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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Decorin evokes protracted internalization and degradation of the epidermal growth factor receptor via caveolar endocytosis.

Decorin inhibits the epidermal growth factor receptor (EGFR) by down-regulating its tyrosine kinase activity, thereby blocking the growth of a variety of transformed cells and tumor xenografts. In this study we provide evidence that decorin directly binds to the EGFR causing its dimerization, internalization, and ultimately its degradation. Using various pharmacological agents to disrupt clathrin-dependent and -independent endocytosis, we demonstrate that decorin evokes a protracted internalization of the EGFR primarily via caveolar-mediated endocytosis. In contrast to EGF, decorin targets the EGFR to caveolae, but not to early or recycling endosomes. Ultimately, however, both EGF- and decorin-induced pathways converge into late endosomes/lysosomes for final degradation. Thus, we have discovered a novel biological mechanism for decorin that could explain its anti-proliferative and anti-oncogenic mode of action.[1]

References

  1. Decorin evokes protracted internalization and degradation of the epidermal growth factor receptor via caveolar endocytosis. Zhu, J.X., Goldoni, S., Bix, G., Owens, R.T., McQuillan, D.J., Reed, C.C., Iozzo, R.V. J. Biol. Chem. (2005) [Pubmed]
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