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We analyzed GPVI-activated platelets from ST-elevation myocardial infarction (STEMI) patients and matched stable coronary artery disease (SCAD) controls in order to provide novel clues on the degree of involvement of GPVI signaling in the acute event. Firstly, platelets were isolated from systemic venous blood and activated with the GPVI specific agonist CRP (collagen-related peptide). STEMI and SCAD samples were compared by a phosphoproteomics approach. Validations were by immunoblotting in systemic and intracoronary blood from independent cohorts of patients. Twenty-six differentially regulated proteins were identified when comparing CRP-activated systemic platelets from STEMI and SCAD patients, 4 of which were selected for validation studies: PLC\u02632, G6f, SLP-76, and Dok-2. Immunoblot analyses showed these four proteins had higher tyrosine phosphorylation levels in response to CRP in platelets from STEMI patients, being these levels more pronounced at the culprit site of coronary artery occlusion. Moreover, platelet aggregation studies showed a higher response to GPVI agonists in STEMI patients compared to SCAD controls. In conclusion, we show an altered activation state of GPVI signaling in STEMI patients, confirming this receptor as a promising anti-thrombotic target for myocardial infarction.<\/jats:p>","DOI":"10.1038\/srep39603","type":"journal-article","created":{"date-parts":[[2016,12,22]],"date-time":"2016-12-22T12:42:36Z","timestamp":1482410556000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Alteration of platelet GPVI signaling in ST-elevation myocardial infarction patients demonstrated by a combination of proteomic, biochemical, and functional approaches"],"prefix":"10.1038","volume":"6","author":[{"given":"Paula","family":"V\u00e9lez","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raymundo","family":"Ocaranza-S\u00e1nchez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Diego","family":"L\u00f3pez-Otero","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lilian","family":"Grigorian-Shamagian","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isaac","family":"Rosa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Esteban","family":"Guiti\u00e1n","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 Mar\u00eda","family":"Garc\u00eda-Acu\u00f1a","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 Ram\u00f3n","family":"Gonz\u00e1lez-Juanatey","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"\u00c1ngel","family":"Garc\u00eda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2016,12,22]]},"reference":[{"key":"BFsrep39603_CR1","doi-asserted-by":"publisher","first-page":"2569","DOI":"10.1093\/eurheartj\/ehs289","volume":"33","author":"PG Steg","year":"2012","unstructured":"Steg, P. 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