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GSK-3? activation is required for ZIP-induced disruption of learned fear.


ABSTRACT: The myristoylated zeta inhibitory peptide (ZIP), which was originally developed as a protein kinase C/M? (PKC?/PKM?) inhibitor, is known to produce the loss of different forms of memories. However, ZIP induces memory loss even in the absence of PKM?, and its mechanism of action, therefore, remains elusive. Here, through a kinome-wide screen, we found that glycogen synthase kinase 3 beta (GSK-3?) was robustly activated by ZIP in vitro. ZIP induced depotentiation (a cellular substrate of memory erasure) of conditioning-induced potentiation at LA synapses, and the ZIP-induced depotentiation was prevented by a GSK-3? inhibitor, 6-bromoindirubin-3-acetoxime (BIO-acetoxime). Consistently, GSK-3? inhibition by BIO-acetoxime infusion or GSK-3? knockdown by GSK-3? shRNA in the LA attenuated ZIP-induced disruption of learned fear. Furthermore, conditioned fear was decreased by expression of a non-inhibitable form of GSK-3? in the LA. Our findings suggest that GSK-3? activation is a critical step for ZIP-induced disruption of memory.

SUBMITTER: Song S 

PROVIDER: S-EPMC7588416 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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GSK-3β activation is required for ZIP-induced disruption of learned fear.

Song Sukwoon S   Kim Jihye J   Park Kyungjoon K   Lee Junghwa J   Park Sewon S   Lee Sukwon S   Kim Jeongyeon J   Hong Ingie I   Song Beomjong B   Choi Sukwoo S  

Scientific reports 20201026 1


The myristoylated zeta inhibitory peptide (ZIP), which was originally developed as a protein kinase C/Mζ (PKCζ/PKMζ) inhibitor, is known to produce the loss of different forms of memories. However, ZIP induces memory loss even in the absence of PKMζ, and its mechanism of action, therefore, remains elusive. Here, through a kinome-wide screen, we found that glycogen synthase kinase 3 beta (GSK-3β) was robustly activated by ZIP in vitro. ZIP induced depotentiation (a cellular substrate of memory er  ...[more]

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