae Peiu, Viorel Scripcariu, Bogdan Filip, Daniel Timofte, Florin Zugun-Eloae, Magdalena Cuciureanu, Monica Hancianu, Teodor Oboroceanu, Laura Condur, Radu Florin Popa
Biomedicines.2023; 11(4): 1031. CrossRef
Helicobacter pylori and Its Role in Gastric Cancer
Victor E. Reyes
Microorganisms.2023; 11(5): 1312. 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

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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.

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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

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