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首页> 外文期刊>Journal of cellular physiology. >Malate-aspartate shuttle promotes L-lactate oxidation in mitochondria
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Malate-aspartate shuttle promotes L-lactate oxidation in mitochondria

机译:Malate-aspartate航天飞机促进L-lactate在线粒体氧化

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Metabolism in cancer cells is rewired to generate sufficient energy equivalents and anabolic precursors to support high proliferative activity. Within the context of these competing drives aerobic glycolysis is inefficient for the cancer cellular energy economy. Therefore, many cancer types, including colon cancer, reprogram mitochondria-dependent processes to fulfill their elevated energy demands. Elevated glycolysis underlying the Warburg effect is an established signature of cancer metabolism. However, there are a growing number of studies that show that mitochondria remain highly oxidative under glycolytic conditions. We hypothesized that activities of glycolysis and oxidative phosphorylation are coordinated to maintain redox compartmentalization. We investigated the role of mitochondria-associated malate-aspartate and lactate shuttles in colon cancer cells as potential regulators that couple aerobic glycolysis and oxidative phosphorylation. We demonstrated that the malate-aspartate shuttle exerts control over NAD+/NADH homeostasis to maintain activity of mitochondrial lactate dehydrogenase and to enable aerobic oxidation of glycolytic L-lactate in mitochondria. The elevated glycolysis in cancer cells is proposed to be one of the mechanisms acquired to accelerate oxidative phosphorylation.
机译:在癌症细胞代谢产生中枢足够的能量等价物和合成代谢支持高增生性的先兆活动。驱动器有氧糖酵解是低效的癌症细胞的能源经济。癌症类型,包括结肠癌、重组mitochondria-dependent流程履行高能源需求。底层Warburg效应是一个建立签名的癌症新陈代谢。越来越多的研究表明吗线粒体仍高度氧化糖酵解的条件。活动的糖酵解和氧化磷酸化是协调维护氧化还原划分。mitochondria-associated malate-aspartate和在结肠癌细胞乳酸航天飞机潜在的监管机构,一些有氧糖酵解和氧化磷酸化。证明了malate-aspartate航天飞机施加控制NADH / NAD +体内平衡维持线粒体活性乳酸脱氢酶,使有氧氧化糖酵解L-lactate线粒体。提出了高糖酵解在癌症细胞的机制了加速氧化磷酸化。

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