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Cardioprotective effect of pioglitazone and curcumin against diabetic cardiomyopathy in type 1 diabetes mellitus: impact on CaMKII/NF-κB/TGF-β1 and PPAR-γ signaling pathway

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Abstract

Diabetic cardiomyopathy (DCM) is a leading cause of death in diabetic patients, which is currently without available specific treatment. This study aimed to investigate the potential protective effects of pioglitazone (Pio) and curcumin (Cur) against DCM in type 1 diabetes mellitus (T1DM), with pointing to their role on Ca+2/calmodulin-dependent protein kinase II (CaMKII) and peroxisome proliferator–activated receptor gamma (PPAR-γ) expression. Diabetes was induced in adult male Sprague Dawley rats by administration of single intraperitoneal injection of streptozotocin (STZ) (52.5 mg/kg). Diabetic rats were administered either Pio (20 mg/kg/day) or Cur (100 mg/kg/day) orally for 6 weeks. Treatment with Pio and/or Cur markedly reduced serum cardiac injury markers and lipid profile markers in diabetic animals. Additionally, Pio and/or Cur treatment mitigated oxidative stress and fibrosis in diabetic rats as evident from the significant suppression in myocardial lipid peroxidation and tumor growth factor beta 1 (TGF-β1) level, with concomitant significant elevation in total antioxidant capacity (TAC) and improvement in histopathological architecture of heart tissue. Pio/Cur treatment protocol accomplished its cardioprotective effect by depressing cardiac CaMKII/NF-κB signaling accompanied by enhancement in PPAR-γ expression. Conclusively, these findings demonstrated the therapeutic potential of Pio/Cur regimen in alleviating DCM in T1DM through modulation of CaMKII and PPAR-γ expression.

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Contributions

AG: Performed the experiments, collected the data, analyzed the data, and performed the graphical and statistical analysis; NA: Developed the research idea, designed the experiments, supervised the experiment execution, supervised the data analysis, and wrote and revised the manuscript; EM and HZ: Supervised the experiment execution, supervised the data analysis, and revised the manuscript. All authors read and approved the manuscript, and all data were generated in-house and that no paper mill was used.

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Correspondence to Nayira A. Abdel Baky.

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The authors declare that they have no conflicts of interest.

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Animal experiments were approved by Animal Ethics Committee of the Faculty of Pharmacy, Al-Azhar University, Egypt (approval number: 79/2016).

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Gbr, A.A., Abdel Baky, N.A., Mohamed, E.A. et al. Cardioprotective effect of pioglitazone and curcumin against diabetic cardiomyopathy in type 1 diabetes mellitus: impact on CaMKII/NF-κB/TGF-β1 and PPAR-γ signaling pathway. Naunyn-Schmiedeberg's Arch Pharmacol 394, 349–360 (2021). https://doi.org/10.1007/s00210-020-01979-y

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  • DOI: https://doi.org/10.1007/s00210-020-01979-y

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