VGluT3 BNST神经元传递GABA并限制食,而不影响奖励或厌恶处理
Annie Ly1, Rachel Karnosky1, Emily D Prévost1
1Department of Psychology and Neuroscience, University of Colorado Boulder, 2860 Wilderness Pl, Boulder, CO 80301.
bioRxiv : the preprint server for biology
|January 13, 2025
概括
研究人员确定了终端细胞 (BNST) 床核中的特定神经元,这些神经元使用GABA来抑制下丘脑的养行为. 这些VGluT3 BNST神经元减少食物摄入量,而不会影响焦虑或奖励反应.
科学领域:
- 神经科学是一个神经科学.
- 行为神经科学 行为神经科学
- 神经内分泌学神经内分泌学
背景情况:
- 终端细胞 (BNST) 的床核在养,奖励,厌恶和焦虑方面发挥着作用.
- 了解BNST内的特定神经元群体对于剖析这些复杂的行为至关重要.
研究的目的:
- 为了识别和表征由膀性谷氨酸转运体3 (VGluT3) 表达定义的 BNST 内的独特的神经元群体.
- 研究这些VGluT3 BNST神经元在调节食和焦虑类行为中的功能.
主要方法:
- 利用免疫组织化学方法在BNST中定位VGluT3神经元.
- 进行全细胞补丁电生理学,以评估神经递质释放.
- 采用光遗传学和成像来研究神经元活动和行为反应.
- 在动物模型中评估了食行为和焦虑类范式.
主要成果:
- 鉴定了在中侧BNST中的VGluT3神经元,这些神经元共同表达囊泡GABA载体 (VGaT).
- 这些神经元向下丘脑的弧形核 (ARC) 和副腹核 (PVN) 投射,主要释放GABA.
- 激活BNST VGluT3神经元减少了禁食动物的糖消耗,但没有改变类似焦虑或奖励/厌恶行为的行为.
- 当VGluT3 BNST神经元在腹时,在糖糖消费期间表现出增加的活动.
结论:
- VGluT3 BNST神经元形成一个独特的抑制通路到下丘脑的养中心.
- 这一途径特别抑制了食行为,而不会影响焦虑或奖励处理.
- 这些发现提供了对控制食欲和能量平衡的神经回路的见解.
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