alexa Overexpression of allograft inflammatory factor-1 promotes proliferation of vascular smooth muscle cells by cell cycle deregulation.


Journal of Clinical & Experimental Cardiology

Author(s): Autieri MV, Carbone CM

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Abstract Allograft inflammatory factor-1 (AIF-1) is not present in normal arteries, but its expression is induced in vascular smooth muscle cells (VSMCs) in several models of arterial injury. The proliferation of VSMCs is a major component of neointimal hyperplasia in many arteriopathies, and the purpose of this study was to determine the role of AIF-1 in the growth of VSMCs. Transfection and constitutive expression of AIF-1 in a primary and a rat VSMC line results in enhanced growth of those cells as measured by cell number and is proportional to the amount of AIF-1 expressed. Constitutive expression of AIF-1 results in a shorter cell cycle, as measured by flow cytometry, and aberrant expression of cell cycle proteins, as determined by Western blot. AIF-1 overexpression also permits growth of these cells in serum-reduced media. Collectively, these data suggest that AIF-1 may participate in the progression of vascular proliferative disease on the basis of its ability to regulate the growth of VSMCs.
This article was published in Arterioscler Thromb Vasc Biol and referenced in Journal of Clinical & Experimental Cardiology

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