Publication Date:
2010-11-12
Description:
The role of different amygdala nuclei (neuroanatomical subdivisions) in processing Pavlovian conditioned fear has been studied extensively, but the function of the heterogeneous neuronal subtypes within these nuclei remains poorly understood. Here we use molecular genetic approaches to map the functional connectivity of a subpopulation of GABA-containing neurons, located in the lateral subdivision of the central amygdala (CEl), which express protein kinase C-delta (PKC-delta). Channelrhodopsin-2-assisted circuit mapping in amygdala slices and cell-specific viral tracing indicate that PKC-delta(+) neurons inhibit output neurons in the medial central amygdala (CEm), and also make reciprocal inhibitory synapses with PKC-delta(-) neurons in CEl. Electrical silencing of PKC-delta(+) neurons in vivo suggests that they correspond to physiologically identified units that are inhibited by the conditioned stimulus, called CEl(off) units. This correspondence, together with behavioural data, defines an inhibitory microcircuit in CEl that gates CEm output to control the level of conditioned freezing.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3597095/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3597095/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haubensak, Wulf -- Kunwar, Prabhat S -- Cai, Haijiang -- Ciocchi, Stephane -- Wall, Nicholas R -- Ponnusamy, Ravikumar -- Biag, Jonathan -- Dong, Hong-Wei -- Deisseroth, Karl -- Callaway, Edward M -- Fanselow, Michael S -- Luthi, Andreas -- Anderson, David J -- 1 R01 MH085082-01A1/MH/NIMH NIH HHS/ -- R01 MH063912/MH/NIMH NIH HHS/ -- R01 MH063912-09/MH/NIMH NIH HHS/ -- R01 MH063912-09S1/MH/NIMH NIH HHS/ -- R01 MH063912-10/MH/NIMH NIH HHS/ -- R01 MH085082/MH/NIMH NIH HHS/ -- R01 MH085082-01A1/MH/NIMH NIH HHS/ -- RC2 NS069464/NS/NINDS NIH HHS/ -- RC2 NS069464-01/NS/NINDS NIH HHS/ -- RC2 NS069464-02/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 Nov 11;468(7321):270-6. doi: 10.1038/nature09553.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology 216-76, California Institute of Technology, Pasadena, California 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21068836" target="_blank"〉PubMed〈/a〉
Keywords:
Amygdala/anatomy & histology/cytology/enzymology/*physiology
;
Animals
;
Axonal Transport
;
Cells, Cultured
;
Conditioning, Classical/*physiology
;
Fear/*physiology
;
Female
;
Freezing Reaction, Cataleptic
;
Genetic Techniques
;
Humans
;
Male
;
Mice
;
Mice, Transgenic
;
Neural Inhibition/*physiology
;
Neural Pathways/cytology/enzymology/*physiology
;
Neurons/enzymology/metabolism
;
Protein Kinase C-delta/deficiency/genetics/metabolism
;
Synapses/metabolism
;
gamma-Aminobutyric Acid/metabolism
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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