Suppression of miR-181 a attenuates H2O2-induced death of mesenchymal stem cells by maintaining hexokinase II expression
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Seahyoung Lee [2] ; Ina Yun [1] ; Onju Ham [1] ; Se-Yeon Lee [1] ; Chang Yeon Lee [1] ; Jun-Hee Park [1] ; Jiyun Lee [1] ; Hyang-Hee Seo [1] ; Eunhyun Choi [2] ; Ki-Chul Hwang [2]
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[1] Yonsei University
Yonsei University
Corea del Sur
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[2] Catholic Kwandong University College of Medicine Institute for Bio-Medical Convergence
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- Localización: Biological Research, ISSN-e 0717-6287, ISSN 0716-9760, Nº. 48, 2015
- Idioma: inglés
- Enlaces
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Resumen
BACKGROUND: Low survival rate of transplanted cells compromises the efficacy of cell therapy. Hexokinase II (HKII) is known to have anti-apoptotic activity through its interaction with mitochondria. The objective was to identify miRNAs targeting HKII and investigate whether miRNA-mediated modulation of HKII could improve the survival of mesenchymal stem cells (MSCs) exposed to H2O2. The expression of HKII in MSCs exposed to H2O2 was evaluated, and HKII-targeting miRNA was screened based on miRNA-target prediction databases. The effect of H2O2 on the expression of the selected HKII-targeting miRNA was examined and the effect of modulation of the selected HKII-targeting miRNA using anti-miRNA on H2O2-induced apoptosis of MSC was evaluated. RESULTS: H2O2 (600 μΜ) induced cell death of MSCs and decreased mitochondrial HKII expression. We have identified miR-181a as a HKII-targeting miRNA and H2O2 increased the expression of miR-181a in MSCs. Delivery of anti-miR-181a, which neutralizes endogenous miR-181a, significantly attenuated H2O2-induced decrease of HKII expression and disruption of mitochondrial membrane potential, improving the survival of MSCs exposed to H2O2. CONCLUSIONS: These findings suggest that H2O2-induced up-regulation of miR-181a contributes to the cell death of MSCs by down-regulating HKII. Neutralizing miR-181a can be an effective way to prime MSCs for transplantation into ischemic tissues.
