2024-03-21 アリゾナ大学
<関連情報>
- https://news.arizona.edu/story/uarizona-scientists-pinpoint-anorexias-neurologic-origins
- https://www.cell.com/cell-reports/fulltext/S2211-1247(24)00261-4
活動に基づく食欲不振の発症には、2つの中枢拡張扁桃体核におけるPKC-δニューロンが必要である Development of activity-based anorexia requires PKC-δ neurons in two central extended amygdala nuclei
Wesley Ilana Schnapp,JungMin Kim,Yong Wang,Sayujya Timilsena,Caohui Fang,Haijiang Cai
Cell Reports Published:March 08, 2024
DOI:https://doi.org/10.1016/j.celrep.2024.113933
Highlights
•Amygdala PKC-δ neurons contribute to both feeding and activity phenotypes of ABA
•Activity of PKC-δ neurons in both amygdala nuclei is increased after ABA development
•Food intake is suppressed when one nucleus is activated while the other is silenced
•Amygdala PKC-δ neurons are involved in the sexual divergence of ABA
Summary
Anorexia nervosa (AN) is a serious psychiatric disease, but the neural mechanisms underlying its development are unclear. A subpopulation of amygdala neurons, marked by expression of protein kinase C-delta (PKC-δ), has previously been shown to regulate diverse anorexigenic signals. Here, we demonstrate that these neurons regulate development of activity-based anorexia (ABA), a common animal model for AN. PKC-δ neurons are located in two nuclei of the central extended amygdala (EAc): the central nucleus (CeA) and oval region of the bed nucleus of the stria terminalis (ovBNST). Simultaneous ablation of CeAPKC-δ and ovBNSTPKC-δ neurons prevents ABA, but ablating PKC-δ neurons in the CeA or ovBNST alone is not sufficient. Correspondingly, PKC-δ neurons in both nuclei show increased activity with ABA development. Our study shows how neurons in the amygdala regulate ABA by impacting both feeding and wheel activity behaviors and support a complex heterogeneous etiology of AN.