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H1 receptor

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Immunopharmacology Ligand  Target has curated data in GtoImmuPdb

Target id: 262

Nomenclature: H1 receptor

Family: Histamine receptors

Gene and Protein Information Click here for help
class A G protein-coupled receptor
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human 7 487 3p25.3 HRH1 histamine receptor H1 18-19,27,50,70
Mouse 7 488 6 53.05 cM Hrh1 histamine receptor H1 39
Rat 7 486 4q42 Hrh1 histamine receptor H 1 25
Previous and Unofficial Names Click here for help
H1R | HH1R | Hisr
Database Links Click here for help
Specialist databases
GPCRDB hrh1_human (Hs), hrh1_mouse (Mm), hrh1_rat (Rn)
Other databases
Alphafold
ChEMBL Target
DrugBank Target
Ensembl Gene
Entrez Gene
Human Protein Atlas
KEGG Gene
OMIM
Pharos
RefSeq Nucleotide
RefSeq Protein
SynPHARM
UniProtKB
Wikipedia
Selected 3D Structures Click here for help
Image of receptor 3D structure from RCSB PDB
Description:  Histamine H1 receptor in complex with antagonist
PDB Id:  3RZE
Ligand:  doxepin
Resolution:  3.1Å
Species:  Human
References:  85
Natural/Endogenous Ligands Click here for help
histamine

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Agonists
Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Value Parameter Reference
dimethylhistaprodifen Small molecule or natural product Hs Full agonist 6.4 pKi 84
pKi 6.4 [84]
methylhistaprodifen Small molecule or natural product Hs Full agonist 6.4 pKi 84
pKi 6.4 (Ki 3.98x10-7 M) [84]
ST-1006 Small molecule or natural product Click here for species-specific activity table Hs Agonist <6.0 pKi 77
pKi <6.0 (Ki >1x10-6 M) [77]
2-(3-iodophenyl)histamine Small molecule or natural product Hs Full agonist 5.8 pKi 84
pKi 5.8 [84]
2-(3-bromophenyl)histamine Small molecule or natural product Click here for species-specific activity table Hs Full agonist 5.7 pKi 84
pKi 5.7 [84]
2-(3-chlorophenyl)histamine Small molecule or natural product Hs Full agonist 5.7 pKi 84
pKi 5.7 [84]
histaprodifen Small molecule or natural product Hs Full agonist 5.7 pKi 53
pKi 5.7 [53]
2-(2-thiazolyl)ethanamine Small molecule or natural product Hs Partial agonist 5.3 pKi 84
pKi 5.3 [84]
histamine Small molecule or natural product Click here for species-specific activity table Ligand is endogenous in the given species Ligand has a PDB structure Immunopharmacology Ligand Hs Full agonist 4.7 – 5.9 pKi 8,70,80,84,93
pKi 4.7 – 5.9 [8,70,80,84,93]
UR-PG55B Small molecule or natural product Hs Full agonist 5.2 pKi 93
pKi 5.2 [93]
UR-PG131A Small molecule or natural product Hs Full agonist 4.7 pKi 93
pKi 4.7 [93]
UR-PG153 Small molecule or natural product Hs Full agonist 4.7 pKi 93
pKi 4.7 [93]
oxo-arpromidine Small molecule or natural product Click here for species-specific activity table Hs Full agonist 4.5 pKi 93
pKi 4.5 [93]
UR-PG146 Small molecule or natural product Click here for species-specific activity table Hs Full agonist 4.4 pKi 93
pKi 4.4 [93]
2-pyridylethylamine Small molecule or natural product Immunopharmacology Ligand Hs Full agonist 3.7 pKi 80
pKi 3.7 [80]
vilazodone Small molecule or natural product Approved drug Click here for species-specific activity table Ligand has a PDB structure Hs Agonist 6.5 pIC50 35
pIC50 6.5 (IC50 3.17x10-7 M) [35]
Antagonists
Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Value Parameter Reference
[11C]doxepin Small molecule or natural product Ligand is labelled Ligand is radioactive Ligand has a PDB structure Hs Antagonist 9.0 pKd 41
pKd 9.0 (Kd 1x10-9 M) [41]
[3H]pyrilamine Small molecule or natural product Click here for species-specific activity table Ligand is labelled Ligand is radioactive Hs Inverse agonist 8.4 – 9.1 pKd 19,70,83-84
pKd 8.4 – 9.1 (Kd 4x10-9 – 7.9x10-10 M) [19,70,83-84]
tripelennamine Small molecule or natural product Approved drug Primary target of this compound Immunopharmacology Ligand Hs Antagonist 8.0 pKd 34
pKd 8.0 (Kd 1x10-8 M) [34]
clemastine Small molecule or natural product Approved drug Primary target of this compound Click here for species-specific activity table Immunopharmacology Ligand Hs Antagonist 10.3 pKi 3
pKi 10.3 (Ki 4.9x10-11 M) [3]
cyproheptadine Small molecule or natural product Approved drug Primary target of this compound Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 10.2 pKi 70
pKi 10.2 [70]
asenapine Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 9.8 pKi 83
pKi 9.8 [83]
doxepin Small molecule or natural product Approved drug Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 9.5 – 10.0 pKi 8
pKi 9.5 – 10.0 [8]
promethazine Small molecule or natural product Approved drug Primary target of this compound Hs Antagonist 9.6 pKi 29
pKi 9.6 (Ki 2.4x10-10 M) [29]
amitriptyline Small molecule or natural product Approved drug Primary target of this compound Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 9.3 pKi 29
pKi 9.3 (Ki 5x10-10 M) [29]
Description: Antagonism of [3H]mepyramine binding
clozapine Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 8.8 – 9.6 pKi 8,47,83
pKi 8.8 – 9.6 [8,47,83]
zotepine Small molecule or natural product Approved drug Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 9.2 pKi 83
pKi 9.2 [83]
alimemazine Small molecule or natural product Approved drug Immunopharmacology Ligand Bt Antagonist 9.1 pKi 48
pKi 9.1 (Ki 7.2x10-10 M) [48]
Description: Inhibition of [3H]mepyramine binding to bovine brain membrane preparations in vitro.
desloratadine Small molecule or natural product Approved drug Primary target of this compound Immunopharmacology Ligand Hs Antagonist 9.0 pKi 51
pKi 9.0 (Ki 9.7x10-10 M) [51]
olanzapine Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 8.7 – 9.2 pKi 47,83
pKi 8.7 – 9.2 [47,83]
azelastine Small molecule or natural product Approved drug Primary target of this compound Hs Antagonist 8.9 pKi 79
pKi 8.9 (Ki 1.26x10-9 M) [79]
mepyramine Small molecule or natural product Approved drug Primary target of this compound Immunopharmacology Ligand Hs Inverse agonist 8.7 – 9.0 pKi 8,80
pKi 8.7 – 9.0 [8,80]
triprolidine Small molecule or natural product Approved drug Primary target of this compound Hs Antagonist 8.5 – 9.0 pKi 8,70
pKi 8.5 – 9.0 (Ki 3.16x10-9 – 1x10-9 M) [8,70]
(-)-trans-H2-PAT Small molecule or natural product Hs Antagonist 8.6 – 8.8 pKi 8
pKi 8.6 – 8.8 [8]
hydroxyzine Small molecule or natural product Approved drug Primary target of this compound Immunopharmacology Ligand Hs Antagonist 8.7 pKi 31
pKi 8.7 (Ki 1.99x10-9 M) [31]
ketotifen Small molecule or natural product Approved drug Primary target of this compound Hs Antagonist 8.6 pKi 49
pKi 8.6 (Ki 2.5x10-9 M) [49]
mizolastine Small molecule or natural product Approved drug Primary target of this compound Immunopharmacology Ligand Hs Antagonist 8.6 pKi 13
pKi 8.6 (Ki 2.7x10-9 M) [13]
Description: Radioligand displacement membrane binding assay using CHO cells expressing the human H1 receptor and [3H]pyrilamine as tracer.
astemizole Small molecule or natural product Approved drug Primary target of this compound Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 8.5 pKi 78
pKi 8.5 (Ki 3x10-9 M) [78]
(±)-trans-H2-PAT Small molecule or natural product Hs Antagonist 8.4 – 8.6 pKi 8
pKi 8.4 – 8.6 [8]
(R)-cetirizine Small molecule or natural product Approved drug Primary target of this compound Ligand has a PDB structure Hs Inverse agonist 8.5 pKi 80
pKi 8.5 [80]
(+)-chlorpheniramine Small molecule or natural product Hs Antagonist 8.3 – 8.6 pKi 8,70
pKi 8.3 – 8.6 [8,70]
thiothixene Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 8.4 pKi 47
pKi 8.4 [47]
dosulepin Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 8.4 pKi 87
pKi 8.4 (Ki 4x10-9 M) [87]
quetiapine Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 8.0 – 8.7 pKi 47,83
pKi 8.0 – 8.7 [47,83]
cyclizine Small molecule or natural product Approved drug Primary target of this compound Hs Antagonist 8.4 pKi 3
pKi 8.4 (Ki 4.44x10-9 M) [3]
chlorpromazine Small molecule or natural product Approved drug Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 8.2 pKi 47
pKi 8.2 [47]
loxapine Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 8.2 pKi 47
pKi 8.2 [47]
cetirizine Small molecule or natural product Approved drug Primary target of this compound Immunopharmacology Ligand Hs Inverse agonist 8.2 pKi 70
pKi 8.2 [70]
chlorpheniramine Small molecule or natural product Approved drug Primary target of this compound Hs Antagonist 8.1 pKi 79
pKi 8.1 (Ki 7x10-9 M) [79]
perphenazine Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 8.1 pKi 47
pKi 8.1 [47]
(±)-cis-H2-PAT Small molecule or natural product Hs Antagonist 7.8 – 8.2 pKi 8
pKi 8.1 – 8.2 [8]
pKi 7.8 – 7.9 [8]
fluspirilene Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 7.9 pKi 83
pKi 7.9 [83]
diphenhydramine Small molecule or natural product Approved drug Primary target of this compound Ligand has a PDB structure Hs Antagonist 7.9 pKi 8
pKi 7.9 [8]
risperidone Small molecule or natural product Approved drug Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 7.6 – 7.8 pKi 47,83
pKi 7.6 – 7.8 [47,83]
thioridazine Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 7.7 pKi 47
pKi 7.7 [47]
fluphenazine Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 7.7 pKi 47
pKi 7.7 [47]
ziprasidone Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 7.4 – 7.8 pKi 47,83
pKi 7.4 – 7.8 [47,83]
fexofenadine Small molecule or natural product Approved drug Primary target of this compound Immunopharmacology Ligand Hs Antagonist 7.6 pKi 2
pKi 7.6 (Ki 2.7x10-8 M) [2]
aripiprazole Small molecule or natural product Approved drug Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 7.5 pKi 47
pKi 7.5 [47]
9-OH-risperidone Small molecule or natural product Click here for species-specific activity table Hs Antagonist 7.5 pKi 83
pKi 7.5 [83]
AZD3778 Small molecule or natural product Click here for species-specific activity table Hs Antagonist 7.5 pKi 5
pKi 7.5 (Ki 3.16x10-8 M) [5]
Description: Assayed using the sodium salt of the compound
(+)-trans-H2-PAT Small molecule or natural product Hs Antagonist 7.4 – 7.5 pKi 8
pKi 7.4 – 7.5 [8]
loratadine Small molecule or natural product Approved drug Primary target of this compound Click here for species-specific activity table Immunopharmacology Ligand Hs Antagonist 7.4 pKi 44
pKi 7.4 (Ki 3.7x10-8 M) [44]
terfenadine Small molecule or natural product Approved drug Primary target of this compound Click here for species-specific activity table Immunopharmacology Ligand Hs Antagonist 7.4 pKi 2
pKi 7.4 (Ki 4x10-8 M) [2]
trifluoperazine Small molecule or natural product Approved drug Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 7.2 pKi 47
pKi 7.2 [47]
bilastine Small molecule or natural product Approved drug Hs Antagonist 7.2 pKi 14
pKi 7.2 (Ki 6.4x10-8 M) [14]
Description: Binding to human recombinant histamine H1 receptors
(S)-dimetindene Small molecule or natural product Click here for species-specific activity table Immunopharmacology Ligand Hs Antagonist 7.2 pKi 11
pKi 7.2 (Ki 6.9x10-8 M) [11]
rupatadine Small molecule or natural product Approved drug Immunopharmacology Ligand Cp Antagonist 7.0 pKi 64
pKi 7.0 (Ki 1x10-7 M) [64]
Description: [3H]-pyrilamine binding to guinea pig cerebellum membranes.
sertindole Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 6.9 pKi 47,83
pKi 6.9 [47,83]
(+)-cis-H2-PAT Small molecule or natural product Hs Antagonist 6.9 pKi 8
pKi 6.9 [8]
(S)-cetirizine Small molecule or natural product Ligand has a PDB structure Hs Inverse agonist 6.7 pKi 80
pKi 6.7 [80]
BU-E 47 Small molecule or natural product Hs Antagonist 6.6 pKi 84
pKi 6.6 [84]
(-)-chlorpheniramine Small molecule or natural product Hs Antagonist 6.4 – 6.7 pKi 8
pKi 6.4 – 6.7 [8]
arpromidine Small molecule or natural product Click here for species-specific activity table Immunopharmacology Ligand Hs Antagonist 6.5 pKi 84,93
pKi 6.5 [84,93]
pimozide Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 6.2 pKi 47
pKi 6.2 [47]
JNJ-39758979 Small molecule or natural product Click here for species-specific activity table Immunopharmacology Ligand Hs Antagonist <6.0 pKi 77
pKi <6.0 (Ki >1x10-6 M) [77]
haloperidol Small molecule or natural product Approved drug Click here for species-specific activity table Ligand has a PDB structure Hs Antagonist 5.7 – 6.1 pKi 47,83
pKi 5.7 – 6.1 [47,83]
ABT-239 Small molecule or natural product Click here for species-specific activity table Hs Inverse agonist 5.8 pKi 23
pKi 5.8 [23]
pitolisant Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 5.8 pKi 77
pKi 5.8 [77]
molindone Small molecule or natural product Approved drug Click here for species-specific activity table Hs Antagonist 5.7 pKi 47
pKi 5.7 [47]
pipamperone Small molecule or natural product Click here for species-specific activity table Hs Antagonist 5.6 pKi 83
pKi 5.6 [83]
A-349821 Small molecule or natural product Click here for species-specific activity table Hs Inverse agonist 5.6 pKi 22
pKi 5.6 [22]
clobenpropit Small molecule or natural product Click here for species-specific activity table Immunopharmacology Ligand Hs Antagonist 5.6 pKi 24
pKi 5.6 [24]
A-317920 Small molecule or natural product Click here for species-specific activity table Hs Antagonist 5.4 pKi 22,24
pKi 5.4 [22,24]
impromidine Small molecule or natural product Click here for species-specific activity table Immunopharmacology Ligand Hs Antagonist 5.2 pKi 93
pKi 5.2 [93]
ciproxifan Small molecule or natural product Click here for species-specific activity table Hs Antagonist <5.0 pKi 77
pKi <5.0 (Ki >1x10-5 M) [77]
MK-0249 Small molecule or natural product Click here for species-specific activity table Hs Antagonist <5.0 pKi 77
pKi <5.0 (Ki >1x10-5 M) [77]
conessine Small molecule or natural product Click here for species-specific activity table Hs Antagonist <5.0 pKi 77
pKi <5.0 (Ki >1x10-5 M) [77]
INCB-38579 Small molecule or natural product Click here for species-specific activity table Hs Antagonist <5.0 pKi 77
pKi <5.0 (Ki >1x10-5 M) [77]
rupatadine Small molecule or natural product Approved drug Primary target of this compound Click here for species-specific activity table Immunopharmacology Ligand Hs Antagonist 8.4 pIC50 73
pIC50 8.4 (IC50 3.9x10-9 M) [73]
epinastine Small molecule or natural product Approved drug Primary target of this compound Immunopharmacology Ligand Hs Antagonist 7.6 pIC50 37
pIC50 7.6 (IC50 2.5x10-8 M) [37]
Description: Antagonism of 5 nM [3H]mepyramine binding in an intact cell assay using U373 MG astrocytoma cells.
tripelennamine Small molecule or natural product Approved drug Primary target of this compound Immunopharmacology Ligand Hs Antagonist 7.4 pIC50 34
pIC50 7.4 (IC50 3.98x10-8 M) [34]
mizolastine Small molecule or natural product Approved drug Immunopharmacology Ligand Cp Antagonist 7.3 pIC50 6
pIC50 7.3 (IC50 4.7x10-8 M) [6]
Description: Inhibition of [3H]pyrilamine binding to histamine H1 receptors in guinea pig cerebellar membranes and sections.
[11C]pyrilamine Small molecule or natural product Ligand is labelled Ligand is radioactive Hs Inverse agonist - -
View species-specific antagonist tables
Antagonist Comments
Astemizole is highly selective for the histamine H1 receptor over the H2 receptor.
Immunopharmacology Comments
The H1 receptor was the first of the family to be targeted for clinical use, with antagonists (anti-histamines) developed that are still used widely to treat allergic inflammation such as rhinitis, allergic conjunctivitis, urticaria and even anaphylaxis.
Cell Type Associations
Immuno Cell Type:  Granulocytes
Cell Ontology Term:   eosinophil (CL:0000771)
Comment:  Eosinophils express all four histamine receptor subtypes.
References:  30,65
Immuno Cell Type:  Mast cells
Cell Ontology Term:   mast cell (CL:0000097)
Comment:  In humans, mast cells express H1R, H2R and H4R.
References:  28
Immuno Process Associations
Immuno Process:  Inflammation
GO Annotations:  Associated to 2 GO processes
GO:0006954 inflammatory response TAS
click arrow to show/hide IEA associations
GO:0048245 eosinophil chemotaxis IEA
Immuno Process:  Chemotaxis & migration
GO Annotations:  Associated to 1 GO processes, IEA only
click arrow to show/hide IEA associations
GO:0048245 eosinophil chemotaxis IEA
Primary Transduction Mechanisms Click here for help
Transducer Effector/Response
Gq/G11 family Adenylyl cyclase stimulation
Comments:  Stimulation of cAMP accumulation is via Gβγ subunits of Gq [59].
References:  59
Secondary Transduction Mechanisms Click here for help
Transducer Effector/Response
Gq/G11 family Phospholipase C stimulation
References:  52
Tissue Distribution Click here for help
Cranial arteries.
Species:  Human
Technique:  RT-PCR.
References:  43
Brain: cerebrum.
Heart: myocardium (ventricle > atrium).
Species:  Human
Technique:  Northern and Western blotting.
References:  63
Brain.
Species:  Human
Technique:  Positron emission tomography (PET).
References:  69
Myometrium.
Species:  Human
Technique:  Radioligand binding.
References:  32
Gastrointestinal tract.
Species:  Human
Technique:  qRT-PCR and immunohistochemistry.
References:  81
Uterine horns.
Species:  Mouse
Technique:  Radioligand binding.
References:  33
Mast cells.
Species:  Mouse
Technique:  RT-PCR.
References:  38
Embryonic brain and spinal cord.
Species:  Rat
Technique:  in situ hybridization, RT-PCR and Northern blotting.
References:  46
Sympathetic preganglionic neurons in the spinal cord.
Species:  Rat
Technique:  RT-PCR.
References:  91
Cochlea.
Species:  Rat
Technique:  RT-PCR.
References:  4
Brain: cerebrum.
Heart: myocardium (atrium and ventricle).
Species:  Rat
Technique:  Northern and Western blotting.
References:  63
Expression Datasets Click here for help

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Log average relative transcript abundance in mouse tissues measured by qPCR from Regard, J.B., Sato, I.T., and Coughlin, S.R. (2008). Anatomical profiling of G protein-coupled receptor expression. Cell, 135(3): 561-71. [PMID:18984166] [Raw data: website]

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Functional Assays Click here for help
Measurement of IP levels in COS-7 cells transfected with the human H1 receptor.
Species:  Human
Tissue:  COS-7 cells.
Response measured:  Stimulation of IP formation.
References:  18
Measurement of IP levels in CHO cells transfected with the human H1 receptor.
Species:  Human
Tissue:  CHO cells.
Response measured:  Stimulation of IP formation.
References:  8
Measurement of AC activity in baculovirus-infected Sf9 insect cells expressing the human H1 receptor.
Species:  Human
Tissue:  Sf9 cells.
Response measured:  Stimulation of AC activity.
References:  93
Measurement of cAMP levels in CHO cells transfected with the human H1 receptor.
Species:  Human
Tissue:  CHO cells.
Response measured:  Stimulation of cAMP accumulation.
References:  59
Measurement of PLC activity and Ca2+ mobilisation in cultured ciliary muscle cells endogenously expressing the H1 receptor.
Species:  Human
Tissue:  Cultured ciliary muscle cells.
Response measured:  Activation of PLC and mobilisation of both intracellular and extracellular Ca2+.
References:  57
Measurement of IP levels in cultured human endothelial cells endogenously expressing the H1 receptor.
Species:  Human
Tissue:  Cultured umbilical vein endothelial cells.
Response measured:  Stimulation of IP formation.
References:  54
Measurement of mitogenesis in human astrocytoma U373 MG cells endogenously expressing the H1 receptor.
Species:  Human
Tissue:  Astrocytoma U373 MG cells.
Response measured:  Cell proliferation via PKC and MAPK.
References:  36
Measurement of Ca2+ levels as well as ERK1/2 and PKC activity in human primary epithelial cells and the NCI-H292 cell line, both endogenously expressing the H1 receptor.
Species:  Human
Tissue:  Primary epithelial cells and the NCI-H292 cell line.
Response measured:  Elevation of Ca2+ levels and activation of PKC and ERK1/2.
References:  62
Measurement of IP, DAG and Ca2+ levels in human HeLa carcinoma cells endogenously expressing the H1 receptor.
Species:  Human
Tissue:  HeLa carcinoma cells.
Response measured:  Formation of IP and DAG and a rise in Ca2+ levels.
References:  89
Physiological Functions Click here for help
Modulation of neuronal firing.
Species:  Rat
Tissue:  Dorsal raphe nucleus.
References:  10
Relaxation of smooth muscle (via an endothelial H1 receptor).
Species:  Human
Tissue:  Cranial arteries.
References:  43
Contraction of smooth muscle.
Species:  Human
Tissue:  Arterial rings.
References:  17
Modulation of adrenergic neurotransmission.
Species:  Rat
Tissue:  Vas deferens.
References:  90
Bronchoconstriction.
Species:  Human
Tissue:  In vivo.
References:  12,15,20,55,74,88
Inhibition of locomotor behaviour.
Species:  Rat
Tissue:  In vivo.
References:  1
Modulation of feeding behaviour.
Species:  Rat
Tissue:  In vivo.
References:  26
Modulation of feeding behaviour.
Species:  Mouse
Tissue:  In vivo.
References:  60-61,71-72
Hypernociception.
Species:  Rat
Tissue:  In vivo.
References:  56
Endothelium-dependent vasodilation.
Species:  Rat
Tissue:  Mesenteric vascular beds.
References:  45
Role in the stimulation of skin blood flow during whole body heating.
Species:  Human
Tissue:  In vivo.
References:  92
Stimulation of the nitric oxide signalling system.
Species:  Rat
Tissue:  Submandibular gland.
References:  9
Increased vascular permeability.
Species:  Mouse
Tissue:  In vivo.
References:  7,75
Contraction of smooth muscle.
Species:  Human
Tissue:  Isolated uterine strips.
References:  58
Contraction of smooth muscle.
Species:  Rat
Tissue:  Isolated stomach fundus.
References:  21
Increase in substantia nigra pars reticulata (SNr) inhibitory projection neuron firing frequency (via cell depolarisation).
The balance between the effect of H1 and H2 receptors and the opposing effect of H3 receptors may contribute to movement control.
Species:  Mouse
Tissue:  Coronal midbrain slices.
References:  96
Depolarisation.
Species:  Rat
Tissue:  Sympathetic preganglionic neurons.
References:  91
Regulation of cytokine production.
Species:  Mouse
Tissue:  CD4+ and CD8+ T cells.
References:  86
Prostacyclin formation.
Species:  Human
Tissue:  Pulmonary artery.
References:  82
Physiological Consequences of Altering Gene Expression Click here for help
H1 receptor knockout mice develop normally, but exhibit impaired locomotor activity and exploratory behavior.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  40,95
H1 receptor knockout mice subjected to social isolation after weaning exhibit similar levels of locomotor activity to socially reared H1 receptor knockout mice. This is in contrast to wild-type mice, where there is a significant decrease in locomotor activity in socially isolated WT mice compared with socially reared WT mice. It is suggested that blockade of H1 receptors by atypical antipsychotics attenuates social isolation-induced behavioral changes.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  16
H1 receptor knockout mice exhibit decreased exploratory activity, reduced levels of anxiety and aggression, a decrease in nociceptive response and an increased 5-HT turnover rate in the cerebral cortex and hippocampus.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  94
H1 receptor knockout mice exhibit a significant decrease in nociception compared to wild-type mice.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  67
H1 knockout mice exhibit enhancement of morphine-induced antinociception.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  66
H1 receptor knockout mice do not exhibit an increase in respiratory frequency upon elevation of body temperature, as observed in wild-type mice.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  42
H1 receptor knockout mice exhibit a reduction in the effect of neurotensin on the supression of food intake.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  76
H1 receptor knockout mice do not exhibit an increase in vascular permeability of the conjunctiva, as observed in wild-type mice.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  75
CD4+ T cells from H1 receptor knockout mice exhibit a decrease in the release of Il-2 and Il-10, and an increase in the release of IL-4. CD8+ T cells from H1 receptor knockout mice also exhibit a decrease in the release of Il-2 and Il-10, as well as an increase in the release of IFN-γ.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  86
H1 receptor knockout mice exhibit enhanced antinociception by administration of orexin-A, compared to wild-type mice following administration of orexin-A.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  68
Phenotypes, Alleles and Disease Models Click here for help Mouse data from MGI

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Allele Composition & genetic background Accession Phenotype Id Phenotype Reference
Hrh1tm1Wtn Hrh1tm1Wtn/Hrh1tm1Wtn
involves: 129P2/OlaHsd * C57BL/6
MGI:107619  MP:0004924 abnormal behavior PMID: 8917588 
Hrh1tm1Wtn Hrh1tm1Wtn/Hrh1tm1Wtn
involves: 129P2/OlaHsd * C57BL/6
MGI:107619  MP:0001502 abnormal circadian rhythm PMID: 8917588 
Hrh1tm1Wtn Hrh1tm1Wtn/Hrh1tm1Wtn
B6.129P2-Hrh1
MGI:107619  MP:0003638 abnormal response/metabolism to endogenous compounds PMID: 15331534 
Hrh1tm1Wtn Hrh1tm1Wtn/Hrh1tm1Wtn
involves: 129P2/OlaHsd * C57BL/6
MGI:107619  MP:0005093 decreased B cell proliferation PMID: 9989982 
Hrh1tm1Wtn Hrh1tm1Wtn/Hrh1tm1Wtn
B6.129P2-Hrh1
MGI:107619  MP:0001262 decreased body weight PMID: 15331534 
Hrh1tm1Wtn Hrh1tm1Wtn/Hrh1tm1Wtn
B6.129P2-Hrh1
MGI:107619  MP:0002727 decreased circulating insulin level PMID: 15331534 
Hrh1tm1Wtn Hrh1tm1Wtn/Hrh1tm1Wtn
B6.129P2-Hrh1
MGI:107619  MP:0003910 decreased eating behavior PMID: 15331534 
Hrh1tm1Wtn Hrh1tm1Wtn/Hrh1tm1Wtn
involves: 129P2/OlaHsd * C57BL/6
MGI:107619  MP:0001417 decreased exploration in new environment PMID: 8917588 
Hrh1tm1Wtn Hrh1tm1Wtn/Hrh1tm1Wtn
involves: 129P2/OlaHsd * C57BL/6
MGI:107619  MP:0008498 decreased IgG3 level PMID: