Activation of Nrf2 by Lithospermic Acid Ameliorates Myocardial Ischemia and Reperfusion Injury by Promoting Phosphorylation of AMP-Activated Protein Kinase α (AMPKα)

Background: As a plant-derived polycyclic phenolic carboxylic acid isolated from Salvia miltiorrhiza, lithospermic acid (LA) has been identified as the pharmacological management for neuroprotection and hepatoprotection. However, the role and mechanism of lithospermic acid in the pathological proces...

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Autores principales:	Min Zhang, Li Wei, Saiyang Xie, Yun Xing, Wenke Shi, Xiaofeng Zeng, Si Chen, Shasha Wang, Wei Deng, Qizhu Tang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	lithospermic acid myocardial ischemia-reperfusion injury (MIRI) Nrf2 oxidative stress ampkα Therapeutics. Pharmacology RM1-950
Acceso en línea:	https://doaj.org/article/98fe9b35e9cd43eb9ebf58f6fd0ba930
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spelling	oai:doaj.org-article:98fe9b35e9cd43eb9ebf58f6fd0ba9302021-12-01T07:14:07ZActivation of Nrf2 by Lithospermic Acid Ameliorates Myocardial Ischemia and Reperfusion Injury by Promoting Phosphorylation of AMP-Activated Protein Kinase α (AMPKα)1663-981210.3389/fphar.2021.794982https://doaj.org/article/98fe9b35e9cd43eb9ebf58f6fd0ba9302021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fphar.2021.794982/fullhttps://doaj.org/toc/1663-9812Background: As a plant-derived polycyclic phenolic carboxylic acid isolated from Salvia miltiorrhiza, lithospermic acid (LA) has been identified as the pharmacological management for neuroprotection and hepatoprotection. However, the role and mechanism of lithospermic acid in the pathological process of myocardial ischemia-reperfusion injury are not fully revealed.Methods: C57BL/6 mice were subjected to myocardial ischemia and reperfusion (MI/R) surgery and pretreated by LA (50 mg/kg, oral gavage) for six consecutive days before operation. The in vitro model of hypoxia reoxygenation (HR) was induced by hypoxia for 24 h and reoxygenation for 6 h in H9C2 cells, which were subsequently administrated with lithospermic acid (100 μM). Nrf2 siRNA and dorsomorphin (DM), an inhibitor of AMPKα, were used to explore the function of AMPKα/Nrf2 in LA-mediated effects.Results: LA pretreatment attenuates infarct area and decreases levels of TnT and CK-MB in plasm following MI/R surgery in mice. Echocardiography and hemodynamics indicate that LA suppresses MI/R-induced cardiac dysfunction. Moreover, LA ameliorates oxidative stress and cardiomyocytes apoptosis following MI/R operation or HR in vivo and in vitro. In terms of mechanism, LA selectively activates eNOS, simultaneously increases nuclear translocation and phosphorylation of Nrf2 and promotes Nrf2/HO-1 pathway in vivo and in vitro, while cardioprotection of LA is abolished by pharmacological inhibitor of AMPK or Nrf2 siRNA in H9C2 cells.Conclusion: LA protects against MI/R-induced cardiac injury by promoting eNOS and Nrf2/HO-1 signaling via phosphorylation of AMPKα.Min ZhangMin ZhangLi WeiSaiyang XieSaiyang XieYun XingYun XingWenke ShiWenke ShiXiaofeng ZengXiaofeng ZengSi ChenSi ChenShasha WangShasha WangWei DengWei DengQizhu TangQizhu TangFrontiers Media S.A.articlelithospermic acidmyocardial ischemia-reperfusion injury (MIRI)Nrf2oxidative stressampkαTherapeutics. PharmacologyRM1-950ENFrontiers in Pharmacology, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	lithospermic acid myocardial ischemia-reperfusion injury (MIRI) Nrf2 oxidative stress ampkα Therapeutics. Pharmacology RM1-950
spellingShingle	lithospermic acid myocardial ischemia-reperfusion injury (MIRI) Nrf2 oxidative stress ampkα Therapeutics. Pharmacology RM1-950 Min Zhang Min Zhang Li Wei Saiyang Xie Saiyang Xie Yun Xing Yun Xing Wenke Shi Wenke Shi Xiaofeng Zeng Xiaofeng Zeng Si Chen Si Chen Shasha Wang Shasha Wang Wei Deng Wei Deng Qizhu Tang Qizhu Tang Activation of Nrf2 by Lithospermic Acid Ameliorates Myocardial Ischemia and Reperfusion Injury by Promoting Phosphorylation of AMP-Activated Protein Kinase α (AMPKα)
description	Background: As a plant-derived polycyclic phenolic carboxylic acid isolated from Salvia miltiorrhiza, lithospermic acid (LA) has been identified as the pharmacological management for neuroprotection and hepatoprotection. However, the role and mechanism of lithospermic acid in the pathological process of myocardial ischemia-reperfusion injury are not fully revealed.Methods: C57BL/6 mice were subjected to myocardial ischemia and reperfusion (MI/R) surgery and pretreated by LA (50 mg/kg, oral gavage) for six consecutive days before operation. The in vitro model of hypoxia reoxygenation (HR) was induced by hypoxia for 24 h and reoxygenation for 6 h in H9C2 cells, which were subsequently administrated with lithospermic acid (100 μM). Nrf2 siRNA and dorsomorphin (DM), an inhibitor of AMPKα, were used to explore the function of AMPKα/Nrf2 in LA-mediated effects.Results: LA pretreatment attenuates infarct area and decreases levels of TnT and CK-MB in plasm following MI/R surgery in mice. Echocardiography and hemodynamics indicate that LA suppresses MI/R-induced cardiac dysfunction. Moreover, LA ameliorates oxidative stress and cardiomyocytes apoptosis following MI/R operation or HR in vivo and in vitro. In terms of mechanism, LA selectively activates eNOS, simultaneously increases nuclear translocation and phosphorylation of Nrf2 and promotes Nrf2/HO-1 pathway in vivo and in vitro, while cardioprotection of LA is abolished by pharmacological inhibitor of AMPK or Nrf2 siRNA in H9C2 cells.Conclusion: LA protects against MI/R-induced cardiac injury by promoting eNOS and Nrf2/HO-1 signaling via phosphorylation of AMPKα.
format	article
author	Min Zhang Min Zhang Li Wei Saiyang Xie Saiyang Xie Yun Xing Yun Xing Wenke Shi Wenke Shi Xiaofeng Zeng Xiaofeng Zeng Si Chen Si Chen Shasha Wang Shasha Wang Wei Deng Wei Deng Qizhu Tang Qizhu Tang
author_facet	Min Zhang Min Zhang Li Wei Saiyang Xie Saiyang Xie Yun Xing Yun Xing Wenke Shi Wenke Shi Xiaofeng Zeng Xiaofeng Zeng Si Chen Si Chen Shasha Wang Shasha Wang Wei Deng Wei Deng Qizhu Tang Qizhu Tang
author_sort	Min Zhang
title	Activation of Nrf2 by Lithospermic Acid Ameliorates Myocardial Ischemia and Reperfusion Injury by Promoting Phosphorylation of AMP-Activated Protein Kinase α (AMPKα)
title_short	Activation of Nrf2 by Lithospermic Acid Ameliorates Myocardial Ischemia and Reperfusion Injury by Promoting Phosphorylation of AMP-Activated Protein Kinase α (AMPKα)
title_full	Activation of Nrf2 by Lithospermic Acid Ameliorates Myocardial Ischemia and Reperfusion Injury by Promoting Phosphorylation of AMP-Activated Protein Kinase α (AMPKα)
title_fullStr	Activation of Nrf2 by Lithospermic Acid Ameliorates Myocardial Ischemia and Reperfusion Injury by Promoting Phosphorylation of AMP-Activated Protein Kinase α (AMPKα)
title_full_unstemmed	Activation of Nrf2 by Lithospermic Acid Ameliorates Myocardial Ischemia and Reperfusion Injury by Promoting Phosphorylation of AMP-Activated Protein Kinase α (AMPKα)
title_sort	activation of nrf2 by lithospermic acid ameliorates myocardial ischemia and reperfusion injury by promoting phosphorylation of amp-activated protein kinase α (ampkα)
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/98fe9b35e9cd43eb9ebf58f6fd0ba930
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Activation of Nrf2 by Lithospermic Acid Ameliorates Myocardial Ischemia and Reperfusion Injury by Promoting Phosphorylation of AMP-Activated Protein Kinase α (AMPKα)

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