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- W1917963754 abstract "cGMP-dependent protein kinase I (cGKI) is expressed in the hippocampus, but its role in hippocampal long-term potentiation (LTP) is controversial. In addition, whether cGKI is involved in spatial learning has not been investigated. To address these issues, we generated mice with a hippocampus-specific deletion of cGKI (cGKI hko mice). Unlike conventional cGKI knock-out mice, cGKI hko mice lack gastrointestinal and cardiovascular phenotypes and have a normal life expectancy, which enables us to analyze hippocampal synaptic plasticity and learning in young and adult animals. Hippocampal LTP after repetitive episodes of theta burst stimulation was impaired in adult (12–14 weeks of age) but not in juvenile (3–4 weeks of age) cGKI hko mice. The difference in LTP between adult control and cGKI hko mice was abolished by the protein synthesis inhibitor anisomycin, suggesting that the impairment of LTP in adult cGKI hko mice reflects a defect in late-phase LTP. Despite their deficit in LTP, adult cGKI hko mutants showed normal performance in a discriminatory water maze and had intact contextual fear conditioning. These results suggest that hippocampal cGKI supports an age- and protein synthesis-dependent form of hippocampal LTP, whereas it is dispensable for hippocampus-dependent spatial reference and contextual memory." @default.
- W1917963754 created "2016-06-24" @default.
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- W1917963754 date "2003-07-09" @default.
- W1917963754 modified "2023-10-17" @default.
- W1917963754 title "Hippocampal cGMP-Dependent Protein Kinase I Supports an Age- and Protein Synthesis-Dependent Component of Long-Term Potentiation But Is Not Essential for Spatial Reference and Contextual Memory" @default.
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- W1917963754 doi "https://doi.org/10.1523/jneurosci.23-14-06005.2003" @default.
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