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. 2000 Jul;21(7):1141-6.
doi: 10.1016/s0196-9781(00)00252-7.

Agonistic effects of the opioid buprenorphine on the nociceptin/OFQ receptor

P Bloms-Funke  1 , C Gillen, A J Schuettler, S Wnendt
Affiliations

Agonistic effects of the opioid buprenorphine on the nociceptin/OFQ receptor

P Bloms-Funke et al. Peptides. 2000 Jul.

Abstract

The nociceptin/orphanin FQ (N/OFQ) receptor (e.g. the human ortholog ORL1) has been shown to be pharmacologically distinct from classic opioid receptors. Recently, we have identified buprenorphine as a full ORL1 agonist using a reporter gene assay. For further functional analysis, buprenorphine's effects on ORL1 receptors were investigated using a K(+) channel (GIRK1) assay in Xenopus oocytes and GTPgammaS assay in CHO-K1 membrane preparations. In both assays, buprenorphine behaved as a partial agonist compared to nociceptin itself. The N/OFQ agonism of buprenorphine might contribute to actions of buprenorphine in pain models in vivo beside its mu- or kappa-opioid receptor mediated effects.

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