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Updated: Jan 10, 2026

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甲状腺素受体结构和与自身抗体的相互作用
European thyroid journal
|November 20, 2025
概括
低温电子显微镜揭示了甲状腺刺激激素受体 (TSHR) 自体抗体如何结合并改变TSHR状态. 了解这些相互作用是开发向TSHR药物的关键.
科学领域:
- 结构生物学是结构生物学.
- 分子内分泌学分子内分泌学
- 免疫学 免疫学 免疫学
背景情况:
- 人类TSH受体 (TSHR) 是一种具有细胞外白丰富的重复 (LRR) 和跨膜域的单体.
- 受体自身抗体 (TRAb) 向细胞外TSHR域,影响受体活性.
- TSHR在非活性和活性状态之间循环,涉及LRD相对于膜的旋转.
研究的目的:
- 使用冷电子显微镜 (Cryo-EM) 阐明单克隆自身抗体对TSHR激活和失活的结构机制.
- 了解不同的TRAbs如何与TSHR结构相互作用并调节其功能.
主要方法:
- 使用冷电子显微镜 (Cryo-EM) 来确定TSHR与各种人类单克隆自身抗体复合的结构.
- 在原子分辨率下分析抗体-受体相互作用.
主要成果:
- 刺激性自身抗体M22TM结合了活跃的TSHR结构,使其稳定并导致长时间的激活.
- 阻断自身抗体K1-70TM与细胞外域结合,防止TSH和TRAb结合.
- 抑制性自身抗体5C9TM与非活性TSHR结合,将其锁定在非活性状态,并阻止TSH/TRAb相互作用.
结论:
- 对TSHR-TRAb相互作用的结构洞察力揭示了受体调节的独特机制.
- 了解这些分子相互作用对于设计针对自身免疫性甲状腺疾病的新型TSHR向疗法至关重要.
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