## Membrane -type 1 matrix metalloproteinase (MT1-MMP) is a presumed activator of MMP2, which is one of the major proteinases in tumor cell invasion. In this study, we determined the clinico-pathologic significance of MT1-MMP expression in 68 human gastric carcinomas. The tumor-normal ratio (T/N r
Regulation of TIMP-2, MT1-MMP, and MMP-2 expression during C2C12 differentiation
โ Scribed by Gentian Lluri; Diane M. Jaworski
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 757 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0148-639X
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โฆ Synopsis
Abstract
Matrix metalloproteinases (MMPs) are zincโdependent proteases capable of degrading extracellular matrix components. The activity of these proteases is tightly regulated through the actions of the tissue inhibitors of metalloproteinases (TIMPs). Although the regulation of MMPs and TIMPs during physiological and pathological remodeling has been investigated in a number of systems, almost nothing is known about their role in skeletal muscle differentiation. To investigate the role of MMPโmediated proteolysis during myogenesis, the regulation of TIMPโ2, MT1โMMP, and MMPโ2 expression was investigated during differentiation of the mouse myoblastic C2C12 cell line. We show that this trio is upregulated coincident with myogenesis. The more diffuse spatial distribution of TIMPโ2 relative to MT1โMMP and MMPโ2 suggests that TIMPโ2 may exert MMPโindependent functions during myogenesis. Elucidating the regulation of these molecules during muscle differentiation in vitro may lead to a better understanding of their role in pathological processes in muscle tissue in vivo. Muscle Nerve, 2005
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