2024-03-28 マックス・プランク研究所
<関連情報>
- https://www.mpg.de/21759308/0328-psy-a-brain-circuit-that-spoils-your-appetite-155111-x
- https://www.cell.com/cell-reports/fulltext/S2211-1247(24)00318-8
吐き気による摂食抑制は、中枢扁桃体Dlk1発現ニューロンによって媒介される Nausea-induced suppression of feeding is mediated by central amygdala Dlk1-expressing neurons
Wenyu Ding,Helena Weltzien,Christian Peters,Rüdiger Klein
Cell Reports Published:March 27, 2024
DOI:https://doi.org/10.1016/j.celrep.2024.113990
Highlights
- CeADlk1 neurons are activated by nausea, visceral malaise, and bitter liquid, but not satiety
- CeADlk1 neurons suppress feeding under conditions of nausea
- Artificial activation of CeADlk1 neurons inhibits ongoing consummatory behavior
- CeADlk1 neuronal projections to the PBN mediate feeding suppression
Summary
The motivation to eat is suppressed by satiety and aversive stimuli such as nausea. The neural circuit mechanisms of appetite suppression by nausea are not well understood. Pkcδ neurons in the lateral subdivision of the central amygdala (CeA) suppress feeding in response to satiety signals and nausea. Here, we characterized neurons enriched in the medial subdivision (CeM) of the CeA marked by expression of Dlk1. CeADlk1 neurons are activated by nausea, but not satiety, and specifically suppress feeding induced by nausea. Artificial activation of CeADlk1 neurons suppresses drinking and social interactions, suggesting a broader function in attenuating motivational behavior. CeADlk1 neurons form projections to many brain regions and exert their anorexigenic activity by inhibition of neurons of the parabrachial nucleus. CeADlk1 neurons are inhibited by appetitive CeA neurons, but also receive long-range monosynaptic inputs from multiple brain regions. Our results illustrate a CeA circuit that regulates nausea-induced feeding suppression.