TY - JOUR AB - Allisartan isoproxil is a new nonpeptide angiotensin II receptor blocker (ARB) precursor drug that is used to treat hypertension and reduce the risk of heart disease. The present study explored the effects of allisartan isoproxil on diabetic cardiomyopathy (DCM) and revealed the roles of hyperglycaemia‑induced oxidative stress and inflammation. A rat DCM model was established by high‑fat diet feeding in combination with intraperitoneal injection of streptozocin. Echocardiographs showed that diabetic rats exhibited significantly decreased cardiac function. Troponin T (cTnT) and B‑type natriuretic peptide (BNP) were significantly increased in DCM rats as obtained by ELISA. Allisartan isoproxil significantly improved the EF% and E'/A' ratio. Histopathologic staining showed that allisartan isoproxil prevented histological alterations, attenuated the accumulation of collagen, and ameliorated cTnT and BNP levels. Western blot and immunohistochemical results indicated that the expression levels of silent information regulator 2 homologue 1 (SIRT1) and nuclear factor erythroid 2‑related factor 2 (Nrf2) were decreased in the hearts of diabetic rats, and antioxidant defences were also decreased. In addition, allisartan isoproxil decreased the expression of NF‑κB p65 and the inflammatory cytokines TNF‑α and IL‑1β which were determined by reverse transcription‑quantitative PCR in the diabetic heart. Western blotting and TUNEL staining results also showed that cardiac Bax and cleaved caspase‑3 and the number of apoptotic myocardial cells were increased in the diabetic heart and decreased following treatment with allisartan isoproxil. In conclusion, the present results indicated that allisartan isoproxil alleviated DCM by attenuating diabetes‑induced oxidative stress and inflammation through the SIRT1/Nrf2/NF‑κB signalling pathway. AD - Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China Department of Nephrology, Hangzhou Hospital of Traditional Chinese Medicine, Hangzhou, Zhejiang 310007, P.R. China AU - Jin,Qinyang AU - Zhu,Qin AU - Wang,Kai AU - Chen,Mengli AU - Li,Xinli DA - 2021/03/01 DO - 10.3892/mmr.2021.11854 IS - 3 JO - Mol Med Rep KW - diabetic cardiomyopathy allisartan isoproxil inflammation oxidative stress silent information regulator 2 homologue 1 nuclear factor erythroid 2‑related factor 2 NF‑κB PY - 2021 SN - 1791-2997 1791-3004 SP - 215 ST - Allisartan isoproxil attenuates oxidative stress and inflammation through the SIRT1/Nrf2/NF‑κB signalling pathway in diabetic cardiomyopathy rats T2 - Molecular Medicine Reports TI - Allisartan isoproxil attenuates oxidative stress and inflammation through the SIRT1/Nrf2/NF‑κB signalling pathway in diabetic cardiomyopathy rats UR - https://doi.org/10.3892/mmr.2021.11854 VL - 23 ER -