alexa Protein kinase C-delta mediates adventitial cell migration through regulation of monocyte chemoattractant protein-1 expression in a rat angioplasty model.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): Si Y, Ren J, Wang P, Rateri DL, Daugherty A,

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Abstract OBJECTIVE: The adventitia is increasingly recognized as an important player during the development of intimal hyperplasia. However, the mechanism of adventitial cell recruitment to the subintimal space remains largely undefined. We have shown previously that gene transfer of protein kinase C-delta (PKCδ) increases apoptosis of smooth muscle cells following balloon injury. In the current study, we investigated a potential role of PKCδ in regulating the recruitment of adventitial cells. METHODS AND RESULTS: Conditioned media from PKCδ-overexpressing smooth muscle cells stimulated migration and CCR2 expression of adventitial fibroblasts through a MCP-1 dependent mechanism. Following balloon injury of rat carotid arteries, overexpression of PKCδ in smooth muscle cells significantly increased MCP-1 and CCR2 expression and the number of adventitia-originated cells detected in the neointima. Administration of an anti-MCP-1 antibody markedly diminished the recruitment of adventitial cells. Combined PKCδ overexpression and anti-MCP-1 inhibited intimal hyperplasia more effectively than either approach alone. CONCLUSIONS: Our data suggest that PKCδ regulates recruitment of adventitial cells to the neointima via a mechanism involving upregulation of the MCP-1/CCR2 signaling axis in injured arteries. Blockage of MCP-1 while enhancing apoptosis may serve as a potential therapeutic strategy to attenuate intimal hyperplasia.
This article was published in Arterioscler Thromb Vasc Biol and referenced in Journal of Antivirals & Antiretrovirals

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