Genetically encoded fluorescent sensors for intracellular NADH detection.

Genetically encoded fluorescent sensors for intracellular NADH detection.
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DOI:
10.1016/j.cmet.2011.09.004
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发表时间:
2011-10-05
期刊:
影响因子:
29
通讯作者:
Loscalzo J
Loscalzo J
中科院分区:
生物学1区
文献类型:
--
作者:
Zhao Y;Jin J;Hu Q;Zhou HM;Yi J;Yu Z;Xu L;Wang X;Yang Y;Loscalzo J

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我们已经开发了用于还原性烟酰胺腺嘌呤二核苷酸(NADH)的遗传编码荧光传感器,其在NADH结合时表现出很大的荧光变化。我们通过监测受NADH转运、葡萄糖代谢、电子传递链功能和氧化还原环境影响的亚细胞器中NADH水平的动态变化,证明了这些传感器在哺乳动物细胞中的实用性,并证明了线粒体和细胞质内NADH水平随扰动变化的时间分离。这些结果支持细胞质内NADH对环境变化敏感的观点,而线粒体具有维持生理NADH稳态的强烈倾向。这些传感器为测量细胞内NAD(P)H内源性荧光的现有技术提供了一个非常好的替代方案,并且由于其优越的灵敏度和特异性,可以选择性地监测这种基本辅助因子的总细胞和区室反应。
We have developed genetically encoded fluorescent sensors for reduced nicotinamide adenine dinucleotide (NADH), which manifest a large change in fluorescence upon NADH binding. We demonstrate the utility of these sensors in mammalian cells by monitoring the dynamic changes in NADH levels in subcellular organelles as affected by NADH transport, glucose metabolism, electron transport chain function, and redox environment, and we demonstrate the temporal separation of changes in mitochondrial and cytosolic NADH levels with perturbation. These results support the view that cytosolic NADH is sensitive to environmental changes, while mitochondria have a strong tendency to maintain physiological NADH homeostasis. These sensors provide a very good alternative to existing techniques that measure endogenous fluorescence of intracellular NAD(P)H and, owing to their superior sensitivity and specificity, allow for the selective monitoring of total cellular and compartmental responses of this essential cofactor.
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