Source:http://linkedlifedata.com/resource/pubmed/id/17307162
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
2-3
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pubmed:dateCreated |
2007-3-9
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pubmed:abstractText |
The antinociceptive effect of i.t. administered N(alpha)-amidino-Tyr-d-Arg-Phe-beta-Ala (amidino-TAPA), an N-terminal tetrapeptide analog of dermorphin, was characterized in ddY mice. In the opioid receptor ligand-binding assays using mouse brain membranes, amidino-TAPA showed a very high affinity for mu-opioid receptors, a low affinity to delta-opioid receptors and no affinity for kappa-opioid receptors. In the mouse tail-flick test, i.t. treatment with amidino-TAPA produced a potent antinociception. The antinociception induced by amidino-TAPA was significantly attenuated by i.t. pretreatment with the mu-opioid receptor antagonist beta-funaltrexamine, the kappa-opioid receptor antagonist nor-binaltorphimine and the delta-opioid receptor antagonist naltrindole. Moreover, the antinociception induced by amidino-TAPA was significantly attenuated by i.t. pretreatment with antisera against the endogenous kappa-opioid peptides dynorphin A, dynorphin B and alpha-neo-endorphin; and the endogenous delta-opioid peptide [Leu(5)]enkephalin. In mice lacking prodynorphin, the precursor of the endogenous kappa-opioid peptides, the antinociceptive effect of amidino-TAPA was significantly attenuated compared to that in wild-type C57BL/6J mice. However, there was no difference in G-protein activation by amidino-TAPA in the spinal cord membranes from prodynorphin knockout mice and C57BL/6J mice. The present results suggest that the spinal antinociception induced by the mu-opioid receptor selective peptide amidino-TAPA is mediated in part by the release of endogenous opioid peptides in the spinal cord, which is caused by the direct stimulation of mu-opioid receptors.
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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/Analgesics,
http://linkedlifedata.com/resource/pubmed/chemical/Enkephalin, Ala(2)-MePhe(4)-Gly(5)-,
http://linkedlifedata.com/resource/pubmed/chemical/Enkephalin, D-Penicillamine (2,5)-,
http://linkedlifedata.com/resource/pubmed/chemical/GTP-Binding Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Guanosine 5'-O-(3-Thiotriphosphate),
http://linkedlifedata.com/resource/pubmed/chemical/Oligopeptides,
http://linkedlifedata.com/resource/pubmed/chemical/Opioid Peptides,
http://linkedlifedata.com/resource/pubmed/chemical/tyrosyl-arginyl-phenylalanyl-glycina...
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pubmed:status |
MEDLINE
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pubmed:month |
Apr
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pubmed:issn |
0014-2999
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
10
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pubmed:volume |
560
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
150-9
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pubmed:meshHeading |
pubmed-meshheading:17307162-Analgesics,
pubmed-meshheading:17307162-Animals,
pubmed-meshheading:17307162-Enkephalin, Ala(2)-MePhe(4)-Gly(5)-,
pubmed-meshheading:17307162-Enkephalin, D-Penicillamine (2,5)-,
pubmed-meshheading:17307162-GTP-Binding Proteins,
pubmed-meshheading:17307162-Guanosine 5'-O-(3-Thiotriphosphate),
pubmed-meshheading:17307162-Injections, Spinal,
pubmed-meshheading:17307162-Male,
pubmed-meshheading:17307162-Mice,
pubmed-meshheading:17307162-Mice, Inbred C57BL,
pubmed-meshheading:17307162-Mice, Knockout,
pubmed-meshheading:17307162-Oligopeptides,
pubmed-meshheading:17307162-Opioid Peptides
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pubmed:year |
2007
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pubmed:articleTitle |
Involvement of endogenous opioid peptides in the antinociception induced by the novel dermorphin tetrapeptide analog amidino-TAPA.
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pubmed:affiliation |
Department of Physiology and Anatomy, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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