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Humeau, Yann; Reisel, Daniel; Johnson, Alexander W.; Borchardt, Thilo; Jensen, Vidar; Gebhardt, Christine; Bosch, Verena; Gass, Peter; Bannerman, David M.; Good, Mark Andrew; Hvalby, Øivind; Sprengel, Rolf; Luthi, Andreas (2007)
Publisher: Society for Neuroscience
Languages: English
Types: Article
Subjects:

Classified by OpenAIRE into

mesheuropmc: musculoskeletal, neural, and ocular physiology, psychological phenomena and processes, nervous system, mental disorders
The AMPA receptor subunit glutamate receptor 1 (GluR1 or GluR-A) contributes to amygdala-dependent emotional learning. It remains\ud unclear, however, to what extent different amygdala pathways depend on GluR1, or other AMPA receptor subunits, for proper synaptic\ud transmission and plasticity, and whether GluR1-dependent long-term potentiation (LTP) is necessary for auditory and contextual fear\ud conditioning. Here, we dissected the role of GluR1 and GluR3 (GluR-C) subunits in AMPA receptor-dependent amygdala LTP and fear\ud conditioning using knock-out mice (GluR1−/− and GluR3−/−). We found that, whereas LTP at thalamic inputs to lateral amygdala (LA)\ud projection neurons and at glutamatergic synapses in the basal amygdala was completely absent in GluR1−/− mice, both GluR1 and GluR3\ud contributed to LTP in the cortico-LA pathway. Because both auditory and contextual fear conditioning were selectively impaired in\ud GluR1−/− but not GluR3−/− mice, we conclude that GluR1-dependent synaptic plasticity is the dominant form of LTP underlying the\ud acquisition of auditory and contextual fear conditioning, and that plasticity in distinct amygdala pathways differentially contributes to\ud aversive conditioning.
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