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- W2103911193 abstract "ABSTRACT We have previously demonstrated that rat uterine epithelial cells (UEC) produce CCL20/macrophage inflammatory protein 3 alpha (MIP3α) and tumor necrosis factor alpha (TNF-α) in response to live and heat-killed Escherichia coli and to the pathogen-associated molecular patterns (PAMP) lipopolysaccharide (LPS) and Pam 3 Cys. To determine whether estradiol (E 2 ) modulates PAMP-induced CCL20/MIP3α and TNF-α secretion, primary cultures of rat UEC were incubated with E 2 for 24 h and then treated with LPS or Pam 3 Cys or not treated for an additional 12 h. E 2 inhibited the constitutive secretion of TNF-α and CCL20/MIP3α into culture media. Interestingly, E 2 pretreatment enhanced CCL20/MIP3α secretion due to LPS and Pam 3 Cys administration. In contrast, and at the same time, E 2 lowered the TNF-α response to both PAMP. To determine whether estrogen receptors (ER) mediated the effects of E 2 , epithelial cells were incubated with E 2 and/or ICI 182,780, a known ER antagonist. ICI 182,780 had no effect on E 2 inhibition of constitutive TNF-α and CCL20/MIP3α secretion. In contrast, ICI 182,780 reversed the stimulatory effect of E 2 on LPS- and/or Pam 3 Cys-induced CCL20/MIP3α secretion as well as partially reversed the inhibitory effect of E 2 on TNF-α production by epithelial cells. Overall, these results indicate that E 2 regulates the production of TNF-α and CCL20/MIP3α by UEC in the absence as well as presence of PAMP. Since CCL20/MIP3α has antimicrobial activity and is chemotactic for immune cells, these studies suggest that regulation of CCL20/MIP3α and TNF-α by E 2 and PAMP may have profound effects on innate and adaptive immune responses to microbial challenge in the female reproductive tract." @default.
- W2103911193 created "2016-06-24" @default.
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- W2103911193 date "2005-07-01" @default.
- W2103911193 modified "2023-10-16" @default.
- W2103911193 title "Effects of Estradiol on Lipopolysaccharide and Pam <sub>3</sub> Cys Stimulation of CCL20/Macrophage Inflammatory Protein 3 Alpha and Tumor Necrosis Factor Alpha Production by Uterine Epithelial Cells in Culture" @default.
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- W2103911193 doi "https://doi.org/10.1128/iai.73.7.4231-4237.2005" @default.
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