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• W1504431166 abstract "Striatal-enriched protein tyrosine phosphatase (STEP) is a brain-specific phosphatase that opposes synaptic strengthening by the regulation of key synaptic signaling proteins. Previous studies suggest a possible role for STEP in learning and memory. To demonstrate the functional importance of STEP in learning and memory, we generated STEP knockout (KO) mice and examined the effect of deletion of STEP on behavioral performance, as well as the phosphorylation and expression of its substrates. Here we report that loss of STEP leads to significantly enhanced performance in hippocampal-dependent learning and memory tasks. In addition, STEP KO mice displayed greater dominance behavior, although they were normal in their motivation, motor coordination, visual acuity and social interactions. STEP KO mice displayed enhanced tyrosine phosphorylation of extracellular-signal regulated kinase 1/2 (ERK1/2), the NR2B subunit of the N-methyl-D-aspartate receptor (NMDAR) and proline-rich tyrosine kinase (Pyk2), as well as an increased phosphorylation of ERK1/2 substrates. Concomitant with the increased phosphorylation of NR2B, synaptosomal expression of NR1/NR2B NMDARs was increased in STEP KO mice, as was the GluR1/GluR2 containing α-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid receptors (AMPARs), providing a potential molecular mechanism for the improved cognitive performance. The data support a role for STEP in the regulation of synaptic strengthening. The absence of STEP improves cognitive performance, and may do so by the regulation of downstream effectors necessary for synaptic transmission." @default.
• W1504431166 created "2016-06-24" @default.
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• W1504431166 date "2011-04-19" @default.
• W1504431166 modified "2023-09-25" @default.
• W1504431166 title "Striatal-enriched protein tyrosine phosphatase (STEP) knockout mice have enhanced hippocampal memory" @default.
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• W1504431166 doi "https://doi.org/10.1111/j.1460-9568.2011.07687.x" @default.
• W1504431166 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3118976" @default.
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