Induction of microRNA-24 by HIF-1 protects against ischemic injury in rat cardiomyocytes

Title:

Induction of microRNA-24 by HIF-1 protects against ischemic injury in rat cardiomyocytes

Creator:

Li, Dong-Feng, Tian, Jing, Guo, X., Huang, L.-M., Xu, Y., Wang, C.-C., Ren, A.-J., Yuan, W.-J., and Lin, L.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:f5fb7b3e-26ad-48ca-90f8-5112a8c3fae2
uuid:f5fb7b3e-26ad-48ca-90f8-5112a8c3fae2

Subject:

Fyziologie člověka a srovnávací fyziologie, fyziologie člověka, human physiology, microRNA, myocardial ischemia, apoptosis, cardiomyocytes, 14, and 612

Type:

article, články, model:article, and TEXT

Description:

MicroRNAs are emerging as important regulators of cardiac function. This study investigated the role of microRNA-24 (miR-24) in ischemic cardiomyocytes, based on the observation that miR-24 expression was significantly enhanced in the ischemic myocardium of rats. Using primary cultured rat cardiomyocytes, cell injury was induced by ischemic conditions, and the cells were evaluated for changes in lactate dehydrogenase (LDH) release, cell viability, apoptosis and necrosis. The results showed that miR-24 was increased in myocytes exposed to ischemia. When miR-24 was further overexpressed in ischemic myocytes using the mimic RNA sequence, LDH release was reduced, cell viability was enhanced, and apoptosis and necrosis rates were both decreased. By contrast, a deficiency in miR-24 resulted in the largest LDH release, lowest cell viability and highest apoptosis and necrosis rates in normal and ischemic myocytes, with significant changes compared to that of non-transfected myocytes. Additionally, the mRNA and protein levels of the pro-apoptotic gene, BCL2L11, were down-regulated by miR-24 overexpression and up-regulated by miR-24 deficiency. The luciferase reporter assay confirmed BCL2L11 to be a target of miR-24. Overall, this study showed a protective role for miR-24 against myocardial ischemia by inhibiting BCL2L11, and may represent a potential novel treatment for ischemic heart disease., D.-F. Li ... [et al.]., and Obsahuje seznam literatury

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2012 Volume:61 | Number:6

Harvested from:

CDK

Metadata only:

false