下丘脑POMCTRPM2在骨间BAT热生成中的潜在作用
Ju Hwan Yang1, Arbi Bahtiar Boedi Iman Halanobis1,2, Eun-Hye Byeon1
1Department of Physiology, Institute of Medical Sciences, Gyeongsang National University College of Medicine, Jinju, Republic of Korea.
Experimental & molecular medicine
|September 11, 2025
概括
研究人员发现,POMC神经元中的暂时受体潜在拉斯2 (TRPM2) 调节棕色脂肪组织 (BAT) 热生成. 激活这些POMCTRPM2神经元促进能量消耗和体温,为代谢障碍治疗提供了洞察力.
科学领域:
- 神经科学是一个神经科学.
- 代谢过程中的代谢.
- 生理学 生理学 生理学
背景情况:
- 下丘脑的弧形核调节能量恒温.
- 益梅拉诺科丁 (POMC) 神经元控制食行为和能量消耗.
- 暂时受体潜力美拉斯2 (TRPM2) 是一个已知的温度传感器.
研究的目的:
- 调查TRPM2在POMC神经元中对于棕色脂肪组织 (BAT) 热生成的作用.
- 探索POMC神经元和BAT之间的神经元连接.
- 阐明通过TRPM2调节BAT活动的机制.
主要方法:
- 单细胞逆转录和免疫组织化学,以确定POMC神经元中的TRPM2表达.
- 霍乱毒素B子单元用于追踪POMC和BAT之间的神经元连接.
- 化学遗传学刺激POMC神经元并评估BAT热生成.
- 使用TRPM2阻塞剂和抗剂进行药理抑制.
- 内内注射TRPM2激动剂腺二 (ADPR) 和随后的基因表达和体温的分析.
主要成果:
- 证实POMC神经元的一个子集表达TRPM2.
- 刺激POMC神经元诱导了BAT热生成,该热生成被TRPM2抗剂阻断.
- ADPR使POMC神经元脱极化,并增加了BAT热生成,核心体温和IRF-4表达,这些效应被TRPM2抗剂阻断.
- 通过神经通路,TRPM2调节POMC神经活动,并通过神经通路调节BAT活动.
结论:
- 在POMC神经元中的TRPM2在调节BAT热生成和能量恒温中起着至关重要的作用.
- 这条涉及IRF-4的途径为控制体温提供了一种新的机制.
- 这些发现为开发治疗代谢障碍的治疗策略提供了基础,通过向下丘脑POMCTRPM2神经元.
相关概念视频
Thermoregulation
2.3K
The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
2.3K
Thermosensation
33.7K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
33.7K
Regulation of Food Intake
2.3K
Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
2.3K


![Visualization and Quantification of Brown and Beige Adipose Tissues in Mice using [18F]FDG Micro-PET/MR Imaging](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F62460.jpg&w=3840&q=50)