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首页> 外文期刊>The journals of gerontology.Series A. Biological sciences and medical sciences >Effects of exercise on mitochondrial content and function in aging human skeletal muscle.
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Effects of exercise on mitochondrial content and function in aging human skeletal muscle.

机译:运动对衰老的人体骨骼肌线粒体含量和功能的影响。

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Skeletal muscle mitochondria are implicated with age-related loss of function and insulin resistance. We examined the effects of exercise on skeletal muscle mitochondria in older (age = 67.3 +/- 0.6 years) men (n = 5) and women (n = 3). Similar increases in (p <.01) cardiolipin (88.2 +/- 9.0 to 130.6 +/- 7.5 microg/mU creatine kinase activity [CK]) and the total mitochondrial DNA (1264 +/- 170 to 1895 +/- 273 copies per diploid of nuclear genome) reflected increased mitochondria content. Succinate oxidase activity, complexes 2-4 of the electron transport chain (ETC), increased from 0.13 +/- 0.02 to 0.20 +/- 0.02 U/mU CK (p <.01). This improvement was more pronounced (p <.05) in subsarcolemmal (127 +/- 48%) compared to intermyofibrillar (56 +/- 12%) mitochondria. NADH oxidase activity, representing total ETC activity, increased from 0.51 +/- 0.09 to 1.00 +/- 0.09 U/mU CK (p <.01). In conclusion, exercise enhances mitochondria ETC activity in older human skeletal muscle, particularly in subsarcolemmal mitochondria, which is likely related to the concomitant increases in mitochondrial biogenesis.
机译:骨骼肌线粒体与年龄相关的功能丧失和胰岛素抵抗有关。我们检查了运动对年龄较大(年龄= 67.3 +/- 0.6岁)的男性(n = 5)和女性(n = 3)中骨骼肌线粒体的影响。 (p <.01)心磷脂(88.2 +/- 9.0至130.6 +/- 7.5 microg / mU肌酸激酶活性[CK])和线粒体总DNA(1264 +/- 170至1895 +/- 273个拷贝)的增加类似核基因组的每个二倍体)反映线粒体含量增加。电子传输链(ETC)的2-4配合物琥珀酸氧化酶活性从0.13 +/- 0.02增加到0.20 +/- 0.02 U / mU CK(p <.01)。与肌原纤维间线粒体(56 +/- 12%)相比,肌膜下(127 +/- 48%)的这种改善更为明显(p <.05)。代表总ETC活性的NADH氧化酶活性从0.51 +/- 0.09 U / mU CK增加到1.00 +/- 0.09 U / mU CK(p <.01)。总之,运动可以增强老年人骨骼肌线粒体ETC的活性,特别是在肌膜下线粒体中,这可能与线粒体生物发生的同时增加有关。

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