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Multiomic analysis reveals that polyamines alter G. vaginalis-induced cervicovaginal epithelial cell dysfunction
Biorxiv : the Preprint Server for Biology
|December 3, 2025
Summary
Gardnerella vaginalis alters vaginal epithelial cells by increasing polyamine biosynthesis. These polyamines can mitigate inflammation and restore epithelial barrier function, suggesting a key role in reproductive health.
Area of Science:
- Microbiology
- Reproductive Biology
- Immunology
Background:
- An imbalance in the cervicovaginal microbiome, characterized by low Lactobacillus and high anaerobe levels, is linked to adverse reproductive outcomes.
- Gardnerella vaginalis, a prevalent anaerobe, disrupts epithelial cell function, leading to inflammation and barrier compromise, but the underlying mechanisms are unclear.
Purpose of the Study:
- To investigate the specific host-microbial mechanisms by which Gardnerella vaginalis induces cervicovaginal epithelial dysfunction.
- To explore the role of polyamines in mediating the interaction between G. vaginalis and epithelial cells.
Main Methods:
- Analysis of cervicovaginal epithelial cell metabolite profiles to identify microbe-specific changes.
- Transcriptomic profiling of epithelial cells pretreated with polyamines and exposed to G. vaginalis.
- Assessment of polyamine-mediated effects on inflammatory responses and epithelial barrier function.
Main Results:
- Gardnerella vaginalis significantly increases polyamine biosynthesis in epithelial cells, unlike Lactobacillus crispatus.
- Polyamines (putrescine, spermidine, spermine) alter G. vaginalis-induced transcriptomic profiles, affecting genes in bacterial defense, inflammation, and epigenetics.
- Polyamines mitigate G. vaginalis-induced inflammation by reducing cytokines, chemokines, and matrix metalloproteinases, thereby supporting epithelial defense.
Conclusions:
- Metabolite-microbe interactions, specifically polyamine modulation by G. vaginalis, are critical in maintaining cervicovaginal epithelial defense.
- Understanding these mechanisms offers potential therapeutic targets for managing conditions associated with an altered vaginal microbiome and adverse reproductive outcomes.
