Host Defense Peptide Expression in Human Cervical Cells and Regulation by 1,25-Dihydroxyvitamin D3 in the Presence of Cytokines and Bacterial Endotoxin.
Abstract
Host defense peptides (HDPs) in the pregnant female reproductive tract provide protection against infection. The relationship between HDPs and infection/inflammation is poorly understood. Therefore, we investigated the regulation of HDPs by 1α, 25-dihydroxyvitamin D3 (1,25-(OH)2) in the presence/absence of infectious/inflammatory agents. Endocervical epithelial cells (END1/E6E7, n = 6) were exposed to 1,25-(OH)2, calcipotriol, interleukin 1β (IL-1β), granulate-macrophage colony-stimulating factor (GM-GSF), and lipopolysaccharide (LPS). Elafin, human beta defensin (hBD2), cathelicidin, secretory leucocyte protease inhibitor, interleukin 8, 1,25-(OH)2 receptor, and toll-like receptor 4 (TLR4) expression was determined using quantitative polymerase chain reaction and/or enzyme-linked immunosorbent assay. Host defense peptide gene and protein expression was assessed in cervicovaginal cells/fluid, respectively, from first trimester pregnant women (n = 8-12). Interleukin 1β induced elafin and hBD2. The 1,25-(OH)2 induced cathelicidin expression in the presence of IL-1β and LPS. The 1,25-(OH)2 also attenuated IL-1β-induced IL-8 expression and LPS enhancement of TLR4. Host defense peptides and TLR4 profiles in cervicovaginal cells and ...Continue Reading
References
Induction of human β-defensins and psoriasin in vulvovaginal human papillomavirus-associated lesions
Citations
Cervicovaginal microbiota and metabolome predict preterm birth risk in an ethnically diverse cohort.
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