title: Effect of common single-nucleotide polymorphisms in acetylsalicylic acid metabolic pathway genes on platelet reactivity in patients with diabetes.
abstract: BACKGROUND
  Platelet reactivity in patients on acetylsalicylic acid (ASA) therapy can be influenced by physiological or pathological conditions affecting ASA pharmacokinetics or pharmacodynamics. The mechanism of such variability in the therapeutic response to ASA, particularly in diabetic patients, is poorly understood. The rate of elimination of ASA and its metabolite, salicylic acid (SA), is likely a major factor determining drug efficacy. The objective of this study was to investigate the effect of genetic polymorphisms in the selected candidate genes within the ASA metabolic pathway on the platelet reactivity and concentration of ASA and thromboxane A(2) (TxA(2)) metabolites in a population of patients with type 2 diabetes mellitus (T2DM).
  
  
  METHODS
  The study cohort consisted of 287 Caucasians with T2DM who had been taking ASA tablets at the dose of 75 mg per day for at least 3 months. Platelet reactivity analyses were performed using VerifyNow Aspirin and PFA-100 assays. The measured ASA metabolite included salicylic acid (ASA), and TxA(2) metabolites included serum TxB(2) and urinary 11-dh-TxB(2). Genotyping for the selected 18 single-nucleotide polymorphisms (SNPs) within 5 genes of the ASA metabolic pathway was performed using a Sequenom iPLEX platform.
  
  
  RESULTS
  No statistically significant association was observed between the investigated SNPs genotypes, platelet reactivity, and measured metabolites in the investigated cohort of patients.
  
  
  CONCLUSIONS
  The results of our study failed to confirm that the selected variants in the genes within the ASA metabolic pathway might contribute to platelet reactivity in a diabetic population treated with ASA.
authors.affiliation: Department of Cardiology, Medical University of Warsaw, Warsaw, Poland.
authors.forename: Marek
authors.initials: M
authors.lastname: Postula
authors.forename: Piotr K
authors.initials: PK
authors.lastname: Janicki
authors.forename: Marek
authors.initials: M
authors.lastname: Rosiak
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Kaplon-Cieslicka
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Kondracka
authors.forename: Ewa
authors.initials: E
authors.lastname: Trzepla
authors.forename: Krzysztof J
authors.initials: KJ
authors.lastname: Filipiak
authors.forename: Dariusz A
authors.initials: DA
authors.lastname: Kosior
authors.forename: Andrzej
authors.initials: A
authors.lastname: Czlonkowski
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Opolski
mesh_terms: D000368:Aged; D001241:Aspirin / Q000378:metabolism*; D001792:Blood Platelets / Q000378:metabolism*; D003710:Demography; D003924:Diabetes Mellitus, Type 2 / Q000235:genetics* / Q000378:metabolism*; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D005838:Genotype; D006801:Humans; D008297:Male; D053858:Metabolic Networks and Pathways / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*
chemical_list: D001241:Aspirin