2. Signaling Pathways
  3. GPCR/G Protein
    Neuronal Signaling
  4. Opioid Receptor

Opioid Receptor

Opioid Receptor

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Opioid receptors are a group of G protein-coupled receptors with opioids as ligands. The endogenous opioids are dynorphins, enkephalins, endorphins, endomorphins and nociceptin. Opioid receptors are distributed widely in the brain, and are found in the spinal cord and digestive tract. Opioid receptors are molecules, or sites, within the body that are activated by opioid substances. Opioid receptors inhibit the transmission of impulse in excitatory pathways within the human body system. These pathways include the serotonin, catecholamine, and substance P pathways, which are all implicated in pain perception and feelings of well-being. Opioid receptors are further subclassified into mu, delta, and kappa receptors. All the classes, while exhibiting differing modes of action, share some basic similarities. They all are driven by the potassium pump mechanism, which is found on the plasma membrane of the majority of cells.

Opioid Receptor Isoform Specific Products:

Opioid Receptor Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-107744
    Nalmefene
    		Modulator 99.70%
    Nalmefene is a BBB-penetrable opioid receptor modulator. Nalmefene is an antagonist of MOR and DOR, and a partial agonist of KOR. Nalmefene has anti-inflammatory and neuroprotective activities. Nalmefene can be used in the research of reducing alcohol-dependent disorders.
    Nalmefene
  • HY-12844
    Ro 64-6198
    		Agonist 99.82%
    Ro 64-6198 is a potent, selective, nonpeptide, high-affinity, high cellular permeability and brain penetration N/OFQ receptor (NOP) agonist with an EC50 value of 25.6 nM. Ro 64-6198 is at least 100 times more selective for the NOP receptor over the classic opioid receptors. Ro 64-6198 can be used for stress and anxiety, addiction, neuropathic pain, cough, and anorexia.
    Ro 64-6198
  • HY-124959
    Spiradoline mesylate
    		Agonist 99.95%
    Spiradoline mesylate (U-62066 mesylate), an arylacetamide, is a selective kappa opioid receptor (KOR) agonist with a Ki of 8.6 nM in guinea pig. The Ki values of Spiradoline mesylate for μ and δ receptors are 252 nM and 9400 nM, respectively. Spiradoline mesylate has potent diuretic, analgesic, antiarrythmic, antitussive, neuroprotective properties and easily penetrates the blood-brain barrier.
    Spiradoline mesylate
  • HY-101205
    ICI 199441
    		Agonist 99.39%
    ICI 199441 is a potent and selective κ-opioid receptor agonist. ICI 199441 can improve heart resistance to ischemia/reperfusion.
    ICI 199441
  • HY-P1337
    Dynorphin B (1-13)
    		Agonist 98.09%
    Dynorphin B (1-13) acts as an agonist on opioid κ-receptor.
    Dynorphin B (1-13)
  • HY-107747
    GR 89696
    		Agonist 99.88%
    GR 89696 is a highly selective κ2 opioid receptor agonist with potential to prevent pruritus.
    GR 89696
  • HY-B0418AR
    Loperamide hydrochloride (Standard)
    		Agonist 99.89%
    Loperamide (hydrochloride) (Standard) is the analytical standard of Loperamide (hydrochloride). This product is intended for research and analytical applications. Loperamide (hydrochloride) (R-18553 (hydrochloride)) is an opioid receptor agonist. Loperamide hydrochloride is a selective and competitive human intestinal carboxylesterases (hiCE) inhibitor. Loperamide hydrochloride has anti-diarrheal effect.
    Loperamide hydrochloride (Standard)
  • HY-101011
    Naloxonazine dihydrochloride
    		Antagonist 98.1%
    Naloxonazine dihydrochloride is a specific μ-opioid receptor antagonist with an IC50 of 5.4 nM. Naloxonazine dihydrochloride also shows anti-leishmanial activity.
    Naloxonazine dihydrochloride
  • HY-P1337A
    Dynorphin B (1-13) TFA
    		Agonist
    Dynorphin B (1-13) TFA acts as an agonist on opioid κ-receptor.
    Dynorphin B (1-13) TFA
  • HY-107722
    SCH 221510
    		Agonist 99.00%
    SCH 221510 is a potent, orally active and selective NOP (nociceptin opioid receptor) agonist, with an EC50 of 12 nM and Ki of 0.3 nM. SCH 221510 shows an anxiolytic-like effect.
    SCH 221510
  • HY-120511
    KNT-127
    		Agonist 99.60%
    KNT-127 is a selective and BBB-penetrant δ-opioid receptor (DOR) agonist (Ki = 0.16 nM). KNT-127 is highly selective to the δ receptor, with Ki values of 0.16, 21.3 and 153 nM for δ, μ and κ receptors, respectively. KNT-127 acts as a biased ligand that mainly activates cyclic adenosine monophosphate (cAMP) signaling with lower beta-arrestin signaling activation. KNT-127 increases the release of dopamine and L-glutamate in the striatum, nucleus accumbens, and prefrontal cortex. KNT-127 exhibits antidepressant- and anxiolytic-like effects. KNT-127 can be studied in research on neurological diseases.
    KNT-127
  • HY-P1470
    [Leu5]-Enkephalin, amide
    		Agonist
    [Leu5]-Enkephalin, amide is a δ opioid receptor agonist.
    [Leu5]-Enkephalin, amide
  • HY-101230
    ICI 174864
    		99.97%
    ICI 174864 is a highly selective, potent δ-receptor antagonist. ICI 174864 is equipotent with naloxone and can not reverse the effect of the μ-agonist [D-Ala2, MePhe4, Gly-Ol5]enkephalin or the κ-agonist-tifluadom.
    ICI 174864
  • HY-107384A
    Asimadoline hydrochloride
    		Agonist 99.82%
    Asimadoline (EMD-61753) hydrochloride is an orally active, selective and peripherally active κ-opioid agonist with IC50s of 5.6 nM (guinea pig) and 1.2 nM (human recombinant). Asimadoline hydrochloride has low permeability across the blood brain barrier and has peripheral anti-inflammatory actions. Asimadoline hydrochloride ameliorates allodynia in diabetic rats and has the potential for irritable bowel syndrome (IBS).
    Asimadoline hydrochloride
  • HY-P0098
    [D-Ala2]leucine-enkephalin
    		Agonist 98.64%
    [D-Ala2]leucine-enkephalin, a delta opioid agonist, is a degradation resistant long-acting Leu-enkephalin.
    [D-Ala2]leucine-enkephalin
  • HY-P1302
    Orphanin FQ(1-11)
    		Agonist 99.52%
    Orphanin FQ(1-11), a orphanin FQ or nociceptin (OFQ/N) fragment, is a potent NOP receptor (ORL-1; OP4) agonist, with a Ki of 55 nM. Orphanin FQ(1-11) has no affinity for μ, δ, κ1 and κ3 receptors (Ki>1000 nM). Orphanin FQ(1-11) is analgesic in CD-1 mice.
    Orphanin FQ(1-11)
  • HY-P0185A
    Endomorphin 1 acetate
    		Agonist 99.92%
    Endomorphin 1 acetate, a high affinity, highly selective agonist of the μ-opioid receptor (Ki: 1.11 nM), displays reasonable affinities for kappa3 binding sites, with Ki value between 20 and 30 nM. Endomorphin 1 acetate has antinociceptive properties.
    Endomorphin 1 acetate
  • HY-101079
    BRL 52537 hydrochloride
    		Agonist 98.14%
    BRL 52537 hydrochloride is a highly selective κ-Opioid receptor (KOR) agonist with Kis of 0.24 nM and 1560 nM for κ and μ subtypes, respectively. BRL 52537 hydrochloride decreases ischemia-evoked NO production as a potential mechanism of neuroprotection. BRL 52537 hydrochloride attenuates early stroke damage.
    BRL 52537 hydrochloride
  • HY-123689
    Samidorphan
    		Antagonist 99.04%
    Samidorphan (ALKS-33) is an orally active opioid system modulator that has a high affinity for binding with μ‐opioid, κ‐opioid, and δ‐opioid receptors. Samidorphan acts as an antagonist at μ‐opioid receptors and acts as a partial agonist at k-opioid and δ‐opioid receptors. Samidorphan primarily acts as an opioid receptor antagonist in vivo.
    Samidorphan
  • HY-123689
    Samidorphan
    		Modulator 99.04%
    Samidorphan (ALKS-33) is an orally active opioid system modulator that has a high affinity for binding with μ‐opioid, κ‐opioid, and δ‐opioid receptors. Samidorphan acts as an antagonist at μ‐opioid receptors and acts as a partial agonist at k-opioid and δ‐opioid receptors. Samidorphan primarily acts as an opioid receptor antagonist in vivo.
    Samidorphan
Cat. No. Product Name / Synonyms Application Reactivity
Opioid Receptor Isoform Comparison

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