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Tytuł pozycji:

Noradrenergic actions in the basolateral complex of the amygdala modulate Arc expression in hippocampal synapses and consolidation of aversive and non-aversive memory.

Tytuł:
Noradrenergic actions in the basolateral complex of the amygdala modulate Arc expression in hippocampal synapses and consolidation of aversive and non-aversive memory.
Autorzy:
McReynolds JR; Department of Biomedical Sciences, Marquette University, Milwaukee, WI 53201-1881, United States.
Anderson KM; Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9004, United States.
Donowho KM; School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson, TX 75080-3021, United States.
McIntyre CK; School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson, TX 75080-3021, United States. Electronic address: .
Źródło:
Neurobiology of learning and memory [Neurobiol Learn Mem] 2014 Nov; Vol. 115, pp. 49-57. Date of Electronic Publication: 2014 Sep 06.
Typ publikacji:
Journal Article; Research Support, Non-U.S. Gov't
Język:
English
Imprint Name(s):
Original Publication: San Diego, Calif. : Academic Press, c1995-
MeSH Terms:
Adrenergic Neurons/*physiology
Basolateral Nuclear Complex/*physiology
Cytoskeletal Proteins/*physiology
Hippocampus/*physiology
Memory/*physiology
Nerve Tissue Proteins/*physiology
Adrenergic Neurons/drug effects ; Adrenergic beta-Agonists/pharmacology ; Animals ; Clenbuterol/pharmacology ; Cytoskeletal Proteins/biosynthesis ; Gene Expression Regulation/physiology ; Hippocampus/metabolism ; Male ; Nerve Tissue Proteins/biosynthesis ; Rats ; Rats, Sprague-Dawley ; Synapses/metabolism ; Synapses/physiology
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Grant Information:
R15 MH099655 United States MH NIMH NIH HHS; R43 MH086960 United States MH NIMH NIH HHS
Contributed Indexing:
Keywords: Aversive learning; BLA; Dorsal hippocampus; Emotional arousal; Norepinephrine; Object recognition
Substance Nomenclature:
0 (Adrenergic beta-Agonists)
0 (Cytoskeletal Proteins)
0 (Nerve Tissue Proteins)
0 (activity regulated cytoskeletal-associated protein)
XTZ6AXU7KN (Clenbuterol)
Entry Date(s):
Date Created: 20140909 Date Completed: 20150804 Latest Revision: 20211021
Update Code:
20240104
PubMed Central ID:
PMC4250290
DOI:
10.1016/j.nlm.2014.08.016
PMID:
25196704
Czasopismo naukowe
The basolateral complex of the amygdala (BLA) plays a role in the modulation of emotional memory consolidation through its interactions with other brain regions. In rats, memory enhancing infusions of the β-adrenergic receptor agonist clenbuterol into the BLA immediately after training enhances expression of the protein product of the immediate early gene Arc in the dorsal hippocampus and memory-impairing intra-BLA treatments reduce hippocampal Arc expression. We have proposed that the BLA may modulate memory consolidation through an influence on the local translation of synaptic plasticity proteins, like Arc, in recently active synapses in efferent brain regions. To date, all work related to this hypothesis is based on aversive memory tasks such as inhibitory avoidance (IA). To determine whether BLA modulation of hippocampal Arc protein expression is specific to plasticity associated with inhibitory avoidance memory, or a common mechanism for multiple types of memory, we tested the effect of intra-BLA infusions of clenbuterol on memory and hippocampal synaptic Arc expression following IA or object recognition training. Results indicate that intra-BLA infusions of clenbuterol enhance memory for both tasks; however, Arc expression in hippocampal synaptoneurosomes was significantly elevated only in rats trained on the aversive IA task. These findings suggest that regulation of Arc expression in hippocampal synapses may depend on co-activation of arousal systems. To test this hypothesis, a "high arousal" version of the OR task was used where rats were not habituated to the testing conditions. Posttraining intra-BLA infusions of clenbuterol enhanced consolidation of the high-arousing version of the task and significantly increased Arc protein levels in dorsal hippocampus synaptic fractions. These findings suggest that the BLA modulates multiple forms of memory and affects the synaptic plasticity-associated protein Arc in synapses of the dorsal hippocampus when emotional arousal is elevated.
(Copyright © 2014 Elsevier Inc. All rights reserved.)

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