Protective effect of sonic hedgehog signaling pathway activation on acute myocardial infarction

SJ. Li, QH. Mei, SY. Zeng, LL. Lai, J. Quan, X. Zhang

Article ID: 4685
Vol 34, Issue 2, 2020
DOI: https://doi.org/10.23812/19-451-A-64
Received: 9 May 2020; Accepted: 9 May 2020; Available online: 9 May 2020; Issue release: 9 May 2020

Abstract

To study changes in the sonic hedgehog (Shh) signaling pathway in acute myocardial infarction (AMI) and the protective effect of changes in Shh signaling pathway activity on AMI, specific pathogen-free (SPF) C57BL/6 mice were treated with left anterior descending (LAD) ligation to establish an AMI model. The samples were collected on the 1st, 3rd, 14th, and 21st days after AMI induction. After the operations, the mice were administered the Shh signaling pathway receptor agonist SAG1.3 (5 mg/kg/d) and antagonist SANT-1 (3.3 mg/kg/d) by intraperitoneal injection. The myocardial ischemia model was established by oxygen glucose deprivation (OGD) in vitro. The AMI mouse model and the in vitro OGD-induced myocardial ischemia model were established. The Smo agonist SAG1.3 was used to activate the Shh signaling pathway, thereby reducing the expression of Bcl-2 and Bax. The number of apoptotic cells was reduced. Administration of the antagonist SANT-1 inhibited Shh signaling pathway activity by increasing the expression of Bcl-2 and Bax, and the number of apoptotic cells increased. In conclusion, activation of the Shh signaling pathway improved cardiac functions and myocardial remodeling and reduced the apoptosis of myocardial cells.


Keywords

Shh signaling pathway;acute myocardial infarction;agonist SAG1.3;antagonist SANT;cell apoptosis


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