Behavioral effects of a synthetic agonist selective for nociceptin/orphanin FQ peptide receptors in monkeys.
Behavioral effects of a synthetic agonist selective for nociceptin/orphanin FQ peptide receptors in monkeys.
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DOI:
10.1038/npp.2009.33
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发表时间:
2009-08
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影响因子:
--
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中科院分区:
文献类型:
--
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Behavioral effects of a nonpeptidic NOP (nociceptin/orphanin FQ Peptide) receptor agonist, Ro 64-6198, have not been studied in primate species. The aim of the study was to verify the receptor mechanism underlying the behavioral effects of Ro 64-6198 and to systematically compare behavioral effects of Ro 64–6198 with those of a μ-opioid receptor agonist, alfentanil, in monkeys. Both Ro 64-6198 (0.001–0.06 mg/kg, s.c.) and alfentanil (0.001–0.06 mg/kg, s.c.) produced antinociception against an acute noxious stimulus (50°C water) and capsaicin-induced allodynia. An NOP receptor antagonist, J-113397 (0.01–0.1 mg/kg, s.c.), dose-dependently produced rightward shifts of the dose–response curve of Ro 64-6198-induced antinociception. The apparent pA2 value of J-113397 was 8.0. Antagonist studies using J-113397 and naltrexone revealed that Ro 64-6198 produced NOP receptor-mediated antinociception independent of μ-opioid receptors. In addition, alfentanil dose-dependently produced respiratory depression and itch/scratching responses, but antinociceptive doses of Ro 64-6198 did not produce such effects. More important, Ro 64-6198 did not produce reinforcing effects comparable with those of alfentanil, cocaine, or methohexital under self-administration procedures in monkeys. These results provide the first functional evidence that the activation of NOP receptors produces antinociception without reinforcing effects in primates. Non-peptidic NOP receptor agonists may have therapeutic value as novel analgesics without abuse liability in humans.
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影响因子:
3.3
作者:
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通讯作者:
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影响因子:
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作者:
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DOI:
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通讯作者:
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影响因子:
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作者:
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