Open Access

Difluoromethylornithine attenuates isoproterenol‑induced cardiac hypertrophy by regulating apoptosis, autophagy and the mitochondria‑associated membranes pathway

  • Authors:
    • Yu Zhao
    • Wei-Wei Jia
    • San Ren
    • Wei Xiao
    • Guang-Wei Li
    • Li Jin
    • Yan Lin
  • View Affiliations

  • Published online on: June 13, 2021     https://doi.org/10.3892/etm.2021.10302
  • Article Number: 870
  • Copyright: © Zhao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Myocardial hypertrophy is an independent risk factor of cardiovascular diseases and is closely associated with the incidence of heart failure. In the present study, we hypothesized that difluoromethylornithine (DFMO) could attenuate cardiac hypertrophy through mitochondria‑associated membranes (MAM) and autophagy. Cardiac hypertrophy was induced in male rats by intravenous administration of isoproterenol (ISO; 5 mg/kg/day) for 1, 3,7 and 14 days. For DFMO treatment group, rats were given ISO (5 mg/kg/day) for 14 days and 2% DFMO in their water for 4 weeks. The expression of atrial natriuretic peptide (ANP) mRNA,heart parameters, apoptosis rate, fibrotic area and protein expressions of cleaved caspase3/9, GRP75, Mfn2, CypD and VDAC1 were measured to confirm the development of cardiac hypertrophy, apoptosis and autophagy induced by ISO. ANP mRNA and MAM protein expression levels were assessed by reverse transcription‑quantitative PCR and western blotting to evaluate hypertrophy and the effects of DFMO oral administration. The results demonstrated that heart parameters, ANP mRNA levels, fibrotic area and apoptosis rate were significantly increased in the heart tissue for ISO 7 and 14 day groups compared with the control group. Furthermore, treatment with DFMO significantly inhibited these indicators, and DFMO downregulated the MAM signaling pathway and upregulated the autophagy pathway in heart tissue compared with the ISO 14 day group. Overall, all ISO‑induced changes analyzed in the present study were attenuated following treatment with DFMO. The findings form this study suggested that DFMO treatment may be considered as a potential strategy for preventing ISO‑induced cardiac hypertrophy.
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August-2021
Volume 22 Issue 2

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Zhao Y, Jia W, Ren S, Xiao W, Li G, Jin L and Lin Y: Difluoromethylornithine attenuates isoproterenol‑induced cardiac hypertrophy by regulating apoptosis, autophagy and the mitochondria‑associated membranes pathway. Exp Ther Med 22: 870, 2021
APA
Zhao, Y., Jia, W., Ren, S., Xiao, W., Li, G., Jin, L., & Lin, Y. (2021). Difluoromethylornithine attenuates isoproterenol‑induced cardiac hypertrophy by regulating apoptosis, autophagy and the mitochondria‑associated membranes pathway. Experimental and Therapeutic Medicine, 22, 870. https://doi.org/10.3892/etm.2021.10302
MLA
Zhao, Y., Jia, W., Ren, S., Xiao, W., Li, G., Jin, L., Lin, Y."Difluoromethylornithine attenuates isoproterenol‑induced cardiac hypertrophy by regulating apoptosis, autophagy and the mitochondria‑associated membranes pathway". Experimental and Therapeutic Medicine 22.2 (2021): 870.
Chicago
Zhao, Y., Jia, W., Ren, S., Xiao, W., Li, G., Jin, L., Lin, Y."Difluoromethylornithine attenuates isoproterenol‑induced cardiac hypertrophy by regulating apoptosis, autophagy and the mitochondria‑associated membranes pathway". Experimental and Therapeutic Medicine 22, no. 2 (2021): 870. https://doi.org/10.3892/etm.2021.10302