基因组胺H1受体介导的JNK酸化通过Gq蛋白依赖但与阿雷斯无关的途径来调节
Shotaro Michinaga1, Ayaka Nagata1, Ryosuke Ogami1
1Department of Pharmacodynamics, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
International journal of molecular sciences
|March 28, 2024
概括
组胺H1受体通过Gq蛋白,和PKC激活JNK,独立于逮捕素和GRKs. 这种途径与ERK激活不同,突出了不同的信号机制.
科学领域:
- 分子细胞生物学 分子细胞生物学
- 接收器信号传输 接收器信号传输
- 信号转导路径 信号转导路径
背景情况:
- 阿雷斯调节G蛋白结合受体 (GPCR) 脱敏和内化.
- 阿雷斯还调解了MAP激酶的G蛋白独立激活,如ERK和JNK.
- 基因组H1受体 (H1R) 信号传递涉及Gq蛋白和逮捕因,用于ERK激活.
研究的目的:
- 研究Gq蛋白和逮捕蛋白在H1R介导的JNK激活中的作用.
- 阐明涉及H1R诱导的JNK酸化在CHO细胞中的信号通路.
主要方法:
- 利用了表达野生类型 (WT) H1R,Gq偏差突变 (S487TR) 和阿雷斯偏差突变 (S487A) 的中国仓鼠卵巢 (CHO) 细胞.
- 用组胺刺激细胞和评估的JNK酸化.
- 采用H1R,Gq蛋白,PKC,GRKs,β-arrestin2和clathrin的特定抑制剂,以及一个Ca2+化剂.
主要成果:
- 基因组胺显著增加了WT和S487TR细胞中的JNK酸化,但在S487A细胞中没有.
- 基化被H1R,Gq,PKC抑制剂和Ca2+化剂抑制.
- 抑制GRKs,β-arrestin2或克拉特林并没有影响基因组胺诱导的JNK酸化.
结论:
- 通过Gq蛋白/Ca2+/PKC依赖的通路调节H1R介导的JNK酸化.
- 这种信号通路独立于GRK,阿雷斯和克拉斯的参与.
- 表明H1R介导的ERK和JNK激活的独特机制.
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