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

Orexin Receptor (OX Receptor)

Hypocretin Receptor; HCRT Receptor

Orexin Receptor (OX Receptor)

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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.

Orexin Receptor (OX Receptor) Isoform Specific Products:

Orexin Receptor (OX Receptor) Isoform Comparison
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-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 binds and activates two types of G protein-coupled receptors, the orexin-1 receptor (OX1R) and the orexin-2 receptor (OX2R). 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-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) binds and activates two types of G protein-coupled receptors, the orexin-1 receptor (OX1R) and the orexin-2 receptor (OX2R). 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-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-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 binds and activates two types of G protein-coupled receptors, the orexin-1 receptor (OX1R) and the orexin-2 receptor (OX2R). 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-162712
    OX-201
    		Agonist
    OX-201 is a selective agonist for OX2R with an EC50 of 8 nM. Pathological proteins produced by neurons are released into the interstitial fluid (ISF) in a manner dependent on neuronal activity and are cleared from the brain via lymphatic pathways. The outflow of pathological proteins to the ISF is related to the arousal state of neurons. OX-201 can induce neuronal awakening and promote the release of tau into the hippocampal ISF. Although OX-201 does not alter hippocampal tau levels, it has potential applications for Alzheimer's disease (AD) associated with sleep/wake rhythm disturbances.
    OX-201
  • HY-168571
    BTF
    BTF shows a selective binding affinity for OX1R with the Ki values of 2.33 nM and 62.8 nM of OX1R and OX2R, respectively.
    BTF
  • HY-159835
    Oveporexton
    		Agonist
    Oveporexton is an orexin type 2 receptor (OX2R) agonist.
    Oveporexton
  • 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-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-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-19320
    Orexin 2 Receptor Agonist
    		Agonist 99.59%
    Orexin 2 Receptor Agonist is a potent selective OX2R agonist with an EC50 of 23 nM.
    Orexin 2 Receptor Agonist
  • 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-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-P1339A
    Orexin B, human TFA
    		Agonist 99.16%
    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-19914
    MK-1064
    		Antagonist 99.95%
    MK-1064 is a selective and orally active OX2R antagonist (Ki: 0.5 nM, IC50: 18 nM). MK-1064 promotes sleep in vivo. MK-1064 can be used in the research of insomnia.
    MK-1064
  • 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-100452
    TCS-OX2-29
    		Antagonist 99.55%
    TCS-OX2-29 is a potent, high affinities and selective orexin-2 receptor (OX2R) antagonist with an IC50 value of 40 nM and a pKI value of 7.5. TCS-OX2-29 displays ~250-fold selectivity for OX2 over OX1.
    TCS-OX2-29
  • HY-P1341
    OXA(17-33)
    		Agonist
    OXA(17-33) is a potent and selective orexin-1 receptor (OX1) agonist. OXA(17-33) shows a ∼23-fold selectivity for the OX1 (EC50=8.29 nM) over OX2 (187 nM).
    OXA(17-33)
  • HY-154789
    RTIOXA-43
    		Agonist 99.94%
    RTIOXA-43 is a orexin receptor agonist with EC50s of 24 nM and 24 nM for OX2 and OX1 receptors, respectively.
    RTIOXA-43
Cat. No. Product Name / Synonyms Application Reactivity
Orexin Receptor (OX Receptor) Isoform Comparison

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