RESUMO
AIMS: This study aimed to evaluate the effect of Chlorpyrifos (CPF) in rat heart tissue and the effect of Curcumin (Cur) on cardiac enzymes, oxidative indices, and histopathological changes in the cardiac tissue. BACKGROUND: CPF, the most used organophosphorus pesticide (OP), has been reported to induce cardiotoxic effects. OBJECTIVE: The cardioprotective effects of Cur against CPF-induced toxicity have not been entirely investigated till now. METHOD: Forty male Wistar rats were randomized into five groups (n=8). C group (Control animals that received olive oil), CPF group (10 mg/kg/day), CPF + Cur 25, CPF + Cur 50, and CPF + Cur 100 groups (animals received 10 mg/kg/day CPF and 25, 50, and 100 mg/kg Cur, respectively). All treatments were administered via oral gavage for 90 days. Cardiac enzymes (LDH & CPK) and oxidative stress (OS) biomarkers in heart tissue (malondialdehyde, Superoxide Dismutase) were measured. Histopathological changes in the heart tissue were also evaluated. RESULT: Chronic exposure to CPF significantly increased cardiac enzyme levels and OS biomarkers. Histological changes were found, including disorganization of the cardiac muscle fibers with disorganization and degeneration in myocardial fibers with separation of myofibrils and cytoplasmic vacuolization of cardiac muscle fibers. Administration of Cur (100 mg/kg) reversed serum LDH concentration and OS biomarkers to normal levels in CPF-exposed animals (p < 0.05) and significantly improved cardiac damage. CONCLUSION: According to the results of this study, Cur can reduce the adverse effects of long-term exposure to CPF in rat heart tissue by modulating OS.
