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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2007-10-3
pubmed:abstractText
Tramadol, which inhibits the reuptake of noradrenaline and serotonin, is effective in animal models of depression. Its antidepressant-like effects may be mediated mainly by the noradrenergic system. This study investigated the role of the noradrenergic system in the antidepressant-like effects of tramadol and desipramine in the unpredictable chronic mild stress model. We assessed the involvement of beta-adrenoreceptors, particularly beta2-receptors in the activity of these drugs. In addition, we measured the level of noradrenaline and its metabolite 3-methoxy-4-hydroxy-phenylglycol (MHPG) in the locus coeruleus, hypothalamus, hippocampus and cerebellum in stressed mice. Unpredictable chronic mild stress induced a degradation of coat state and decreased grooming behaviour in the splash test, which was reversed by the chronic administration of tramadol (20 mg/kg) and desipramine (10 mg/kg). The nonselective beta-adrenoreceptor antagonist propranolol (5 mg/kg, intraperitoneally) and the selective beta2-receptor antagonist ICI 118,551 (2 mg/kg, intraperitoneally) reversed the antidepressant-like effects of tramadol and desipramine. Moreover, chronic tramadol and desipramine treatment increased the level of noradrenaline (NA) and MHPG in the locus coeruleus but not in the cerebellum, whereas only MHPG level was increased in the hypothalamus. Tramadol, however, increased the levels of MHPG and NA in the hippocampus, whereas desipramine only increased NA level. These data support the view that the noradrenergic system plays an important role in the antidepressant-like action of tramadol.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0955-8810
pubmed:author
pubmed:issnType
Print
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
623-31
pubmed:dateRevised
2009-7-7
pubmed:meshHeading
pubmed-meshheading:17912046-Adrenergic beta-Antagonists, pubmed-meshheading:17912046-Animals, pubmed-meshheading:17912046-Antidepressive Agents, pubmed-meshheading:17912046-Behavior, Animal, pubmed-meshheading:17912046-Cerebellum, pubmed-meshheading:17912046-Chronic Disease, pubmed-meshheading:17912046-Desipramine, pubmed-meshheading:17912046-Hippocampus, pubmed-meshheading:17912046-Hypothalamus, pubmed-meshheading:17912046-Locus Coeruleus, pubmed-meshheading:17912046-Male, pubmed-meshheading:17912046-Methoxyhydroxyphenylglycol, pubmed-meshheading:17912046-Mice, pubmed-meshheading:17912046-Mice, Inbred BALB C, pubmed-meshheading:17912046-Norepinephrine, pubmed-meshheading:17912046-Propanolamines, pubmed-meshheading:17912046-Propranolol, pubmed-meshheading:17912046-Receptors, Adrenergic, beta-2, pubmed-meshheading:17912046-Stress, Psychological, pubmed-meshheading:17912046-Tramadol
pubmed:year
2007
pubmed:articleTitle
Antidepressant-like effect of tramadol in the unpredictable chronic mild stress procedure: possible involvement of the noradrenergic system.
pubmed:affiliation
EA 3248 Psychobiology of Emotions, Faculty of Science and Technics, Parc Grandmont, University François Rabelais Tours, France.
pubmed:publicationType
Journal Article