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- W2159663149 abstract "While deregulation of cyclin-dependent kinase 5 (Cdk5) has been implicated in neurodegenerative diseases, its precise role in synaptic plasticity and memory remains elusive. Proteolytic cleavage of p35, a regulatory subunit of Cdk5, by calpain results in the generation of the truncated p25 protein, which causes hyperactivation of Cdk5. Using region-specific and inducible transgenic mice, we show that transiently increased p25 expression in the hippocampus enhanced long-term potentiation (LTP) and facilitated hippocampus-dependent memory. Moreover, p25 expression increased the number of dendritic spines and synapses. Importantly, enhanced memory achieved by a transient expression of p25 followed by its repression did not cause neurodegeneration. In contrast, prolonged p25 production caused severe cognitive deficits, which were accompanied by synaptic and neuronal loss and impaired LTP. Our data suggest a role for p25 in synaptic plasticity, synaptogenesis, learning, and memory and provide a model whereby deregulation of a plasticity factor can contribute to neurodegeneration." @default.
- W2159663149 created "2016-06-24" @default.
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- W2159663149 date "2005-12-01" @default.
- W2159663149 modified "2023-10-16" @default.
- W2159663149 title "Opposing Roles of Transient and Prolonged Expression of p25 in Synaptic Plasticity and Hippocampus-Dependent Memory" @default.
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- W2159663149 doi "https://doi.org/10.1016/j.neuron.2005.10.033" @default.
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