This study aimed to evaluate the protective potential of taurine (Tau) and enzymatically modified isoquercitrin (EMIQ), both individually and in combination, against MTX-induced cardiotoxicity in male rats. A total of 36 rats were randomly divided into six groups (six animals each): control (vehicle), MTX alone (20 mg/kg, single dose), EMIQ+MTX (EMIQ at 26 mg/kg, p.o. for 16 days, with a single dose of MTX on the 13th day), Tau + MTX (Tau at 500 mg/kg, p.o. for 16 days, with a single dose of MTX on the 13th day), (EMIQ+Tau)+MTX, and (EMIQ+Tau)½+MTX. MTX treatment resulted in elevated levels of cardiac creatine phosphokinase-myocardial band, troponin I, nitric oxide, malondialdehyde, and serum IL-6, while decreasing levels of cardiac myeloperoxidase, catalase, and superoxide dismutase. MTX also reduced expression of , induced DNA laddering and fragmentation, and increased cleaved caspase-3 protein expression in cardiac tissue. Both Tau and EMIQ showed equivalent effectiveness in protecting the heart against MTX-induced damage due to their antioxidant, anti-inflammatory, and antiapoptotic properties. Notably, combined treatment with half-doses of Tau and EMIQ offered superior protection compared to full doses of each agent alone. The full-dose combination showed similar efficacy to the half-dose combination, with a few exceptions. Overall, these results suggest a synergistic effect of Tau and EMIQ in mitigating MTX-induced cardiotoxicity, warranting further investigation into the underlying mechanisms.

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http://dx.doi.org/10.1080/01480545.2024.2424282DOI Listing

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