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The aim of this study was to investigate whether punicalagin (PU) could prevent obesity-related cardiac dysfunction by promoting DNA demethylation, and to explore its possible mechanism. C57BL/6J mice were fed with standard diet, high-fat diet (HFD), HFD supplemented with resveratrol, low-dose PU (LPU) and high-dose PU (HPU) for 8 weeks. Compared with HFD group, body weight was signif icantly lower in PU treatment groups, number of cardiomyocytes and the protein level of myosin heavy chain 7B were signif icantly higher in PU treatment groups. Levels of 5-hydroxymethylcytosine and 5-formylcytosine were signif icantly lower in HFD group than in other groups. Compared with the HFD group, the protein level of ten-eleven translocation enzyme (TET) 2 was significantly higher in PU treatment groups, p-AMP-activated protein kinase (AMPK) was signif icantly higher in LPU group. Levels of total antioxidant capacity and the protein levels of complexes Ⅱ/Ⅲ/Ⅴ, oxoglutarate dehydrogenase, succinate dehydrogenase B and fumarate hydrolase were signif icantly lower in HFD group than PU treatment group. The ratio of (succinic acid + fumaric acid)/α-ketoglutarate was signif icantly higher in HFD group than other groups. In conclusion, PU up-regulated TETs enzyme activities and TET2 protein stability through alleviating mitochondrial dysfunction and activating AMPK, so as to promote DNA demethylation, thus preventing obesity-related cardiac dysfunction.


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Punicalagin prevents obesity-related cardiac dysfunction through promoting DNA demethylation in mice

Show Author's information Shengjie Peia,bRun Liua,bQingqing MacPeng JiangdXin Hea,bZhongshi Qia,bJiacheng Fanga,bXu YangeZirui Yaoa,bXiaoqian LiuaXianfeng Jinga,bLei Chena,b( )Duo Lia,b,( )
Institute of Nutrition & Health, Qingdao University, Qingdao 266071, China
School of Public Health, Qingdao University, Qingdao 266071, China
Central Laboratory, Guizhou Aerospace Hospital, Zunyi 563000, China
Health Centers of Licha Town, Qingdao 266071, China
College of Computer Science and Technology, Qingdao University, Qingdao 266071, China

Peer review under responsibility of Tsinghua University Press.

Abstract

The aim of this study was to investigate whether punicalagin (PU) could prevent obesity-related cardiac dysfunction by promoting DNA demethylation, and to explore its possible mechanism. C57BL/6J mice were fed with standard diet, high-fat diet (HFD), HFD supplemented with resveratrol, low-dose PU (LPU) and high-dose PU (HPU) for 8 weeks. Compared with HFD group, body weight was signif icantly lower in PU treatment groups, number of cardiomyocytes and the protein level of myosin heavy chain 7B were signif icantly higher in PU treatment groups. Levels of 5-hydroxymethylcytosine and 5-formylcytosine were signif icantly lower in HFD group than in other groups. Compared with the HFD group, the protein level of ten-eleven translocation enzyme (TET) 2 was significantly higher in PU treatment groups, p-AMP-activated protein kinase (AMPK) was signif icantly higher in LPU group. Levels of total antioxidant capacity and the protein levels of complexes Ⅱ/Ⅲ/Ⅴ, oxoglutarate dehydrogenase, succinate dehydrogenase B and fumarate hydrolase were signif icantly lower in HFD group than PU treatment group. The ratio of (succinic acid + fumaric acid)/α-ketoglutarate was signif icantly higher in HFD group than other groups. In conclusion, PU up-regulated TETs enzyme activities and TET2 protein stability through alleviating mitochondrial dysfunction and activating AMPK, so as to promote DNA demethylation, thus preventing obesity-related cardiac dysfunction.

Keywords: Mitochondrial function, DNA demethylation, Obesity-related cardiac dysfunction, Punicalagin, Ten-eleven translocation family enzymes

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Received: 27 September 2022
Revised: 25 October 2022
Accepted: 08 November 2022
Published: 08 February 2024
Issue date: May 2024

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© 2024 Beijing Academy of Food Sciences. Publishing services by Tsinghua University Press.

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This work was supported by the Natural Science Foundation of Shandong Province (ZR2020QH294 and ZR2021QH342).

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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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