G蛋白结合雌激素受体与LH受体的异构化会导致G蛋白信号偏差
Clara Lazzaretti1, Samantha Sperduti1,2, Ginevra Pelagatti1
1Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Baggiovara Hospital, Modena 41126, Italy.
Endocrinology
|November 21, 2025
概括
G蛋白结合雌激素受体 (GPER) 与LH/hCG受体 (LHCGR) 形成复合体,选择性地抑制Gq蛋白信号传递. 这种相互作用为Gq驱动的瘤提供了潜在的治疗标.
科学领域:
- 内分泌学 在内分泌学.
- 分子细胞生物学分子细胞生物学
- G蛋白结合受体 (GPCR) 研究研究
背景情况:
- 黄素激素/胆激素受体 (LHCGR) 和G蛋白合雌激素受体 (GPER) 在卵巢中共同表达,在生殖和病理生理学中发挥作用.
- 关于GPER的确切功能仍在争论中,有证据表明它与其他GPCR形成异构复合体,从而调节它们的信号传递.
研究的目的:
- 调查LHCGR和GPER之间的潜在相互作用.
- 为了确定GPER是否影响LHCGR介导的信号通路.
主要方法:
- 使用HEK293细胞研究LHCGR-GPER异构体的形成及其对信号传输的影响.
- 评估了联体介导途径,包括Gq和Gs蛋白合,脂酶C激活以及下游的转录和线粒生成效应.
- 实验涉及野生类型和突变GPER,以及不同水平的内源和外源Gq蛋白表达.
主要成果:
- 发现LHCGR-GPER异构体通过抑制Gq蛋白合来全调节LH/hCG信号传递.
- 这种抑制导致了脂酶C通路的抑制以及相关的转录和代功能.
- 效果取决于GPER形成异构体的能力和Gq蛋白的可用性,选择性抑制Gq通路,但不抑制Gs/cAMP通路.
结论:
- GPER作为LHCGR的调节器,选择性地抑制Gq介导的信号通路.
- 形成LHCGR-GPER异构体为准依赖Gq信号传递的瘤提供了潜在的治疗策略.
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