RRC ID 80296
Author Takano T, Kudo H, Eguchi S, Matsumoto A, Oka K, Yamasaki Y, Takahashi M, Koshikawa T, Takemura H, Yamagishi Y, Mikamo H, Kunishima H.
Title Inhibitory effects of vaginal Lactobacilli on Candida albicans growth, hyphal formation, biofilm development, and epithelial cell adhesion.
Journal Front Cell Infect Microbiol
Abstract INTRODUCTION:Antifungal agents are not always efficient in resolving vulvovaginal candidiasis (VVC), a common genital infection caused by the overgrowth of Candida spp., including Candida albicans, or in preventing recurrent infections. Although lactobacilli (which are dominant microorganisms constituting healthy human vaginal microbiota) are important barriers against VVC, the Lactobacillus metabolite concentration needed to suppress VVC is unknown.
METHODS:We quantitatively evaluated Lactobacillus metabolite concentrations to determine their effect on Candida spp., including 27 vaginal strains of Lactobacillus crispatus, L. jensenii, L. gasseri, Lacticaseibacillus rhamnosus, and Limosilactobacillus vaginalis, with inhibitory abilities against biofilms of C. albicans clinical isolates.
RESULTS:Lactobacillus culture supernatants suppressed viable fungi by approximately 24%-92% relative to preformed C. albicans biofilms; however, their suppression differed among strains and not species. A moderate negative correlation was found between Lactobacillus lactate production and biofilm formation, but no correlation was observed between hydrogen peroxide production and biofilm formation. Both lactate and hydrogen peroxide were required to suppress C. albicans planktonic cell growth. Lactobacillus strains that significantly inhibited biofilm formation in culture supernatant also inhibited C. albicans adhesion to epithelial cells in an actual live bacterial adhesion competition test.
DISCUSSION:Healthy human microflora and their metabolites may play important roles in the development of new antifungal agent against C. albicans-induced VVC.
Volume 13
Pages 1113401
Published 2023-1-1
DOI 10.3389/fcimb.2023.1113401
PMID 37201113
PMC PMC10188118
MeSH Antifungal Agents / pharmacology Biofilms Candida Candida albicans* Candidiasis, Vulvovaginal* Epithelial Cells Female Humans Hydrogen Peroxide / pharmacology Lactobacillus
General Microbes JCM 1185 JCM 1131
Human and Animal Cells HeLa(RCB0008)