rdf:type |
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lifeskim:mentions |
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pubmed:issue |
10-11
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pubmed:dateCreated |
1992-8-18
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pubmed:abstractText |
The effects of different alpha-2 agonists on the spontaneous motility in naive and morphine tolerant mice were studied. Clonidine caused a reduction at the lower (1-3 micrograms Kg-1 i.p.) and higher (100 micrograms Kg-1 i.p.) doses and no effect at 10-30 micrograms Kg-1 i.p. in naive mice, while an increase was found at the intermediate doses (10-30 micrograms Kg-1 i.p.) in morphine tolerant mice. The clonidine-induced inhibition on spontaneous motility at the lower and higher doses was prevented both in naive and tolerant mice by idazoxan pretreatment. In morphine-treated animals the increase induced by clonidine was antagonized by prazosin. The action of guanabenz and guanfacine on locomotion differed from clonidine, by producing inhibition only at higher doses (100-300 micrograms Kg-1 i.p.). Clonidine, but not guanfacine or guanabenz, prevented the withdrawal syndrome precipitated by naloxone. Thus the only alpha-2 agonistic properties do not appear sufficient to explain the prevention of morphine abstinence by clonidine in mice, which can represent a single model to screen anti-withdrawal drugs.
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pubmed:language |
eng
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pubmed:journal |
|
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Adrenergic alpha-Agonists,
http://linkedlifedata.com/resource/pubmed/chemical/Clonidine,
http://linkedlifedata.com/resource/pubmed/chemical/Dioxanes,
http://linkedlifedata.com/resource/pubmed/chemical/Guanabenz,
http://linkedlifedata.com/resource/pubmed/chemical/Guanfacine,
http://linkedlifedata.com/resource/pubmed/chemical/Idazoxan,
http://linkedlifedata.com/resource/pubmed/chemical/Morphine,
http://linkedlifedata.com/resource/pubmed/chemical/Naloxone,
http://linkedlifedata.com/resource/pubmed/chemical/Prazosin,
http://linkedlifedata.com/resource/pubmed/chemical/Receptors, Adrenergic, alpha
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pubmed:status |
MEDLINE
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pubmed:issn |
0037-8771
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
67
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
965-71
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:1687951-Adrenergic alpha-Agonists,
pubmed-meshheading:1687951-Animals,
pubmed-meshheading:1687951-Clonidine,
pubmed-meshheading:1687951-Dioxanes,
pubmed-meshheading:1687951-Drug Tolerance,
pubmed-meshheading:1687951-Guanabenz,
pubmed-meshheading:1687951-Guanfacine,
pubmed-meshheading:1687951-Idazoxan,
pubmed-meshheading:1687951-Mice,
pubmed-meshheading:1687951-Morphine,
pubmed-meshheading:1687951-Motor Activity,
pubmed-meshheading:1687951-Naloxone,
pubmed-meshheading:1687951-Prazosin,
pubmed-meshheading:1687951-Receptors, Adrenergic, alpha,
pubmed-meshheading:1687951-Substance Withdrawal Syndrome
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pubmed:articleTitle |
Effect of alpha-adrenoreceptors in the control of spontaneous motility and morphine withdrawal syndrome.
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pubmed:affiliation |
Istituto di Farmacologia, Università di Ferrara.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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