This gene is a member of the family of human serotonin receptors, which are G protein-coupled receptors that stimulate cAMP production in response to serotonin (5-hydroxytryptamine). The gene product is a glycosylated transmembrane protein that functions in both the peripheral and central nervous system to modulate the release of various neurotransmitters. Multiple transcript variants encoding proteins with distinct C-terminal sequences have been described, but the full-length nature of some transcript variants has not been determined.
Several drugs that act as 5-HT4 selective agonists have recently been introduced into use in both scientific research and clinical medicine. Some drugs that act as 5-HT4 agonists are also active as 5-HT3 antagonists, such as mosapride, metoclopramide, renzapride, and zacopride, and so these compounds cannot be considered highly selective. Research in this area is ongoing.
^Mnie-Filali O, Amraei MG, Benmbarek S, Archer-Lahlou E, Peñas-Cazorla R, Vilaró MT, Boye SM, Piñeyro G (March 2010). "Serotonin 4 receptor (5-HT4R) internalization is isoform-specific: effects of 5-HT and RS67333 on isoforms A and B". Cellular Signalling. 22 (3): 501–9. doi:10.1016/j.cellsig.2009.11.004. PMID19922792.
^Godínez-Chaparro B, Barragán-Iglesias P, Castañeda-Corral G, Rocha-González HI, Granados-Soto V (March 2011). "Role of peripheral 5-HT(4), 5-HT(6), and 5-HT(7) receptors in development and maintenance of secondary mechanical allodynia and hyperalgesia". Pain. 152 (3): 687–97. doi:10.1016/j.pain.2010.12.020. PMID21239110. S2CID140204185.
^Simmen U, Kelber O, Okpanyi SN, Jaeggi R, Bueter B, Weiser D (2006). "Binding of STW 5 (Iberogast) and its components to intestinal 5-HT, muscarinic M3, and opioid receptors". Phytomedicine. 13 Suppl 5: 51–5. doi:10.1016/j.phymed.2006.03.012. PMID16973340.
Blondel O, Gastineau M, Dahmoune Y, Langlois M, Fischmeister R (June 1998). "Cloning, expression, and pharmacology of four human 5-hydroxytryptamine 4 receptor isoforms produced by alternative splicing in the carboxyl terminus". Journal of Neurochemistry. 70 (6): 2252–61. doi:10.1046/j.1471-4159.1998.70062252.x. PMID9603189. S2CID24203530.
Cichon S, Kesper K, Propping P, Nöthen MM (1998). "Assignment of the human serotonin 4 receptor gene (HTR4) to the long arm of chromosome 5 (5q31-q33)". Molecular Membrane Biology. 15 (2): 75–8. doi:10.3109/09687689809027521. PMID9724925.
Claeysen S, Sebben M, Becamel C, Bockaert J, Dumuis A (May 1999). "Novel brain-specific 5-HT4 receptor splice variants show marked constitutive activity: role of the C-terminal intracellular domain". Molecular Pharmacology. 55 (5): 910–20. PMID10220570.
Bach T, Syversveen T, Kvingedal AM, Krobert KA, Brattelid T, Kaumann AJ, Levy FO (February 2001). "5HT4(a) and 5-HT4(b) receptors have nearly identical pharmacology and are both expressed in human atrium and ventricle". Naunyn-Schmiedeberg's Archives of Pharmacology. 363 (2): 146–60. doi:10.1007/s002100000299. PMID11218067. S2CID27504006.
Medhurst AD, Lezoualc'h F, Fischmeister R, Middlemiss DN, Sanger GJ (June 2001). "Quantitative mRNA analysis of five C-terminal splice variants of the human 5-HT4 receptor in the central nervous system by TaqMan real time RT-PCR". Brain Research. Molecular Brain Research. 90 (2): 125–34. doi:10.1016/S0169-328X(01)00095-X. PMID11406291.
Hiroi T, Hayashi-Kobayashi N, Nagumo S, Ino M, Okawa Y, Aoba A, Matsui H (November 2001). "Identification and characterization of the human serotonin-4 receptor gene promoter". Biochemical and Biophysical Research Communications. 289 (2): 337–44. doi:10.1006/bbrc.2001.5979. PMID11716477.
Vilaró MT, Doménech T, Palacios JM, Mengod G (January 2002). "Cloning and characterization of a novel human 5-HT4 receptor variant that lacks the alternatively spliced carboxy terminal exon. RT-PCR distribution in human brain and periphery of multiple 5-HT4 receptor variants". Neuropharmacology. 42 (1): 60–73. doi:10.1016/S0028-3908(01)00154-X. hdl:10261/112650. PMID11750916. S2CID23722311.
López-Rodríguez ML, Murcia M, Benhamú B, Olivella M, Campillo M, Pardo L (November 2001). "Computational model of the complex between GR113808 and the 5-HT4 receptor guided by site-directed mutagenesis and the crystal structure of rhodopsin". Journal of Computer-Aided Molecular Design. 15 (11): 1025–33. Bibcode:2001JCAMD..15.1025L. doi:10.1023/A:1014895611874. PMID11989623. S2CID23478175.