alexa ERK1 2 mediates PDGF-BB stimulated vascular smooth muscle cell proliferation and migration on laminin-5.
Oncology

Oncology

Journal of Cancer Science & Therapy

Author(s): Kingsley K, Huff JL, Rust WL, Carroll K, Martinez AM,

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Abstract During restenosis following arterial injury, vascular smooth muscle cells (VSMCs) form a neointimal layer in arteries by changing from a differentiated, contractile phenotype to a dedifferentiated, migratory, and proliferative phenotype. Several growth factors, cytokines, and extracellular matrix components released following injury have been implicated in these phenotypic changes. We have recently detected the expression of laminin-5, an ECM protein found predominantly in epithelial tissues, in the arterial vasculature. Here we report that ln-5 expression by VSMC is upregulated by platelet-derived growth factor (PDGF-BB), epidermal growth factor, basic fibroblast growth factor, and transforming growth factor-beta1. Adhesion to ln-5 specifically enhances PDGF-BB-stimulated VSMC proliferation and migration. PD98059, a specific inhibitor of the ERK1/2 members of the Mitogen Activated Protein kinase family, increases both VSMC adhesion to ln-5 and blocks PDGF-BB-stimulated VSMC migration on ln-5. These results suggest that adhesion to ln-5 mediates a PDGF-BB-stimulated VSMC response to vascular injury via an ERK1/2 signaling pathway. (c) 2002 Elsevier Science (USA). This article was published in Biochem Biophys Res Commun and referenced in Journal of Cancer Science & Therapy

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