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

Sukwoon Song, Jihye Kim, Kyungjoon Park, Junghwa Lee, Sewon Park, Sukwon Lee, Jeongyeon Kim, Ingie Hong, Beomjong Song, Sukwoo Choi

Research output: Contribution to journalArticlepeer-review


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 erasure) of conditioning-induced potentiation at LA synapses, and the ZIP-induced depotentiation was prevented by a GSK-3β inhibitor, 6-bromoindirubin-3-acetoxime (BIO-acetoxime). Consistently, GSK-3β inhibition by BIO-acetoxime infusion or GSK-3β knockdown by GSK-3β 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-3β in the LA. Our findings suggest that GSK-3β activation is a critical step for ZIP-induced disruption of memory.

Original languageEnglish (US)
Article number18227
JournalScientific reports
Issue number1
StatePublished - Dec 1 2020

ASJC Scopus subject areas

  • General


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