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  • 1
    Publication Date: 1998-12-18
    Description: Cocaine regulates the transcription factor CREB (adenosine 3', 5'-monophosphate response element binding protein) in rat nucleus accumbens, a brain region that is important for addiction. Overexpression of CREB in this region decreases the rewarding effects of cocaine and makes low doses of the drug aversive. Conversely, overexpression of a dominant-negative mutant CREB increases the rewarding effects of cocaine. Altered transcription of dynorphin likely contributes to these effects: Its expression is increased by overexpression of CREB and decreased by overexpression of mutant CREB. Moreover, blockade of kappa opioid receptors (on which dynorphin acts) antagonizes the negative effect of CREB on cocaine reward. These results identify an intracellular cascade-culminating in gene expression-through which exposure to cocaine modifies subsequent responsiveness to the drug.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carlezon, W A Jr -- Thome, J -- Olson, V G -- Lane-Ladd, S B -- Brodkin, E S -- Hiroi, N -- Duman, R S -- Neve, R L -- Nestler, E J -- New York, N.Y. -- Science. 1998 Dec 18;282(5397):2272-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Psychiatry, Center for Genes and Behavior, Yale University School of Medicine and Connecticut Mental Health Center, New Haven, CT 06508, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9856954" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cocaine/administration & dosage/*pharmacology ; Conditioning (Psychology) ; Cyclic AMP Response Element-Binding Protein/genetics/*metabolism ; Dose-Response Relationship, Drug ; Dynorphins/genetics/metabolism ; Gene Expression ; Gene Expression Regulation ; Gene Transfer Techniques ; Genetic Vectors ; Naltrexone/analogs & derivatives/pharmacology ; Narcotic Antagonists/pharmacology ; Neurons/metabolism ; Nucleus Accumbens/*metabolism ; Point Mutation ; RNA, Messenger/genetics/metabolism ; Rats ; Receptors, Opioid, kappa/antagonists & inhibitors/metabolism ; *Reward ; Simplexvirus/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2006-02-18
    Description: Norepinephrine (NE) is widely implicated in opiate withdrawal, but much less is known about its role in opiate-induced locomotion and reward. In mice lacking dopamine beta-hydroxylase (DBH), an enzyme critical for NE synthesis, we found that NE was necessary for morphine-induced conditioned place preference (CPP; a measure of reward) and locomotion. These deficits were rescued by systemic NE restoration. Viral restoration of DBH expression in the nucleus tractus solitarius, but not in the locus coeruleus, restored CPP for morphine. Morphine-induced locomotion was partially restored by DBH expression in either brain region. These data suggest that NE signaling by the nucleus tractus solitarius is necessary for morphine reward.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Olson, Valerie G -- Heusner, Carrie L -- Bland, Ross J -- During, Matthew J -- Weinshenker, David -- Palmiter, Richard D -- New York, N.Y. -- Science. 2006 Feb 17;311(5763):1017-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16484499" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal/drug effects ; Conditioning (Psychology) ; Dopamine beta-Hydroxylase/genetics/metabolism ; Droxidopa/pharmacology ; Locomotion/drug effects ; Locus Coeruleus/physiology ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Morphine/*pharmacology ; Motor Activity/drug effects ; Norepinephrine/*physiology ; *Reward ; Signal Transduction ; Solitary Nucleus/*physiology ; *Synaptic Transmission
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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