Essential role for TRPC5 in amygdala function and fear-related behavior.
Essential role for TRPC5 in amygdala function and fear-related behavior.
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DOI:
10.1016/j.cell.2009.03.039
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发表时间:
2009-05-15
期刊:
影响因子:
64.5
通讯作者:
Clapham DE
中科院分区:
文献类型:
--
作者:
Riccio A;Li Y;Moon J;Kim KS;Smith KS;Rudolph U;Gapon S;Yao GL;Tsvetkov E;Rodig SJ;Van't Veer A;Meloni EG;Carlezon WA Jr;Bolshakov VY;Clapham DE
The transient receptor potential channel 5 (TRPC5) is predominantly expressed in the brain where it can form heterotetrameric complexes with TRPC1 and TRPC4 channel subunits. These excitatory, non-selective cationic channels are regulated by G protein, phospholipase C-coupled receptors. Here, we show that TRPC5−/− mice exhibit diminished innate fear levels in response to innately aversive stimuli. Moreover, mutant mice exhibited significant reductions in responses mediated by synaptic activation of Group I metabotropic glutamate and cholecystokinin 2 receptors in neurons of the amygdala. Synaptic strength at afferent inputs to the amygdala was diminished in P10–P13 null mice. In contrast, baseline synaptic transmission, membrane excitability, and spike timing-dependent long-term potentiation at cortical and thalamic inputs to the amygdala were largely normal in older null mice. These experiments provide genetic evidence that TRPC5, activated via G protein-coupled neuronal receptors, has an essential function in innate fear.
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