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- W2016994512 abstract "Activity-dependent regulation of synaptic efficacy is believed to underlie learning and memory formation. Here we show that protein degradation by the proteasome is required for the induction of the protein synthesis-dependent late-phase of long-term potentiation (late-LTP) but not for its maintenance. Proteasome activity was also key to the polarity of heterosynaptic interactions between synapses expressing synaptic plasticity and newly activated synapses. In fact, proteasome activity was required for the consolidation of an otherwise transient potentiation (early-LTP) into late-LTP by strong tetanization of a separate afferent pathway both in the weak-before-strong and in the strong-before-weak two-pathway paradigms [Frey and Morris (1997) Nature 385:533-536; Frey and Morris (1998) Neuropharmacology 37:545-552], suggesting that proteasome activity plays a role in the synaptic tagging and capture of plasticity-related proteins at stimulated synapses. Additionally, proteasome inhibition abrogated immunity against heterosynaptic depotentiation of an established late-LTP when applied during weak tetanic stimulation in the strong-before-weak two-pathway paradigm. Such a heterosynaptic destabilizing effect of proteasome inhibition was abolished by concomitant inhibition of N-methyl-d-aspartate (NMDA) receptors, suggesting that it is an active process. Together, these results indicate that the proteasome plays important roles in the establishment of late-LTP and in the preservation of potentiated synapses when a subsequent synaptic plasticity is induced within the same neuronal population." @default.
- W2016994512 created "2016-06-24" @default.
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- W2016994512 date "2010-09-01" @default.
- W2016994512 modified "2023-10-14" @default.
- W2016994512 title "Protein degradation by the proteasome is required for synaptic tagging and the heterosynaptic stabilization of hippocampal late-phase long-term potentiation" @default.
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- W2016994512 doi "https://doi.org/10.1016/j.neuroscience.2010.06.032" @default.
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