GPR39通过胆汁酸介导的分子信号传递
Yanyun Huang1, Zhentao Zi2, Chenliang Xia2
1Department of Pharmacology School of Basic Medical Sciences and Center for AI Therapeutics, Fudan University Shanghai Medical College, Shanghai 200032, China,; School of Basic Medical Sciences, Capital Medical University, Chinese Institutes for Medical Research (CIMR), Beijing 100069, China.
The Journal of biological chemistry
|February 6, 2026
概括
胆酸 (BAs),特别是3-O-硫酸的形式,如LCAS,TLCAS和GLCAS,激活GPR39受体. 这一发现揭示了胆酸在细胞通信中的新信号通路.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 胃肠病学 胃肠病学
背景情况:
- 胆汁酸 (BAs) 传统上被称为消化.
- 新出现的证据表明BA还充当关键的生物信号分子.
- 目前尚不完全了解G蛋白结合受体GPR39的功能.
研究的目的:
- 为了确定激活GPR39.9的特定胆酸.
- 描述由胆汁酸激活GPR39下游的信号通路.
- 为了验证GPR39作为硫酸胆汁酸的受体.
主要方法:
- 在培养细胞和胰腺细胞中测量细胞内.
- 在Xenopus卵细胞中进行电生理学记录.
- 纳米BiT,ONE-GO,TANGO测定和Ca2+成像被用于验证GPR39激活.
- 对Gpr39淘汰赛小鼠和突变性研究的分析.
主要成果:
- 3O-硫酸胆酸,包括石灰酸3-硫酸 (LCAS),石灰酸3-硫酸 (TLCAS) 和石灰酸3-硫酸 (GLCAS),被确定为GPR39.9的强有力的激活剂.
- 这些硫酸BA的GPR39激活涉及多个Gα蛋白亚型 (Gαq,Gαi和Gα12/13).
- 胰腺和肝脏中LCAS诱导的ERK1/2酸化在Gpr39淘汰小鼠中显著降低,证实了GPR39在这个信号通路中的作用.
结论:
- GPR39是特定的3-O-硫酸胆酸的受体.
- 硫酸胆酸会通过GPR39.9触发各种G蛋白信号级联.
- 这项研究揭示了GPR39下游的新型信号分子,扩大了我们对胆酸信号的理解.
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