Metabolic differentiation in the embryonic retina.

Metabolic differentiation in the embryonic retina.
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DOI:
10.1038/ncb2531
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发表时间:
2012-08
影响因子:
21.3
通讯作者:
--
中科院分区:
生物学1区
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与健康的成人组织不同,癌症主要通过有氧糖酵解而不是氧化磷酸化产生能量。这种适应被称为瓦尔堡效应,可能是所有分裂细胞(包括正常细胞和癌性细胞)的一个特征,也可能是癌症所特有的。在发育过程中正常生长的组织中,增殖和有丝分裂后细胞是否以根本不同的方式产生能量尚不清楚。在这里,我们在体内胚胎非洲爪蟾视网膜中发现,与非分裂分化细胞相比,分裂祖细胞较少依赖氧化磷酸化来产生 ATP,而是使用糖原来促进有氧糖酵解。从糖酵解到氧化磷酸化的转变与细胞分化过程有关。糖酵解对于祖细胞增殖和生物合成是不可或缺的,即使它不用于 ATP 生产。这些结果表明,Warburg 效应可能是体内正常增殖的一个特征,并且糖酵解和氧化磷酸化的调节对于正常发育至关重要。
Unlike healthy adult tissues, cancers produce energy mainly by aerobic glycolysis instead of oxidative phosphorylation. This adaptation, called the Warburg effect, may be a feature of all dividing cells, both normal and cancerous, or it may be specific to cancers. Whether in a normally growing tissue during development, proliferating and postmitotic cells produce energy in fundamentally different ways is not known. Here we show in the embryonic Xenopus retina in vivo, that dividing progenitor cells depend less on oxidative phosphorylation for ATP production than non-dividing differentiated cells, and instead use glycogen to fuel aerobic glycolysis. The transition from glycolysis to oxidative phosphorylation is connected to the cell differentiation process. Glycolysis is indispensable for progenitor proliferation and biosynthesis, even when it is not used for ATP production. These results suggest that the Warburg effect can be a feature of normal proliferation in vivo, and that the regulation of glycolysis and oxidative phosphorylation is critical for normal development.
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