P2Y2受体介导终端脂肪细胞分化和胰岛素抵抗:证据表明双G蛋白合模式
Shenqi Qian1, Yi Shi2, Jared Senfeld2
1Department of Drug Discovery and Development, Harrison College of Pharmacy, Auburn University, Auburn, Alabama, USA; Department of Pharmacy, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
The Journal of biological chemistry
|December 23, 2023
概括
在脂肪细胞发育和炎症过程中,P2Y2受体 (P2Y2R) 被上调. P2Y2R激活通过抑制AKT信号来促进胰岛素抵抗,这表明它是肥胖和2型糖尿病治疗的目标.
科学领域:
- 分子内分泌学分子内分泌学
- 代谢信号传递 代谢信号传递
- 脂肪细胞生物学 脂肪细胞生物学
背景情况:
- P2Y核酸受体与脂肪细胞分化和胰岛素抵抗有关.
- 在人类细胞中涉及的特定P2Y受体亚型和机制仍然不清楚.
- 肥胖和炎症与改变的代谢过程有关.
研究的目的:
- 确定参与人类脂肪细胞分化和胰岛素抵抗的P2Y受体亚型.
- 阐明P2Y受体影响这些过程的分子机制.
- 评估针对代谢障碍的特定P2Y受体的治疗潜力.
主要方法:
- 使用了人体初级内脏前脂肪细胞和成熟脂肪细胞.
- 在脂肪生成期间和TNFα治疗后研究了P2Y受体表达.
- 评估了细胞内信号通路 (Ca2+,ERK1/2,JNK,AKT,cAMP) 和葡萄糖的吸收.
- 使用的P2Y2受体抗剂 (AR-C 118925XX) 和淘汰赛小鼠模型.
- 分析了体重,脂肪组织质量和巨细胞透.
主要成果:
- P2Y2核酸受体 (P2Y2R) 是脂肪生成过程中最上调的P2Y亚型,并进一步由TNFα诱导.
- 激活P2Y2R刺激了Ca2+,ERK1/2和JNK信号,抑制了AKT酸化,GLUT4转位和葡萄糖吸收.
- 激活P2Y2R抑制了PIP3生成,并触发了Gαi蛋白合,影响了cAMP水平.
- 在小鼠中,P2Y2R抗体治疗抑制了脂肪生成;P2Y2R敲击减少了饮食引起的体重增加和脂肪组织炎症.
结论:
- 终端脂肪细胞分化和炎症选择性上调人体细胞中的P2Y2R表达.
- P2Y2R通过抑制AKT信号通路和葡萄糖吸收来调解胰岛素耐药性.
- P2Y2R代表了对抗肥胖和2型糖尿病的潜在治疗标.
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