ePoster

Possible interaction between noradrenergic transmission in the basolateral amygdala and dopaminergic transmission in the hippocampus in the modulation of initial memory consolidation

Bogomil Peshev, Petya Ivanova, Desislava Krushovlieva, Lidia Kortenska, Nikolai Lazarov, Pavel Rashev, Dimitrinka Atanasova, Jana Tchekalarova
FENS Forum 2024(2024)
Messe Wien Exhibition & Congress Center, Vienna, Austria

Conference

FENS Forum 2024

Messe Wien Exhibition & Congress Center, Vienna, Austria

Resources

Authors & Affiliations

Bogomil Peshev, Petya Ivanova, Desislava Krushovlieva, Lidia Kortenska, Nikolai Lazarov, Pavel Rashev, Dimitrinka Atanasova, Jana Tchekalarova

Abstract

It has been demonstrated that noradrenergic activation of the basolateral amygdala (BLA) enhances the initial consolidation of memories in the hippocampus and upregulates the levels of activity-regulated cytoskeleton-associated protein (Arc) - a molecular marker of memory-related changes in neuronal activity. However, by releasing both noradrenaline and dopamine in the hippocampus, the locus coeruleus could also influence the dynamics of memory consolidation. We set out to investigate the possible interaction between noradrenergic transmission in the BLA and dopaminergic transmission in the hippocampus in the modulation of memory consolidation. In the two experiments that we conducted, Wistar rats were divided into three groups according to the pharmacological treatment they received in the BLA: vehicle, clenbuterol (a beta-2 adrenergic receptor agonist) or a systemic injection of the D1/D5 receptors antagonist SCH 23390 followed by the infusion of clenbuterol in the BLA. In our first experiment, the animals were subjected to the pharmacological procedures immediately after completing the sample phase of the object-location task. They were sacrificed 1h later. The second experiment followed the same paradigm, but the animals from the three groups were subjected to a test session 24h later and sacrificed 30 minutes after it. The collected brain tissue was used for western blot and immunohistochemical analysis of Arc availability and distribution in the hippocampus. The results obtained suggest that the potential enhancement of initial memory consolidation by the noradrenergic activation of BLA involves still unexplored interplay with the dopaminergic system within the hippocampus.

Unique ID: fens-24/possible-interaction-between-noradrenergic-f581f235