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Updated: Jul 14, 2026
10:19
A Murine Model of Group B Streptococcus Vaginal Colonization
Published on: November 16, 2016
TLR2-mediated cell stimulation in bacterial vaginosis
Debra Mares1, Jose A Simoes, Richard M Novak
1Department of Immunology/Microbiology, Rush University Medical Center, Chicago, IL 60612, USA.
Journal of Reproductive Immunology
|May 29, 2007
Summary
Bacterial vaginosis (BV) involves genital tract fluids activating Toll-like receptor 2 (TLR2), potentially explaining BV
Area of Science:
- Immunology
- Microbiology
- Reproductive Health
Background:
- Bacterial vaginosis (BV) is linked to adverse pregnancy outcomes and increased HIV risk.
- The specific mechanisms underlying these BV-associated pathologies remain unclear.
Purpose of the Study:
- To investigate the role of Toll-like receptor (TLR) ligands in bacterial vaginosis.
- To identify the specific TLRs activated by factors in the female genital tract during BV.
Main Methods:
- Cervicovaginal lavage (CVL) fluids were collected from women with and without BV.
- CVL samples were used to stimulate human monocytic cells and 293 cells expressing specific TLRs.
- Cytokine secretion (IL-8, TNF-alpha), NF-kappaB activation, and HIV LTR activation were measured.
Main Results:
- BV CVLs induced higher levels of IL-8, TNF-alpha, NF-kappaB, and HIV LTR activation compared to controls.
- BV CVLs preferentially stimulated IL-8 secretion in cells expressing TLR2.
- BV CVLs did not activate TLR4/MD2-expressing cells, despite LPS responsiveness.
Conclusions:
- Soluble factors in BV cervicovaginal fluids activate immune cells through TLR2.
- TLR2 activation represents a potential pathway mediating the adverse effects associated with bacterial vaginosis.
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