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Effect of diminazene on cardiac hypertrophy through mitophagy in rat models with hyperthyroidism induced by levothyroxine

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Abstract

Hyperthyroidism is associated with the alteration in molecular pathways involved in the regulation of mitochondrial mass and apoptosis, which contribute to the development of cardiac hypertrophy. Diminazene (DIZE) is an animal anti-infection drug that has shown promising effects on improving cardiovascular disease. The aim of the present study was to investigate the therapeutic effect of DIZE on cardiac hypertrophy and the signaling pathways involved in this process in the hyperthyroid rat model. Twenty male Wistar rats were equally divided into four groups: control, hyperthyroid, DIZE, and hyperthyroid + DIZE. After 28 days of treatment, serum thyroxine (T4) and thyroid stimulating hormone (TSH) level, cardiac hypertrophy indices, cardiac damage markers, cardiac malondialdehyde (MDA), and superoxide dismutase (SOD) level, the mRNA expression level of mitochondrial and apoptotic genes were evaluated. Hyperthyroidism significantly decreased the cardiac expression level of SIRT1/PGC1α and its downstream involved in the regulation of mitochondrial biogenesis, mitophagy, and antioxidant enzyme activities including TFAM, PINK1/MFN2, Drp1, and Nrf2, respectively, as well as stimulated mitochondrial-dependent apoptosis by reducing Bcl-2 expression and increasing Bax expression. Treatment with DIZE significantly reversed the downregulation of SIRT1, PGC1α, PINK1, MFN2, Drp1, and Nrf2 but did not significantly change the TFAM expression. Moreover, DIZE suppressed apoptosis by normalizing the cardiac expression levels of Bax and Bcl-2. DIZE is effective in attenuating hyperthyroidism-induced cardiac hypertrophy by modulating the mitophagy-related pathway, suppressing apoptosis and oxidative stress.

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Data availability

The data used and analyzed in this study are available from the corresponding author on reasonable request.

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Funding

The study was funded by the vice-chancellor for research and technology, Hamadan University of Medical Sciences (no. 140110138754). The authors would like to thank Hamadan University of Medical Sciences for funding.

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FSH and FRA conceived the project. FSH, FRA, MZ, and SR participated in data extraction and analysis, prepared figures, and wrote the manuscript. FRA and AK revised the manuscript. All the authors read and approved the final manuscript. The authors declare that all data were generated in-house and that no paper mill was used.

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Correspondence to Fatemeh Ramezani-Aliakbari.

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Ethical approval was granted by the Ethics Committee of Hamadan University of Medical Sciences (ethics committee permission no. IR.UMSHA.REC.1401.772).

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The authors declare no competing interests.

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Shokri, F., Zarei, M., Komaki, A. et al. Effect of diminazene on cardiac hypertrophy through mitophagy in rat models with hyperthyroidism induced by levothyroxine. Naunyn-Schmiedeberg's Arch Pharmacol 397, 1151–1162 (2024). https://doi.org/10.1007/s00210-023-02680-6

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  • DOI: https://doi.org/10.1007/s00210-023-02680-6

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