Search results for "MMP9"

Roles of p53, NF-κB and the androgen receptor in controlling NGAL expression in prostate cancer cell lines

2018

Neutrophil gelatinase-associated lipocalin (NGAL a.k.a lipocalin 2, lnc2) is a secreted protein which can form a complex with matrix metalloproteinase-9 (MMP9). This MMP9/NGAL complex has been associated with metastasis. MMP9 and NGAL are detected in the urine of patients afflicted with many different types of cancer, including prostate cancer. The effects of p53, NF-κB and the androgen receptor (AR) on the expression of NGAL was examined in four prostate cancer cell lines. Prostate cancer cell lines that are AR negative and expressed either mutant or no p53 (DU145 and PC3) displayed higher levels of NGAL expression compared to the prostate cancer cell lines (LNCaP and 22Rv-1) which are AR …

Mesoangioblasti di topo producono e rilasciano nello spazio extracellulare vescicole di membrana contenenti MMP9 e FGF2 in forma attiva

2009

Involvement of multiple myeloma cell-derived exosomes in osteoclast differentiation

2015

Bone disease is the most frequent complication in multiple myeloma (MM) resulting in osteolytic lesions, bone pain, hypercalcemia and renal failure. In MM bone disease the perfect balance between bone-resorbing osteoclasts (OCs) and bone-forming osteoblasts (OBs) activity is lost in favour of OCs, thus resulting in skeletal disorders. Since exosomes have been described for their functional role in cancer progression, we here investigate whether MM cell-derived exosomes may be involved in OCs differentiation. We show that MM cells produce exosomes which are actively internalized by Raw264.7 cell line, a cellular model of osteoclast formation. MM cell-derived exosomes positively modulate pre-…

SAR150640, a selective β3-adrenoceptor agonist, prevents human myometrial remodelling and activation of matrix metalloproteinase in an in vitro model…

2010

Background and purpose:  The uterine pathophysiology underlying inflammatory conditions such as chorioamnionitis remains largely unclear. As we have shown that β3-adrenoceptors act as regulators of myometrial inflammation, we wanted to investigate the potential role of β3-adrenoceptors in preventing uterine remodelling induced by inflammation. Experimental approach:  The consequences of human chorioamnionitis on myometrial remodelling were characterized by Sirius Red staining and metalloproteinase (MMP) expression, and compared with the effects of incubating human myometrial samples with Escherichia coli lipopolysaccharide (LPS) in vitro. We also assessed the effect of SAR150640, a selectiv…

Integrated multi-omics investigations of metalloproteinases in colon cancer: Focus on MMP2 and MMP9

2021

Colorectal cancer (CRC) develops by genetic and epigenetic alterations. However, the molecular mechanisms underlying metastatic dissemination remain unclear and could benefit from multi-omics investigations of specific protein families. Matrix metalloproteinases (MMPs) are proteolytic enzymes involved in ECM remodeling and the processing of bioactive molecules. Increased MMP expression promotes the hallmarks of tumor progression, including angiogenesis, invasion, and metastasis, and is correlated with a shortened survival. Nevertheless, the collective role and the possible coordination of MMP members in CRC are poorly investigated. Here, we performed a multi-omics analysis of MMP expression…

Membrane vesicles containing matrix metalloproteinase-9 and fibroblast growth factor-2 are released into the extracellular space from mouse mesoangio…

2010

Certain proteins, including fibroblast growth factor-2 (FGF-2) and matrix metalloproteinase-9 (MMP-9), have proved very effective in increasing the efficacy of mesoangioblast stem cell therapy in repairing damaged tissue. We provide the first evidence that mouse mesoangioblast stem cells release FGF-2 and MMP-9 in their active form through the production of membrane vesicles. These vesicles are produced and turned over continuously, but are stable for some time in the extracellular milieu. Mesoangioblasts shed membrane vesicles even under oxygen tensions that are lower than those typically used for cell culture and more like those of mouse tissues. These findings suggest that mesoangioblast…

Expression of remodelling enzymes (MMP2-MMP9) in samples of salivary gland's tumors

2010

Vitamin A deficiency alters the structure and collagen IV composition of rat renal basement membranes.

2005

Retinoids can modulate the expression of extracellular matrix (ECM) proteins with variable results depending on other contributing factors. Because changes in these proteins may alter the composition and impair the function of specialized ECM structures such as basement membranes (BMs), we studied the effects of vitamin A deficiency on renal BMs during the growing period. Newborn male rats were fed a vitamin A-deficient (VAD) diet for 50 d. The ultrastructure of renal BMs was analyzed by electron microscopy. Total collagen IV, the different alpha(IV) chains, matrix degrading metalloproteinases (MMP), and tissue inhibitors of metalloproteinases (TIMP) were quantified by immunocytochemistry a…

Effects of Leptin on Lipopolysaccharide-Induced Remodeling in an In Vitro Model of Human Myometrial Inflammation1

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…

AGE6. Skin Ageing: Focus on the Role of Inflammatory Genetic Factors in Cutaneous Neoplasia

2014

AGE6. Skin Ageing: Focus on the Role of Inflammatory Genetic Factors in Cutaneous Neoplasia C. M. Gambino1, F. Crapanzano1, G. Accardi1, A. Aiello1, C. Virruso1, G. Pistone1, M. R. Bongiorno1, D. Lio1, C. R. Balistreri1, G. Candore1 1University of Palermo, Palermo, Italy Background: Skin aging is a complex process that involves intrinsic and exogenous causes. Photo-oxidative damage caused by UV is the leading cause of extrinsic aging of the skin, known as photo-ageing. UV damages can be linked mostly to overproduction of ROS that induces a complex molecular cascade able to accelerate physiological aging, determining a typical dermal/epidermal inflammation with an increased risk of getting s…