1. Signaling Pathways
  2. GPCR/G Protein
    Neuronal Signaling
  3. Orexin Receptor (OX Receptor)

Orexin Receptor (OX Receptor)

Hypocretin Receptor; HCRT Receptor

The orexin receptors (hypocretin receptors) are a family of G protein-coupled receptors and consist of orexin receptor 1 (OX1R) and orexin receptor 2 (OX2R) subtypes. Orexin receptors are expressed throughout the central nervous system and are involved in the regulation of the sleep/wake cycle.

Orexin A binding to OX1R and OX2R with similar affinity, and orexin B binding to OX2 with higher affinity than OX1R. OX1R is mainly expressed in the prefrontal and infralimbic cortex, hippocampus, paraventricular thalamic nucleus, and locus coeruleus. OX2R is mainly distributed in the cerebral cortex, septal nuclei, lateral hypothalamus, hippocampus, and hypothalamic nuclei.

Both OX1R and OX2R are coupled via Gq/11 to the activation of phospholipase C, leading to an elevation of intracellular Ca2+ levels. Moreover, OX2R also couples via Gs and Gi/o to the cAMP pathways.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-133898
    Danavorexton
    Activator 98.36%
    Danavorexton (TAK-925) is an orexin receptor agonist with brain permeability. Danavorexton induces a physiological pattern of OX2R activation in vitro to wake up sleepy mice and improve sleepiness symptoms.
    Danavorexton
  • HY-106224A
    Orexin A (human, rat, mouse) (TFA)
    Agonist
    Orexin A (human, rat, mouse) (Hypocretin-1 (human, rat, mouse)) TFA, a 33 amino acid excitatory neuropeptide, orchestrates diverse central and peripheral processes. Orexin A (human, rat, mouse) TFA is a specific, high-affinity agonist for G-protein-coupled receptor OX1R. Orexin A (human, rat, mouse) TFA has a role in the regulation of feeding behavior. Orexin A (human, rat, mouse) TFA is an effective anti-nociceptive and anti-hyperalgesic agent in mice and rats.
    Orexin A (human, rat, mouse) (TFA)
  • HY-10805
    Almorexant
    Antagonist 99.71%
    Almorexant (ACT 078573) is an orally active, potent and competitive dual orexin receptor antagonist, with Kd values of 1.3 nM (OX1) and 0.17 nM (OX2), respectively. Almorexant reversibly blocks signaling of orexin-A and orexin-B peptides. Almorexant totally blocked the intracellular Ca2+ signal pathway. Almorexant stimulates caspase-3 activity in AsPC-1 cells and induces apoptosis.
    Almorexant
  • HY-10895A
    SB-334867 free base
    Antagonist 99.88%
    SB-334867 free base (SB334867A free base) is an excellent, selective and blood–brain barrier permeable orexin-1 (OX1) receptor antagonist, shows selectivity over OX2 (pKb=7.4), 100-fold over 5-HT2B, 5-HT2C with pKi values of 5.4 and 5.3, respectively. SB-334867 reduces ethanol consumption and inhibits the acquisition of morphine-induced sensitization to locomotor activity in vivo.
    SB-334867 free base
  • HY-106224B
    Orexin A (human, rat, mouse) (acetate)
    Agonist 99.93%
    Orexin A (Hypocretin-1) (human, rat, mouse) acetate is a hypothalamic neuropeptide with analgesic properties (crosses the blood-brain barrier). Orexin A (human, rat, mouse) acetate is also an OX1R agonist that induces the expression of BDNF and TH proteins in SH-SY5Y cells in a time- and dose-dependent manner. Orexin A (human, rat, mouse) acetate can be used in studies of appetite regulation, neurodegenerative diseases and modulation of injurious messaging.
    Orexin A (human, rat, mouse) (acetate)
  • HY-162235
    CVN766
    Antagonist
    CVN766 is an orally active inhibitor of orexin 1 receptor antagonist with blood-brain permeability with the IC50 values of 8 nM and >10 μM for OX1R and OX2R, respectively. CVN766 can be used for study schizophrenia.
    CVN766
  • HY-161567
    OX2R-IN-3
    Antagonist
    OX2R-IN-3 (Compound 53) is an orally active type 2 orexin receptor (OX2R) agonist (EC50<100 nM.).
    OX2R-IN-3
  • HY-163276
    OX2R-IN-2
    Agonist
    OX2R-IN-2 (compound 63c) is an agonist for orexin receptor type 2 (OX2R) with EC50 of 339 nM. OX2R-IN-2 is able to cross the blood-brain barrier and exhibits no cytotoxicity in cells
    OX2R-IN-2
  • HY-136181
    YNT-185 dihydrochloride
    Agonist 99.78%
    YNT-185 dihydrochloride is a nonpeptide, selective orexin type-2 receptor (OX2R) agonist, with EC50s of 0.028 and 2.75 μM for OX2R and OX1R, respectively. YNT-185 dihydrochloride ameliorates narcolepsy-cataplexy symptoms in mouse models.
    YNT-185 dihydrochloride
  • HY-106224
    Orexin A (human, rat, mouse)
    Agonist 99.67%
    Orexin A (human, rat, mouse) (Hypocretin-1 (human, rat, mouse)), a 33 amino acid excitatory neuropeptide, orchestrates diverse central and peripheral processes. Orexin A (human, rat, mouse) is a specific, high-affinity agonist for G-protein-coupled receptor OX1R. Orexin A (human, rat, mouse) has a role in the regulation of feeding behavior. Orexin A (human, rat, mouse) is an effective anti-nociceptive and anti-hyperalgesic agent in mice and rats.
    Orexin A (human, rat, mouse)
  • HY-108682
    EMPA
    Antagonist 99.48%
    EMPA is a high-affinity, reversible and selective orexin OX2 receptor antagonist. [3H]EMPA binds to human and rat OX2-HEK293 membranes with KD values of 1.1 and 1.4 nM respectively.
    EMPA
  • HY-10895
    SB-334867
    Antagonist 99.44%
    SB-334867 (SB 334867A) is an excellent,selective and blood–brain barrier permeable orexin-1 (OX1) receptor antagonist, shows selectivity over OX2 (pKb=7.4), 100-fold over 5-HT2B, 5-HT2C with pKi values of 5.4 and 5.3, respectively. SB-334867 reduces ethanol consumption and inhibits the acquisition of morphine-induced sensitization to locomotor activity in vivo.
    SB-334867
  • HY-109012
    Seltorexant
    Antagonist 99.86%
    Seltorexant (JNJ-42847922) is an orally active, high-affinity, and selective orexin-2 receptor (OX2R) antagonist (pKi values of 8.0 and 8.1 for human and rat OX2R). Seltorexant (JNJ-42847922) crosses the blood-brain barrier and quickly occupies OX2R binding sites in the rat brain.
    Seltorexant
  • HY-10896
    JNJ-10397049
    Antagonist 99.91%
    JNJ-10397049 is a potent and selective orexin 2 receptor (OX2R) antagonist, with a pKi of 8.3. JNJ-10397049 is 600-fold selective for the OX2R over the OX1R.
    JNJ-10397049
  • HY-10805A
    Almorexant hydrochloride
    Antagonist 99.98%
    Almorexant (ACT 078573) hydrochloride is an orally active, potent and competitive dual orexin receptor antagonist, with Kd values of 1.3 nM (OX1) and 0.17 nM (OX2), respectively. Almorexant hydrochloride reversibly blocks signaling of orexin-A and orexin-B peptides. Almorexant hydrochloride totally blocked the intracellular Ca2+ signal pathway. Almorexant hydrochloride stimulates caspase-3 activity in AsPC-1 cells and induces apoptosis.
    Almorexant hydrochloride
  • HY-10898
    SB-674042
    Antagonist 99.93%
    SB-674042 is a potent and selective non-peptide orexin OX1 receptor antagonist (Kd=5.03 nM), exhibits 100-fold selectivity for OX1 over OX2 receptors with IC50 values of 3.76 nM and 531 nM, respectively.
    SB-674042
  • HY-19320
    Orexin 2 Receptor Agonist
    Agonist 99.75%
    Orexin 2 Receptor Agonist is a potent selective OX2R agonist with an EC50 of 23 nM.
    Orexin 2 Receptor Agonist
  • HY-109012A
    Seltorexant hydrochloride
    Antagonist 99.90%
    Seltorexant hydrochloride (JNJ-42847922 hydrochloride) is an orally active, high-affinity, and selective OX2R antagonist (pKi values of 8.0 and 8.1 for human and rat OX2R). Seltorexant hydrochloride crosses the blood-brain barrier and quickly occupies OX2R binding sites in the rat brain.
    Seltorexant hydrochloride
  • HY-P1339A
    Orexin B, human TFA
    Agonist 98.07%
    Orexin B, human (TFA) is an endogenous agonist at Orexin receptor with Kis of 420 and 36 nM for OX1 and OX2, respectively.
    Orexin B, human TFA
  • HY-15653
    Filorexant
    Antagonist 99.35%
    Filorexant (MK-6096) is an orally bioavailable potent and selective reversible antagonist of OX1 and OX2 receptor(<3 nM in binding).
    Filorexant
Cat. No. Product Name / Synonyms Application Reactivity