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首页> 外文期刊>American Journal of Physiology >Exposure to environmentally persistent free radicals during gestation lowers energy expenditure and impairs skeletal muscle mitochondrial function in adult mice
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Exposure to environmentally persistent free radicals during gestation lowers energy expenditure and impairs skeletal muscle mitochondrial function in adult mice

机译:在妊娠期间暴露于环境持久的自由基降低能量消耗并损害成人小鼠中的骨骼肌线粒体功能

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摘要

We have investigated the effects of in utero exposure to environmentally persistent free radicals (EPFRs) on growth, metabolism, energy utilization, and skeletal muscle mitochondria in a mouse model of diet-induced obesity. Pregnant mice were treated with laboratory-generated, combustion-derived particular matter (MCP230). The adult offspring were placed on a high-fat diet for 12 wk, after which we observed a 9.8% increase in their body weight. The increase in body size observed in the MCP230-exposed mice was not associated with increases in food intake but was associated with a reduction in physical activity and lower energy expenditure. The reduced energy expenditure in mice indirectly exposed to MCP230 was associated with reductions in skeletal muscle mitochondrial DNA copy number, lower mRNA levels of electron transport genes, and reduced citrate synthase activity. Upregulation of key genes involved in ameliorating oxidative stress was also observed in the muscle of MCP230-exposed mice. These findings suggest that gestational exposure to MCP230 leads to a reduction in energy expenditure at least in part through alterations to mitochondrial metabolism in the skeletal muscle.
机译:我们研究了在饮食诱导肥胖症小鼠模型中对环境持久自由基(EPFRS)对环境持久自由基(EPFRS)对生长,新陈代谢,能量利用和骨骼肌线粒体的影响。用实验室产生的燃烧衍生的特定物质(MCP230)治疗怀孕的小鼠。将成人后代置于12周的高脂饮食中,之后我们观察到其体重增加了9.8%。在MCP230暴露的小鼠中观察到的体型的增加与食物摄入量的增加无关,但与身体活动的降低和降低能量消耗有关。暴露于MCP230的小鼠的降低的能量消耗与骨骼肌线粒体DNA拷贝数,电子传输基因降低的降低以及降低的柠檬酸合酶活性有关。在MCP230暴露小鼠的肌肉中也观察到改善氧化应激的关键基因的上调。这些发现表明,在MCP230到MCP230的妊娠风险导致能源支出至少部分地通过骨骼肌中的线粒体代谢的改变来降低。

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