Dorsolateral septum somatostatin interneurons gate mobility to calibrate context-specific behavioral fear responses.
Adaptation, Psychological
/ physiology
Animals
Anxiety
/ physiopathology
CA3 Region, Hippocampal
/ physiology
Conditioning, Classical
Dentate Gyrus
/ physiology
Discrimination, Psychological
/ physiology
Fear
/ physiology
Freezing Reaction, Cataleptic
Interneurons
/ metabolism
Male
Mice
Neural Pathways
/ physiology
Optogenetics
Septal Nuclei
/ metabolism
Somatostatin
/ metabolism
Journal
Nature neuroscience
ISSN: 1546-1726
Titre abrégé: Nat Neurosci
Pays: United States
ID NLM: 9809671
Informations de publication
Date de publication:
03 2019
03 2019
Historique:
received:
22
08
2017
accepted:
17
12
2018
pubmed:
6
2
2019
medline:
22
5
2019
entrez:
6
2
2019
Statut:
ppublish
Résumé
Adaptive fear responses to external threats rely upon efficient relay of computations underlying contextual encoding to subcortical circuits. Brain-wide analysis of highly coactivated ensembles following contextual fear discrimination identified the dorsolateral septum (DLS) as a relay of the dentate gyrus-CA3 circuit. Retrograde monosynaptic tracing and electrophysiological whole-cell recordings demonstrated that DLS somatostatin-expressing interneurons (SST-INs) receive direct CA3 inputs. Longitudinal in vivo calcium imaging of DLS SST-INs in awake, behaving mice identified a stable population of footshock-responsive SST-INs during contextual conditioning whose activity tracked and predicted non-freezing epochs during subsequent recall in the training context but not in a similar, neutral context or open field. Optogenetic attenuation or stimulation of DLS SST-INs bidirectionally modulated conditioned fear responses and recruited proximal and distal subcortical targets. Together, these observations suggest a role for a potentially hard-wired DLS SST-IN subpopulation as arbiters of mobility that calibrate context-appropriate behavioral fear responses.
Identifiants
pubmed: 30718902
doi: 10.1038/s41593-018-0330-y
pii: 10.1038/s41593-018-0330-y
pmc: PMC6387640
mid: NIHMS1516898
doi:
Substances chimiques
Somatostatin
51110-01-1
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
436-446Subventions
Organisme : NIMH NIH HHS
ID : R01 MH104175
Pays : United States
Organisme : NIMH NIH HHS
ID : R01 MH111729
Pays : United States
Organisme : NIA NIH HHS
ID : RF1 AG048908
Pays : United States
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