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• W2129907658 abstract "Guanine nucleotide exchange factors (GEFs) activate small GTPases that are involved in several cellular functions. cAMP-guanine nucleotide exchange factor II (cAMP-GEF II) acts as a target for cAMP independently of protein kinase A (PKA) and functions as a GEF for Rap1 and Rap2. Although cAMP-GEF II is expressed abundantly in several brain areas including the cortex, striatum, and hippocampus, its specific function and possible role in hippocampal synaptic plasticity and cognitive processes remain elusive. Here, we investigated how cAMP-GEF II affects synaptic function and animal behavior using cAMP-GEF II knockout mice. We found that deletion of cAMP-GEF II induced moderate decrease in long-term potentiation, although this decrease was not statistically significant. On the other hand, it produced a significant and clear impairment in NMDA receptor-dependent long-term depression at the Schaffer collateral-CA1 synapses of hippocampus, while microscopic morphology, basal synaptic transmission, and depotentiation were normal. Behavioral testing using the Morris water maze and automated IntelliCage system showed that cAMP-GEF II deficient mice had moderately reduced behavioral flexibility in spatial learning and memory. We concluded that cAMP-GEF II plays a key role in hippocampal functions including behavioral flexibility in reversal learning and in mechanisms underlying induction of long-term depression." @default.
• W2129907658 created "2016-06-24" @default.
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• W2129907658 date "2015-06-24" @default.
• W2129907658 modified "2023-09-28" @default.
• W2129907658 title "Involvement of cAMP-guanine nucleotide exchange factor II in hippocampal long-term depression and behavioral flexibility" @default.
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• W2129907658 doi "https://doi.org/10.1186/s13041-015-0130-1" @default.
• W2129907658 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4477293" @default.
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