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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >A peroxisome proliferator-activated receptor #gamma# ligand inhibits adipocyte differentiation
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A peroxisome proliferator-activated receptor #gamma# ligand inhibits adipocyte differentiation

机译:过氧化物酶体增殖物激活受体#γ#配体抑制脂肪细胞分化

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摘要

The peroxisome proliferator-activated rccep- tors (PPARs) are nuclear hormone receptors that regulate glucose and lipid homeostasis. The PPAR#gamma# subtype plays a central role in the regulation of adipogenesis and is the molecular target for the 2,4-thiazolidinedione class of antidi- abetic drugs. Structural studies have revealed that agonist ligands activate the PPARs through direct interactions with the C-terminal region of the ligand-binding domain, which includes the activation function 2 helix. GW0072 was identi- fied as a high-affinity PPAR#gamma#, ligand that was a weak partial agonist of PPAR#gamma# transactivation. X-ray crystallography re- vealed that GW0072 occupied the ligand-binding pocket by using different epitopes than the known PPAR agonists and did not interact with the activation function 2 helix. In cell culture, GW0072 was a potent antagonist of adipocyte differ- entiation. These results establish an approach to the design of PPAR Iigands with modified biological activities.
机译:过氧化物酶体增殖物激活受体(PPAR)是调节葡萄糖和脂质稳态的核激素受体。 PPAR#γ#亚型在脂肪形成的调节中起着核心作用,是2,4-噻唑烷二酮类抗糖尿病药物的分子靶标。结构研究表明,激动剂配体通过与配体结合域的C端区域(包括激活功能2螺旋)的直接相互作用来激活PPAR。 GW0072被鉴定为高亲和力的PPAR#γ#配体,是PPAR#γ#反式激活的弱部分激动剂。 X射线晶体学显示,GW0072通过使用与已知PPAR激动剂不同的表位占据了配体结合口袋,并且不与激活功能2螺旋相互作用。在细胞培养中,GW0072是脂肪细胞分化的有效拮抗剂。这些结果为设计具有修饰生物活性的PPAR配体提供了一种方法。

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