Advanced glycation end products in isoproterenol-induced acute myocardial infarction

BACKGROUND: Isoproterenol is a synthetic catecholamine that can produce diffuse myocardial necrosis at high doses. Advanced glycation end products (AGEs) are involved in the development and progression of cardiovascular disease, including acute coronary syndrome. The purpose of the study was to determine the changes of serum and tissue AGE content in isoproterenol-induced acute myocardial infarction and to assess their informational character in the early diagnosis, risk stratification and prognosis of disease. METHODS: Forty adult male rats were divided into 5 groups: sham (L1=11), control 0.9% NaCl (L2=11), and with experimental myocardial infarction (L3=6, L4=6; L5=6), induced by the subcutaneous injection of Isoproterenol Hydrochloride solution 100 mg/kg, and sacrificed over 6 hours, 24 hours and 7 days post infarction. The results were presented by median and interquartile range. The groups were compared using Kruskal-Wallis and Mann-Whitney nonparametric tests, and the Spearman correlation coefficient was calculated (SPSS 23.0). RESULTS: A decrease of AGE serum levels in L3 were identified, followed by a significant increase in L4, the trend maintained in L5, which significantly exceeded the values in sham and control groups. In the homogenate, AGEs presented an elevation in L3, with a relevant decrease in L4, and an inconsistent increase in L5 compared to sham and control groups. CONCLUSION: The collected data suggest the utility of AGE assessment in early diagnosis and risk stratification in acute myocardial infarction.