ArticleFrontiers in synaptic neuroscience2025
PKMζ drives spatial memory reconsolidation but not maintenance.
Article in Frontiers in synaptic neuroscience, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Non-reinforced reactivation destabilizes spatial memory in the Morris water maze (MWM), triggering reconsolidation, a protein synthesis-dependent process that restabilizes reactivated memories. PKMζ is a constitutively active, atypical PKC isoform implicated in memory storage. However, the potential involvement of this kinase in spatial memory reconsolidation remains unexplored. We found that intra-dorsal CA1 infusion of the PKMζ inhibitor myristoylated ζ-inhibitory peptide (ZIP), but not its inactive scrambled analog scZIP, following non-reinforced spatial memory reactivation in the MWM, induced time-dependent, long-lasting amnesia in adult male Wistar rats. This effect was replicated by silencing PKMζ mRNA translation with phosphorothioated antisense oligonucleotides, but not by inhibiting the related PKCι/
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