当前位置： SCI文献检索 > MOLECULAR AND CELLULAR ENDOCRINOLOGY期刊下所有文献 > Inhibition of lysyl oxidase by prostaglandin E2 via EP2/EP4 receptors in human amnion fibroblasts: Implications for parturition.

Inhibition of lysyl oxidase by prostaglandin E2 via EP2/EP4 receptors in human amnion fibroblasts: Implications for parturition.

Abstract：

:The underlying mechanism leading to rupture of the membranes at parturition is not fully understood. Lysyl oxidase (LOX) cross-links collagen fibrils thereby increasing the tensile strength of the membranes. Thus, understanding the regulation of LOX expression may be of crucial importance for elucidation of the process of rupture of the fetal membranes. Prostaglandin E2 (PGE2), mainly produced in the amnion, plays crucial roles during human parturition. However it is not known whether PGE2 regulates LOX expression in the fetal membranes. Using primary human amnion fibroblasts, we showed that addition of PGE2 decreased LOX mRNA and protein levels, which were blocked by inhibition of EP2/EP4 receptors and the receptor-coupled cAMP/PKA pathway. EP2/EP4 receptor agonists and stimulators of the cAMP/PKA pathway consistently decreased LOX expression. Furthermore, PGE2 induced cyclo-oxygenase-2 (COX-2) expression, a key enzyme in PGE2 production, via an EP2 and EP4 receptor-coupled cAMP/PKA pathway. Small interfering RNA-mediated knock-down of COX-2 expression significantly increased the basal expression of LOX. In addition, an increase in COX-2 and a reciprocal decrease in LOX abundance occurred in amnion tissue following labor at term. In conclusion, we have revealed a feed-forward loop of induction of COX-2 and reduction in LOX expression by PGE2 acting via an EP2/EP4 receptor-coupled cAMP/PKA pathway in human amnion fibroblasts toward the end of gestation, which may play a significant role in the rupture of fetal membranes.

journal_name

Mol Cell Endocrinol

journal_title

Molecular and cellular endocrinology

authors

Liu C,Zhu P,Wang W,Li W,Shu Q,Chen ZJ,Myatt L,Sun K

doi

10.1016/j.mce.2016.01.022

subject

Has Abstract

pub_date

2016-03-15 00:00:00

pages

118-27

eissn

0303-7207

issn

1872-8057

pii

S0303-7207(16)30023-5

journal_volume

424

pub_type

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