Whole-organism screening for gluconeogenesis identifies activators of fasting metabolism.

Whole-organism screening for gluconeogenesis identifies activators of fasting metabolism.
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DOI:
10.1038/nchembio.1136
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发表时间:
2013-02
影响因子:
14.8
通讯作者:
--
中科院分区:
生物学1区
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改善能量平衡的控制可以降低代谢受损个体的心血管风险。为了确定全身能量控制的新调节因子,我们在转基因报告斑马鱼中进行了高通量筛选,寻找调节禁食诱导的糖异生基因pck 1表达的小分子。我们表明,这一体内策略确定了几种影响人类糖异生的药物,以及代谢未确定的化合物。最值得注意的是,我们发现转运蛋白的配体PK 11195和Ro5-4864是降糖剂,尽管对PCK1的表达有很强的诱导作用。我们证明,这些药物是禁食类能量状态的激活剂,重要的是,它们保护高脂饮食诱导的肥胖小鼠免受肝骨病和葡萄糖耐量异常的影响,这是代谢失调的两种病理表现。因此,使用整体筛选策略,这项研究已经确定了新的空腹代谢小分子激活剂。
Improving the control of energy homeostasis can lower cardiovascular risk in metabolically compromised individuals. To identify new regulators of whole-body energy control, we conducted a high-throughput screen in transgenic reporter zebrafish for small molecules that modulate the expression of the fasting-inducible gluconeogenic gene pck1. We show that this in vivo strategy identified several drugs that impact gluconeogenesis in humans, as well as metabolically uncharacterized compounds. Most notably, we find that the Translocator Protein (TSPO) ligands PK 11195 and Ro5-4864 are glucose lowering agents despite a strong inductive effect on pck1 expression. We show that these drugs are activators of a fasting-like energy state, and importantly that they protect high-fat diet induced obese mice from hepatosteatosis and glucose intolerance, two pathological manifestations of metabolic dysregulation. Thus, using a whole-organism screening strategy, this study has identified new small molecule activators of fasting metabolism.
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