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MicroRNA-145 suppresses ROS-induced Ca2+ overload of cardiomyocytes by targeting CaMKIIδ

Authors
 Min-Ji Cha ; Jin-Kyung Jang ; Ki-Chul Hwang ; Eunmi Choi ; Hyun-Taek Shin ; Hye Jin Hwang ; Woo-min Jeon ; Eunhyun Choi ; Hyang-Hee Seo ; Jiyun Lee ; Jun-Hee Park ; Chang Yeon Lee ; Se-Yeon Lee ; Byeong-Wook Song ; Onju Ham 
Citation
 Biochemical and Biophysical Research Communications, Vol.435(4) : 720~726, 2013 
Journal Title
 Biochemical and Biophysical Research Communications 
ISSN
 0006-291X 
Issue Date
2013
Abstract
A change in intracellular free calcium (Ca(2+)) is a common signaling mechanism of reperfusion-induced cardiomyocyte death. Calcium/calmodulin dependent protein kinase II (CaMKII) is a critical regulator of Ca(2+) signaling and mediates signaling pathways responsible for functions in the heart including hypertrophy, apoptosis, arrhythmia, and heart disease. MicroRNAs (miRNA) are involved in the regulation of cell response, including survival, proliferation, apoptosis, and development. However, the roles of miRNAs in Ca(2+)-mediated apoptosis of cardiomyocytes are uncertain. Here, we determined the potential role of miRNA in the regulation of CaMKII dependent apoptosis and explored its underlying mechanism. To determine the potential roles of miRNAs in H2O2-mediated Ca(2+) overload, we selected and tested 6 putative miRNAs that targeted CaMKIIδ, and showed that miR-145 represses CaMKIIδ protein expression and Ca(2+) overload. We confirmed CaMKIIδ as a direct downstream target of miR-145. Furthermore, miR-145 regulates Ca(2+)-related signals and ameliorates apoptosis. This study demonstrates that miR-145 regulates reactive oxygen species (ROS)-induced Ca(2+) overload in cardiomyocytes. Thus, miR-145 affects ROS-mediated gene regulation and cellular injury responses.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/86902
DOI
10.1016/j.bbrc.2013.05.050
Appears in Collections:
1. 연구논문 > 5. Research Institutes > Yonsei Integrative Research Institute for Cerebral & Cardiovascular Disease
1. 연구논문 > 1. College of Medicine > Yonsei Biomedical Research Center
1. 연구논문 > 1. College of Medicine > Dept. of Internal Medicine
1. 연구논문 > 1. College of Medicine > Dept. of Life Science
Yonsei Authors
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Link
 http://www.sciencedirect.com/science/article/pii/S0006291X13008334
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