1. The two-way interaction between the molecules that cause vaginal malodour and lactobacilli
- Author
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Polycronis Paul Akouris, Scarlett Puebla-Barragan, Jeremy P. Burton, Mark W. Sumarah, Britney Lamb, Charlotte van der Veer, Remco Kort, Gregor Reid, Charles Carr, Kait F. Al, Molecular Cell Physiology, and AIMMS
- Subjects
QH301-705.5 ,Biogenic amines ,education ,Article ,Catalysis ,Microbiology ,law.invention ,Inorganic Chemistry ,chemistry.chemical_compound ,Probiotic ,law ,medicine ,Humans ,Biology (General) ,Physical and Theoretical Chemistry ,QD1-999 ,Molecular Biology ,Spectroscopy ,Cadaverine ,vaginal malodour ,dysbiosis ,probiotics ,lactobacilli ,vaginal microbiota ,biogenic amines ,biology ,Lactobacillus crispatus ,Probiotics ,Organic Chemistry ,Vaginosis, Bacterial ,General Medicine ,Tyramine ,biology.organism_classification ,medicine.disease ,Computer Science Applications ,Chemistry ,Lactobacillus ,Vaginal malodour ,chemistry ,Lactobacilli ,Vagina ,Putrescine ,Dysbiosis ,Female ,Vaginal microbiota ,Bacterial vaginosis ,Bacteria - Abstract
Vaginal malodour is a sign of dysbiosis. The biogenic amines (BAs) cadaverine, putrescine and tyramine are known to be causative compounds. Recent reports suggest these compounds produced by pathogens might have a role beyond causing malodour; namely inhibiting the growth of lactobacilli bacteria that are crucial in the maintenance of vaginal homeostasis. The aim of this study was to identify whether certain lactobacilli strains could reduce BAs and to evaluate how Lactobacillus species were affected by these compounds. Using LC–MS and HPLC-UV, five Lactobacillus crispatus strains were identified as being capable of significantly reducing BAs from the media under in vitro conditions. Through 16S rRNA gene sequencing of vaginal swabs exposed to Bas, cadaverine was found to reduce the relative abundance of lactobacilli. When L. crispatus was exposed to media supplemented with BAs with an HCl adjusted lower pH, its growth was enhanced, demonstrating the relevance of the maintenance of an acidic vaginal environment. If strains are to be developed for probiotic application to alleviate bacterial vaginosis and other conditions affecting large numbers of women worldwide, their ability to adapt to Bas and regulate pH should be part of the experimentation.
- Published
- 2021