Abstract:
BACKGROUND:Genome-wide association studies of patients with coronary artery disease (CAD) suggest that several risk loci increase the risk of CAD and myocardial infarction (MI) equally. In contrast, the ABO locus is stronger associated with MI than with CAD, but the underlying mechanisms are unknown. PURPOSE:To investigate the association between the ABO risk variant and platelet activation and aggregation. Moreover, to explore the effects of other CAD-associated risk variants. METHODS:We included 879 stable CAD patients receiving low-dose aspirin. All patients were genotyped for 45 genome-wide significant CAD risk variants, including rs495828 at the ABO locus. A genetic risk score (GRS) was calculated to assess the combined risk of all genetic variants. Serum soluble P-selectin (sP-selectin) and thromboxane B2 were used as measures of platelet activation, and platelet aggregation was assessed by multiple electrode aggregometry (MEA) using arachidonic acid and collagen as agonists and VerifyNow. RESULTS:The rs495828 CAD risk allele was associated with higher MEA platelet aggregation; arachidonic acid: 14.9% (6.7-23.7%, p = 0.0002) higher AUC (Area Under aggregation Curve) per risk allele, and collagen: 13.1% (5.8%-20.9%, p = 0.0003). Conversely, sP-selectin levels were 7.5% (3.1%-11.7%, p = 0.001) lower per risk allele. Rs495828 genotypes were not associated with aggregation assessed by VerifyNow (p = 0.30) or S-thromboxane B2 levels (p = 0.98). None of the remaining variants or the GRS were associated with platelet activation or aggregation. CONCLUSIONS:The ABO risk allele was associated with increased platelet aggregation as assessed by MEA. This finding may contribute to explain the increased MI risk in ABO risk variant carriers.
journal_name
Int J Cardioljournal_title
International journal of cardiologyauthors
Christiansen MK,Larsen SB,Nyegaard M,Neergaard-Petersen S,Würtz M,Grove EL,Hvas AM,Jensen HK,Kristensen SDdoi
10.1016/j.ijcard.2019.01.090subject
Has Abstractpub_date
2019-07-01 00:00:00pages
152-158eissn
0167-5273issn
1874-1754pii
S0167-5273(18)34865-4journal_volume
286pub_type
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