Abstract
BackgroundDiabetic patients commonly present an increased risk for cardiovascular events, for which aspirin is the most frequently used medication for primary prevention. Urinary 11-dehydro thromboxane (11-dhTXB2) concentrations assess the effect of aspirin on platelets and identify patients who are at risk of cardiovascular events. The present study investigated whether or not type 2 diabetic patients who took a daily dose of 100mg of aspirin had a significant reduction in urinary 11-dhTXB2 concentrations and whether these results were associated with clinical and laboratory variables. MethodsEighty-one type 2 diabetic patients were enrolled in the study. Laboratory tests included the determination of lipidic profile, glycated hemoglobin, platelets count, molecular analysis for both GPIIbIIIa and COX-1 polymorphisms, and urinary 11-dhTXB2. ResultsPatients' median value for urinary 11-dhTXB2 before aspirin intake was 179pg/mg of creatinine. After 15days taking aspirin, the patients presented median of 51pg/mg of creatinine, thus revealing a significant difference between medians (p=0.00). A reduction of 95% in urinary 11-dhTXB2 concentrations could only be identified in 4 patients (5%). A BMI of ≥26 presented a significant association with a reduction of urinary 11-dhTXB2 concentrations (p=0.010), as shown by the multiple logistic regression model. Other clinical and laboratory variables showed no association. ConclusionsRegardless of the mechanisms related to aspirin non-responsiveness, most patients enrolled in the present study also presented a reduced or minimal response to low-dose aspirin therapy, thereby indicating a clear variability related to aspirin effectiveness. Moreover, BMI appears to be independently associated to the reduction of urinary 11-dhTXB2 concentrations in type 2 diabetic patients taking aspirin.
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