Journal
INTERNATIONAL JOURNAL OF CANCER
Volume 123, Issue 11, Pages 2473-2479Publisher
WILEY
DOI: 10.1002/ijc.23930
Keywords
small leucine-rich proteoglycans; EGF receptor; IGF-I receptor; cancer growth; LRP-1; TGF beta; LRIGI
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Decorin, the prototype member of the small leucine-rich proteoglycans. resides in the tumor microenvironment and affects the biology of various types of cancer by downregulating the activity of several receptors involved in cell growth and survival. Decorin binds to and modulates the signaling of the epidermal growth factor receptor and other members of the ErbB family of receptor tyrosine kinases. It exerts its antitumor activity by a dual mechanism: via inhibition of these key receptors through their physical downregulation coupled with attenuation of their signaling, and by binding to and sequestering TGF beta. Decorin also modulates the insulin-like growth factor receptor and the low-density lipoprotein receptor-related protein 1. which indirectly affects die TGF beta receptor pathway. When expressed in tumor xenograft-bearing mice or injected systemically, decorin inhibits both primary tumor growth and metastatic spreading. In this review, we summarize the latest reports on decorin and related molecules that are relevant to cancer anti bring forward the idea of decorin as an anticancer therapeutic and possible prognostic marker for patients affected by various types of tumors. We also discuss the role of lumican and LRIG1, a novel cell growth inhibitor homologous to decorin. (C) 2008 Wiley-Liss. Inc.
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