Asiatic Acid Attenuates Myocardial Ischemia-Reperfusion Injury via Akt-GSK-3β-HIF-1α Signaling in Rat H9c2 CardiomyocytesReportar como inadecuado


Asiatic Acid Attenuates Myocardial Ischemia-Reperfusion Injury via Akt-GSK-3β-HIF-1α Signaling in Rat H9c2 Cardiomyocytes


Asiatic Acid Attenuates Myocardial Ischemia-Reperfusion Injury via Akt-GSK-3β-HIF-1α Signaling in Rat H9c2 Cardiomyocytes - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1

Institute of Translational Medicine, Nanchang University, 1299 Xuefu Avenue, Nanchang 330031, China

2

Department of Pharmacy, The First Affiliated Hospital of Nanchang University, 17 Yongwai Street, Nanchang 330006, China

3

Department of Physiology, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China





*

Author to whom correspondence should be addressed.



Academic Editor: Nancy D. Turner

Abstract Myocardial ischemic-reperfusion injury results from severe impairment of coronary blood supply and leads to irreversible cell death, with limited therapeutic possibilities. Asiatic acid is a pentacyclic triterpenoid derived from the tropical medicinal plant Centella asiatica and serves a variety of bioactivities. In this study, we determined the effect of asiatic acid on myocardial ischemia-reperfusion injury and investigated the underlying mechanisms, using an in vitro rat H9c2 cardiomyocytes model of oxygen-glucose deprivation-reoxygenation OGD-R injury. Results showed that pre-treatment with asiatic acid significantly augmented cell viability and prevented lactate dehydrogenase LDH release in a concentration-dependent manner after OGD-R exposure. Asiatic acid at 10 μM effectively inhibited apoptotic cell death, suppressed the activities of caspase-3 and caspase-9, and reversed Bax-Bcl-2 ratio in hypoxic H9c2 cells. In addition, asiatic acid improved mitochondrial function, as evidenced by reduced reactive oxygen species ROS accumulation, enhanced mitochondrial membrane potential and decreased intracellular calcium concentration. Using Western blot assay, we found that asiatic acid promoted the phosphorylation of Akt and subsequent inactivation of glycogen synthase kinase-3β GSK-3β, and induced the expression of hypoxia-inducible factor 1α HIF-1α after OGD-R. The cardioprotective effects of asiatic acid were attenuated by the Akt or HIF-1α inhibitor. Taken together, these data suggested that asiatic acid exerted protective effects against OGD-R-induced apoptosis in cardiomyocytes, at least partly via the Akt-GSK-3β-HIF-1α pathway. View Full-Text

Keywords: asiatic acid; myocardial ischemia; OGD-R; Akt; HIF-1α asiatic acid; myocardial ischemia; OGD-R; Akt; HIF-1α





Autor: Xiang Huang 1,†, Li Zuo 1,†, Yanni Lv 2, Chuqiao Chen 1, Yaqin Yang 1, Hongbo Xin 1, Yunman Li 3 and Yisong Qian 1,*

Fuente: http://mdpi.com/



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