Oxidative stress and ASA resistance in patients withcoronary arthery disease

Overview

Almost one third of population is affected by thrombocytopathy with platelet hyperaggregability. A lotof these individuals have coronary artery disease (CAD) and are treated with low doses of ASA(acetylsalicylic acid). Recent papers often report on ASA resistance (ASA-R). In general, ASA resistanceoccurs in 5–15% of population. Several communications reported the data on 70–80% of ASA resistancein persons with progressed ICH. Many factors account for it: smoking, NSA abuse, polymorphisms COXand IIb–IIIa, DM, dyslipidemia, stress, etc. A direct correlation between oxidative stress and theincidence of ASA-R (elevated synthesis of isopropanes with aggregation effect) is assumed. The aim ofthe present communication was to study a correlation between ASA resistance and oxidative stress inCAD patients. Methods: The study was performed with 298 individuals treated with 100 mg of ASA/dayunder the secondary prevention programme. The spontaneous platelet aggregability was examined aswell as aggregability after induction CPG (cut-off for ASA-R spontaneous aggregability – 5%, CPG slope– 53%/min), AOPP and ultrasensitive CRP were determined. Results: 298 individuals (65% men, 35%women, mean age 64.8±9.8 years), secondary CAD prevention. ASA resistance was found in 43%, AOPPvalues was significantly increased in 13% (>100 µmol/l). No correlation was found between aggregationmarkers and AOPP/CRP concentration (even after stratification according to ASA-R). The incidence ofASA resistance correlated only with age (correlation coefficient 0.19, p < 0.0001). AOPP and CRP valueswere higher in men compared with women (94.2 µmol/l vs. 77.7 µmol/l, p < 0.05; 12.9 mg/l vs. 6.6 mg/l, p

Key words:
ASA resistance, oxidative stress, advanced oxidation protein products (AOPP)