Protein Information

Name CYP2D6
Synonyms CPD 6; Xenobiotic monooxygenase; Microsomal monooxygenase; Flavoprotein linked monooxygenase; CPD6; CYP2D; CYP2D variant; CYP2D6…

Compound Information

Name piperazine
CAS piperazine

Reference List

PubMed Abstract RScore(About this table)
15507542 Raghavan N, Zhang D, Zhu M, Zeng J, Christopher L: Cyp2D6 catalyzes 5-hydroxylation of 1-(2-pyrimidinyl)-piperazine, an active metabolite of several psychoactive drugs, in human liver microsomes. Drug Metab Dispos. 2005 Feb;33(2):203-8. Epub 2004 Oct 26.
86(1,1,1,6) Details
14967005 Hutzler JM, Steenwyk RC, Smith EB, Walker GS, Wienkers LC: Mechanism-based inactivation of cytochrome P450 2D6 by 1-[(2-ethyl-4-methyl-1H-imidazol-5-yl) methyl]- 4-[4-(trifluoromethyl)-2-pyridinyl] piperazine: kinetic characterization and evidence for apoprotein adduction. Chem Res Toxicol. 2004 Feb;17(2):174-84.
62(0,2,2,2) Details
19589229 Antia U, Tingle MD, Russell BR: Metabolic interactions with piperazine-based 'party pill' drugs. J Pharm Pharmacol. 2009 Jul;61(7):877-82.

CONCLUSIONS: Fluorophenylpiperazine, methoxyphenylpiperazine, chlorophenylpiperazine, methylbenzylpiperazine and methylenedioxybenzylpiperazine had significant inhibitory effects on CYP2D6, CYP1A2, CYP3A4, CYP2C19 and CYP2C9 isoenzymes but each piperazine had a different inhibitory profile.
32(0,1,1,2) Details
12619053 Greenblatt DJ, Von Moltke LL, Giancarlo GM, Garteiz DA: Human cytochromes mediating gepirone biotransformation at low substrate concentrations. Biopharm Drug Dispos. 2003 Mar;24(2):87-94.

Biotransformation of gepirone to 1-(2-pyrimidinyl)-piperazine (1-PP) and 3'-OH-gepirone, as well as two other hydroxylated metabolites, was studied in vitro using a human liver microsomal preparation and heterologously expressed human CYP3A4 and CYP2D6.
32(0,1,1,2) 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.

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.
32(0,1,1,2) Details
15228152 Maurer HH, Kraemer T, Springer D, Staack RF: Chemistry, pharmacology, toxicology, and hepatic metabolism of designer drugs of the amphetamine (ecstasy), piperazine, and pyrrolidinophenone types: a synopsis. Ther Drug Monit. 2004 Apr;26(2):127-31.

In summary, polymorphically expressed CYP2D6 was the major enzyme catalyzing the major metabolic steps of the studied piperazine- and pyrrolidinophenone-derived designer drugs.
6(0,0,1,1) Details
14698036 Staack RF, Paul LD, Springer D, Kraemer T, Maurer HH: Cytochrome P450 dependent metabolism of the new designer drug 1-(3-trifluoromethylphenyl) piperazine (TFMPP). Biochem Pharmacol. 2004 Jan 15;67(2):235-44.

In the current study, it was examined whether this reaction may be catalyzed by cytochrome P450 (CYP) 2D6 by comparing TFMPP vs. hydroxy TFMPP ratios in urine from female Dark Agouti rats, a model of the human CYP2D6 poor metabolizer phenotype (PM), male Dark Agouti rats, an intermediate model, and WI, a model of the human CYP2D6 extensive metabolizer phenotype.
4(0,0,0,4) Details
14985146 Staack RF, Theobald DS, Paul LD, Springer D, Kraemer T, Maurer HH: In vivo metabolism of the new designer drug 1-(4-methoxyphenyl) piperazine (MeOPP) in rat and identification of the human cytochrome P450 enzymes responsible for the major metabolic step. Xenobiotica. 2004 Feb;34(2):179-92.

O-demethylation, the major metabolic step, was studied with cDNA-expressed human hepatic cytochrome P450 (CYP) enzymes in pooled human liver microsomes (pHLM) and in single donor human liver microsomes with CYP2D6 poor metabolizer genotype (PM HLM). 4.
4(0,0,0,4) Details
15640381 Zhu M, Zhao W, Jimenez H, Zhang D, Yeola S, Dai R, Vachharajani N, Mitroka J: Cytochrome P450 3A-mediated metabolism of buspirone in human liver microsomes. Drug Metab Dispos. 2005 Apr;33(4):500-7. Epub 2005 Jan 7.

Buspirone mainly underwent N-dealkylation to 1-pyrimidinylpiperazine (1-PP), N-oxidation on the piperazine ring to buspirone N-oxide (Bu N-oxide), and hydroxylation to 3'-hydroxybuspirone (3'-OH-Bu), 5-hydroxybuspirone (5-OH-Bu), and 6'-hydroxybuspirone (6'-OH-Bu) in HLMs.
Recombinant CYP3A4, CYP3A5, and CYP2D6 exhibited buspirone oxidation activities among nine P450 isoforms tested.
3(0,0,0,3) Details
17574934 Staack RF, Paul LD, Schmid D, Roider G, Rolf B: Proof of a 1-(3-chlorophenyl) piperazine (mCPP) intake: use as adulterant of cocaine resulting in drug-drug interactions?. J Chromatogr B Analyt Technol Biomed Life Sci. 2007 Aug 15;855(2):127-33. Epub 2007 May 29.

However, a PM phenotype could also be caused by drug-drug interactions with CYP2D6 inhibitors or substrates such as the co-consumed cocaine and diltiazem and/or diltiazem metabolites, respectively.
2(0,0,0,2) Details
18238857 Wen B, Ma L, Rodrigues AD, Zhu M: Detection of novel reactive metabolites of trazodone: evidence for CYP2D6-mediated bioactivation of m-chlorophenylpiperazine. Drug Metab Dispos. 2008 May;36(5):841-50. Epub 2008 Jan 31.

Following incubations with trazodone in the presence of glutathione, 1-(3'-chlorophenyl) piperazine (m-CPP), a major circulating and pharmacologically active metabolite of several antidepressants including trazodone, nefazodone, and etoperidone, was trapped with glutathione to afford the corresponding quinone imine-sulfydryl adducts M4 and M5.
2(0,0,0,2) Details
11038163 Jacobsen W, Christians U, Benet LZ: In vitro evaluation of the disposition of A novel cysteine protease inhibitor. Drug Metab Dispos. 2000 Nov;28(11):1343-51.

K11777 (N-methyl-piperazine-Phe-homoPhe-vinylsulfone-phenyl) is a potent, irreversible cysteine protease inhibitor.
CYP2D6 metabolized K11777 to its N-desmethyl metabolite with an apparent K (m) (9.2 +/- 1.4 microM) lower than for CYP3A4 (25.0 +/- 4.0 microM) and human liver microsomes.
2(0,0,0,2) Details
15056479 Wojcikowski J, Pichard-Garcia L, Maurel P, Daniel WA: The metabolism of the piperazine-type phenothiazine neuroleptic perazine by the human cytochrome P-450 isoenzymes. Eur Neuropsychopharmacol. 2004 May;14(3):199-208.

CYP2C9, CYP2E1 CYP2C19 and CYP2D6 are engaged to a lesser degree in 5-sulphoxidation, while CYP1A2, CYP3A4 and CYP2D6 in perazine N-demethylation (6-10%, depending on the isoform).
1(0,0,0,1) Details
18238859 Minato K, Suzuki R, Asagarasu A, Matsui T, Sato M: Biotransformation of 3-amino-5,6,7,8-tetrahydro-2-{4-[4-(quinolin-2-yl) piperazin-1-yl] butyl}qui nazolin-4 (3H)-one (TZB-30878), a novel 5-hydroxytryptamine (5-HT) 1A agonist/5-HT3 antagonist, in human hepatic cytochrome P450 enzymes. Drug Metab Dispos. 2008 May;36(5):831-40. Epub 2008 Jan 31.

Other P450 enzymes, such as a CYP2D6, played a minor role in its metabolism.
This compound has quinazoline, piperazine, and quinoline rings.
1(0,0,0,1) Details
20148045 Antia U: 'Party pill' drugs--BZP and TFMPP. N Z Med J. 2009 Dec 11;122(1307):55-68.


Their metabolism involves the hepatic P450 enzymes CYP2D6, CYP1A2 and CYP3A4 resulting in inhibited metabolism of other drugs and medicines, as well as compromised metabolism in poor metabolisers for CYP2D6.
1(0,0,0,1) Details
11502731 Cherstniakova SA, Bi D, Fuller DR, Mojsiak JZ, Collins JM, Cantilena LR: Metabolism of vanoxerine, 1-[2-[bis (4-fluorophenyl) methoxy] ethyl]-4-(3-phenylpropyl) piperazine, by human cytochrome P450 enzymes. Drug Metab Dispos. 2001 Sep;29(9):1216-20.

0(0,0,0,0) Details