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Ventromedial hypothalamic核子集通过预光区域输出刺激组织热生成
Rashmita Basu1, Andrew J Elmendorf1, Betty Lorentz2
1Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN, USA; Lilly Diabetes Research Center, Indiana Biosciences Research Institute, Indianapolis, IN, USA.
Molecular metabolism
|May 10, 2024
概括
中腹下丘脑核 (VMN) PACAP神经元与前视区域 (POA) 连接,以激活棕色和色脂肪组织的热生成,控制能量消耗和体重.
科学领域:
- 神经科学是一个神经科学.
- 代谢调节 代谢调节 代谢调节
- 内分泌学 在内分泌学.
背景情况:
- 脑下垂体信号通过外围机制调节能量消耗和平衡.
- 关键的下垂体部位,如前视区域 (POA) 和中腹下垂体核 (VMN),都与热生成和体重控制有关.
- 刺激能源消耗的特定神经回路在很大程度上仍然没有被描述.
研究的目的:
- 研究VMN神经元刺激脂肪组织热生成的下游机制.
- 确定负责VMN介导的能源支出控制的神经电路.
- 阐明VMNPACAP神经元在调节组织发热和体重方面的作用.
主要方法:
- 使用Sf1Cre和Adcyap1Cre小鼠,以急性和慢性地操纵VMN神经元子集.
- 在标准和高脂肪饮食条件下测量生理参数,组织热生成和体重.
- 采用电生理学,光遗传学和温度微芯片来追踪VMN神经元效应及其对能源消耗的影响.
主要成果:
- 在肥胖小鼠中,VMNSf1神经元的激活减少了体重和脂肪,同时增加了能量消耗.
- 确定了一个VMNPACAP →尾部POA神经回路,可刺激棕色和色脂肪组织中的热生成.
- 这个电路的选择性激活诱导了组织热生成和脂肪组织的基因表达的改变.
结论:
- VMNPACAP →尾部POA神经回路对于脂肪组织热生成和能量平衡至关重要.
- 这种途径在控制能量消耗和体重方面发挥着至关重要的作用.
- 针对这种神经回路提供了管理代谢障碍的潜力.
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