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格雷林招募内类系统来调节食物奖励

Alexander Edwards¹, Stephanie DeSante¹, Carl Duncan Spencer¹

¹Neuroscience Department, Carleton University, Ottawa, Ontario K1S5B6, Canada.

The Journal of neuroscience : the official journal of the Society for Neuroscience

|January 8, 2025

概括

格雷林通过激活大脑中的多巴胺细胞来刺激食.

科学领域:

神经科学是一个神经科学.
内分泌学在内分泌学.
分子生物学分子生物学

背景情况:

格林激素是一种激素,通过生长激素分泌受体 (GHSR) 刺激食.
通过大麻素受体-1 (CB-1R) 的内分类固醇,也促进寻找食物的行为.
在腹膜区域 (VTA) 调节食物动机的格林和内分泌素之间的相互作用是未知的.

研究的目的:

调查GHSR与VTA中的CB-1R信号之间的相互作用.
为了确定这种相互作用是否影响食物动机.

主要方法:

在雄性和雌性大鼠和小鼠的VTA细胞中检查了GHSR和CB-1RmRNA表达.
研究了 ghrelin 在 VTA 中对多巴胺细胞的影响.
评估了GHSR信号干扰对VTA内大麻素水平和基因表达的影响.
利用了VTA CB-1Rs的药理学对抗作用.
阻断了VTA中的大麻素分解.

主要成果:

在VTA细胞中表达GHSR和CB-1R,在多巴胺细胞中表达GHSR,在非多巴胺细胞中表达CB-1R.
格林林直接激活VTA多巴胺细胞.
在雄性大鼠中,GHSR信号干扰改变了与内分泌类型相关的基因表达,并降低了VTA中的2-阿拉基多诺伊尔糖醇 (2-AG).
在VTA中的CB-1R对抗性降低了格林的氧化和食欲效应.
阻止VTA中的大麻素分解增强了格林对食物动机的影响.

结论:

格林激发VTA多巴胺细胞和食物动机.
这种效应部分通过VTA中的CB-1Rs通过内分泌大麻素信号传递来调节.

关键词:

多巴胺是多巴胺的一种.电力生理学电力生理学这是内分泌大麻素 (endocannabinoids) 的作用.食物奖励食物奖励格林激素是什么格林激素是什么运营商响应了响应.

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