Document Type
Article
Publication Title
eLife
Abstract
Neurons of the basal forebrain nucleus basalis and posterior substantia innominata (NBM/SIp) comprise the major source of cholinergic input to the basolateral amygdala (BLA). Using a genetically-encoded acetylcholine (ACh) sensor in mice, we demonstrate that BLA-projecting cholinergic neurons can 'learn' the association between a naïve tone and a foot shock (training) and release ACh in the BLA in response to the conditioned tone 24h later (recall). In the NBM/SIp cholinergic neurons express the immediate early gene, Fos following both training and memory recall. Cholinergic neurons that express Fos following memory recall display increased intrinsic excitability. Chemogenetic silencing of these learning-activated cholinergic neurons prevents expression of the defensive behavior to the tone. In contrast, we show that NBM/SIp cholinergic neurons are not activated by an innately threatening stimulus (predator odor). Instead, VP/SIa cholinergic neurons are activated and contribute to defensive behaviors in response to predator odor, an innately threatening stimulus. Taken together, we find that distinct populations of cholinergic neurons are recruited to signal distinct aversive stimuli, demonstrating functionally refined organization of specific types of memory within the cholinergic basal forebrain of mice.
DOI
10.7554/eLife.86581
Publication Date
2-16-2024
Keywords
mouse, neuroscience
ISSN
2050-084X
Recommended Citation
Rajebhosale P, Ananth MR, Kim R, Crouse RB, Jiang L, López-Hernández GY, Zhong C, Arty C, Wang S, Jone A, Desai N, Li Y, Picciotto MR, Role LW, Talmage DA. Functionally Refined Encoding of Threat Memory by Distinct Populations of Basal Forebrain Cholinergic Projection Neurons. eLife. 2024; . doi: 10.7554/eLife.86581.
