Reorganization of myometrial extracellular matrix (ECM) is essential for the uterus to achieve powerful synchronous contractions during labor. Remodeling of the ECM has been implicated in membrane rupture and cervical ripening. Because maternal obesity is associated with both delivery disorders and elevated circulating leptin levels, this study aimed to assess the ability of leptin to interfere with lipopolysaccharide (LPS)-induced myometrial ECM remodeling. Myometrial biopsy samples were obtained from women undergoing cesarean delivery before labor onset. Myometrial explants were incubated for 48 h with LPS and leptin. LPS challenge was associated with a marked decrease in collagen content and in heat shock protein (HSP) 47 expression, reflecting a disruption in collagen synthesis and an increase in matrix metalloproteinase (MMP) 2 and MMP9 activity and in MMP2, MMP9, and MMP13 expression. Leptin prevented an LPS-induced decrease in myometrial collagen content in a concentration-dependent manner. This effect was associated with an increase in HSP47 expression and a decrease in MMP2 and MMP9 activity and expression. These results show that leptin prevents LPS-induced myometrial remodeling through collagen synthesis stimulation and inhibition of MMP2 and MMP9. Our study strengthens the hypothesis that leptin plays a role in the development of obesity-related delivery disorders.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 88 • No. 2