No abstract available.
Colorectal Neoplasms ; Matrix Metalloproteinases

The matrix metalloproteinases (MMPs) are a large family of proteolytic enzymes, which are involved in the degradation of many different components of the extracellular matrix. The MMPs have been classified into different groups including collagenases, gelatinases, stromelysins, membrane-type MMPs, etc. There is increasing evidence to indicate that MMPs play important roles in tumour invasion and metastasis. Moreover, MMPs not only play a direct role in tumour invasion by facilitating extracellular matrix degradation, but as a consequence they also have an important role in maintaining the tumour micro-environment and thus promoting tumour growth. In this paper, the structure, function and regulation of MMPs were reviewed.
Matrix Metalloproteinases ; chemistry ; physiology

Matrix Metalloproteinases ; Neovascularization, Pathologic ; Neovascularization, Physiologic

Matrix metalloproteinases (MMPs) have the ability to degrade extracellular matrix components. They abnormally express in a variety of solid tumors and hematologic malignancies, and play an important role in tumor invasion and metastasis through extracellular matrix degradation, which closely relates with the progression and prognosis of the malignant disease. This article reviews progress of study on the mechanism of MMP underlying the pathogenesis of hematologic malignancies, including structure of MMP, regulation mechanism of MMP and its relation with proliferation and differentiation of hematopoietic stem cells (HSC), angiogenesis and tumor immunology and so on.
Hematologic Neoplasms ; pathology ; Humans ; Matrix Metalloproteinases

No abstract available.
Gingival Crevicular Fluid* ; Humans ; Matrix Metalloproteinase 1* ; Matrix Metalloproteinases* ; Periodontitis*

Chronic rhinosinusitis is characterized by chronic inflammation of the nasal and paranasal mucosae and is currently classified into two major subgroups on the basis of the absence or presence of nasal polyps. A distinct set of inflammatory and remodeling factors has been found elevated in chronic rhinosinusitis. Transforming growth factor-beta and matrix metalloproteinases are critical factors involved in the remodeling process. Transforming growth factor-beta has been implicated as an important factor in remodeling processes involved in chronic rhinosinusitis, and serves as a main switch for different remodeling patterns in chronic rhinosinusitis.
Extracellular Matrix ; Inflammation ; Matrix Metalloproteinases ; Mucous Membrane ; Nasal Polyps

BACKGROUND/AIMS: Matrix metalloproteinases (MMP)-2 and -9 can degrade essential components of vascular integrity. The aim of this study was to investigate the association between those MMPs and variceal bleeding (VB). METHODS: Fifteen controls, 12 patients with acute ulcer bleeding (UB) group, 37 patients with varix (V group), and 35 patients with acute VB group were enrolled. Serum was obtained to measure MMP-2 and -9 activity by zymogram protease assays. RESULTS: The activity levels of these compounds were compared with the controls' median value. The median MMP-9 activity was 1.0 in controls, 1.05 in the UB group, 0.43 in the V group, and 0.96 in the VB group. The level of MMP-9 activity was higher in the VB group than in the V group (p<0.001). In the VB group, there was a signifi cant decrease in MMP-9 activity over time after bleeding (p<0.001). The median MMP-2 activity level was 1.0 in controls, 1.01 in the UB group, 1.50 in the V group, and 1.55 in the VB group. The level of MMP-2 activity was similar in the VB and V groups. CONCLUSIONS: The level of MMP-9 activity increased in association with VB. The role of MMP-9 in the pathogenesis of VB should be verified.
Esophageal and Gastric Varices ; Hemorrhage ; Humans ; Matrix Metalloproteinase 2 ; Matrix Metalloproteinase 9 ; Matrix Metalloproteinases ; Ulcer ; Varicose Veins

With the effects of the mechanics and biological factors, the imbalance between the degradation and synthesis of chondrocyte, extracelluar matrix and subchondral bone leads to the osteoarthritis. The imbalance between MMPs and TIMPs caused by biomechanical abnormality is the key factor of osteoarthritis. This review will focus on the stress and their roles in the metabolism of the cartilage matrix.
Cartilage ; metabolism ; Humans ; Matrix Metalloproteinases ; metabolism ; Osteoarthritis ; metabolism ; Stress, Mechanical ; Tissue Inhibitor of Metalloproteinases ; metabolism

Biomarkers ; Humans ; Matrix Metalloproteinases ; Myocardial Infarction ; Prognosis ; Reperfusion ; Tissue Inhibitor of Metalloproteinase-1 ; Tissue Inhibitor of Metalloproteinases

The limited durability of resin-dentin bonds severely compromises the longevity of composite resin restorations. Resin-dentin bond degradation might occur via degradation of water-rich and resin sparse collagen matrices by host-derived matrix metalloproteinases (MMPs). This review article provides overview of current knowledge of the role of MMPs in dentin matrix degradation and four experimental strategies for extending the longevity of resin-dentin bonds. They include: (1) the use of broad-spectrum inhibitors of MMPs, (2) the use of cross-linking agents for silencing the activities of MMPs, (3) ethanol wet-bonding with hydrophobic resin, (4) biomimetic remineralization of water-filled collagen matrix. A combination of these strategies will be able to overcome the limitations in resin-dentin adhesion.
Biomimetics ; Chlorhexidine ; Collagen ; Dentin ; Ethanol ; Longevity ; Matrix Metalloproteinases