Cell lineage specific expression of matrix metalloproteinases -2 and -9 in transgenic mice
2004
Mammalian extracellular matrix metalloproteinases, MMPs, are a family of enzymes capable of degrading components of the connective tissue. The in vivo regulation of the cell lineage-specific expression of MMPs, however, is not well known. This study used transgenic mice to identify cellspecific elements in the upstream regulatory regions of MMP-2 and MMP-9. Transgenic mice were generated by pronuclear microinjections into fertilised oocytes using lacZ as a reporter gene. The reporter gene constructs containing varying lengths of the MMP-9 5'-upstream region revealed an area that allowed for expression in osteoclasts and migrating keratinocytes, the cells that also express MMP-9 in vivo. The sequence driving the cell specific expression included the nucleotides from -
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