Publication Date:
2003-11-25
Description:
Three distinct classes of drugs: dopaminergic agonists (such as D-amphetamine), serotonergic agonists (such as LSD), and glutamatergic antagonists (such as PCP) all induce psychotomimetic states in experimental animals that closely resemble schizophrenia symptoms in humans. Here we implicate a common signaling pathway in mediating these effects. In this pathway, dopamine- and an adenosine 3',5'-monophosphate (cAMP)-regulated phospho-protein of 32 kilodaltons (DARPP-32) is phosphorylated or dephosphorylated at three sites, in a pattern predicted to cause a synergistic inhibition of protein phosphatase-1 and concomitant regulation of its downstream effector proteins glycogen synthesis kinase-3 (GSK-3), cAMP response element-binding protein (CREB), and c-Fos. In mice with a genetic deletion of DARPP-32 or with point mutations in phosphorylation sites of DARPP-32, the effects of D-amphetamine, LSD, and PCP on two behavioral parameters-sensorimotor gating and repetitive movements-were strongly attenuated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Svenningsson, Per -- Tzavara, Eleni T -- Carruthers, Robert -- Rachleff, Ilan -- Wattler, Sigrid -- Nehls, Michael -- McKinzie, David L -- Fienberg, Allen A -- Nomikos, George G -- Greengard, Paul -- DA10044/DA/NIDA NIH HHS/ -- MH40899/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2003 Nov 21;302(5649):1412-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14631045" target="_blank"〉PubMed〈/a〉
Keywords:
1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine/pharmacology
;
Animals
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Brain/drug effects/*metabolism
;
Central Nervous System Agents/*pharmacology
;
Corpus Striatum/drug effects/metabolism
;
Cyclic AMP Response Element-Binding Protein/metabolism
;
Dextroamphetamine/pharmacology
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Dopamine/metabolism
;
Dopamine and cAMP-Regulated Phosphoprotein 32
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Frontal Lobe/drug effects/metabolism
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Genes, fos
;
Glycogen Synthase Kinase 3/metabolism
;
Lysergic Acid Diethylamide/pharmacology
;
Male
;
Mice
;
Mice, Knockout
;
Motor Activity/drug effects
;
Nerve Tissue Proteins/metabolism
;
Phencyclidine/pharmacology
;
Phosphoprotein Phosphatases/antagonists & inhibitors
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Phosphoproteins/*metabolism
;
Phosphorylation
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Protein Phosphatase 1
;
RNA, Messenger/genetics/metabolism
;
Receptors, Dopamine D1/genetics/metabolism
;
Reflex, Startle/drug effects
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*Signal Transduction
;
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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