Preoptic BRS3 neurons increase body temperature and heart rate via multiple pathways.

Preoptic BRS3 neurons increase body temperature and heart rate via multiple pathways.
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DOI:
10.1016/j.cmet.2021.05.001
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发表时间:
2021-07-06
期刊:
影响因子:
29
通讯作者:
Reitman ML
Reitman ML
中科院分区:
生物学1区
文献类型:
--
作者:
Piñol RA;Mogul AS;Hadley CK;Saha A;Li C;Škop V;Province HS;Xiao C;Gavrilova O;Krashes MJ;Reitman ML

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视前区 (POA) 是调节体温 (Tb) 的关键大脑区域,决定控制 Tb 的产热反应、心血管反应和行为反应。先前表征的 POA 神经元群在激活时都会降低 Tb。现在,我们利用小鼠,将表达铃蟾肽样受体 3 (POABRS3) 的 POA 神经元识别为激活增加 Tb 的群体;相反,急性抑制这些神经元会降低 Tb。 POABRS3 神经元投射到下丘脑室旁核或下丘脑背内侧,通过交感神经系统增加 Tb、心率和血压。 POABRS3 神经元的长期失活导致 Tb 变异性增加,超过 Tb 设定点的增加和减少,RNA 表达谱表明 POABRS3 神经元有多种类型。因此,POABRS3 神经元群调节 Tb 和心率,有助于冷防御,并微调 Tb 的反馈控制。这些发现促进了对恒温这一哺乳动物生物学的决定性特征的理解。先前发现的视前区神经元在激活时会降低体温。皮诺尔等人。报道称,表达铃蟾肽样受体 3 的视前神经元 (POABRS3) 激活时温度升高,表明其具有防御寒冷的作用。存在多个 POABRS3 群体。此外,POABRS3 神经元可以微调体温的反馈控制并调节心率。
The preoptic area (POA) is a key brain region for regulation of body temperature (Tb), dictating thermogenic, cardiovascular, and behavioral responses that control Tb. Previously characterized POA neuronal populations all reduced Tb when activated. Using mice, we now identify POA neurons expressing bombesin-like receptor 3 (POABRS3) as a population whose activation increased Tb; inversely, acute inhibition of these neurons reduced Tb. POABRS3 neurons that project to either the paraventricular nucleus of the hypothalamus or the dorsomedial hypothalamus increased Tb, heart rate, and blood pressure via the sympathetic nervous system. Long-term inactivation of POABRS3 neurons caused increased Tb variability, overshooting both increases and decreases in Tb set point, with RNA expression profiles suggesting multiple types of POABRS3 neurons. Thus, POABRS3 neuronal populations regulate Tb and heart rate, contribute to cold-defense, and fine-tune feedback control of Tb. These findings advance understanding of homeothermy, a defining feature of mammalian biology. Previously identified preoptic area neurons reduce body temperature when activated. Piñol et al. report that bombesin-like receptor 3-expressing preoptic (POABRS3) neurons increase temperature when activated, indicating a role in defense from the cold. Multiple POABRS3 populations exist. Additionally, POABRS3 neurons fine-tune feedback control of body temperature and regulate heart rate.
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