2. Signaling Pathways
  3. GPCR/G Protein
    Immunology/Inflammation
    Neuronal Signaling
  4. Histamine Receptor

Histamine Receptor

Histamine Receptor

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Histamine Receptors are a class of G protein-coupled receptors with histamine as their endogenous ligand. There are four known histamine receptors: H1 receptor, H2 receptor, H3 receptor, H4 receptor. The H1 receptor is a histamine receptor belonging to the family of Rhodopsin-like G-protein-coupled receptors. This receptor, which is activated by the biogenic amine histamine, is expressed throughout the body, to be specific, in smooth muscles, on vascular endothelial cells, in the heart, and in the central nervous system. H2 receptors are positively coupled to adenylate cyclase via Gs. It is a potent stimulant of cAMP production, which leads to activation of Protein Kinase A. Histamine H3 receptors are expressed in the central nervous system and to a lesser extent the peripheral nervous system, where they act asautoreceptors in presynaptic histaminergic neurons, and also control histamine turnover by feedback inhibition of histamine synthesis and release. The Histamine H4 receptor has been shown to be involved in mediating eosinophil shape change and mast cell chemotaxis.

Histamine Receptor Isoform Specific Products:

Histamine Receptor Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-W777002
    Famotidine-13C3
    Famotidine-13C3 (MK-208-13C3) is the 13C-labeled Famotidine (HY-B0377). Famotidine (MK-208) is a competitive histamine H2-receptor antagonist. Its main pharmacodynamic effect is the inhibition of gastric secretion.
    Famotidine-<sup>13</sup>C<sub>3</sub>
  • HY-B1589
    (±)-Carbinoxamine
    		Antagonist
    (±)-Carbinoxamine is a histamine H1 receptor antagonist.
    (±)-Carbinoxamine
  • HY-B0520AR
    Benztropine mesylate (Standard)
    		Inhibitor
    Benztropine (mesylate) (Standard) is the analytical standard of Benztropine (mesylate). This product is intended for research and analytical applications. Benztropine mesylate (Benzatropine mesylate) is an orally active centrally acting anticholinergic agent that can be used for Parkinson's disease research. Benztropine mesylate is an anti-histamine agent and a dopamine re-uptake inhibitor. Benztropine mesylate is also a human D2 dopamine receptor allosteric antagonist. Benztropine mesylate also has anti-CSCs (cancer stem cells) effects.
    Benztropine mesylate (Standard)
  • HY-17428B
    Tripelennamine citrate
    		Antagonist
    Tripelennamine citrate, an ethylenediamine derivative, is a potent histamine H1-receptor antagonist. Tripelennamine citrate lessens the allergic response of the organism caused by histamine. Tripelennamine citrate can be used for the research of rhinitis, conjunctivitis, and allergic and anaphylactic reactions.
    Tripelennamine citrate
  • HY-B0157S
    Ketotifen-13C,d3
    		Inhibitor
    Ketotifen-13C,d3 is deuterium labeled Ketotifen.
    Ketotifen-<sup>13</sup>C,d<sub>3</sub>
  • HY-B0274R
    Chlorprothixene (Standard)
    		Antagonist
    Chlorprothixene (Standard) is the analytical standard of Chlorprothixene. This product is intended for research and analytical applications. Chlorprothixene is a dopamine and histamine receptors antagonist with Kis of 18 nM, 2.96 nM, 4.56 nM, 9 nM and 3.75 nM for hD1, hD2, hD3, hD5 and hH1 receptors, respectively. Antipsychotic activity.
    Chlorprothixene (Standard)
  • HY-B0725R
    Doxepin Hydrochloride (Standard)
    		Antagonist
    Doxepin (Hydrochloride) (Standard) is the analytical standard of Doxepin (Hydrochloride). This product is intended for research and analytical applications. Doxepin hydrochloride is an orally active tricyclic antidepressant agent. Doxepin hydrochloride is a potent and selective histamine receptor H1 antagonist. Doxepin hydrochloride is also a potent CYP450 inhibitor and significantly inhibits CYP450 2C19 and 1A2. Doxepin inhibits reuptake of serotonin and norepinephrine as a tricyclic antidepressant.
    . Doxepin has therapeutic effects in atopic dermatitis，chronic urticarial，can improve cognitive processes， protect central nervous system.
    . Doxepin has also been proposed as a protective factor against oxidative stress.
    .
    Doxepin Hydrochloride (Standard)
  • HY-162812
    H3R antagonist 4
    		Inhibitor
    H3R antagonist 4 (compound 11L) was a dual inhibitor of cholinesterase and histamine receptor (H3R), with corresponding IC50 of 7.04 μM (eeAChE), 9.73 μM (hAChE)(reversible) and 1.09 nM (H3R) , respectively. H3R antagonist 4 inhibited the aggregation of Aβ1-42 induced by itself and Cu2+ (95.48% and 88.63%) , and degraded the Aβ1-42 fibrils induced by itself and Cu2+ (80.16% and 89.30%) . H3R antagonist 4 chelate biometals such as Cu2+, Zn2+, Al3+, and Fe2+. H3R antagonist 4 significantly reduced tau protein hyperphosphorylation induced by Aβ1-42 and inhibited RSL-3-induced apoptosis and ferroptosis in PC12 cells. H3R antagonist 4 had the best blood-brain barrier permeability and intestinal absorption in hCMEC/D3 and hPepT1-MDCK cells.H3R antagonist 4 ameliorates learning and memory impairment in a mouse model of Alzheimer's disease induced by scopolamine (HY-N0296) .
    H3R antagonist 4
  • HY-113936
    A-943931
    		Antagonist
    A-943931 is a potent and selective histamine H4 receptor (H4R) antagonist with pKi values of 4.6, 3.8 nM for human and rat H4R, respectively. A-943931 shows anti-inflammatory and antinociceptive efficacy.
    A-943931
  • HY-W748758
    (Z)-Thiothixene-d8
    (Z)-Thiothixene-d8 (NSC 108165-d8; Navan-d8; Navane-d8) is the deuterium labeled Thiothixene (HY-A0139). Thiothixene is a typical antipsychotic. It selectively binds to dopamine D2 over D1, D3, and D4 receptors (Kis=0.417, 338, 186.2, and 363.1 nM, respectively). Thiothixene also binds to various serotonin (5-HT), histamine H1, α1- and α2-adrenergic, muscarinic acetylcholine, and sigma receptors (Kis=15-5,754 nM) as well as the dopamine, norepinephrine, and serotonin transporters (Kis=3.16-30 μM). In vivo, thiothixene reduces spontaneous and amphetamine-induced locomotor activity in rats. It enhances latent inhibition, as measured by a decreased lick latency in response to light and foot shock stimuli, which is a measure of selective attention in rats.3 Thiothixene also increases competitive behavior in submissive mice, indicating antidepressant-like behavior.
    (Z)-Thiothixene-d<sub>8</sub>
  • HY-155614
    KSK68
    		Antagonist
    KSK68 is a high-affinity dual sigma-1 and histamine H3 receptor antagonist, with Kis of 7.7, 3.6, 22.4 nM for H3 receptor, sigma-1, sigma-2 receptor respectively. KSK68 has negligible affinity at the other histamine receptor subtypes. KSK68 can be used for research of nociceptive and neuropathic pain.
    KSK68
  • HY-149335
    Sigma-1 receptor antagonist 5
    		Antagonist
    Sigma-1 receptor antagonist 5 (compound 12)，a 4-pyridylpiperidine derivative with analgesic activity，is an antagonist of sigma receptor (Ki=4.5 nM (σ1R)，10 nM (σ2R)) and histamine H3 (hH3R，Ki=7.7 nM，IC50=215 nM). Sigma-1 receptor antagonist 5 suppresses Capsaicin-induced nociception with antinociceptive activity and shows potent efficacy in nociceptive and neuropathic pain models.
    Sigma-1 receptor antagonist 5
  • HY-136818
    DA 4643 dihydrochloride
    		Antagonist
    DA 4643 (hydrochloride) is an H2 receptor antagonist with the chemical name 2-guanidino-4 (3-methylaminomethyleneiminophenyl) thiazole dihydrochloride. It has a weak interaction with cytochrome P-450 and has a less inhibitory effect on P-450 than cimetidine and tiotidine. DA 4643 (hydrochloride) is able to inhibit both enzymatic and non-enzymatic lipid peroxidation reactions. This inhibition may not be achieved by inhibiting agent metabolizing enzymes, but rather due to the antioxidant properties of the compound itself. Compared with other H2 receptor antagonists such as cimetidine, ranitidine and tiotidine, DA 4643 (hydrochloride) shows a unique effect in lipid peroxidation inhibition. These properties make DA 4643 (hydrochloride) a potential H2 receptor antagonist with multiple mechanisms of action.
    DA 4643 dihydrochloride
  • HY-B0801S2
    Fexofenadine-d3
    Fexofenadine-d3 is the deuterium labeled Fexofenadine. Fexofenadine (MDL-16455) is an orally active and nonsedative H1 receptor antagonist. Fexofenadine can be used in allergic rhinitis and chronic idiopathic urticarial research.
    Fexofenadine-d<sub>3</sub>
  • HY-B1557A
    Betazole dihydrochloride
    		Agonist
    Betazole (Ametazole) dihydrochloride, a pyrazole analogue of histamine, is an orally active H2 receptor agonist. Betazole dihydrochloride induces gastric acid secretion, and causes an immediate and significant increase in common bile duct pressure. Betazole dihydrochloride has been used as a diagnostic agent known as histalog, for investigating gastric acid secretory capacity.
    Betazole dihydrochloride
  • HY-115833
    Histamine H4 receptor antagonist-2
    		Antagonist
    Histamine H4 receptor antagonist-2 serves as a potent activator of p53, demonstrating significant antitumor efficacy.
    Histamine H4 receptor antagonist-2
  • HY-117046
    AVN-101
    		Inhibitor
    AVN-101 is a potent, brain-penetrant and orally active 5-HT7 receptor antagonist (Ki of 153 pM), with slightly lesser potency toward 5-HT6, 5-HT2A, and 5HT-2C receptors (Ki values of 2.04 nM, 1.56  nM, and 1.17  nM, respectively). AVN-101 also exhibits a rather high affinity toward histamine H1 (Ki of 0.58 nM) and adrenergic α2A, α2B, and α2C (Ki= 0.41-3.6 nM) receptors. AVN-101 can be studied in such diseases as general anxiety disorders, depression, schizophrenia, Alzheimer’s disease, and multiple sclerosis.
    AVN-101
  • HY-A0178AR
    Isothipendyl hydrochloride (Standard)
    		Antagonist
    Isothipendyl (hydrochloride) (Standard) is the analytical standard of Isothipendyl (hydrochloride). This product is intended for research and analytical applications. Isothipendyl hydrochloride (), an azaphenothiazine derivative, is a potent histamine 1 (H1) receptor antagonist.othipendyl is a primary metabolite.
    Isothipendyl hydrochloride (Standard)
  • HY-156973
    Tiopropamine
    Tiopropamine is an anti-inflammatory agent, with potential effect on histamine receptor.
    Tiopropamine
  • HY-123829
    LY2624803
    		Inhibitor
    LY2624803 is a 5-HT2A and histamine, H1 receptor antagonist.
    LY2624803
Cat. No. Product Name / Synonyms Application Reactivity
Histamine Receptor Isoform Comparison

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