Biol Reprod
Institut National de la Santé Et de la Recherche Médicale (INSERM), U866, Lipides, Nutrition, Cancer, Dijon, France.
Published: February 2013
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.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1095/biolreprod.112.104844 | DOI Listing |
Protein Pept Lett
January 2025
Department of General Surgery, The Second Hospital of Dalian Medical University, Dalian, China.
Background: MARVEL domain-containing 1 (MARVELD1) has been implicated in the progression of several cancers, but its role in pancreatic adenocarcinoma (PAAD) remains poorly understood.
Methods: RNA-seq data from the TCGA-PAAD and GTEx-Pancreas cohorts were analyzed to assess MARVELD1 expression. Stable MARVELD1 knockdown and overexpression were conducted in BxPC3 and PANC-1 cells.
Vet Res Commun
January 2025
Biochemistry, Veterinary Biosciences Department, Veterinary Faculty, Universidad de la República, Ruta 8, Km 18 y Ruta 102, Montevideo, 13000, Uruguay.
The aim was to study the effect of long-acting analogue of oxytocin (Carbetocin) on cervical collagenolysis of MAP-eCG synchronized ewes. At the expected time of artificial insemination, five ewes were slaughtered (n = 5) and their cervical explants (100-200 mg) were incubated during 12 h with MEM supplemented with 0, 8, 16, 32 and 64 ng/mL of Cb. Activities of activated and latent forms of matrix metalloproteinases-2 and - 9 (MMP-2 and MMP-9, respectively) in the supernatant were determined by a SDS-PAGE zymography and prostaglandin E2 concentration by immunoassay.
View Article and Find Full Text PDFBurns Trauma
January 2025
Department of Plastic Surgery, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, No. 16766, Jingshi Road, Lixia District, Jinan, Shandong 250014, P. R. China.
Background: Skin innervation is very important for normal wound healing, and receptor activity-modifying protein 1 (RAMP1) has been reported to modulate calcitonin gene-related peptide (CGRP) receptor function and thus be a potential treatment target. This study aimed to elucidate the intricate regulatory effect of RAMP1 on skin fibroblast function, thereby addressing the existing knowledge gap in this area.
Methods: Immunohistochemical staining and immunofluorescence (IF) staining were used to measure the dynamic changes in the expression of RAMP1 and α-smooth muscle actin (α-SMA) in skin wound tissue in mice.
Basic Clin Pharmacol Toxicol
February 2025
Department of Pharmacology, Venkateshwara College of Pharmacy, Meerut, India.
Background: Rheumatoid arthritis (RA) is a long-term inflammatory autoimmune disease that damages cartilage and synovial membranes while also affecting bones and joints. The aim of the current study was to investigate the antiarthritic effect of gossypin against collagen-induced arthritis (CIA) in rats.
Methods: Intraperitoneal administration of Type II collagen (2 mg/mL) was used to induce arthritis in the rats, followed by oral administration of gossypin (5, 10 and 15 mg/kg) for 28 days.
ACS Appl Bio Mater
January 2025
Institute of Nano Science and Technology (INST), Sector-81, Mohali, Punjab 140306, India.
Tuberculosis (TB) triggers a robust immune response, which leads to significant destruction of the lung tissue at the site of infection, aiding in the transmission of (Mtb) to the hosts. The excessive inflammatory response contributes heavily to extracellular matrix (ECM) damage, which is linked to high mortality rates among TB patients. Matrix metalloproteinases (MMPs), particularly MMP-2 and MMP-9, are pivotal in the breakdown of the ECM, worsening tissue destruction.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!
© LitMetric 2025. All rights reserved.