在质神经元中的GPR75调节身体体重
Steven C Wyler1, Surbhi Gahlot1, Lara Bideyan1
1Center for Hypothalamic Research, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX 75390, USA.
Cell reports
|February 21, 2026
概括
谷氨酸神经元中的G蛋白结合受体75 (GPR75) 损失通过减少食物摄入来防止饮食引起的肥胖. 在这些神经元中重新激活GPR75会逆转这种保护作用,突出其在体重调节中的作用.
科学领域:
- 神经科学是一个神经科学.
- 代谢研究研究 代谢研究
- 遗传学 是一个遗传学.
背景情况:
- G蛋白结合受体75 (GPR75) 是饮食诱导肥胖症 (DIO) 的潜在治疗标.
- 人类GPR75中的功能丧失突变与较低的体重指数 (BMI) 相相关,Gpr75缺乏的小鼠对DIO有抗性.
研究的目的:
- 在饮食诱导的肥胖的背景下,研究GPR75在谷氨酸和GABAergic神经元中的特定作用.
- 确定特定神经元群体中GPR75的选择性删除或重新激活是否会影响体重调节和食物摄入.
主要方法:
- 基因改造小鼠的生成允许Cre-依赖的Gpr75.5的删除或重新激活.
- 在vGlut2+谷氨基基神经元 (Gpr75vGlut2-KO) 和GABAergic神经元中选择性删除Gpr75.
- 在Gpr75无细胞小鼠 (Gpr75TB) 的vGlut2表达细胞中重新激活Gpr75.
- 评估高脂肪饮食 (HFD) 的小鼠的体重,食物摄入量和能量消耗.
主要成果:
- 谷氨酸性神经元中Gpr75的丧失 (Gpr75vGlut2-KO) 提供了对HFD诱导的体重增加的保护.
- 在GABAergic神经元中删除Gpr75并没有对DIO进行保护.
- 雄性Gpr75vGlut2-KO小鼠在HFD上表现出减少的食物摄入量,而没有改变能量消耗.
- 在vGlut2表达细胞 (Gpr75TB) 中Gpr75的重新激活完全挽救了HFD诱导的体重增加,而在GABAergic细胞中的重新激活没有影响.
结论:
- 谷氨酸神经元在GPR75介导的食物摄入调节和预防肥胖方面发挥着至关重要的作用.
- 在HFD的反应中,控制身体重量至关重要,GPR75在质质激素通路内发出特定的信号.
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