| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Research Abstract |
Although exercise and drug therapy is important to prevent progress of an arteriosclerotic disease, exercise performance leads to increase drug-induced muscle injury. So the elucidation of this mechanism is needed for avoiding muscular disorder. Since exercise performance induced the expression of monocarboxylate transporter (MCT) 4, we focused on the association between MCT4 and HMG-CoA reductase inhibitors such as statins-induced muscle injury. Atorvastatin, one of statins reduced the number of viable cells and caused dramatic morphological changes and caspase-3/7 activation, and induced MCT4 expression levels in RD cell line as a model of in vitro skeletal muscle. Two siRNAs (10 nM) for MCT4 significantly decreased MCT4 expression at 72 h after transfected to RD cells. Atorvastatin-induced RD cell injury was blocked by MCT4 siRNAs transfected to RD cells. These results suggest that the mechanism of statin-induced muscle injury was associated with MCT4 expression.
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