非共价PPARγ逆agonism的结构决定因素及其治疗影响
Kuang-Ting Kuo1,2, Bilel Bdiri2, Yuanjun He2
1Skaggs Graduate School of Chemical and Biological Sciences, Scripps Research, La Jolla, CA, USA.
Nature communications
|December 19, 2025
概括
研究人员开发了新的PPARγ类似物,可增强胰岛素敏感性,用于2型糖尿病治疗. 这些化合物表现出更好的结合和活性,为更安全的代谢疾病治疗提供了潜在的框架.
科学领域:
- 药用化学 医学化学
- 分子药理学分子药理学
- 内分泌学 在内分泌学.
背景情况:
- 过氧体增殖器激活受体玛 (PPARγ) 是2型糖尿病 (T2D) 的一个关键目标.
- 现有的FDA批准的PPARγ激动剂会产生不良影响,需要更安全的替代品.
- SR10171是一种非共价的部分逆agonist,可以改善胰岛素敏感性,而不会产生骨质损失等不良影响.
研究的目的:
- 对于结构-功能关系来说,要描述SR10171的类似物.
- 定义非共价PPARγ调制背后的机制.
- 为开发下一代胰岛素敏感剂建立一个框架.
主要方法:
- 生物化学试验测量结合力和逆激素活性.
- -交换 (HDX) 来探测蛋白质的动态.
- 计算建模,包括分子动态模拟.
- 在功能丧失的PPARγ变体和患者衍生脂肪细胞中测试类型.
主要成果:
- 具有翻转的内醇支架和N-基替代物的类似物显示了对PPARγ的10到100倍增强的结合.
- 增强的结合和差异性抑制与PPARγ结合口袋和AF2域中的联体诱导动力学相关.
- 类比物恢复了变体中的PPARγ活性,并改善了糖尿病患者脂肪细胞中的胰岛素敏感性.
结论:
- 通过结构功能分析阐明了非共价PPARγ调制的机制.
- 确定了具有改善结合和治疗潜力的类型.
- 建立了开发更安全,下一代胰岛素敏感剂用于代谢疾病的框架.
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