| Binge cocaine administration in adolescent rats affects amygdalar gene expression patterns and alters anxiety-related behavior in adulthood. | |
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MedLine Citation:
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PMID: 21571252 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Administration of cocaine during adolescence alters neurotransmission and behavioral sensitization in adulthood, but the effect on the acquisition of fear memories and the development of emotion-based neuronal circuits is unknown. METHODS: We examined fear learning and anxiety-related behaviors in adult male rats that were subjected to binge cocaine treatment during adolescence. We furthermore conducted gene expression analyses of the amygdala 22 hours after the last cocaine injection to identify molecular patterns that might lead to altered emotional processing. RESULTS: Rats injected with cocaine during adolescence displayed less anxiety in adulthood than their vehicle-injected counterparts. In addition, cocaine-exposed animals were deficient in their ability to develop contextual fear responses. Cocaine administration caused transient gene expression changes in the Wnt signaling pathway, of axon guidance molecules, and of synaptic proteins, suggesting that cocaine perturbs dendritic structures and synapses in the amygdala. Phosphorylation of glycogen synthase kinase 3 beta, a kinase in the Wnt signaling pathway, was altered immediately following the binge cocaine paradigm and returned to normal levels 22 hours after the last cocaine injection. CONCLUSIONS: Cocaine exposure during adolescence leads to molecular changes in the amygdala and decreases fear learning and anxiety in adulthood. |
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Authors:
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Stephanie E Sillivan; Yolanda D Black; Alipi V Naydenov; Fair R Vassoler; Ryan P Hanlin; Christine Konradi |
Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2011-05-14 |
Journal Detail:
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Title: Biological psychiatry Volume: 70 ISSN: 1873-2402 ISO Abbreviation: Biol. Psychiatry Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-08-25 Completed Date: 2012-01-09 Revised Date: 2012-09-28 |
Medline Journal Info:
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Nlm Unique ID: 0213264 Medline TA: Biol Psychiatry Country: United States |
Other Details:
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Languages: eng Pagination: 583-92 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Society of Biological Psychiatry. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Neuroscience Graduate Program, Vanderbilt University, Nashville, Tennessee, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Age Factors Amygdala / metabolism* Animals Anxiety / drug therapy* Cocaine / poisoning* Disease Models, Animal Fear / drug effects* Gene Expression / drug effects* Glycogen Synthase Kinase 3 / metabolism Learning / drug effects Male Rats Rats, Sprague-Dawley Wnt Signaling Pathway / drug effects* |
| Grant Support | |
ID/Acronym/Agency:
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DA19152/DA/NIDA NIH HHS; R21 DA019152-01/DA/NIDA NIH HHS; T32MH064913/MH/NIMH NIH HHS |
| Chemical | |
Reg. No./Substance:
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50-36-2/Cocaine; EC 2.7.11.1/glycogen synthase kinase 3 beta; EC 2.7.11.26/Glycogen Synthase Kinase 3 |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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