Fenclonine - Misplaced Pages

(Redirected from Para-chlorophenylalanine) Chemical compound Pharmaceutical compound

Fenclonine
Clinical data

Other names	CP-10188; Fenclonina; Fencloninum; NSC-77370; Parachlorophenylalanine
ATC code	None
Identifiers
IUPAC name (S)-2-Amino-3-(4-chlorophenyl)propanoic acid
CAS Number	7424-00-2
PubChem CID	4652
IUPHAR/BPS	5240
ChemSpider	4491
UNII	R5J7E3L9SP
KEGG	D04143
CompTox Dashboard (EPA)	DTXSID4045139
ECHA InfoCard	100.028.229
Chemical and physical data
Formula	C₉H₁₀ClNO₂
Molar mass	199.63 g·mol
3D model (JSmol)	Interactive image
Density	1.336 g/cm
Melting point	240 °C (464 °F)
Boiling point	339.5 °C (643.1 °F)
SMILES Clc1ccc(cc1)CC(C(=O)O)N
InChI InChI=1S/C9H10ClNO2/c10-7-3-1-6(2-4-7)5-8(11)9(12)13/h1-4,8H,5,11H2,(H,12,13) Key:NIGWMJHCCYYCSF-UHFFFAOYSA-N
(verify)

Fenclonine, also known as para-chlorophenylalanine (PCPA), acts as a selective and irreversible inhibitor of tryptophan hydroxylase, which is a rate-limiting enzyme in the biosynthesis of serotonin.

It has been used experimentally to treat carcinoid syndrome, but the side effects, mostly hypersensitivity reactions and psychiatric disturbances, have prevented development for this use.

The effects of serotonin depletion from fenclonine are so drastic that serotonin cannot even be detected immunohistochemically within the first day after administration of a control dose. Tryptophan hydroxylase activity can be detected neither in cell bodies or nerve terminals. After one week 10% of control values (the baseline extrapolated for the study) had replenished in the raphe nucleus, and after two weeks from initial treatment as much was again detected in the hypothalamus region. Aromatic L-amino acid decarboxylase (AADC) levels were at no time affected.

It is used in scientific research in humans and animals to investigate the effects of serotonin depletion.

References

"Fenclonine" entry in Martindale – The Complete Drug Reference. Maintained in Martindale purely for archival purposes, and is no longer subject to revision and update. (Last reviewed: 2008-08-01; last modified: 2011-09-12). The Royal Pharmaceutical Society of Great Britain 2014
^ Jouvet M (August 1999). "Sleep and serotonin: an unfinished story". Neuropsychopharmacology. 21 (2 Suppl): 24S–27S. doi:10.1016/S0893-133X(99)00009-3. PMID 10432485.
Kvols LK (December 1986). "Metastatic carcinoid tumors and the carcinoid syndrome. A selective review of chemotherapy and hormonal therapy". The American Journal of Medicine. 81 (6B): 49–55. doi:10.1016/0002-9343(86)90584-x. PMID 2432781.
Park DH, Stone DM, Baker H, Kim KS, Joh TH (March 1994). "Early induction of rat brain tryptophan hydroxylase (TPH) mRNA following parachlorophenylalanine (PCPA) treatment". Brain Research. Molecular Brain Research. 22 (1–4): 20–8. doi:10.1016/0169-328x(94)90028-0. PMID 8015380.
Ruhé HG, Mason NS, Schene AH (April 2007). "Mood is indirectly related to serotonin, norepinephrine and dopamine levels in humans: a meta-analysis of monoamine depletion studies". Molecular Psychiatry. 12 (4): 331–59. doi:10.1038/sj.mp.4001949. PMID 17389902.

Monoamine metabolism modulators

Non-specific

AAADTooltip Aromatic L-amino acid decarboxylase

Substrates→Products: L-DOPA (levodopa)→Dopamine
5-HTP→Serotonin
L-Histidine→Histamine
Phenylalanine→Phenethylamine
L-Tyrosine→Tyramine
Tryptophan→Tryptamine

MAOTooltip Monoamine oxidase

Substrates→Products (with ALDHTooltip Aldehyde dehydrogenase/ALRTooltip ALR): Epinephrine (adrenaline)→DHMA
Metanephrine→MHPG/VMA
Norepinephrine (noradrenaline)→DHMA
Normetanephrine→MHPG/VMA
Dopamine→DOPAC
3-Methoxytyramine→HVA
Serotonin→5-HIAA

Inhibitors: Non-selective: Benmoxin
Caroxazone
Echinopsidine
Furazolidone
Guineesine
Hydralazine
Indantadol
Iproclozide
Iproniazid
Isocarboxazid
Isoniazid
Linezolid
Mebanazine
Metfendrazine
Nialamide
Octamoxin
Paraxazone
Phenelzine
Pheniprazine
Phenoxypropazine
Pivhydrazine
Procarbazine
Safrazine
Tranylcypromine

Inhibitors: MAO-A-selective: Amiflamine
Bazinaprine
Befloxatone
Brofaromine
Cimoxatone
Clorgiline
CX157 (Tyrima)
Eprobemide
Esuprone
Harmala alkaloids (e.g., harmine, harmaline, harman, norharman, tetrahydroharmine)
Methylene blue
Metralindole
Minaprine
Moclobemide
Pirlindole
Sercloremine
Tetrindole
Toloxatone

Inhibitors: MAO-B selective: Adarigiline
Almoxatone
D-Deprenyl
Desmethylselegiline
Ethanol
Ladostigil
Lazabemide
Milacemide
Mofegiline
Nicotine
Pargyline
Rasagiline
Safinamide
Selegiline (L-Deprenyl)
Sembragiline
Tisolagiline
Vafidemstat

Phenethylamines
(dopamine, epinephrine,
norepinephrine)

PAHTooltip Phenylalanine hydroxylase	Substrates→Products: Phenylalanine→Tyrosine Inhibitors: 3,4-Dihydroxystyrene α-Methylphenylalanine
THTooltip Tyrosine hydroxylase	Substrates→Products: Tyrosine→L-DOPA (levodopa) Inhibitors: 2-Hydroxyestradiol 2-Hydroxyestrone 3-Iodotyrosine α-Methyl-5-hydroxytryptophan (α-Me-5-HTP) α-Methylphenylalanine Aquayamycin Bulbocapnine Methyldopa (α-methyl-L-DOPA) Metirosine (α-methyl-p-tyrosine) Oudenone
DBHTooltip Dopamine beta-hydroxylase	Substrates→Products: Dopamine→Norepinephrine (Noradrenaline) Inhibitors: Bupicomide Disulfiram Dopastin Etamicastat Fusaric acid Nepicastat Phenopicolinic acid Tropolone Zamicastat
PNMTTooltip Phenylethanolamine N-methyltransferase	Substrates→Products: Norepinephrine (noradrenaline)→Epinephrine (adrenaline) Inhibitors: CGS-19281A SKF-64139 SKF-7698
COMTTooltip Catechol-O-methyl transferase	Substrates→Products: Dopamine→3-Methoxytyramine DOPAC→Homovanillic acid Norepinephrine→Normetanephrine Epinephrine→Metanephrine DOPEG→MOPEG DOMA→VMA 2-Hydroxyestradiol→2-Methoxyestradiol 2-Hydroxyestrone→2-Methoxyestrone 4-Hydroxyestradiol→4-Methoxyestradiol 4-Hydroxyestrone→4-Methoxyestrone Inhibitors: 2-Hydroxyestradiol 2-Hydroxyestrone Entacapone Nebicapone Neluxicapone Nitecapone Opicapone Quinalizarin Tolcapone

Tryptamines
(serotonin, melatonin)

TPHTooltip Tryptophan hydroxylase

Substrates→Products: Tryptophan→5-HTP

AANATTooltip Serotonin N-acetyl transferase

Substrates→Products: Serotonin→N-Acetylserotonin

ASMTTooltip Acetylserotonin O-methyltransferase

Substrates→Products: N-Acetylserotonin→Melatonin

Histamine

HDCTooltip Histidine decarboxylase

Substrates→Products: L-Histidine→Histamine

HNMTTooltip Histamine N-methyltransferase

Substrates→Products: Histamine→N-Methylhistamine

DAOTooltip Diamine oxidase

Substrates→Products: Histamine→Imidazole acetic acid

Inhibitors: Pimagedine (aminoguanidine)

See also: Receptor/signaling modulators • Adrenergics • Dopaminergics • Melatonergics • Serotonergics • Monoamine reuptake inhibitors • Monoamine releasing agents • Monoamine neurotoxins

v t e Phenethylamines
Phenethylamines	Psychedelics: 25B-NBOMe 25C-NBOMe 25D-NBOMe 25I-NBOMe 25N-NBOMe 2C-B 2C-B-AN 2C-Bn 2C-Bu 2C-C 2C-CN 2C-CP 2C-D 2C-E 2C-EF 2C-F 2C-G 2C-G-1 2C-G-2 2C-G-3 2C-G-4 2C-G-5 2C-G-6 2C-G-N 2C-H 2C-I 2C-iP 2C-N 2C-NH2 2C-O 2C-O-4 2C-P 2C-Ph 2C-SE 2C-T 2C-T-2 2C-T-3 2C-T-4 2C-T-5 2C-T-6 2C-T-7 2C-T-8 2C-T-9 2C-T-10 2C-T-11 2C-T-12 2C-T-13 2C-T-14 2C-T-15 2C-T-16 2C-T-17 2C-T-18 2C-T-19 2C-T-20 2C-T-21 2C-T-22 2C-T-22.5 2C-T-23 2C-T-24 2C-T-25 2C-T-27 2C-T-28 2C-T-30 2C-T-31 2C-T-32 2C-T-33 2C-TFE 2C-TFM 2C-YN 2C-V Allylescaline DESOXY Escaline Isoproscaline Jimscaline Macromerine MEPEA Mescaline Metaescaline Methallylescaline Proscaline Psi-2C-T-4 TCB-2 Stimulants: Phenylethanolamine Hordenine Phenethylamine Phenpromethamine α-Methylphenethylamine (amphetamine) β-Methylphenethylamine m-Methylphenethylamine N-Methylphenethylamine o-Methylphenethylamine p-Methylphenethylamine Methylphenidate Entactogens: Lophophine MDPEA MDMPEA Others: BOH DMPEA
Amphetamines	Psychedelics: 3C-AL 3C-BZ 3C-E 3C-MAL 3C-P Aleph Beatrice Bromo-DragonFLY D-Deprenyl DMA DMCPA DMMDA DOB DOC DOEF DOET DOI DOM DON DOPR DOTFM Ganesha MMDA MMDA-2 Psi-DOM TMA TeMA ZDCM-04 Stimulants: 2-FA 2-FMA 3-FA 3-FMA Acridorex Alfetamine Amfecloral Amfepentorex Amphetamine (Dextroamphetamine, Levoamphetamine) Amphetaminil Benfluorex Benzphetamine Cathine Clobenzorex Dimethylamphetamine Ephedrine Etilamfetamine Fencamfamin Fencamine Fenethylline Fenfluramine (Dexfenfluramine, Levofenfluramine) Fenproporex Flucetorex Fludorex Formetorex Furfenorex Gepefrine 4-Hydroxyamphetamine Iofetamine Isopropylamphetamine Lefetamine Lisdexamfetamine Mefenorex Metaraminol Methamphetamine (Dextromethamphetamine, Levomethamphetamine) Methoxyphenamine MMA Morforex Norfenfluramine L-Norpseudoephedrine N,alpha-Diethylphenylethylamine Oxifentorex Oxilofrine Ortetamine PBA PCA PFA PFMA PIA PMA PMEA PMMA Phenylpropanolamine Pholedrine Prenylamine Propylamphetamine Pseudoephedrine Sibutramine Tiflorex Tranylcypromine Xylopropamine Zylofuramine Entactogens: 4-FA 4-FMA 4-MA 4-MMA 4-MTA 5-APB 5-APDB 5-EAPB 5-IT 5-MAPB 5-MAPDB 6-APB 6-APDB 6-Chloro-MDMA 6-EAPB 6-IT 6-MAPB 6-MAPDB EDA IAP 2,3-MDA 3,4-MDA (tenamfetamine) MDEA MDHMA MDMA (midomafetamine) MDOH Methamnetamine MMDMA Naphthylaminopropane TAP Others: 3,4-DCA Amiflamine DiFMDA Selegiline (also D-Deprenyl)
Phentermines	Stimulants: Chlorphentermine Cloforex Clortermine Etolorex Mephentermine Pentorex Phentermine Entactogens: MDPH MDMPH Others: Cericlamine
Cathinones	Stimulants: 3-FMC 4-MC 4-BMC 4-CMC 4-EMC 4-FMC 4-MEC 4-MeMABP 4-MPD Amfepramone Benzedrone Brephedrone Buphedrone Bupropion Cathinone Dimethylcathinone Ethcathinone Eutylone Hydroxybupropion Methcathinone Methedrone NEB N-Ethylhexedrone N-Ethylpentedrone Pentedrone Pentylone Radafaxine Entactogens: 3,4-DMMC 3-MMC Butylone Ethylone Methylone Methylenedioxycathinone Mephedrone
Phenylisobutylamines	Entactogens: 4-CAB 4-MAB Ariadne BDB Butylone EBDB Eutylone MBDB Stimulants: Phenylisobutylamine
Phenylalkylpyrrolidines	Stimulants: α-PBP α-PHP α-PPP α-PVP MDPBP MDPPP MDPV 4-MePBP 4-MePHP 4-MePPP MOPPP MOPVP MPBP MPHP MPPP Naphyrone PEP Prolintane Pyrovalerone
Catecholamines (and close relatives)	6-FNE 6-OHDA a-Me-DA a-Me-TRA Adrenochrome Ciladopa D-DOPA (Dextrodopa) Dimetofrine Dopamine Epinephrine Epinine Etilefrine Ethylnorepinephrine Fenclonine Ibopamine Isoprenaline Isoetarine L-DOPA (Levodopa) L-DOPS (Droxidopa) L-Phenylalanine L-Tyrosine m-Tyramine Metanephrine Metaraminol Metaterol Metirosine Methyldopa N,N-Dimethyldopamine Nordefrin (Levonordefrin) Norepinephrine Norfenefrine (m-Octopamine) Normetanephrine Orciprenaline p-Octopamine p-Tyramine Phenylephrine Synephrine
Miscellaneous	AL-LAD Amidephrine Arbutamine Cafedrine Denopamine Desvenlafaxine Diphenidine Dizocilpine Dobutamine Dopexamine Ephenidine Etafedrine ETH-LAD Famprofazone Fluorolintane Hexapradol IP-LAD Lysergic acid amide Lysergic acid 2-butyl amide Lysergic acid 2,4-dimethylazetidide Lysergic acid diethylamide Methoxamine Methoxphenidine MT-45 PARGY-LAD Phenibut PRO-LAD Pronethalol Salbutamol (Levosalbutamol) Solriamfetol Theodrenaline Thiamphenicol UWA-101 Venlafaxine

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