Opioid Receptor

ZT 52656A is a selective agonist of kappa opioid, and used for the prevention or alleviation of pain in the eye.

AT-121 is a dual μ-opioid and neuropeptide receptor partial agonist (Kis 16.49 and 3.67 nM, respectively). It stimulates [35S]GTPγS binding to cell membranes expressing either μ-opioid receptors or neuropeptide receptors (EC50s of 19.6 and 34.7 nM, respectively.) AT-121 (0.003-0.03 mg kg) reduced capsaicin-induced thermal anisocoria in a dose-dependent manner, but did not increase scratching activity in rhesus monkeys. In rhesus monkey drug self-administration tests, AT-121 at doses of 0.3 to 10 μg kg per injection lacked reinforcing effects (a potential marker of abuse) and did not reduce the reinforcing effects of food pellets.AT-121 (0.01 or 0.03 mg kg) did not induce hyperalgesia, a marker of tolerance, in rhesus monkeys.AT-121 is a safe non-addictive pain reliever with anti-injury and analgesic effects.

Cebranopadol (GRT6005) is an analgesic NOP and opioid receptor agonist with Kis of 0.9 nM, 0.7 nM, 2.6 nM, 18 nM for human NOP, μ-opioid (MOP), κ-opioid (KOP) and δ-opioid (DOP) receptor, respectively.

Difelikefalin acetate (CR 845 acetate) is a peripherally restricted kappa opioid receptor agonist. CR845 exhibit low P450 CYP inhibition and low penetration into the brain.

DAMGO TFA (78123-71-4(Free base)) is a potent and selective agonist of the Mu-opioid receptor and an analgesic that stimulates calcium-activated adenylate cyclase-associated cAMP production and induces TGF-beta1 expression at the protein and mRNA levels.

Apitegromab (SRK-015) is a new myostatin inhibitor, an antibody targeting myostatin precursor, which can be used to study neuromuscular diseases including spinal muscular atrophy.

DuP 747 HCl is a selective kappa agonist with analgesic activity.DuP 747 consists of two conformations.

Samidorphan HCl is an orally active and highly potent modulator of the opioid system that binds to μ‐opioid, κ‐opioid, and delta-opioid receptors. Samidorphan HCl is a novel μ-opioid receptor antagonist, a partial agonist for k-opioid and delta-opioid receptors. Samidorphan HCl can be used to prevent and treat schizophrenia.

Faxeladol, a potent adrenergic absorption inhibitor and serotonin reuptake inhibitor, is a small-molecule Opioid receptor agonist that can be used to study neurological disorders.

Salvinorin A is a non-nitrogenous κ-opioid selective agonist.

SNC 80 (NIH 10815) is a potent, highly selective and non-peptide δ-opioid receptor agonist, Ki = 1.78 nM, IC50 = 2.73 nM. SNC80 also selectively activates μ-δ heteromer in HEK293 cells with an EC50 of 52.8 nM. SNC80 shows antinociceptive, antihyperalgesic and antidepressant‐like effects. SNC80 has the potential for multiple headache disorders treatment.

DAMGO (DAGO) is an opioid receptor agonist with the ability to affect the locomotive activity in rodents. Possible analgesic agent due to μ-opiod receptor interaction.

Amentoflavone (3',8''-Biapigenin), as a potent inhibitor of CYP3A4 and CYP2C9, can interact with many other medications. CYP3A4 and CYP2C9 are proteins used for drug metabolism in the body. Amentoflavone also is an inhibitor of human cathepsin B. It has antimalarial activity in trials significant affinities towards the Delta-1, kappa opioid receptors (as an antagonist) and binds to benzodiazepine receptors. Amentoflavone may be a potential lead for a new type of anti-inflammatory agents having the dual inhibitory activity of group II phospholipase A2 and cyclooxygenase. Amentoflavone and quercetin differentially exerted suppression of PGE2 biosynthesis via downregulation of COX-2 iNOS expression.

PZM21 is an effective and selective μ opioid receptor agonist (EC50: 1.8 nM).

BMS986187 is a novel Potent and Selective Positive Allosteric Modulators of the delta-Opioid Receptor.

CTAP(TFA) (103429-32-9 free base) is a potent, highly selective, and brain-penetrant antagonist of the μ-opioid receptor with IC50 of 3.5 nM. It displays over 1200-fold selectivity over δ opioid (IC50=4500 nM) and somatostatin receptors. CTAP(TFA） (103429-32-9 free base) can be used for the study of L-DOPA-induced dyskinesia (LID)

[Leu5]-Enkephalin (Leu-enkephalin) is an endogenous neuropeptide involved in nociception and an agonist of δ-opioid and μ-opioid receptors (Kis = 4.0 and 3.4 nM, respectively)

SCH-486757 is an agonist of nociceptin-1 (NOP1) and orphanin FQ peptide receptors and is used in the study of cough.

Sinomenine (Kukoline) is a pure alkaloid isolated from the Sinomenium acutum, is utilized in the treatment of rheumatism and arthritis.

6'-GNTI dihydrochloride is a κ-opioid receptor (KOR) agonist that favors activation of G-protein-mediated signaling over recruitment of β-aspirin 2. 6'-GNTI dihydrochloride only activates the Akt pathway in striatal neurons.

Neuropeptide AF (human) acetate (Neuropeptide AF (human) acetate (192387-38-5 Free base)) is an anti-opioid neuropeptide, a Neuropeptide AF (human) derivative, which regulates adipocyte metabolism.

ADL-5747 (ADL-5747 (free base)) (free base) is a delta opioid receptor agonist used in the treatment of neurological disorders, skin and musculoskeletal disorders, and may be used in the study of postherpetic neuralgia, knee osteoarthritis and pain.

Matrine (Vegard), an alkaloid isolated from the Sophora genus, acts as a kappa opioid receptor agonist.

Progesterone (Pregn-4-ene-3,20-dione) is the major progestational steroid that is secreted primarily by the CORPUS LUTEUM and the PLACENTA. Progesterone acts on the UTERUS, the MAMMARY GLANDS and the BRAIN. It is required in EMBRYO IMPLANTATION; PREGNANCY maintenance, and the development of mammary tissue for MILK production.

UFP-101 acetate is a selective and competitive antagonist of the NOP receptor (pKi = 10.24) with >3000-fold selectivity over δ, μ, and κ opioid receptors.

Dynorphin A acetate is an Endogenous kappa receptor agonist.

Naltrexone hydrochloride (Naltrexone HCl) is a synthetic opioid antagonist used in the prevention of relapse of opiate addiction and alcoholism.

EST73502 is an agonist of μ-opioid receptor(Ki = 64 nM) agonist and an antagonist of σ1 receptor (Ki = 118 nM). EST73502 displays antinociceptive activity.

Norbinaltorphimine dihydrochloride is a selective and potent κ opioid receptor antagonist that induces itch-associated responses in mice.

AT-121 hydrochloride is a dual agonist of nociception and mu opioid receptor with Ki values of 3.67 and 16.49 nM, respectively.AT-121 hydrochloride is a safe, non-addictive, pain relieving compound with anti-injury and analgesic activity. AT-121 hydrochloride is a safe, non-addictive, pain relieving compound with anti-injury and analgesic activity.

JNJ-20788560 is a delta opioid receptor (DOR) agonist with analgesic activity. It is more selective for DOR than for mu opioid receptors (MOR).

Loperamide hydrochloride (ADL 2-1294) is a synthetic, piperidine derivative and opioid agonist with antidiarrheal activity.

Alvimopan (LY 246736) is a synthetic trans-3, 4-dimethyl-4-(3-hydroxyphenyl) piperidine with peripherally selective opioid mu receptor antagonist activity. Alvimopan is a selective and competitive antagonist at mu-opioid receptors, found in myenteric and submucosal neurons and the immune cells of the lamina propria in the human gut. Upon administration, this agent binds to mu-opioid receptors in the gut, thereby reversing opioid-related disturbances in gut motility. Alvimopan is approximately three to nine times more potent than naloxone.

Bevenopran (CB-5945) is a peripheral antagonist of μ-opioid receptor and can be used in studies about the treatment of opioid-induced bowel dysfunction.

DPDPE TFA is selective δ-opioid receptor agonist peptide. Inhibits electrically stimulated contraction of mouse vas deferens in vitro (EC50 = 5.2 nM), and is antinociceptive in vivo.

Endomorphins-2 (EM-2) could decrease both the frequency and amplitude of the sEPSC of the motoneurons in lamina IX, which was reversed by the MOR antagonist CTOP. EM-2-IR fibers originated from primary afferent fibers form symmetric synaptic connections with motoneurons innervating skeletal muscles of the lower limbs in lamina IX of the spinal ventral horn and EM-2 might exert inhibitory effects on the activities of these motoneurons through both presynaptic and postsynaptic mechanisms.

Meptazinol hydrochloride (Meptazinol HCl) , a unique centrally opioid analgesic, is used as a narcotic antagonist with analgesic properties.

BMS-986122 (BMS 986122) is a positive allosteric modulator of μ-opioid receptors that increases β-arrestin recruitment stimulated by endomorphin 1 in U2OS-OPRM1 human osteosarcoma cells expressing μ-opioid receptors (EC50 = 3 μM).

Endomorphin 1 is a high affinity and selective agonist of the μ-opioid receptor and displays reasonable affinities for kappa3 binding sites (Ki: 20~30 nM).

SCH 221510 is an orally available, selective and potent NOP agonist with an EC50 of 12 nM and a Ki of 0.3 nM.SCH 221510 has anxiolytic activity and can be used to study neurological disorders.

LY2940094 (LY-2940094) decreases ethanol self-administration in animal models. LY2940094 is an effective, selective, and orally available nociceptin receptor antagonist with high affinity (Ki=0.105 nM) and antagonist potency (Kb=0.166 nM).

Aticaprant (CERC-501) is a potent and centrally-penetrant antagonist of the kappa-opioid receptor (Ki: 0.807 nM).[2]

Orphanin FQ(1-11) acetate(178249-41-7 free base) is a peptide fragment containing amino acids 1-11 of Nociceptin. Orphanin FQ(1-11) acetate(178249-41-7 free base) is a potent agonist of the ORL1 KOR-3 receptor (Ki = 55 nM) and displays no affinity for opioid receptors, including μ, δ, κ1 and κ3 receptors (Ki >1000 nM). Orphanin FQ(1-11) acetate(178249-41-7 free base) displays analgesic properties in CD-1 mice.

1. Corydaline (Corydalin), an isoquinoline alkaloid, is one of the major active constituents in a new prokinetic botanical agent. 2. Corydaline promotes gastric emptying and small intestinal transit and facilitates gastric accommodation. 3. Corydaline exhibits the anti-acetylcholinesterase, antiallergic, and antinociceptive activities. 4. Corydaline has potent inhibition of CYP2C19 and CYP2C9.

Difelikefalin acetate (CR 845 acetate) is a peripherally restricted kappa opioid receptor agonist. CR845 exhibit low P450 CYP inhibition and low penetration into the brain.

NNC 63-0532 is a potentnociceptin receptor agonist, Ki=7.3 nM, EC50=305 nM.

Mirtazapine (6-Azamianserin) is a tetracyclic antidepressant with a somewhat unique mechanism of action. Mirtazapine therapy can be associated with transient asymptomatic elevations in serum aminotransferase levels and has been linked to rare instances of clinically apparent acute liver injury.

ADL-5859 (ADL5859 Hydrochloride) is a selective δ-opioid receptor agonist ( Ki: 0.8 nM), selectivity against opioid receptor κ, μ, and little inhibition for the hERG channel.