Membrane-type 1 matrix metalloproteinase modulates focal adhesion stability and cell migration
Takahisa Takino1, Yumi Watanabe, Miyuki Matsui
1Department of Molecular Virology and Oncology, Cancer Research Institute, Kanazawa University, 13-1 Takara-machi, Kanazawa 920-0934, Japan. ttakino@kenroku.kanazawa-u.ac.jp
Experimental Cell Research
|February 14, 2006
Summary
Membrane-type 1 matrix metalloproteinase (MT1-MMP) facilitates cell migration by degrading the extracellular matrix and regulating focal adhesions. This process involves focal adhesion turnover and extracellular signal-regulated kinase (ERK) activation, crucial for cell movement.
Area of Science:
- Cell Biology
- Biochemistry
- Molecular Biology
Background:
- Membrane-type 1 matrix metalloproteinase (MT1-MMP) is implicated in cell migration and extracellular signal-regulated kinase (ERK) pathway activation.
- MT1-MMP influences the extracellular matrix (ECM), affecting cell adhesion and motility.
Purpose of the Study:
- To investigate the role of MT1-MMP in fibronectin-induced cell migration.
- To elucidate the mechanisms by which MT1-MMP modulates focal adhesions, integrin clustering, and ERK activation.
Main Methods:
- Gene transfection of MT1-MMP into HeLa cells.
- Inhibition of MT1-MMP activity using BB94 and expression of MT1-MMP carboxyl-terminal domain.
- Analysis of cell migration, fibronectin degradation, focal adhesion formation, integrin clustering, and ERK/FAK phosphorylation.
Main Results:
- MT1-MMP expression promoted fibronectin-induced cell migration, fibronectin degradation, and reduced stable focal adhesions.
- MT1-MMP attenuated fibronectin-induced integrin clustering, an effect reversed by BB94.
- Inhibition of MT1-MMP suppressed fibronectin lysis and cell migration, promoting stable focal adhesions and altering FAK/ERK signaling.
Conclusions:
- ECM degradation by MT1-MMP promotes focal adhesion turnover, which is essential for subsequent ERK activation and cell migration.
- MT1-MMP plays a critical role in regulating cell motility through ECM remodeling and integrin-mediated signaling pathways.
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