PT  - JOURNAL ARTICLE
AU  - Feng, Hemin
AU  - Su, Junfeng
AU  - Fang, Wei
AU  - Chen, Xi
AU  - He, Jufang
TI  - The entorhinal cortex modulates trace fear memory formation and neuroplasticity in the lateral amygdala via cholecystokinin
AID  - 10.1101/2021.04.18.440346
DP  - 2021 Jan 01
TA  - bioRxiv
PG  - 2021.04.18.440346
4099  - http://biorxiv.org/content/early/2021/04/18/2021.04.18.440346.short
4100  - http://biorxiv.org/content/early/2021/04/18/2021.04.18.440346.full
AB  - Although the neural circuitry underlying fear memory formation is important in fear-related mental disorders, it is incompletely understood. Here, we utilized trace fear conditioning to study the formation of trace fear memory. We identified the entorhinal cortex (EC) as a critical component of sensory signaling to the amygdala. Moreover, we used the loss of function and rescue experiments to demonstrate that release of the neuropeptide cholecystokinin (CCK) from the EC is required for trace fear memory formation. We discovered that CCK-positive neurons extend from the EC to the lateral nuclei of the amygdala (LA), and inhibition of CCK-dependent signaling in the EC prevented long-term potentiation of sensory signals to the LA and formation of trace fear memory. Altogether, we suggest a model where sensory stimuli trigger the release of CCK from EC neurons, which potentiates sensory signals to the LA, ultimately influencing neural plasticity and trace fear memory formation.Competing Interest StatementThe authors have declared no competing interest.