大脑对新陈代谢状态的感知调节了循环的单细胞
Joao Paulo Cavalcanti de Albuquerque1, Jenna Hunter1, Rita G Domingues2,3
1Division of Diabetes, Endocrinology and Gastroenterology, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK.
Science immunology
|April 4, 2025
概括
大脑是大脑的大脑.
科学领域:
- 神经免疫学 神经免疫学
- 代谢调节 代谢调节 代谢调节
- 大脑 - 肠 - 免疫轴
背景情况:
- 能量可用性影响免疫细胞动态,传统上归因于外周代谢.
- 基于能量状态,大脑在调解这些免疫反应中的作用尚未完全被理解.
研究的目的:
- 为了调查大脑对饥饿和腹的感知是否可以单独驱动循环免疫细胞的变化.
- 阐明在禁食期间由大脑介导的免疫调节背后的神经回路和机制.
主要方法:
- 利用转基因小鼠操纵特定的下丘脑神经元,包括阿古蒂相关 (AgRP) 神经元.
- 评估了循环免疫细胞群中的变化,特别是单细胞.
- 研究了下游的信号通路,包括肝脏mTOR信号,交感神经系统活动和皮质水平.
主要成果:
- 促进饥饿的AgRP神经元是足够的和必要的,以减少在禁食期间循环的Ly6C经典单细胞.
- AgRP神经元通过交感通路抑制了肝脏mTOR信号传递,从而降低了化学激素连接体2和单细胞数量.
- 皮质激素释放和葡萄糖皮质激素受体激活在AgRP神经元介导作用中起到了允许作用.
结论:
- 大脑对饥饿的感知,独立于实际的营养水平,足以改变外围免疫细胞动态.
- 揭示了与感知能量状态相关的外周免疫力的新型脑介导控制.
- 突出了AgRP神经元-海波他拉米-交感-肝轴在禁食期间调节单细胞贩运中的作用.
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