1. Differential expression of lactic acid isomers, extracellular matrix metalloproteinase inducer, and matrix metalloproteinase-8 in vaginal fluid from women with vaginal disorders.
- Author
-
Beghini, J, Linhares, IM, Giraldo, PC, Ledger, WJ, and Witkin, SS
- Subjects
BACTERIAL vaginitis ,BODY fluids ,VULVOVAGINAL candidiasis ,ENZYME-linked immunosorbent assay ,EPITHELIAL cells ,LACTIC acid ,PROTEOLYTIC enzymes ,VAGINA ,CROSS-sectional method - Abstract
Objective: Do metabolites in vaginal samples vary between women with different vaginal disorders.Design: Cross-sectional study.Setting: Campinas, Brazil.Sample: Seventy-seven women (39.9%) with no vaginal disorder, 52 women (26.9%) with vulvovaginal candidiasis (VVC), 43 women (22.3%) with bacterial vaginosis (BV), and 21 women (10.9%) with cytolytic vaginosis (CTV).Method: Concentrations of D- and L-lactic acid, extracellular matrix metalloproteinase inducer (EMMPRIN), and matrix metalloproteinase-8 (MMP-8), and the influence of Candida albicans on EMMPRIN production by cultured vaginal epithelial cells, were determined by enzyme-linked immunosorbent assay (ELISA). Associations were determined by the Mann-Whitney U-test and by Spearman's rank correlation test.Main Outcome Measures: Metabolite levels and their correlation with diagnoses.Results: Vaginal concentrations of D- and L-lactic acid were reduced from control levels in BV (P < 0.0001); L-lactic acid levels were elevated in CTV (P = 0.0116). EMMPRIN and MMP-8 concentrations were elevated in VVC (P < 0.0001). EMMPRIN and L-lactic acid concentrations (P ≤ 0.008), but not EMMPRIN and D-lactic acid, were correlated in all groups. EMMPRIN also increased in proportion with the ratio of L- to D-lactic acid in controls and in women with BV (P ≤ 0.009). Concentrations of EMMPRIN and MMP-8 were correlated in controls and women with VVC (P ≤ 0.0002). Candida albicans induced EMMPRIN release from vaginal epithelial cells.Conclusions: Vaginal secretions from women with BV are deficient in D- and L-lactic acid, women with VVC have elevated EMMPRIN and MMP-8 levels, and women with CTV have elevated L-lactic acid levels. These deviations may contribute to the clinical signs, symptoms, and sequelae that are characteristic of these disorders. [ABSTRACT FROM AUTHOR]- Published
- 2015
- Full Text
- View/download PDF