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Apelin ameliorated acute heart failure via inhibiting endoplasmic reticulum stress in rabbits

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Abstract

This study aimed to investigate whether inhibition of endoplasmic reticulum stress (ERS) mediated the ameliorative effect of apelin on acute heart failure (AHF). Rabbit model of AHF was induced by sodium pentobarbital. Cardiac dysfunction and injury were detected in the rabbit models of AHF, including impaired hemodynamic parameters and increased levels of CK-MB and cTnI. Apelin treatment dramatically improved cardiac impairment caused by AHF. ERS, indexed by increased GRP78, CHOP, and cleaved-caspase12 protein levels, was simultaneously attenuated by apelin. Apelin also could ameliorate increased protein levels of cleaved-caspase3 and Bax, and improved decreased protein levels of Bcl-2. Two common ERS stimulators, tunicamycin (Tm) and dithiothreitol (DTT) blocked the ameliorative effect of apelin on AHF. Phosphorylated Akt levels increased after apelin treatment in the rabbit models of AHF. The Akt signaling inhibitors wortmannin and LY294002 could block the cardioprotective effect of apelin, which could be relieved by ERS inhibitor 4-phenyl butyric acid (4-PBA). The aforementioned beneficial effects of apelin could all be blocked by APJ receptor antagonist F13A. 4-PBA and SC79, an Akt activator, can restore the ameliorative effect of apelin on AHF blocked by F13A. Apelin treatment dramatically ameliorated cardiac impairment caused by AHF, which might be mediated by APJ/Akt/ERS signaling pathway. These results will shed new light on AHF therapy.

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Funding

This work was supported by the National Natural Science Foundation of China (No. 81100229, 81770499), and the Province Natural Science Foundation of Hebei (No. H2016206264, H2020206350).

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YL: conceptualization, data curation, formal analysis, investigation, methodology, writing—original draft; HL: conceptualization, data curation, formal analysis, investigation, methodology, writing—original draft; WX: data curation, investigation, methodology; YS: data curation, investigation, methodology; CZ: data curation, investigation, methodology; YW: data curation, investigation, methodology; RY: data curation, formal analysis, project administration; SJ: data curation, formal analysis, project administration; YW: resources, supervision, validation; XW: conceptualization, data curation, formal analysis, supervision, validation, writing—review and editing; XT: conceptualization, data curation, formal analysis, funding acquisition, supervision, validation, writing—review and editing.

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Correspondence to Xiaoning Wang or Xu Teng.

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All animal procedures complied with the Animal Management Rule of the Ministry of Health, People’s Republic of China (document No. 55, 2001), and the US National Institutes of Health guide for the care and use of laboratory animals (NIH Publications No. 8023, revised 1978) and were approved by the Animal Care Committee of Hebei Medical University.

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Handling Editor: E. Closs.

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Li, Y., Lu, H., Xu, W. et al. Apelin ameliorated acute heart failure via inhibiting endoplasmic reticulum stress in rabbits. Amino Acids 53, 417–427 (2021). https://doi.org/10.1007/s00726-021-02955-3

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  • DOI: https://doi.org/10.1007/s00726-021-02955-3

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