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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Effects of sigma ligands on the nociceptin/orphanin FQ receptor co-expressed with the G-protein-activated K+ channel in Xenopus oocytes.

Taking advantage of the functional coupling of the nociceptin/orphanin FQ receptor with the G-protein- activated inwardly rectifying K+ (GIRK) channel, we investigated the effects of various sigma ligands on the nociceptin/orphanin FQ receptor in Xenopus oocytes co-injected with the cloned nociceptin/orphanin FQ receptor and GIRK1 mRNAs. Carbetapentane and rimcazole, which induced no current response at 100 microM, reversibly suppressed the inward K+ current responses induced by nociceptin in a concentration-dependent manner, and the IC50 values (microM) for these compounds were 9.0 and 12.6, respectively. (+/-)-N-allylnormetazocine. (+)-cyclazocine, (+)-3-(3-hydroxyphenyl)-N-(1-propyl)piperidine and 1,3-di-(2-tolyl)guanidine, at 100 microM, had no effect on the receptor. These results suggest that carbetapentane and rimcazole act as antagonists at the nociceptin/orphanin FQ receptor and may be involved in pain regulation.[1]

References

  1. Effects of sigma ligands on the nociceptin/orphanin FQ receptor co-expressed with the G-protein-activated K+ channel in Xenopus oocytes. Kobayashi, T., Ikeda, K., Togashi, S., Itoh, N., Kumanishi, T. Br. J. Pharmacol. (1997) [Pubmed]
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