Regulation of Energy Expenditure by Brainstem GABA Neurons

Overview

Journal Cell

Publisher Cell Press

Specialty Cell Biology

Date 2019 Jul 2

PMID 31257028

Citations 46

Authors

Marc Schneeberger

Luca Parolari

Tania Das Banerjee

Varun Bhave

Putianqi Wang

Bindiben Patel

Thomas Topilko

Zhuhao Wu

Chan Hee J Choi

Xiaofei Yu

Kyle Pellegrino

Esteban A Engel

Paul Cohen

Nicolas Renier

Jeffrey M Friedman

Alexander R Nectow

Affiliations

Soon will be listed here.

Abstract

Homeostatic control of core body temperature is essential for survival. Temperature is sensed by specific neurons, in turn eliciting both behavioral (i.e., locomotion) and physiologic (i.e., thermogenesis, vasodilatation) responses. Here, we report that a population of GABAergic (Vgat-expressing) neurons in the dorsolateral portion of the dorsal raphe nucleus (DRN), hereafter DRN neurons, are activated by ambient heat and bidirectionally regulate energy expenditure through changes in both thermogenesis and locomotion. We find that DRN neurons innervate brown fat via a descending projection to the raphe pallidus (RPa). These neurons also densely innervate ascending targets implicated in the central regulation of energy expenditure, including the hypothalamus and extended amygdala. Optogenetic stimulation of different projection targets reveals that DRN neurons are capable of regulating thermogenesis through both a "direct" descending pathway through the RPa and multiple "indirect" ascending pathways. This work establishes a key regulatory role for DRN neurons in controlling energy expenditure.

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