5-HT1B receptor

Source: Wikipedia, the free encyclopedia.
HTR1B
Gene ontology
Molecular function
Cellular component
Biological process
Sources:Amigo / QuickGO
Ensembl
UniProt
RefSeq (mRNA)

NM_000863

NM_010482

RefSeq (protein)

NP_000854

NP_034612

Location (UCSC)Chr 6: 77.46 – 77.46 MbChr 9: 81.51 – 81.52 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

5-hydroxytryptamine receptor 1B also known as the 5-HT1B receptor is a protein that in humans is encoded by the HTR1B gene.[5][6] The 5-HT1B receptor is a 5-HT receptor subtype.[7]

Tissue distribution and function

5-HT1B receptors are widely distributed throughout 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-HT1B heteroreceptors 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]

Ligands

Agonists

Partial agonists

Antagonists and inverse agonists

Undetermined Action

Genetics

In humans the protein is coded by the gene HTR1B.

A genetic variant in the promoter region,

personality traits and showed no major effect.[20]

See also

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000135312Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000049511Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. PMID 1348246
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  7. ^ "Entrez Gene: HTR1B 5-hydroxytryptamine (serotonin) receptor 1B".
  8. ^ "5-hydroxytryptamine (serotonin) receptor 1B, G protein-coupled". Retrieved 23 Feb 2013.
  9. PMID 20945968
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  15. ^
    S2CID 25543069
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Further reading

External links

  • "5-HT1B". IUPHAR Database of Receptors and Ion Channels. International Union of Basic and Clinical Pharmacology.
  • Human HTR1B genome location and HTR1B gene details page in the UCSC Genome Browser.
  • Overview of all the structural information available in the PDB for UniProt: P28222 (5-hydroxytryptamine receptor 1B) at the PDBe-KB.

This article incorporates text from the United States National Library of Medicine, which is in the public domain.