AgRP神经元活动促进感官和营养信号之间的关联,以指导品味偏好
Nathaniel T Nyema1,2, Aaron D McKnight1,2, Alexandra G Vargas-Elvira1
1Monell Chemical Senses Center, Philadelphia PA 19104, USA.
bioRxiv : the preprint server for biology
|October 3, 2023
概括
阿古蒂相关蛋白 (AgRP) 神经元活动增强了口味营养学,通过性别特异的机制. 这些神经元跟踪和更新食物线索和它们的营养价值之间的学习关联.
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
- 神经生物学 神经生物学 神经生物学
背景情况:
- 感官食物线索和营养价值之间的学会关联驱动饮食行为.
- 表达阿古蒂相关蛋白 (AgRP) 的神经元对于养行为至关重要,但它们在味道营养学习中的作用尚不清楚.
研究的目的:
- 研究AgRP表达神经元在调解风味营养学 (FNL) 中的作用.
- 检查食物摄入期间AgRP神经元的光遗传刺激如何影响FNL.
- 用纤维光度测量来确定内源AgRP神经元活动如何跟踪口味-营养关联.
主要方法:
- 在小鼠的食物摄入过程中,AgRP神经元的光遗传刺激.
- 纤维光度仪在体内监测内源性AgRP神经元活动.
- 行为测试以测量风味偏好的发展和消费.
主要成果:
- 意想不到的是,在FNL期间,增强性AgRP神经元活动增强了,而不是阻止了风味偏好的发展.
- 在雄性小鼠中,AgRP神经元活动增加了风味消耗,加强了风味与营养的关联.
- 在雌性小鼠中,AgRP神经元活动增强了独立于消费的风味-营养素偏好,这表明奖励价值增加.
- 在体内神经活动分析显示,AgRP神经元在两性中都能跟踪味道与营养的关联.
结论:
- AgRP神经元活动以性别依赖的方式增强了风味-营养的关联.
- AgRP神经元动态跟踪和更新已学习的风味-营养关联.
- 这些发现揭示了AgRP神经元在整合感官和营养信号以增强食物中的功能.
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