Histamine H1 receptor
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- The correct title of this article is Histamine H1 receptor. It appears incorrectly here because of technical restrictions.
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Histamine receptor H1
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| Identifiers | ||||||||||||||
| Symbol(s) | HRH1; H1-R; hisH1 | |||||||||||||
| External IDs | OMIM: 600167 MGI: 107619 HomoloGene: 668 | |||||||||||||
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| RNA expression pattern | ||||||||||||||
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| Orthologs | ||||||||||||||
| Human | Mouse | |||||||||||||
| Entrez | 3269 | 15465 | ||||||||||||
| Ensembl | ENSG00000196639 | ENSMUSG00000053004 | ||||||||||||
| Uniprot | P35367 | P70174 | ||||||||||||
| Refseq | NM_000861 (mRNA) NP_000852 (protein) |
NM_008285 (mRNA) NP_032311 (protein) |
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| Location | Chr 3: 11.28 - 11.28 Mb | Chr 6: 114.36 - 114.45 Mb | ||||||||||||
| Pubmed search | [1] | [2] | ||||||||||||
The H1 receptor is a histamine receptor, and thus an important target for clinically important drugs, and is likely one of the most important receptors for modulating mammalian circadian cycles.
Histamine H1 receptor are metabotropic G-protein-coupled receptors expressed throughout the body, specifically in smooth muscles, on vascular endothelial cells, in the heart, and in the central nervous system. The H1 receptor is linked to an intracellular G-protein (Gq) which activates phospholipase C and the phosphatidylinositol (PIP2) signalling pathway.
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[edit] H1 receptor and inflammation
The production of prostaglandin E2 synthase induces the release of histamine from neurons, consequentially causing systemic vasodilation, along with increased cell permeability due to the its action on H1 receptors.
[edit] Neurophysiology
Histamine H1 receptors are activated by endogenous histamine, which is released by neurons which have their cell bodies in the tuberomamillary nucleus of the hypothalamus. The histaminergic neurons of the tuberomammillary nucleus become active during the 'wake' cycle, firing at approximately 2Hz; during slow wave sleep this firing rate drops to approximately 0.5Hz. Finally during REM sleep, histaminergic neurons stop firing all together. It has been reported that histaminergic neurons have the most wake-selective firing pattern of all known neuronal types.[1]
In the cortex, activation of H1 receptors leads to inhibition of cell membrane potassium channels. This depolarizes the neurons and increases the resistance of the neuronal cell membrane, bringing the cell closer to its firing threshold and increasing the excitatory voltage produced by a given excitatory current. H1 receptor antagonists, or antihistamines, produce drowsiness because they oppose this action, reducing neuronal excitation.[2]
[edit] H1-receptor antagonists
see Antihistamine - H1-receptor antagonists
[edit] References
- ^ Passani, M. B., Lin, J. S., Hancock, A., Crochet, S., Blandina, P., 2004. The histamine H3 receptor as a novel therapeutic target for cognitive and sleep disorders. Trends Pharmacol Sci 25, 618-625.
- ^ Reiner P. B., Kamondi A., 1994. Mechanisms of antihistamine-induced sedation in the human brain: H1 receptor activation reduces a background leakage potassium current. Neuroscience 59(3), 579-88.
[edit] Further reading
- Mitsuchashi M, Payan DG (1989). "Molecular and cellular analysis of histamine H1 receptors on cultured smooth muscle cells.". J. Cell. Biochem. 40 (2): 183–92. doi:. PMID 2670975.
- Braman SS (1987). "Histamine receptors in the lung.". N Engl Reg Allergy Proc 8 (2): 116–20. PMID 2886904.
- Hill SJ, Ganellin CR, Timmerman H, et al. (1997). "International Union of Pharmacology. XIII. Classification of histamine receptors.". Pharmacol. Rev. 49 (3): 253–78. PMID 9311023.
- Holden CA, Chan SC, Norris S, Hanifin JM (1988). "Histamine induced elevation of cyclic AMP phosphodiesterase activity in human monocytes.". Agents Actions 22 (1-2): 36–42. PMID 2891264.
- Moguilevsky N, Varsalona F, Noyer M, et al. (1994). "Stable expression of human H1-histamine-receptor cDNA in Chinese hamster ovary cells. Pharmacological characterisation of the protein, tissue distribution of messenger RNA and chromosomal localisation of the gene.". Eur. J. Biochem. 224 (2): 489–95. PMID 7925364.
- Fukui H, Fujimoto K, Mizuguchi H, et al. (1994). "Molecular cloning of the human histamine H1 receptor gene.". Biochem. Biophys. Res. Commun. 201 (2): 894–901. doi:. PMID 8003029.
- Le Coniat M, Traiffort E, Ruat M, et al. (1994). "Chromosomal localization of the human histamine H1-receptor gene.". Hum. Genet. 94 (2): 186–8. PMID 8045566.
- De Backer MD, Gommeren W, Moereels H, et al. (1994). "Genomic cloning, heterologous expression and pharmacological characterization of a human histamine H1 receptor.". Biochem. Biophys. Res. Commun. 197 (3): 1601–8. PMID 8280179.
- Hishinuma S, Young JM (1996). "Characteristics of the binding of [3H]-mepyramine to intact human U373 MG astrocytoma cells: evidence for histamine-induced H1-receptor internalisation.". Br. J. Pharmacol. 116 (6): 2715–23. PMID 8590995.
- Max SI, Chowdhury BA, Fraser CM (1996). "Sequence analysis of the 5'-untranslated region of the human H1 histamine receptor-encoding gene.". Gene 171 (2): 309–10. PMID 8666296.
- De Backer MD, Loonen I, Verhasselt P, et al. (1998). "Structure of the human histamine H1 receptor gene.". Biochem. J. 335 ( Pt 3): 663–70. PMID 9794809.
- Horváth BV, Szalai C, Mándi Y, et al. (1999). "Histamine and histamine-receptor antagonists modify gene expression and biosynthesis of interferon gamma in peripheral human blood mononuclear cells and in CD19-depleted cell subsets.". Immunol. Lett. 70 (2): 95–9. PMID 10569698.
- Wang KY, Arima N, Higuchi S, et al. (2000). "Switch of histamine receptor expression from H2 to H1 during differentiation of monocytes into macrophages.". FEBS Lett. 473 (3): 345–8. PMID 10818238.
- Oda T, Morikawa N, Saito Y, et al. (2001). "Molecular cloning and characterization of a novel type of histamine receptor preferentially expressed in leukocytes.". J. Biol. Chem. 275 (47): 36781–6. doi:. PMID 10973974.
- Brew OB, Sullivan MH (2002). "Localisation of mRNAs for diamine oxidase and histamine receptors H1 and H2, at the feto-maternal interface of human pregnancy.". Inflamm. Res. 50 (9): 449–52. PMID 11603849.
- Gutzmer R, Langer K, Lisewski M, et al. (2002). "Expression and function of histamine receptors 1 and 2 on human monocyte-derived dendritic cells.". J. Allergy Clin. Immunol. 109 (3): 524–31. PMID 11898002.
- Idzko M, la Sala A, Ferrari D, et al. (2002). "Expression and function of histamine receptors in human monocyte-derived dendritic cells.". J. Allergy Clin. Immunol. 109 (5): 839–46. PMID 11994709.
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