A behavioral tagging account of kinase contribution to memory formation after spaced aversive training

Published: 24 July 2023| Version 1 | DOI: 10.17632/yrh5fs68r2.1


Long-term memory (LTM) can be induced by repeated spaced training trials. Using the weak inhibitory avoidance (wIA) task, we showed that one wIA session does not lead to a 24-h LTM, whereas two identical wIA sessions spaced by 15 min to 6 h induce a 24-h LTM. This LTM promotion depends both on hippocampal protein synthesis and the activity of several kinases. In agreement with the behavioral tagging (BT) hypothesis, our results suggest that the two training sessions induce transient learning tags and lead, via a cooperative effect, to the synthesis of plasticity-related proteins (PRPs) that become available and captured by the tag from the second session. Although ERKs1/2 are needed for PRPs synthesis and CaMKs are required for tag setting, PKA participates in both processes. We conclude that the BT mechanism accounts for the molecular constraints underlying the classic effect of spaced learning on LTM formation.


Steps to reproduce

See the STAR Methods steps in the iScience article at https://doi.org/10.1016/j.isci.2023.107278


Behavioral Neuroscience, Long-Term Memory


Agencia Nacional de Promoción Científica y Tecnológica

ANPCyT, PICT 2016-0172

Universidad de Buenos Aires

UBACyT 20020170100501BA