Published in:
Open Access
01-06-2017
Beyond COX-1: the effects of aspirin on platelet biology and potential mechanisms of chemoprevention
Authors:
Argentina Ornelas, Niki Zacharias-Millward, David G. Menter, Jennifer S. Davis, Lenard Lichtenberger, David Hawke, Ernest Hawk, Eduardo Vilar, Pratip Bhattacharya, Steven Millward
Published in:
Cancer and Metastasis Reviews
|
Issue 2/2017
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Abstract
After more than a century, aspirin remains one of the most commonly used drugs in western medicine. Although mainly used for its anti-thrombotic, anti-pyretic, and analgesic properties, a multitude of clinical studies have provided convincing evidence that regular, low-dose aspirin use dramatically lowers the risk of cancer. These observations coincide with recent studies showing a functional relationship between platelets and tumors, suggesting that aspirin’s chemopreventive properties may result, in part, from direct modulation of platelet biology and biochemistry. Here, we present a review of the biochemistry and pharmacology of aspirin with particular emphasis on its cyclooxygenase-dependent and cyclooxygenase-independent effects in platelets. We also correlate the results of proteomic-based studies of aspirin acetylation in eukaryotic cells with recent developments in platelet proteomics to identify non-cyclooxygenase targets of aspirin-mediated acetylation in platelets that may play a role in its chemopreventive mechanism.