Regulation of matrilysin expression in endothelium by fibroblast growth factor-2

Biochem Biophys Res Commun. 2006 Apr 14;342(3):725-33. doi: 10.1016/j.bbrc.2006.02.011. Epub 2006 Feb 14.

Abstract

Matrilysin (MMP7) is a secreted matrix metalloproteinase, which contributes to angiogenesis by breaking down basement membranes. We show that the angiogenic factor FGF-2 induces MMP7 expression in human endothelial cells. The promoter contains a Lef/Tcf consensus sequence, but using wildtype or Lef/Tcf-mutated promoter constructs, FGF-2-induced MMP7 reporter activity is independent from Lef/Tcf sites. Instead, we show that overexpression of a dominant negative Stat3 mutant reduces FGF-2-mediated MMP7 promoter activity. However, Stat3 does not bind to the MMP7 promoter, but activates MMP7 gene expression indirectly via AP-1. This is confirmed by MMP7 promoter constructs with mutated AP-1 sites which did not respond to FGF-2 and by siRNAs against Stat1 and Stat3, which repressed FGF-2-induced MMP7 protein expression. In conclusion, we show that FGF-2-induced MMP7 expression in endothelium depends on AP-1 and FGF-2 signaling to AP-1 involves a Stat1/3-dependent pathway.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Binding Sites / genetics
  • Culture Media, Serum-Free
  • Endothelial Cells / metabolism
  • Endothelium / drug effects*
  • Endothelium / metabolism*
  • Fibroblast Growth Factor 2 / pharmacology*
  • Gene Expression Regulation / drug effects*
  • Humans
  • Lymphoid Enhancer-Binding Factor 1 / genetics
  • Matrix Metalloproteinase 7 / genetics*
  • Models, Genetic
  • Promoter Regions, Genetic / genetics
  • Protein Binding
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • RNA, Small Interfering / genetics
  • STAT1 Transcription Factor / metabolism
  • STAT3 Transcription Factor / metabolism
  • Transcription Factor AP-1 / metabolism

Substances

  • Culture Media, Serum-Free
  • LEF1 protein, human
  • Lymphoid Enhancer-Binding Factor 1
  • RNA, Messenger
  • RNA, Small Interfering
  • STAT1 Transcription Factor
  • STAT3 Transcription Factor
  • Transcription Factor AP-1
  • Fibroblast Growth Factor 2
  • Matrix Metalloproteinase 7