Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6272745 | Neuroscience | 2015 | 11 Pages |
Abstract
Since the discovery that long-term memory is dependent on protein synthesis, several transcription factors have been found to participate in the transcriptional activity needed for its consolidation. Among them, NF-kappa B is a constitutive transcription factor whose nuclear activity has proven to be necessary for the consolidation of inhibitory avoidance in mice. This transcription factor has a wide distribution in the nervous system, with a well-reported presence in dendrites and synaptic terminals. Here we report changes in synaptosomal NF-kappa B localization and activity, during long-term memory consolidation. Activity comparison of synaptosomal and nuclear NF-kappa B, indicates different dynamics for both localizations. In this study we identify two pools of synaptosomal NF-kappa B, one obtained with the synaptoplasm (free fraction) and the second bound to the synaptosomal membranes. During the early steps of consolidation the first pool is activated, as the membrane associated transcription factor fraction increases and concomitantly the free fraction decreases. These results suggest that the activation of synaptic NF-kappa B and its translocation to membranes are part of the consolidation of long-term memory in mice.
Keywords
NLSPMSFPFARODSDSMAP-1DTTzif268HEPESSDSCCAAT-enhancer-binding proteinsSTAT3CREBNF-kappa B4-(2-hydroxyethyl)-1-piperazineethanesulfonic acidC/EBPElectrophoretic mobility shift assayEDTAEthylenediaminetetraacetic acidElk-1Memory consolidationanalysis of varianceANOVArelative optical densitylong-term potentiationLTPdithiothreitolsodium dodecyl sulfateEMSA یا electrophoretic mobility shift assay nuclear localization signalnuclear factor kappa-light-chain-enhancer of activated B cellsPhosphatephenylmethylsulfonyl fluoridesignal transducer and activator of transcription 3SynapseWestern blotsparaformaldehydeactivator protein 1cAMP response element-binding protein
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Authors
A. Salles, M. Boccia, M. Blake, N. Corbi, C. Passananti, C.M. Baratti, A. Romano, R. Freudenthal,