Add time:08/17/2019         Source:sciencedirect.com

Because of the lack of function-blocking anti-integrin antibodies that react with nonprimate species, the study of the role of integrins in in vivo animal models of atherosclerosis has been limited. In contrast, peptides or small molecules have shown less species specificity and thus may be better tools to use. In an attempt to identify integrin antagonists of potential use against smooth muscle response to injury, we investigated the role of human smooth muscle cell interactions with fibrin by using a panel of integrin antagonists consisting of the snake venom disintegrin, Kistrin, as well as cyclic peptides with well-defined integrin antagonists activities. We demonstrate that Kistrin, a disintegrin that inhibits β1, β2, β3, and β5 integrin interactions, had the most potent inhibitory effect. Based on our results, Kistrin or peptides with similar pan-integrin selectivity patterns are prime candidates for use as anti-integrin antagonists in further studies of atherosclerosis and restenosis.

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