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CerviCo-Vaginal Dysbiosis as Risk Factor for Sexually Transmitted Diseases: Insights from Molecular Researches

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Microbiology".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 4522

Special Issue Editor

Department of Public Health and Infectious Diseases, “Sapienza” University, 00185 Rome, Italy
Interests: identification of host defence factors towards C. trachomatis genital infection; study of C. trachomatis role in the pathogenesis of male infertility; study of chlamydia-host cell interaction; identification of new anti-chlamydial drugs; study of the etiopathogenic role Chlamydia pneumoniae in the chronic inflammatory diseases
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Special Issue Information

Dear Colleagues,

The genital microenvironment is an ecological niche characterized by a dynamic balance between numerous aerobic and anaerobic microorganisms that constitute the resident microbiota, widely considered as an important defense factor in the female genital tract against invading pathogens. In healthy women, the genital microbiota is typically dominated by several Lactobacillus species, conferring protection against infections through several mechanisms, such as competitive exclusion and the production of hydrogen peroxide and bacteriocins. By contrast, the depletion of lactobacilli and the overgrowth of a wide array of strict and facultative anaerobes—including Gardnerella vaginalis, Atopobium vaginae and Prevotella spp.—leads to a condition called dysbiosis that has been associated with an increased risk of sexually transmitted infections, such as Chlamydia trachomatis, Neisseria gonorrhoeae, HPV, HIV, etc.

This Special Issue aims to gather the most recent evidence on either genital dysbiosis as a risk factor for sexually transmitted infections or the protective activity of a lactobacillus-dominated microbiota. Studies on microbe-associated molecular patterns will also be considered. Overall, this will provide a more comprehensive picture of the multifaceted role of the cervico-vaginal microenvironment regarding infectious agents.

You may choose our Joint Special Issue in Reproductive Medicine.

Prof. Rosa Sessa
Guest Editor

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Keywords

  • Sexually transmitted diseases
  • Cervico-vaginal microbiota
  • Dysbiosis
  • Microbe-associated molecular patterns
  • Next-generation sequencing
  • Metabolomic
  • Proteomic.

Published Papers (1 paper)

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Research

15 pages, 6733 KiB  
Article
Vaginal Lactobacilli and Vaginal Dysbiosis-Associated Bacteria Differently Affect Cervical Epithelial and Immune Homeostasis and Anti-Viral Defenses
by Sabrina Nicolò, Michele Tanturli, Giorgio Mattiuz, Alberto Antonelli, Ilaria Baccani, Chiara Bonaiuto, Simone Baldi, Giulia Nannini, Marta Menicatti, Gianluca Bartolucci, Gian Maria Rossolini, Amedeo Amedei and Maria Gabriella Torcia
Int. J. Mol. Sci. 2021, 22(12), 6487; https://0-doi-org.brum.beds.ac.uk/10.3390/ijms22126487 - 17 Jun 2021
Cited by 22 | Viewed by 3986
Abstract
Persistent infection with High Risk-Human Papilloma Viruses (HR-HPVs) is a primary cause of cervical cancer worldwide. Vaginal-dysbiosis-associated bacteria were correlated with the persistence of HR-HPVs infection and with increased cancer risk. We obtained strains of the most represented bacterial species in vaginal microbiota [...] Read more.
Persistent infection with High Risk-Human Papilloma Viruses (HR-HPVs) is a primary cause of cervical cancer worldwide. Vaginal-dysbiosis-associated bacteria were correlated with the persistence of HR-HPVs infection and with increased cancer risk. We obtained strains of the most represented bacterial species in vaginal microbiota and evaluated their effects on the survival of cervical epithelial cells and immune homeostasis. The contribution of each species to supporting the antiviral response was also studied. Epithelial cell viability was affected by culture supernatants of most vaginal-dysbiosis bacteria, whereas Lactobacillus gasseri or Lactobacillus jensenii resulted in the best stimulus to induce interferon-γ (IFN-γ) production by human mononuclear cells from peripheral blood (PBMCs). Although vaginal-dysbiosis-associated bacteria induced the IFN-γ production, they were also optimal stimuli to interleukin-17 (IL-17) production. A positive correlation between IL-17 and IFN-γ secretion was observed in cultures of PBMCs with all vaginal-dysbiosis-associated bacteria suggesting that the adaptive immune response induced by these strains is not dominated by TH1 differentiation with reduced availability of IFN-γ, cytokine most effective in supporting virus clearance. Based on these results, we suggest that a vaginal microbiota dominated by lactobacilli, especially by L. gasseri or L. jensenii, may be able to assist immune cells with clearing HPV infection, bypasses the viral escape and restores immune homeostasis. Full article
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