Protein Information

Name serotonin receptor
Synonyms 5 hydroxytryptamine receptor 6; serotonin receptor; 5 HT 6; 5 HT6; 5 hydroxytryptamine (serotonin) receptor 6; 5 hydroxytryptamine 6 receptor; HTR 6; HTR6…

Compound Information

Name piperazine
CAS piperazine

Reference List

PubMed Abstract RScore(About this table)
12558977 Cobb WS, Abercrombie ED: Differential regulation of somatodendritic and nerve terminal dopamine release by serotonergic innervation of substantia nigra. J Neurochem. 2003 Feb;84(3):576-84.

The non-selective serotonin receptor agonist 1-(m-chlorophenyl)-piperazine (100 micro m) elicited a similar pattern of dopamine release in substantia nigra and striatum.
81(1,1,1,1) Details
11800033 Tierney AJ, Mangiamele LA: Effects of serotonin and serotonin analogs on posture and agonistic behavior in crayfish. J Comp Physiol A. 2001 Dec;187(10):757-67.

In our second experiment, we tested serotonin and four serotonin receptor agonists [1-(3-chlorophenyl) piperazine dihydrochloride, 2-methyl-5-hydroxytryptamine maleate, 5-carboxamidotryptamine maleate and alpha-methyl-5-hydroxytryptamine maleate] and measured the ability of each agonist to mimic the actions of the amine.
81(1,1,1,1) Details
15745826 Lee M, Rangisetty JB, Pullagurla MR, Dukat M, Setola V, Roth BL, Glennon RA: 1-(1-Naphthyl) piperazine as a novel template for 5-HT6 serotonin receptor ligands. Bioorg Med Chem Lett. 2005 Mar 15;15(6):1707-11.

4-Sulfonyl analogs of 1-(1-naphthyl) piperazine bind at human 5-HT6 receptors and represent a novel class of human 5-HT6 receptor ligands.
112(1,2,2,2) Details
14730096 Boksa J, Charakchieva-Minol S, Duszynska B, Bugno R, Klodzinska A, Tatarczynska E, Chojnacka-Wojcik E, Bojarski AJ: Synthesis, in vitro and in vivo 5-HT1A/5-HT2A serotonin receptor activity of new hybrid 1,2,3,4-tetrahydro-gamma-carbolines with 1-(2-methoxyphenyl) piperazine moiety. Pol J Pharmacol. 2003 Nov-Dec;55(6):1013-9.
31(0,1,1,1) Details
20078106 de la Fuente T, Martin-Fontecha M, Sallander J, Benhamu B, Campillo M, Medina RA, Pellissier LP, Claeysen S, Dumuis A, Pardo L, Lopez-Rodriguez ML: Benzimidazole derivatives as new serotonin 5-HT6 receptor antagonists. J Med Chem. 2010 Feb 11;53(3):1357-69.

Thus, we propose that D3.32 in TM 3 anchors the protonated piperazine ring, the benzimidazole ring expands parallel to EL 2 to hydrogen bond N6.55 in TM 6, and the aromatic ring is placed between TMs 3 and 5 in CH (2)-containing compounds and between TMs 3 and 6 in CO-containing compounds.
4(0,0,0,4) Details
11167306 Dwyer D, Browning J: Endurance training in Wistar rats decreases receptor sensitivity to a serotonin agonist. Acta Physiol Scand. 2000 Nov;170(3):211-6.


Serotonin receptor sensitivity is likely to be an important determinant of this fatigue.
3(0,0,0,3) Details
12119448 Sandrini M, Vitale G, Pini LA: Central antinociceptive activity of acetylsalicylic acid is modulated by brain serotonin receptor subtypes. Pharmacology. 2002 Aug;65(4):193-7.

2(0,0,0,2) Details
11347881 Van Craenenbroeck E, Vercammen J, Matthys G, Beirlant J, Marot C, Hoebeke J, Strobbe R, Engelborghs Y: Heuristic statistical analysis of fluorescence fluctuation data with bright spikes: application to ligand binding to the human serotonin receptor expressed in Escherichia coli cells. Biol Chem. 2001 Mar;382(3):355-61.

2(0,0,0,2) Details
18778728 Khorana N, Young R, Glennon RA: Effect of 8-hydroxy-2-(N,N-di-n-propylamino) tetralin and MDMA on the discriminative stimulus effects of the classical hallucinogen DOM in rats. Pharmacol Biochem Behav. 2009 Jan;91(3):385-92. Epub 2008 Aug 17.


Co-administration of the 5-HT1A serotonin receptor agonist (+/-) 8-hydroxy-2-(N,N-di-n-propylamino) tetralin [(+/-) 8-OH DPAT] enhances the discriminative stimulus effects of the classical hallucinogen 1-(2,5-dimethoxy-4-methylphenyl)-2-aminopropane (DOM) in rats.
2(0,0,0,2) Details
15467976 Feuchtl A, Bagli M, Stephan R, Frahnert C, Kolsch H, Kuhn KU, Rao ML: Pharmacokinetics of m-chlorophenylpiperazine after intravenous and oral administration in healthy male volunteers: implication for the pharmacodynamic profile. Pharmacopsychiatry. 2004 Jul;37(4):180-8.


Seven different major serotonin receptor subtypes have been described.
2(0,0,0,2) Details
12231467 Arjona AA, Pooler AM, Lee RK, Wurtman RJ: Effect of a 5-HT (2C) serotonin agonist, dexnorfenfluramine, on amyloid precursor protein metabolism in guinea pigs. Brain Res. 2002 Sep 27;951(1):135-40.

Chronic administration of mCPP (1-(m-chlorophenyl) piperazine) (2 mg/kg bid, i.p.), a 5-HT (2B/2C) agonist, for 9 days also increased CSF APP (s) levels (P <0.5) when measured 2 h after the drug's last administration; hippocampal and cortical APP (h) levels were unaffected.
Stimulation of serotonin receptor subtypes 5-HT (2A) or 5-HT (2C) in stably transfected 3T3 cells by dexnorfenfluramine (DEXNOR) or serotonin increases secretion of the APP metabolite APP (s).
1(0,0,0,1) Details
17691920 Caccia S: N-dealkylation of arylpiperazine derivatives: disposition and metabolism of the 1-aryl-piperazines formed. Curr Drug Metab. 2007 Aug;8(6):612-22.

These metabolites are best known for the variety of serotonin receptor-related effects they cause in man and animals, although some have affinity for other neurotransmitter receptors; others, however, are still largely unexplored despite uncontrolled use as amphetamine-like designer drugs.
Once formed they distribute extensively in tissues, including brain which is the target site of most arylpiperazine derivatives, and are then primarily biotransformed by CYP2D6-dependent oxidation to hydroxylates which are excreted as conjugates; only 1-(2-benzisothiazolyl)-piperazine is more susceptible to sulfur oxidation than to aromatic hydroxylation.
1(0,0,0,1) Details
11906967 Centurion D, Ortiz MI, Saxena PR, Villalon CM: The atypical 5-HT2 receptor mediating tachycardia in pithed rats: pharmacological correlation with the 5-HT2A receptor subtype. Br J Pharmacol. 2002 Mar;135(6):1531-9.

Remarkably, these responses were unaffected by the antagonists rauwolscine (5-HT (2B)), SB204741 (5-HT (2B/2C)) or Ro 04-6790 (5-ht (6)) (300 and 1000 microg kg (-1) each). 4.
In pithed rats, intraperitoneally (i.p.) pre-treated with reserpine (5 mg kg (-1)), intravenous (i.v.) administration of 5-HT, 5-methoxytryptamine (5-MeO-T), 1-(3-chlorophenyl) piperazine (mCPP) and 5-carboxamidotryptamine (5-CT) (10, 30, 100 and 300 microg kg (-1) each), produced dose-dependent tachycardic responses.
1(0,0,0,1) Details
18762217 Lam DD, Zhou L, Vegge A, Xiu PY, Christensen BT, Osundiji MA, Yueh CY, Evans ML, Heisler LK: Distribution and neurochemical characterization of neurons within the nucleus of the solitary tract responsive to serotonin agonist-induced hypophagia. Behav Brain Res. 2009 Jan 3;196(1):139-43. Epub 2008 Aug 13.


Here we investigated whether the classic anorectic serotonin receptor agonist m-chloro-phenylpiperazine (mCPP) enhances the activity of metabolically sensitive NTS neurons.
2(0,0,0,2) Details
17892934 Tasler S, Kraus J, Wuzik A, Muller O, Aschenbrenner A, Cubero E, Pascual R, Quintana-Ruiz JR, Dordal A, Merce R, Codony X: Discovery of 5-HT6 receptor ligands based on virtual HTS. . Bioorg Med Chem Lett. 2007 Nov 15;17(22):6224-9. Epub 2007 Sep 8.

2(0,0,0,2) Details
15582454 Chu W, Tu Z, McElveen E, Xu J, Taylor M, Luedtke RR, Mach RH: Synthesis and in vitro binding of N-phenyl piperazine analogs as potential dopamine D3 receptor ligands. Bioorg Med Chem. 2005 Jan 3;13(1):77-87.

Binding studies were also conducted to determine if the compounds bound to sigma (sigma (1) and sigma (2)) and serotonin (5-HT (1A), 5-HT (2A), 5-HT (2B), 5-HT (2C), 5-HT (3), 5-HT (4), 5-HT (5), 5-HT (6), and 5-HT (7)) receptors.
1(0,0,0,1) Details
11965359 Popova NK, Amstislavskaya TG: Involvement of the 5-HT (1A) and 5-HT (1B) serotonergic receptor subtypes in sexual arousal in male mice. Psychoneuroendocrinology. 2002 Jul;27(5):609-18.


Treatment with the selective 5-HT (1A) serotonin receptor agonist 8-OH-DPAT (0.1, 0.25, 0.5 and 2.0 mg/kg) induced a dose-dependent decrease in the amount of time spent by the males near the partition, or "partition time", which is considered the main pattern of sexual motivation.
1(0,0,0,1) Details
18456500 Yoon J, Yoo EA, Kim JY, Pae AN, Rhim H, Park WK, Kong JY, Park Choo HY: Preparation of piperazine derivatives as 5-HT7 receptor antagonists. . Bioorg Med Chem. 2008 May 15;16(10):5405-12. Epub 2008 Apr 15.

Among the synthesized compounds, 3c showed a good activity on 5-HT (7) receptors and a good selectivity on 5-HT (1a), 5-HT (2a), 5-HT (2c), and 5-HT (6) receptors.
1(0,0,0,1) Details
16307611 Guitton MJ, Pujol R, Puel JL: m-Chlorophenylpiperazine exacerbates perception of salicylate-induced tinnitus in rats. Eur J Neurosci. 2005 Nov;22(10):2675-8.


The serotonin receptor 5-HT2c agonist m-chlorophenylpiperazine (mCPP) has been widely used to induce anxiety-like states in animals and anxiety in humans.
1(0,0,0,1) Details
14996544 Dalton GL, Lee MD, Kennett GA, Dourish CT, Clifton PG: mCPP-induced hyperactivity in 5-HT2C receptor mutant mice is mediated by activation of multiple 5-HT receptor subtypes. Neuropharmacology. 2004 Apr;46(5):663-71.


The serotonin receptor agonist mCPP induces hyperlocomotion in 5-HT2C receptor knockout (KO) mice or in the presence of a 5-HT2C receptor antagonist.
1(0,0,0,1) Details
17284006 O'Connor NA, Paisner DA, Huryn D, Shea KJ: Screening of 5-HT1A receptor antagonists using molecularly imprinted polymers. J Am Chem Soc. 2007 Feb 14;129(6):1680-9.


The resulting MIP P (WAY) was evaluated as an affinity matrix in the screening of serotonin receptor antagonists with known affinities for the native receptor.
1(0,0,0,1) Details
11989808 Chilmonczyk Z, Cybulski M, Iskra-Jopa J, Chojnacka-Wojcik E, Tatarczynska E, Klodzinska A, Les A, Bronowska A, Sylte I: Interaction of 1,2,4-substituted piperazines, new serotonin receptor ligands, with 5-HT1A and 5-HT2A receptors. Farmaco. 2002 Apr;57(4):285-301.

In the present paper, we describe affinities to 5-HT1A and 5-HT2A receptors of several new 1,2,4-trisubstituted piperazine derivatives.
1(0,0,0,1) Details
11167653 Testa R, Guarneri L, Angelico P, Velasco C, Poggesi E, Cilia A, Leonardi A: Effect of different 5-hydroxytryptamine receptor subtype antagonists on the micturition reflex in rats. BJU Int. 2001 Feb;87(3):256-64.


The tested antagonists of 5-HT2, 5-HT3, 5-HT4, and 5-HT6 serotoninergic subtypes were poorly active or inactive in the model.
1(0,0,0,1) Details
18598015 Siracusa MA, Salerno L, Modica MN, Pittala V, Romeo G, Amato ME, Nowak M, Bojarski AJ, Mereghetti I, Cagnotto A, Mennini T: Synthesis of new arylpiperazinylalkylthiobenzimidazole, benzothiazole, or benzoxazole derivatives as potent and selective 5-HT1A serotonin receptor ligands. J Med Chem. 2008 Aug 14;51(15):4529-38. Epub 2008 Jul 4.

1(0,0,0,1) Details
15113845 Schlag BD, Lou Z, Fennell M, Dunlop J: Ligand dependency of 5-hydroxytryptamine 2C receptor internalization. J Pharmacol Exp Ther. 2004 Sep;310(3):865-70. Epub 2004 Apr 27.

The 5-hydroxytryptamine (5-HT) 2C subtype of serotonin receptor is a GPCR that we have shown to internalize upon agonist incubation.
In this study, we have examined the effects of 5-HT2C receptor agonists serotonin, Ro 60-0175 [(S)-2-(6-chloro-5-fluoroindol-1-yl)-1-methylethylamine], and WAY-161503 [(4aR)-8,9-dichloro-2,3,4,4a-tetrahydro-1H-pyrazino [1,2-a] quinoxalin-5 (6H) -one]; partial agonists mCPP [1-(m-chlorophenyl) piperazine] and DOI [(+)-1-(2,5-dimethoxy-4-iodophenyl)-2-amino-propane]; inverse agonists SB-206553 [N-3-pyridinyl-3,5-dihydro-5-methylbenzo (1,2-b:4,5-b') dipyrrole-1 (2H) carbo xamide] and mianserin; and neutral antagonists SB-242084 [6-chloro-5-methyl-1-[[2-[(2-methyl-3-pyridyl) oxy]-5-pyridyl] carbamoyl]-in doline] and 5-methoxygramine on the internalization of a C-terminal green fluorescent protein (GFP)-tagged 5-HT2C receptor (VSV isoform) expressed in transiently transfected human embryonic kidney cells.
1(0,0,0,1) Details
11259531 McKune CM, Watts SW: Characterization of the serotonin receptor mediating contraction in the mouse thoracic aorta and signal pathway coupling. J Pharmacol Exp Ther. 2001 Apr;297(1):88-95.

Our hypothesis was further supported by the finding that antagonists with affinity for the 5-HT2A receptor, ketanserin, 1-(1-naphthyl) piperazine, spiperone, and LY53857, reduced 5-HT-induced contraction.
1(0,0,0,1) Details
15374751 Dias Elpo Zomkowski A, Oscar Rosa A, Lin J, Santos AR, Calixto JB, Lucia Severo Rodrigues A: Evidence for serotonin receptor subtypes involvement in agmatine antidepressant like-effect in the mouse forced swimming test. Brain Res. 2004 Oct 15;1023(2):253-63.

Pretreatment with p-chlorophenylalanine methyl ester (PCPA; 100 mg/kg, intraperitoneally (i.p.), an inhibitor of serotonin synthesis, for 4 consecutive days), methysergide (5 mg/kg, i.p., a serotonin (5-HT) antagonist), pindolol (32 mg/kg, i.p., a 5-HT (1A/1B) receptor/beta-adrenoceptor antagonist), N-[2-[4-(2-methoxyphenyl)-1-piperazinyl] ethyl]-N-(2-pyridynyl) cyclohexanec arboxamide (WAY 100635; 0.3 mg/kg, subcutaneously (s.c.), a selective 5-HT (1A) receptor antagonist), 1-(2-methoxyphenyl)-4 [-(2-phthalimido) butyl] piperazine) (NAN-190; 0.5 mg/kg, i.p., a 5-HT (1A) receptor antagonist), 1-(2-(1-pyrrolyl)-phenoxy)-3-isopropylamino-2-propanol (isamoltane; 2.5 mg/kg, i.p., a 5-HT (1B) receptor antagonist), cyproheptadine (3 mg/kg, i.p., a 5-HT (2) antagonist) or ketanserin (5 mg/kg, i.p., a 5-HT (2A/2C) receptor antagonist), but not with propranolol (2 mg/kg, i.p., a beta-adrenoceptor antagonist), prevented the effect of agmatine (10 mg/kg, i.p.) in the FST.
1(0,0,0,1) Details
11311404 Yonehara N: Influence of serotonin receptor antagonists on substance P and serotonin release evoked by tooth pulp stimulation with electro-acupuncture in the trigeminal nucleus cudalis of the rabbit. Neurosci Res. 2001 May;40(1):45-51.

1(0,0,0,1) Details
12850497 Gatch MB: Discriminative stimulus effects of m-chlorophenylpiperazine as a model of the role of serotonin receptors in anxiety. Life Sci. 2003 Aug 1;73(11):1347-67.


The roles of serotonin reuptake and 5-HT1A receptors have been well characterized, but the contribution of other serotonin receptor subtypes is not as clear. 1-(3-Chlorophenyl)-piperazine (mCPP), which binds non-selectively to a wide range of serotonin receptors, has often been used to produce anxiety in humans and in animal models.
0(0,0,0,0) Details
16710314 McCreary AC, Glennon JC, Ashby CR Jr, Meltzer HY, Li Z, Reinders JH, Hesselink MB, Long SK, Herremans AH, van Stuivenberg H, Feenstra RW, Kruse CG: SLV313 (1-(2,3-dihydro-benzo [1,4] dioxin-5-yl)-4- [5-(4-fluoro-phenyl)-pyridin-3-ylmethyl]-piperazine monohydrochloride): a novel dopamine D2 receptor antagonist and 5-HT1A receptor agonist potential antipsychotic drug. Neuropsychopharmacology. 2007 Jan;32(1):78-94. Epub 2006 May 17.

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