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首页> 外文期刊>European Journal of Translational Myology >Oxidative stress and muscle aging: influence of age, sex, fiber composition and function
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Oxidative stress and muscle aging: influence of age, sex, fiber composition and function

机译:氧化应激和肌肉衰老:年龄,性别,纤维成分和功能的影响

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Aim of this research was to study human muscle aging and the influence of oxidative stress correlated with physiological factors (age, sex, fiber composition and function) by measuring the antioxidant enzymes activities: total and mitochondrial superoxide dismutase (total and MnSOD), catalase (CAT), glutathione peroxidase(GSHPx) the levels of glutathione and glutathione disulfide (GSH and GSSG) and redox index. We also measured the lipid peroxide amount . As about age-related changes, we studied 120 samples (18-91 year-old) and we noted the presence of a correlation between age and ROS-mediated damages. Futhermore, it seems that 65 years could be the age at which ROS-dependent damage becomes crucial and begins to show up. Our data about sex-dependent changes showed how males may be potentially more vulnerable to oxidative damage than females. Study about fiber composition in old group (65-90 year-old) reported that subjects with +40% type II fibers not only have lipoperoxide levels lower but also detossifing system against superoxide anion more efficent than –40% type II fibers group. We also study aging process in muscle with different functions (“active”: characterized by rapid and coordinated changes during contraction, “inactive”: generating low levels of tension and maintaining this for a great duration). We observed that ROS-mediated oxidative mechanisms are different in “inactive” vs. “active” muscles.asting
机译:这项研究的目的是通过测量抗氧化酶的活性来研究人类肌肉的衰老以及与生理因素(年龄,性别,纤维成分和功能)相关的氧化应激的影响:总抗氧化酶和线粒体超氧化物歧化酶(总和MnSOD),过氧化氢酶( CAT),谷胱甘肽过氧化物酶(GSHPx),谷胱甘肽和谷胱甘肽二硫化物(GSH和GSSG)的水平以及氧化还原指数。我们还测量了脂质过氧化物的量。关于与年龄相关的变化,我们研究了120个样本(18-91岁),并注意到年龄与ROS介导的损害之间存在相关性。此外,似乎ROS依赖性损害变得至关重要并开始显现的年龄可能为65岁。我们有关性别依赖性变化的数据表明,男性可能比女性更容易受到氧化损伤。老年组(65-90岁)中纤维成分的研究报告说,与40%的II型纤维组相比,具有+ 40%的II型纤维的受试者不仅具有较低的脂过氧化物水平,而且还具有针对超氧阴离子的去毒系统。我们还研究了具有不同功能的肌肉的衰老过程(“活动”:在收缩过程中具有快速而协调的变化;“非活动”:产生低水平的张力并保持较长时间)。我们观察到ROS介导的氧化机制在“非活动”肌肉与“活动”肌肉中有所不同。

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