5-hydroxytryptamine receptor 1B also known as the 5-HT1B receptor is a protein that in humans is encoded by the HTR1Bgene.[5][6] The 5-HT1B receptor is a 5-HT receptor subtype.[7]
5-HT1B receptors are widely distributed throughout the central nervous system with the highest concentrations found in the frontal cortex, basal ganglia, striatum, and the hippocampus.[8] The function of the 5-HT1B receptor differs depending upon its location. In the frontal cortex, it is believed to act as a terminal receptor inhibiting the release of dopamine. In the basal ganglia and the striatum, evidence suggests 5-HT signaling acts on an autoreceptor, inhibiting the release of serotonin[9] and decreasing glutamatergic transmission by reducing miniature excitatory postsynaptic potential (mEPSP) frequency,[10] respectively. In the hippocampus, a recent study has demonstrated that activation of postsynaptic 5-HT1Bheteroreceptors produces a facilitation in excitatory synaptic transmission which is altered in depression.[11] When the expression of 5-HT1B in human cortex was traced throughout life, significant changes during adolescence were observed, in a way that is strongly correlated with the expression of 5-HT1E.[12]
Outside of the CNS, the 5-HT1B receptor is also expressed on the endothelium of blood vessels, particularly in the meninges.[13] Activation of these receptors results in vasoconstriction. The high distribution of vasoconstrictive 5-HT1B and 5-HT1D receptors around the brain makes them a valuable drug target for the treatment of migraines.[13]
Blocking 5-HT1B receptor signalling also increases the number of osteoblasts, bone mass, and the bone formation rate.[14]
Knockout mice lacking the 5-HT1B gene have been reported to have a higher preference for alcohol, although later studies failed to replicate such abnormalities in alcohol consumption.[15] These mice have also been reported to have a lower measure of anxiety (such as on the elevated plus maze test) and a higher measure of aggression.[15]
Under basal conditions, knockout mice present with a "normal" phenotype and exhibit a sucrose preference (lack of sucrose preference is considered a measure of anhedonia). However, after undergoing chronic unpredictable stress treatment to induce a "depression-like" phenotype these animals do not benefit from administration of selective serotonin reuptake inhibitor (SSRIs).[11][failed verification]
↑ Sanders AR, Cao Q, Taylor J, Levin TE, Badner JA, Cravchik A, etal. (Feb 2001). "Genetic diversity of the human serotonin receptor 1B (HTR1B) gene". Genomics. 72 (1): 1–14. doi:10.1006/geno.2000.6411. PMID11247661.
↑ Shoval G, Bar-Shira O, Zalsman G, John Mann J, Chechik G (Jul 2014). "Transitions in the transcriptome of the serotonergic and dopaminergic systems in the human brain during adolescence". European Neuropsychopharmacology. 24 (7): 1123–32. doi:10.1016/j.euroneuro.2014.02.009. PMID24721318. S2CID14534307.
↑ Martinez-Price D, Krebs-Thomson K, Geyer M (1 January 2002). "Behavioral Psychopharmacology of MDMA and MDMA-Like Drugs: A Review of Human and Animal Studies". Addiction Research & Theory. 10 (1). Informa UK Limited: 43–67. doi:10.1080/16066350290001704. ISSN1606-6359.
↑ Scearce-Levie K, Viswanathan SS, Hen R (January 1999). "Locomotor response to MDMA is attenuated in knockout mice lacking the 5-HT1B receptor". Psychopharmacology. 141 (2). Berlin: 154–161. doi:10.1007/s002130050819. PMID9952039.
↑ Nguyen L, Thomas KL, Lucke-Wold BP, Cavendish JZ, Crowe MS, Matsumoto RR (2016). "Dextromethorphan: An update on its utility for neurological and neuropsychiatric disorders". Pharmacol. Ther. 159: 1–22. doi:10.1016/j.pharmthera.2016.01.016. PMID26826604.
↑ Tsai SJ, Wang YC, Chen JY, Hong CJ (2003). "Allelic variants of the tryptophan hydroxylase (A218C) and serotonin 1B receptor (A-161T) and personality traits". Neuropsychobiology. 48 (2): 68–71. doi:10.1159/000072879. PMID14504413. S2CID42559772.
Further reading
Olivier B, van Oorschot R (Dec 2005). "5-HT1B receptors and aggression: a review". European Journal of Pharmacology. 526 (1–3): 207–17. doi:10.1016/j.ejphar.2005.09.066. PMID16310769.
Hamblin MW, Metcalf MA, McGuffin RW, Karpells S (Apr 1992). "Molecular cloning and functional characterization of a human 5-HT1B serotonin receptor: a homologue of the rat 5-HT1B receptor with 5-HT1D-like pharmacological specificity". Biochemical and Biophysical Research Communications. 184 (2): 752–9. doi:10.1016/0006-291X(92)90654-4. PMID1315531.
Veldman SA, Bienkowski MJ (Sep 1992). "Cloning and pharmacological characterization of a novel human 5-hydroxytryptamine1D receptor subtype". Molecular Pharmacology. 42 (3): 439–44. PMID1328844.
Mochizuki D, Yuyama Y, Tsujita R, Komaki H, Sagai H (Jun 1992). "Cloning and expression of the human 5-HT1B-type receptor gene". Biochemical and Biophysical Research Communications. 185 (2): 517–23. doi:10.1016/0006-291X(92)91655-A. PMID1610347.
Nöthen MM, Erdmann J, Shimron-Abarbanell D, Propping P (Dec 1994). "Identification of genetic variation in the human serotonin 1D beta receptor gene". Biochemical and Biophysical Research Communications. 205 (2): 1194–200. doi:10.1006/bbrc.1994.2792. PMID7802650.
Ng GY, George SR, Zastawny RL, Caron M, Bouvier M, Dennis M, etal. (Nov 1993). "Human serotonin1B receptor expression in Sf9 cells: phosphorylation, palmitoylation, and adenylyl cyclase inhibition". Biochemistry. 32 (43): 11727–33. doi:10.1021/bi00094a032. PMID8218242.
Bouchelet I, Cohen Z, Case B, Séguéla P, Hamel E (Aug 1996). "Differential expression of sumatriptan-sensitive 5-hydroxytryptamine receptors in human trigeminal ganglia and cerebral blood vessels". Molecular Pharmacology. 50 (2): 219–23. PMID8700126.
Varnäs K, Hall H, Bonaventure P, Sedvall G (Oct 2001). "Autoradiographic mapping of 5-HT(1B) and 5-HT(1D) receptors in the post mortem human brain using [(3)H]GR 125743". Brain Research. 915 (1): 47–57. doi:10.1016/S0006-8993(01)02823-2. PMID11578619. S2CID43104381.
Hasegawa Y, Higuchi S, Matsushita S, Miyaoka H (Apr 2002). "Association of a polymorphism of the serotonin 1B receptor gene and alcohol dependence with inactive aldehyde dehydrogenase-2". Journal of Neural Transmission. 109 (4): 513–21. doi:10.1007/s007020200042. PMID11956970. S2CID35750034.
Sinha R, Cloninger CR, Parsian A (Aug 2003). "Linkage disequilibrium and haplotype analysis between serotonin receptor 1B gene variations and subtypes of alcoholism". American Journal of Medical Genetics Part B. 121B (1): 83–8. doi:10.1002/ajmg.b.20064. PMID12898580. S2CID33460360.
External links
"5-HT1B". IUPHAR Database of Receptors and Ion Channels. International Union of Basic and Clinical Pharmacology.
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