MT1-MMP cleavage of the antiangiogenic proteoglycan decorin: role in corneal angiogenesis.

Abstract:

PURPOSE:Decorin is a small chondroitin sulfate proteoglycan that inhibits vascular endothelial cell migration and tube formation. Membrane type 1-matrix metalloproteinase (MT1-MMP) has been shown to be an important angiogenic enzyme in the cornea. We evaluated the specific role of MT1-MMP in decorin cleavage in the cornea. METHODS:Western blotting was used to evaluate decorin degradation by MT1-MMP. Aortic ring tube formation assays were used to assay the inhibitory effect of decorin and the stimulatory effect of MT1-MMP on vascular endothelial cells in vitro. Corneal micropocket assays using basic fibroblast growth factor (bFGF) were used to assess changes in the levels of decorin and MT1-MMP. RESULTS:MT1-MMP cleaves decorin in a time- and concentration-dependent manner in vitro. MT1-MMP levels were upregulated after in vivo bFGF pellet implantation in the cornea, and decorin cleavage products were detected in bFGF-implanted corneas but not in normal corneas. MT1-MMP reduced the inhibitory effects of decorin on aortic ring tube formation in vitro. CONCLUSION:MT1-MMP may play an essential role in angiogenesis through proteolytic processing of decorin in the cornea.

journal_name

Cornea

journal_title

Cornea

authors

Mimura T,Chang JH,Kim TI,Onguchi T,Kojima T,Sakimoto T,Azar DT

doi

10.1097/ICO.0b013e31822816e0

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

S45-9

eissn

0277-3740

issn

1536-4798

pii

00003226-201110001-00010

journal_volume

30 Suppl 1

pub_type

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