Document Detail

Influence of Lactic Acid on Endogenous and Viral RNA-Induced Immune Mediator Production by Vaginal Epithelial Cells.
MedLine Citation:
PMID:  21934447     Owner:  NLM     Status:  In-Data-Review    
OBJECTIVE: : To evaluate the influence of lactic acid on immune mediator release from vaginal epithelial cells.
METHODS: : The human vaginal epithelial cell line, VK2/E6E7, was cultured in the presence or absence of physiological concentrations of lactic acid, and in the presence or absence of the viral Toll-like receptor 3 agonist, poly (inosinic acid:cytidylic acid). Supernatants were assayed by enzyme-linked immunosorbent assay (ELISA) for interleukin (IL)-1β, IL-6, IL-8, IL-23, transforming growth factor (TGF)-β and secretory leukocyte protease inhibitor.
RESULTS: : Vaginal epithelial cells spontaneously released IL-1β (25.9 pg/mL), IL-8 (1.0 ng/mL), TGF-β (175 pg/mL), and secretory leukocyte protease inhibitor (33.8 ng/mL). Only TGF-β production was marginally enhanced (49%) by addition of lactic acid alone. Poly (inosinic acid:cytidylic acid) by itself stimulated the release of IL-6 (305 pg/mL) and enhanced IL-8 production (2.8 ng/mL). The combination of poly (inosinic acid:cytidylic acid) and lactic acid markedly increased IL-8 production (5.0 ng/mL) and induced the release of IL-1β (96.2 pg/mL). The poly (inosinic acid:cytidylic acid)-mediated lactic acid effect on IL-1β and IL-8 release was abrogated when the lactic acid was neutralized or if acetic acid was substituted for lactic acid.
CONCLUSION: : Lactic acid enhances the release of selective mediators from vaginal epithelial cells and stimulates antiviral immune responses.
Hannah Mossop; Iara M Linhares; Ann Marie Bongiovanni; William J Ledger; Steven S Witkin
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Obstetrics and gynecology     Volume:  118     ISSN:  1873-233X     ISO Abbreviation:  Obstet Gynecol     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-09-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401101     Medline TA:  Obstet Gynecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  840-6     Citation Subset:  AIM; IM    
From the Division of Immunology and Infectious Diseases, Department of Obstetrics and Gynecology, Weill Medical College of Cornell University, New York, New York; and the Department of Gynecology and Obstetrics, University of Sao Paulo Medical School and Hospital das Clinicas, Sao Paulo, Brazil.
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