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Establishment of an MT4-MMP-deficient mouse strain representing an efficient tracking system for MT4-MMP/MMP-17 expression in vivo using β-galactosidase.
- Source :
- Genes to Cells; Sep2007, Vol. 12 Issue 9, p1091-1100, 10p, 4 Color Photographs, 1 Diagram, 2 Graphs
- Publication Year :
- 2007
-
Abstract
- The biological functions of membrane-type 4 matrix metalloproteinase (MT4-MMP/MMP-17) are poorly understood because of the lack of a sensitive system for tracking its expression in vivo. We established a mutant mouse strain ( Mt4-mmp<superscript>−/–</superscript>) in which Mt4-mmp was replaced with a reporter gene encoding β-galactosidase (LacZ). Mt4-mmp<superscript>−/–</superscript> mice had normal gestations, and no apparent defects in growth, life span and fertility. Using LacZ as a marker, we were able to monitor the expression and promoter activity of Mt4-mmp for the first time in vivo. The tissue distribution of Mt4-mmp mRNA correlated with LacZ expression, and we showed that Mt4-mmp is expressed primarily in cerebrum, lung, spleen, intestine and uterus. We identified LacZ-positive neurons in the cerebrum, smooth muscle cells in the intestine and uterus, and macrophages located in the lung alveolar or intraperitoneal space. Contrary to the reported role of MT4-MMP as a tumor necrosis factor-α (TNF-α) sheddase, the lipopolysaccharide (LPS)-induced release of TNF-α from Mt4-mmp<superscript>−/–</superscript>macrophages was similar to that in wild-type cells, and expression of Mt4-mmp mRNA was repressed following LPS stimulation. Thus, we have established a mutant mouse strain for analyzing the physiological functions of MT4-MMP, which also serves as a sensitive system for monitoring and tracking the expression of MT4-MMP in vivo. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13569597
- Volume :
- 12
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Genes to Cells
- Publication Type :
- Academic Journal
- Accession number :
- 26418900
- Full Text :
- https://doi.org/10.1111/j.1365-2443.2007.01110.x