5-Methoxytryptamine

5-Methoxytryptamine
Clinical data
Other names	5-MT; Mexamine
Drug class	Serotonin receptor agonist
Identifiers
	IUPAC name 2-(5-Methoxy-1H-indol-3-yl)ethanamine;
CAS Number	608-07-1 ;
PubChem CID	1833;
IUPHAR/BPS	107;
ChemSpider	1767 ;
UNII	3VMW6141KC;
KEGG	C05659 ;
ChEBI	CHEBI:2089 ;
ChEMBL	ChEMBL8165 ;
CompTox Dashboard (EPA)	DTXSID60209638 ;
ECHA InfoCard	100.009.231
Chemical and physical data
Formula	C11H14N2O
Molar mass	190.246 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES O(c1cc2c(cc1)[nH]cc2CCN)C;
	InChI InChI=1S/C11H14N2O/c1-14-9-2-3-11-10(6-9)8(4-5-12)7-13-11/h2-3,6-7,13H,4-5,12H2,1H3 ; Key:JTEJPPKMYBDEMY-UHFFFAOYSA-N ;
	(verify)

5-Methoxytryptamine (5-MT), also known as mexamine, is a tryptamine derivative closely related to the neurotransmitters serotonin and melatonin. 5-MT has been shown to occur naturally in the body in low levels.^[1] It is formed via the deacetylation of melatonin in the pineal gland.^[1]

Pharmacology

Pharmacodynamics

5-MT acts as a full agonist of the serotonin 5-HT₁, 5-HT₂, 5-HT₄, 5-HT₆, and 5-HT₇ receptors.^[2]^[3]^[4]^[5]^[6]^[7]^[8] It has no affinity for the 5-HT₃ receptor and its affinity for the 5-HT_1E receptor is very weak in comparison to the other 5-HT₁ receptors.^[5]^[9] Its affinity for the 5-HT_5A receptor is unknown.^{[citation needed]}

Measured affinity for some receptors (incomplete list):

5-HT_1B receptors (K_i = 35 nM) ^[10]
5-HT_1D receptors (K_i = 7.3 nM)^[11]
5-HT_1E receptors (K_i = 3151 nM)^[12]
5-HT_1F receptors (K_i = 1166 nM)^[13]
5-HT_2A receptors (K_i = 295 nM)^[14]
5-HT_2B receptors (K_i = 16.4 nM)^[15]
5-HT_2C receptors (K_i = 52.48 nM) ^[16]
5-HT₄ receptors (K_i = 501.18 nM)^[17]
5-HT₆ receptors (K_i = 69.18 nM)^[18]
5-HT₇ receptors (K_i = 5.01 nM)^[19]

References

^ ^a ^b Galzin AM, Eon MT, Esnaud H, Lee CR, Pévet P, Langer SZ (1988). "Day-night rhythm of 5-methoxytryptamine biosynthesis in the pineal gland of the golden hamster (Mesocricetus auratus)". J. Endocrinol. 118 (3): 389–397. doi:10.1677/joe.0.1180389. PMID 2460575.
^ Wu PH, Gurevich N, Carlen PL (1988). "Serotonin-1A receptor activation in hippocampal CA1 neurons by 8-hydroxy-2-(di-n-propylamino)tetralin, 5-methoxytryptamine and 5-hydroxytryptamine". Neurosci. Lett. 86 (1): 72–76. doi:10.1016/0304-3940(88)90185-1. PMID 2966313. S2CID 21620262.
^ Yamada J, Sugimoto Y, Yoshikawa T, Horisaka K (1997). "Hyperglycemia induced by the 5-HT receptor agonist, 5-methoxytryptamine, in rats: involvement of the peripheral 5-HT2A receptor". Eur J Pharmacol. 323 (2–3): 235–240. doi:10.1016/S0014-2999(97)00029-0. PMID 9128844.
^ Amemiya N, Hatta S, Takemura H, Ohshika H (1996). "Characterization of the contractile response induced by 5-methoxytryptamine in rat stomach fundus strips". Eur J Pharmacol. 318 (2–3): 403–409. doi:10.1016/S0014-2999(96)00777-7. PMID 9016931.
^ ^a ^b Craig DA, Eglen RM, Walsh LK, Perkins LA, Whiting RL, Clarke DE (1990). "5-Methoxytryptamine and 2-methyl-5-hydroxytryptamine-induced desensitization as a discriminative tool for the 5-HT3 and putative 5-HT4 receptors in guinea pig ileum". Naunyn-Schmiedeberg's Arch Pharmacol. 342 (1): 9–16. doi:10.1007/bf00178965. PMID 2402303. S2CID 24743785.
^ Boess FG, Monsma Jr FJ, Carolo C, Meyer V, Rudler A, Zwingelstein C, Sleight AJ (1997). "Functional and radioligand binding characterization of rat 5-HT6 receptors stably expressed in HEK293 cells". Neuropharmacology. 36 (4–5): 713–720. doi:10.1016/S0028-3908(97)00019-1. PMID 9225298. S2CID 41813873.
^ Hemedah M, Coupar IM, Mitchelson FJ (1999). "[3H]-Mesulergine labels 5-HT7 sites in rat brain and guinea-pig ileum but not rat jejunum". Br J Pharmacol. 126 (1): 179–188. doi:10.1038/sj.bjp.0702293. PMC 1565797. PMID 10051134.
^ Glennon RA, Dukat M, Westkaemper RB (2000-01-01). "Serotonin Receptor Subtypes and Ligands". American College of Neurophyscopharmacology. Archived from the original on 21 April 2008. Retrieved 2008-04-11.
^ Roth, Brian (2006). The serotonin receptors. Humana Press. p. 133. ISBN 978-1-58829-568-2.
^ S. Nigra / Domenech T, et al., 1997
^ Cortex / PEROUTKA ET AL., 1989
^ Cloned / ZGOMBICK JM, ET AL., 1992
^ Cloned / Adham N, et al., 1992
^ Cortex / HOYER ET AL., 1987
^ Cortex / WAINSCOTT DB, ET AL., 1996
^ Cloned / BONHAUS DW, ET AL., 1997
^ Caudate / ANSANAY H, ET AL.,1996
^ Cloned / Hirst WD, et.al.,2003
^ Cloned / BOESS FG, ET AL., 1994

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[pmid2460575-1] Galzin AM, Eon MT, Esnaud H, Lee CR, Pévet P, Langer SZ (1988). "Day-night rhythm of 5-methoxytryptamine biosynthesis in the pineal gland of the golden hamster (Mesocricetus auratus)". J. Endocrinol. 118 (3): 389–397. doi:10.1677/joe.0.1180389. PMID 2460575.

[pmid2966313-2] Wu PH, Gurevich N, Carlen PL (1988). "Serotonin-1A receptor activation in hippocampal CA1 neurons by 8-hydroxy-2-(di-n-propylamino)tetralin, 5-methoxytryptamine and 5-hydroxytryptamine". Neurosci. Lett. 86 (1): 72–76. doi:10.1016/0304-3940(88)90185-1. PMID 2966313. S2CID 21620262.

[pmid9128844-3] Yamada J, Sugimoto Y, Yoshikawa T, Horisaka K (1997). "Hyperglycemia induced by the 5-HT receptor agonist, 5-methoxytryptamine, in rats: involvement of the peripheral 5-HT2A receptor". Eur J Pharmacol. 323 (2–3): 235–240. doi:10.1016/S0014-2999(97)00029-0. PMID 9128844.

[pmid9016931-4] Amemiya N, Hatta S, Takemura H, Ohshika H (1996). "Characterization of the contractile response induced by 5-methoxytryptamine in rat stomach fundus strips". Eur J Pharmacol. 318 (2–3): 403–409. doi:10.1016/S0014-2999(96)00777-7. PMID 9016931.

[pmid2402303-5] Craig DA, Eglen RM, Walsh LK, Perkins LA, Whiting RL, Clarke DE (1990). "5-Methoxytryptamine and 2-methyl-5-hydroxytryptamine-induced desensitization as a discriminative tool for the 5-HT3 and putative 5-HT4 receptors in guinea pig ileum". Naunyn-Schmiedeberg's Arch Pharmacol. 342 (1): 9–16. doi:10.1007/bf00178965. PMID 2402303. S2CID 24743785.

[pmid9225298-6] Boess FG, Monsma Jr FJ, Carolo C, Meyer V, Rudler A, Zwingelstein C, Sleight AJ (1997). "Functional and radioligand binding characterization of rat 5-HT6 receptors stably expressed in HEK293 cells". Neuropharmacology. 36 (4–5): 713–720. doi:10.1016/S0028-3908(97)00019-1. PMID 9225298. S2CID 41813873.

[pmid10051134-7] Hemedah M, Coupar IM, Mitchelson FJ (1999). "[3H]-Mesulergine labels 5-HT7 sites in rat brain and guinea-pig ileum but not rat jejunum". Br J Pharmacol. 126 (1): 179–188. doi:10.1038/sj.bjp.0702293. PMC 1565797. PMID 10051134.

[urlSerotonin_Receptor_Subtypes_and_Ligands-8] Glennon RA, Dukat M, Westkaemper RB (2000-01-01). "Serotonin Receptor Subtypes and Ligands". American College of Neurophyscopharmacology. Archived from the original on 21 April 2008. Retrieved 2008-04-11.

[bookThe_Serotonin_Receptors-9] Roth, Brian (2006). The serotonin receptors. Humana Press. p. 133. ISBN 978-1-58829-568-2.

[Domenech-10] S. Nigra / Domenech T, et al., 1997

[PEROUTKA-11] Cortex / PEROUTKA ET AL., 1989

[ZGOMBICK-12] Cloned / ZGOMBICK JM, ET AL., 1992

[Adham-13] Cloned / Adham N, et al., 1992

[HOYER-14] Cortex / HOYER ET AL., 1987

[WAINSCOTT-15] Cortex / WAINSCOTT DB, ET AL., 1996

[BONHAUS-16] Cloned / BONHAUS DW, ET AL., 1997

[ANSANAY-17] Caudate / ANSANAY H, ET AL.,1996

[Hirst-18] Cloned / Hirst WD, et.al.,2003

[BOESS-19] Cloned / BOESS FG, ET AL., 1994

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v t e Tryptamines
Tryptamines	1-Methylpsilocin 2-HO-NMT 2-Me-DET 2-Methyl-5-HT 2,N,N-TMT 4,5-DHP-DMT 4-AcO-DALT 4-AcO-DET 4-AcO-DiPT 4-AcO-DPT 4-AcO-EPT 4-AcO-MALT 4-AcO-MET 4-AcO-MiPT 4-AcO-NMT 4-AcO-TMT 4-F-5-MeO-DMT 4-HO-5-MeO-DMT 4-HO-DALT 4-HO-DBT 4-HO-DET 4-HO-DiPT 4-HO-DPT 4-HO-DSBT 4-HO-EPT 4-HO-MALT 4-HO-MET 4-HO-McPT 4-HO-McPeT 4-HO-MiPT 4-HO-MPT 4-HO-MsBT 4-HO-NALT 4-HO-NMT 4-HO-PiPT 4-HO-pyr-T 4-HO-TMT 4-HT 4-MeO-DiPT 4-MeO-DMT 4-MeO-MiPT 4-PrO-DMT 4,5-MDO-DMT 4,5-MDO-DiPT 5-BT 5-Bromo-DMT 5-CT 5-Chloro-DMT 5-Ethoxy-DMT 5-Ethyl-DMT 5-Fluoro-DET 5-Fluoro-DMT 5-Fluoro-EPT 5-Fluoro-MET 5-HO-DiPT 5-HTP (oxitriptan) 5-MeO-2-TMT 5-MeO-34MPEMT 5-MeO-7,N,N-TMT 5-MeO-DALT 5-MeO-DBT 5-MeO-DET 5-MeO-DiPT 5-MeO-DMT 5-MeO-DPT 5-MeO-EiPT 5-MeO-EPT 5-MeO-MALT 5-MeO-MET 5-MeO-MiPT 5-MeO-NMT 5-MeO-pyr-T 5-MeO-NBpBrT 5-MeO-T-NBOMe 5-MeS-DMT 5-Methoxytryptamine (5-MT; mexamine) 5-Methyl-DMT 5-Methyltryptamine 5-MT-NB3OMe 5-(Nonyloxy)tryptamine 5,6-MeO-MiPT 5,6-MDO-DiPT 5,6-MDO-DMT 5,6-MDO-MiPT 5,6-DHT 5,7-DHT 6-Fluoro-DMT 6-MeO-DMT 7-Methyl-DMT Acetryptine (5-AT) Aeruginascin (4-PO-TMT) AGH-107 AGH-192 AH-494 ALiPT Alpertine Baeocystin (4-PO-NMT) Benzotript (4-chlorobenzoyl-L-tryptophan) Bufotenidine (5-HTQ) Bufotenin (5-HO-DMT) Convolutindole A CP-132,484 DALT DBT Desformylflustrabromine DET DiPT DMT DPT E-6801 E-6837 EiPT EMDT EPT Ethocybin (4-PO-DET) FGIN-127 FGIN-143 FT-104 HIOC Idalopirdine Indolylethylfentanyl Indorenate Iprocin (4-HO-DiPT) Lespedamine MET Methylbutyltryptamine Miprocin (4-HO-MiPT) MiPT MPT Milipertine MS-245 MSBT N-Feruloylserotonin (moschamine) NET NMT Norbaeocystin (4-PO-T) NTBT O-4310 O-Pivalylbufotenine Oxypertine PiPT Psilacetin (O-acetylpsilocin; 4-AcO-DMT) Psilocin (4-HO-DMT) Psilocybin (4-PO-DMT) Pyr-T RS134-49 Serotonin (5-HT) Solypertine ST-1936 Tryptamine Tryptophan Yuremamine Z2876442907
N-Acetyltryptamines	2-Iodomelatonin 2-Phenylmelatonin 5-Methoxyluzindole 6-Chloromelatonin 6-Fluoromelatonin 6-Hydroxymelatonin 6-Methoxymelatonin 6,7-Dichloro-2-methylmelatonin α-Methylmelatonin Luzindole Melatonin Normelatonin (N-acetylserotonin; NAS) N-Acetyltryptamine N-Butanoylmelatonin N-Propionylmelatonin Piromelatine TIK-301
α-Alkyltryptamines	2,α-DMT 4-HO-αMT 4-HO-MPMI (lucigenol) 4-Me-αET 4-Me-αMT 5-Chloro-αMT 5-Ethoxy-αMT 5-Fluoro-αET 5-Fluoro-αMT 5-iPrO-αMT 5-MeO-αET 5-MeO-αMT 5-MeO-MPMI 5-Methyl-αET 6-Fluoro-αMT 7-Chloro-αMT 7-Methyl-αET α-Methyl-5-HTP α-Methylmelatonin α-Methylserotonin (5-HO-αMT) α-Methyltryptophan (αMTP) α,N-DMT (N-methyl-αMT) α,N,N-TMT α,N,O-TMS αET (etryptamine) αMT AL-37350A (4,5-DHP-αMT) BNC-210 BW-723C86 CP-135807 IPAP (α,N-DPT) MPMI
Triptans	Almotriptan Donitriptan Eletriptan Frovatriptan L-694247 Rizatriptan Sumatriptan Zolmitriptan
Cyclized tryptamines	Bay R 1531 Ciclindole Cyclic 3-OHM Ergolines and lysergamides (e.g., LSD) Flucindole Harmala alkaloids and β-carbolines (e.g., 6-MeO-THH, 9-Me-BC, β-carboline (norharman), harmaline, harmalol, harmane, harmine, pinoline, tetrahydroharmine, tryptoline) Iboga alkaloids and related (e.g., DM-506 (ibogaminalog), ibogaine, ibogamine, noribogaine, tabernanthalog, tabernanthine) Metralindole NDTDI PHA-57378 PNU-22394 PNU-181731 RU-28306 Yohimbans (e.g., yohimbine, rauwolscine, spegatrine, corynanthine, ajmalicine, reserpine, deserpidine, rescinnamine)
Related compounds	2-Azapsilocin 4-Aza-5-MeO-DPT 5-Aza-4-MeO-DiPT 5-HIAL 5-HITCA 5-MIAL 7-Aza-5-MeO-DiPT AAZ-A-154 AL-34662 AL-38022A BRL-54443 CP-94253 EMD-386088 I-32 IAL Latrepirdine LY-367265 Pirlindole (R)-69 (3IQ) Ro60-0175 Ro60-0213 RU-24,969 Sertindole SN-22 Substituted benzofurans (e.g., 3-APB, 5-MeO-DiBF, BPAP, dimemebfe, mebfap) Tepirindole Tetrindole Triptans (e.g., avitriptan, LY-334370, naratriptan) VER-3323 VU6067416 YM-348

Pharmacology

Pharmacodynamics

See also

References