Cebranopadol|863513-91-1|安捷凯

Background

Cebranopadol is an agonist of nociceptin-, μ-, ?-, and δ-opioid receptor agonist?(K_is = 0.9, 0.7, 2.6, and 18 nM, respectively).¹ It is greater than 100-fold selective for these receptors over a panel of more than 100 ion channels, neurotransmitter transporters, receptors, and enzymes, but does bind to the serotonin (5-HT) receptor subtype 5-HT_5A with a K_i value of 8.7 nM. Cebranopadol inhibits nociceptin-, DAMGO-, and SNC 80-induced GTP?S binding in CHO cells expressing nociceptin-, μ-, and δ-opioid receptors, respectively (EC₅₀s = 13, 1.2, and 110 nM, respectively), as well as U69,593-induced GTP?S binding in HEK293 cells expressing the ?-opioid receptor (EC₅₀ = 17 nM). It increases the paw withdrawal threshold in rat models of bone cancer pain and streptozotocin-induced diabetic neuropathy (ED₅₀s = 3.6 and 0.5 μg/kg, respectively, i.v.). Cebranopadol also increases paw weight bearing on the ipsilateral side in a rat model of arthritis induced by complete Freund's adjuvant (CFA) and M. tuberculosis (ED₅₀ = 5.5 μg/kg, i.v.).

1.Linz, K., Christoph, T., Tzschentke, T.M., et al.Cebranopadol: A novel potent analgesic nociceptin/orphanin FQ peptide and opioid receptor agonistJ. Pharmacol. Exp. Ther.349(3)535-548(2014)

Protocol

Kinase experiment:

Human MOP, DOP, KOP, and NOP receptor binding assays are run in microtiter plates with wheat germ agglutinin-coated scintillation proximity assay beads. [N-allyl-2,3-3H]naloxone and [tyrosyl-3,5-3H]deltorphin II, [3H]Ci-977, and [leucyl-3H]nociceptin are used as ligands for the MOP, DOP, KOP, and NOP receptor binding studies, respectively. The KD values of the radioligands used for the calculation of Ki values are provided as supplemental information. The assay buffer used for the MOP, DOP, and KOP receptor binding studies is 50 mM Tris-HCl (pH 7.4) supplemented with 0.052 mg/mL bovine serum albumin. For the NOP receptor binding studies, the assay buffer used is 50 mM HEPES, 10 mM MgCl2, 1 mM EDTA (pH 7.4). The final assay volume of 250 μL/well included 1 nM [3H]naloxone, 1 nM [3H]deltorphin II, 1 nM [3H]Ci-977, or 0.5 nM [3H]nociceptin as a ligand and cebranopadol in dilution series. Cebranopadol is diluted with 25% DMSO in water to yield a final 0.5% DMSO concentration, which also served as a respective vehicle control. Assays are started by the addition of beads (1 mg beads/well), which had been preloaded for 15 minutes at room temperature with 23.4 μg of human MOP membranes, 12.5 μg of human DOP membrane, 45 μg of human KOP membranes, or 25.4 μg of human NOP membranes per 250 μL of final assay volume. After short mixing, the assays are run for 90 minutes at room temperature. The microtiter plates are then centrifuged for 20 minutes at 500 rpm, and the signal rate is measured by means of a 1450 MicroBeta Trilux. IC50 values reflecting 50% displacement of [3H]naloxone-, [3H]deltorphin II-, [3H]Ci-977-, or [3H]nociceptin-specific receptor binding are calculated by nonlinear regression analysis. Individual experiments are run in duplicate and are repeated three times in independent experiments[1].

Animal experiment:

Rats[1] The pharmacokinetic properties of cebranopadol in rats are investigated after a single intravenous dose of 160 μg/kg cebranopadol. The intravenous dose is administered as a bolus in a volume of 2 mL/kg with a catheter in the vena femoralis. Blood samples (200 μL/sample) are withdrawn via an implanted arterial catheter (arteria carotis) by an automated blood sampling system at the following sampling times: 0 (predose), 5, 15, 30, 60, 180, 360, 720, and 1440 minutes after administration. Blood samples are centrifuged, and plasma is separated. Plasma concentrations of cebranopadol are determined using a validated liquid chromatography-tandem mass spectrometry method. The lower limit of quantification for cebranopadol in this method is 0.05 ng/mL using a sample volume of 50 μL of plasma.

参考文献:

[1]. Linz K, et al. Cebranopadol: a novel potent analgesic nociceptin/orphanin FQ peptide and opioid receptor agonist. J Pharmacol Exp Ther. 2014 Jun;349(3):535-48.
[2]. de Guglielmo G, et al. Cebranopadol Blocks the Escalation of Cocaine Intake and Conditioned Reinstatement of Cocaine Seeking in Rats. J Pharmacol Exp Ther. 2017 Sep;362(3):378-384.
[3]. Satat K, et al. Evaluation of cebranopadol, a dually acting nociceptin/orphanin FQ and opioid receptor agonist in mouse models of acute, tonic, and chemotherapy-induced neuropathic pain. Inflammopharmacology. 2017 Oct 25.

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信号通路

生命科学

有机化学

无机化学

材料科学

Cebranopadol

Cebranopadol详情

Background

Protocol

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