Astragaloside IV exerts angiogenesis and cardioprotection after myocardial infarction via regulating PTEN/PI3K/Akt signaling pathway.

Affiliation

Jiangsu Province Hospital of Traditional Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China. Electronic address: [Email]

Abstract

OBJECTIVE : Acute myocardial infarction (AMI) is a common cardiovascular disease with high mortality. Astragaloside IV (AS-IV) was reported to have cardioprotective effect after AMI. We hypothesize that the cardioprotective role of AS-IV is exerted by enhancing angiogenesis via regulating PTEN/PI3K/Akt signaling pathway. To valid our hypothesis, AMI rats and human umbilical vein endothelial cells (HUVECs) were employed in our study.
RESULTS : After treatment, cardiac function, survival rate, infarct size, pathological changes and fibrosis, cell apoptosis, ultrastructural changes, angiogenesis and expression of PTEN/PI3K/Akt signaling pathway were evaluated, respectively. In vitro study we detected proliferation, tube formation and signaling pathway activation of HUVECs treated with AS-IV, lentivirus overexpressed PTEN was employed to elucidate the potential mechanism. The results indicated that AS-IV administration significantly improved cardiac function and survival rate, limited infarct size, ameliorated pathological changes and fibrosis deposition, inhibited apoptosis, relieved ultrastructure injury and enhanced angiogenesis, PTEN/PI3K/Akt signaling pathway was activated simultaneously compared to the model group. In vitro study suggested that AS-IV treatment promoted cell proliferation and tube formation, and induced PTEN/PI3K/Akt signaling pathway activation. Importantly, overexpression of PTEN by lentivirus abolished AS-IV-induced angiogenesis.
CONCLUSIONS : Our study indicated that AS-IV could promote angiogenesis and cardioprotection after myocardial infarction. The mechanisms involve activation of PTEN/PI3K/Akt signaling pathway.

Keywords

Acute myocardial infarction,Angiogenesis,Astragaloside IV,PTEN/PI3K/Akt signaling pathway,

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