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targets (10) enzymes (6)
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Identification
Name Hexobarbital
Accession Number DB01355 (EXPT03301)
Type small molecule
Groups approved
Description

A barbiturate that is effective as a hypnotic and sedative. [PubChem]
Structure Thumb
Download: MOL | SDF | SMILES | InChI
Display: 2D Structure | 3D Structure
Synonyms
  • 5-(1-cyclohexen-1-yl)-1,5-dimethylbarbituric acid
  • Hexobarbitone
  • Methexenyl
  • Methylhexabital
Brand names
  • Barbidorm
  • Citopan
  • Cyclopal
  • Cyclopan
  • Evipal
  • Evipan
  • Noctivane
  • Sombucaps
  • Sombulex
  • Somnalert
Brand name mixtures Not Available
Categories
  • Hypnotics and Sedatives
  • GABA Modulators
  • Barbiturates
  • Adjuvants
CAS number 56-29-1
Weight Average: 236.267
Monoisotopic: 236.116092388
Chemical Formula C12H16N2O3
InChI Key InChIKey=UYXAWHWODHRRMR-UHFFFAOYSA-N
InChI
InChI=1S/C12H16N2O3/c1-12(8-6-4-3-5-7-8)9(15)13-11(17)14(2)10(12)16/h6H,3-5,7H2,1-2H3,(H,13,15,17)
Plain Text
IUPAC Name
5-(cyclohex-1-en-1-yl)-1,5-dimethyl-1,3-diazinane-2,4,6-trione
SMILES
CN1C(=O)NC(=O)C(C)(C1=O)C1=CCCCC1
Plain Text
Mass Spec show (9.2 KB)
Taxonomy
Kingdom Organic
Classes
  • Barbiturates
Substructures
  • Barbiturates
  • Carbonyl Compounds
  • Alkanes and Alkenes
  • Carboxylic Acids and Derivatives
  • Amino Ketones
  • Ureas and Derivatives
  • Pyrimidines and Derivatives
  • Heterocyclic compounds
  • Carboxamides and Derivatives
  • Cyclohexenes and Derivatives
Pharmacology
Indication For the induction of anesthesia prior to the use of other general anesthetic agents and for induction of anesthesia for short surgical, diagnostic, or therapeutic procedures associated with minimal painful stimuli.
Pharmacodynamics Hexobarbital is a barbiturate derivative having hypnotic and sedative effects. It was used in the 1940s-1950s as an agent for inducing anesthesia for surgery and has a relatively fast onset of effects and short duration of action. However it can be difficult to control the depth of anesthesia with hexobarbital which makes it quite dangerous, and it has now been replaced by safer drugs in human medicine, usually thiopental would be the barbiturate of choice for this application these days.
Mechanism of action Hexobarbital binds at a distinct binding site associated with a Cl- ionopore at the GABA-A receptor, increasing the duration of time for which the Cl- ionopore is open. The post-synaptic inhibitory effect of GABA in the thalamus is, therefore, prolonged.
Absorption Not Available
Volume of distribution Not Available
Protein binding 25%
Metabolism

Hepatic.

Enzyme Metabolite Reaction Km Vmax
Prostaglandin G/H synthase 1 Epoxy-hexobarbital
Cytochrome P450 2C9 3'-Hydroxyhexobarbital 3'-hydroxylation
Cytochrome P450 2C19 3'-Hydroxyhexobarbital 3'-hydroxylation 740 0
Route of elimination Not Available
Half life Not Available
Clearance Not Available
Toxicity Symptoms of an overdose typically include sluggishness, incoordination, difficulty in thinking, slowness of speech, faulty judgment, drowsiness or coma, shallow breathing, staggering, and in severe cases coma and death.
Affected organisms
  • Humans and other mammals
Pathways Not Available
Pharmacoeconomics
Manufacturers Not Available
Packagers Not Available
Dosage forms
Form Route Strength
Tablet Oral 250 mg
Prices Not Available
Patents Not Available
Properties
State solid
Melting point Not Available
Experimental Properties
Property Value Source
logP 1.98 [SANGSTER (1994)] PhysProp
logS -2.74 [ADME Research, USCD] PhysProp
Predicted Properties
Property Value Source
water solubility 1.51e+00 g/l ALOGPS
logP 1.80 ALOGPS
logP 1.25 ChemAxon Molconvert
logS -2.19 ALOGPS
pKa ChemAxon Molconvert
hydrogen acceptor count 3 ChemAxon Molconvert
hydrogen donor count 1 ChemAxon Molconvert
polar surface area 66.48 ChemAxon Molconvert
rotatable bond count 1 ChemAxon Molconvert
refractivity 61.95 ChemAxon Molconvert
polarizability 24.14 ChemAxon Molconvert
References
Synthesis Reference Not Available
General Reference
  1. Takenoshita R, Toki S: [New aspects of hexobarbital metabolism: stereoselective metabolism, new metabolic pathway via GSH conjugation, and 3-hydroxyhexobarbital dehydrogenases] Yakugaku Zasshi. 2004 Dec;124(12):857-71. Pubmed
  2. Wahlstrom G: A study of the duration of acute tolerance induced with hexobarbital in male rats. Pharmacol Biochem Behav. 1998 Apr;59(4):945-8. Pubmed
  3. Korkmaz S, Ljungblad E, Wahlstrom G: Interaction between flumazenil and the anesthetic effects of hexobarbital in the rat. Brain Res. 1995 Apr 10;676(2):371-7. Pubmed
  4. Dall V, Orntoft U, Schmidt A, Nordholm L: Interaction of the competitive AMPA receptor antagonist NBQX with hexobarbital. Pharmacol Biochem Behav. 1993 Sep;46(1):73-6. Pubmed
External Links
Resource Link
KEGG Drug D01071 Link_out
KEGG Compound C11723 Link_out
PubChem Compound 3608 Link_out
PubChem Substance 46508777 Link_out
ChemSpider 3482 Link_out
ChEBI 5706 Link_out
ChEMBL 5706 Link_out
Therapeutic Targets Database DAP000688 Link_out
PharmGKB PA449875 Link_out
Drug Product Database 0 Link_out
Wikipedia http://en.wikipedia.org/wiki/Hexobarbital Link_out
ATC Codes
  • N05CA16
  • N01AF02
AHFS Codes Not Available
PDB Entries Not Available
FDA label Not Available
MSDS Not Available
Interactions
Drug Interactions Not Available
Food Interactions Not Available
Targets

1. Gamma-aminobutyric-acid receptor subunit alpha-1

Pharmacological action: yes
Actions: potentiator

GABA, the major inhibitory neurotransmitter in the vertebrate brain, mediates neuronal inhibition by binding to the GABA/benzodiazepine receptor and opening an integral chloride channel

Organism class: human
UniProt ID: P14867 Link_out
Gene: GABRA1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Whiting PJ: The GABAA receptor gene family: new opportunities for drug development. Curr Opin Drug Discov Devel. 2003 Sep;6(5):648-57. Pubmed
  2. Mehta AK, Ticku MK: An update on GABAA receptors. Brain Res Brain Res Rev. 1999 Apr;29(2-3):196-217. Pubmed
  3. Yamakura T, Bertaccini E, Trudell JR, Harris RA: Anesthetics and ion channels: molecular models and sites of action. Annu Rev Pharmacol Toxicol. 2001;41:23-51. Pubmed
  4. Krasowski MD, Harrison NL: General anaesthetic actions on ligand-gated ion channels. Cell Mol Life Sci. 1999 Aug 15;55(10):1278-303. Pubmed
  5. Tomlin SL, Jenkins A, Lieb WR, Franks NP: Preparation of barbiturate optical isomers and their effects on GABA receptors. Anesthesiology. 1999 Jun;90(6):1714-22. Pubmed
  6. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. Pubmed
  7. Overington JP, Al-Lazikani B, Hopkins AL: How many drug targets are there? Nat Rev Drug Discov. 2006 Dec;5(12):993-6. Pubmed
  8. Imming P, Sinning C, Meyer A: Drugs, their targets and the nature and number of drug targets. Nat Rev Drug Discov. 2006 Oct;5(10):821-34. Pubmed

2. Gamma-aminobutyric-acid receptor subunit alpha-2

Pharmacological action: yes
Actions: potentiator

GABA, the major inhibitory neurotransmitter in the vertebrate brain, mediates neuronal inhibition by binding to the GABA/benzodiazepine receptor and opening an integral chloride channel

Organism class: human
UniProt ID: P47869 Link_out
Gene: GABRA2 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Yamakura T, Bertaccini E, Trudell JR, Harris RA: Anesthetics and ion channels: molecular models and sites of action. Annu Rev Pharmacol Toxicol. 2001;41:23-51. Pubmed
  2. Mehta AK, Ticku MK: An update on GABAA receptors. Brain Res Brain Res Rev. 1999 Apr;29(2-3):196-217. Pubmed

3. Gamma-aminobutyric-acid receptor subunit alpha-3

Pharmacological action: yes
Actions: potentiator

GABA, the major inhibitory neurotransmitter in the vertebrate brain, mediates neuronal inhibition by binding to the GABA/benzodiazepine receptor and opening an integral chloride channel

Organism class: human
UniProt ID: P34903 Link_out
Gene: GABRA3 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Yamakura T, Bertaccini E, Trudell JR, Harris RA: Anesthetics and ion channels: molecular models and sites of action. Annu Rev Pharmacol Toxicol. 2001;41:23-51. Pubmed
  2. Mehta AK, Ticku MK: An update on GABAA receptors. Brain Res Brain Res Rev. 1999 Apr;29(2-3):196-217. Pubmed

4. Gamma-aminobutyric-acid receptor subunit alpha-4

Pharmacological action: yes
Actions: potentiator

GABA, the major inhibitory neurotransmitter in the vertebrate brain, mediates neuronal inhibition by binding to the GABA/benzodiazepine receptor and opening an integral chloride channel

Organism class: human
UniProt ID: P48169 Link_out
Gene: GABRA4 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Mehta AK, Ticku MK: An update on GABAA receptors. Brain Res Brain Res Rev. 1999 Apr;29(2-3):196-217. Pubmed

5. Gamma-aminobutyric-acid receptor subunit alpha-5

Pharmacological action: yes
Actions: potentiator

GABA, the major inhibitory neurotransmitter in the vertebrate brain, mediates neuronal inhibition by binding to the GABA/benzodiazepine receptor and opening an integral chloride channel

Organism class: human
UniProt ID: P31644 Link_out
Gene: GABRA5 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Yamakura T, Bertaccini E, Trudell JR, Harris RA: Anesthetics and ion channels: molecular models and sites of action. Annu Rev Pharmacol Toxicol. 2001;41:23-51. Pubmed
  2. Mehta AK, Ticku MK: An update on GABAA receptors. Brain Res Brain Res Rev. 1999 Apr;29(2-3):196-217. Pubmed

6. Gamma-aminobutyric-acid receptor subunit alpha-6

Pharmacological action: yes
Actions: potentiator

GABA, the major inhibitory neurotransmitter in the vertebrate brain, mediates neuronal inhibition by binding to the GABA/benzodiazepine receptor and opening an integral chloride channel

Organism class: human
UniProt ID: Q16445 Link_out
Gene: GABRA6 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Mehta AK, Ticku MK: An update on GABAA receptors. Brain Res Brain Res Rev. 1999 Apr;29(2-3):196-217. Pubmed
  2. Yamakura T, Bertaccini E, Trudell JR, Harris RA: Anesthetics and ion channels: molecular models and sites of action. Annu Rev Pharmacol Toxicol. 2001;41:23-51. Pubmed

7. Neuronal acetylcholine receptor subunit alpha-4

Pharmacological action: unknown
Actions: antagonist

After binding acetylcholine, the AChR responds by an extensive change in conformation that affects all subunits and leads to opening of an ion-conducting channel across the plasma membrane

Organism class: human
UniProt ID: P43681 Link_out
Gene: CHRNA4 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Yamakura T, Bertaccini E, Trudell JR, Harris RA: Anesthetics and ion channels: molecular models and sites of action. Annu Rev Pharmacol Toxicol. 2001;41:23-51. Pubmed
  2. Arias HR, Bhumireddy P: Anesthetics as chemical tools to study the structure and function of nicotinic acetylcholine receptors. Curr Protein Pept Sci. 2005 Oct;6(5):451-72. Pubmed
  3. Krasowski MD, Harrison NL: General anaesthetic actions on ligand-gated ion channels. Cell Mol Life Sci. 1999 Aug 15;55(10):1278-303. Pubmed

8. Neuronal acetylcholine receptor subunit alpha-7

Pharmacological action: unknown
Actions: antagonist

After binding acetylcholine, the AChR responds by an extensive change in conformation that affects all subunits and leads to opening of an ion-conducting channel across the plasma membrane

Organism class: human
UniProt ID: P36544 Link_out
Gene: CHRNA7 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Yamakura T, Bertaccini E, Trudell JR, Harris RA: Anesthetics and ion channels: molecular models and sites of action. Annu Rev Pharmacol Toxicol. 2001;41:23-51. Pubmed
  2. Arias HR, Bhumireddy P: Anesthetics as chemical tools to study the structure and function of nicotinic acetylcholine receptors. Curr Protein Pept Sci. 2005 Oct;6(5):451-72. Pubmed
  3. Krasowski MD, Harrison NL: General anaesthetic actions on ligand-gated ion channels. Cell Mol Life Sci. 1999 Aug 15;55(10):1278-303. Pubmed

9. Glutamate receptor 2

Pharmacological action: unknown
Actions: antagonist

Receptor for glutamate. L-glutamate acts as an excitatory neurotransmitter at many synapses in the central nervous system. The postsynaptic actions of Glu are mediated by a variety of receptors that are named according to their selective agonists. This receptor binds AMPA(quisqualate) > glutamate > kainate

Organism class: human
UniProt ID: P42262 Link_out
Gene: GRIA2 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Yamakura T, Bertaccini E, Trudell JR, Harris RA: Anesthetics and ion channels: molecular models and sites of action. Annu Rev Pharmacol Toxicol. 2001;41:23-51. Pubmed
  2. Krasowski MD, Harrison NL: General anaesthetic actions on ligand-gated ion channels. Cell Mol Life Sci. 1999 Aug 15;55(10):1278-303. Pubmed

10. Glutamate receptor, ionotropic kainate 2

Pharmacological action: unknown
Actions: antagonist

L-glutamate acts as an excitatory neurotransmitter at many synapses in the central nervous system. The postsynaptic actions of Glu are mediated by a variety of receptors that are named according to their selective agonists. May be involved in the transmission of light information from the retina to the hypothalamus. This receptor binds domoate > kainate > quisqualate > 6-cyano-7-nitroquinoxaline-2,3-dione > L-glutamate = 6,7- dinitroquinoxaline-2,3-dione > dihydrokainate

Organism class: human
UniProt ID: Q13002 Link_out
Gene: GRIK2 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Yamakura T, Bertaccini E, Trudell JR, Harris RA: Anesthetics and ion channels: molecular models and sites of action. Annu Rev Pharmacol Toxicol. 2001;41:23-51. Pubmed
  2. Krasowski MD, Harrison NL: General anaesthetic actions on ligand-gated ion channels. Cell Mol Life Sci. 1999 Aug 15;55(10):1278-303. Pubmed
Enzymes

1. Cytochrome P450 2C19

Actions: substrate

Responsible for the metabolism of a number of therapeutic agents such as the anticonvulsant drug S-mephenytoin, omeprazole, proguanil, certain barbiturates, diazepam, propranolol, citalopram and imipramine

UniProt ID: P33261 Link_out
Gene: CYP2C19 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Flockhart DA. Drug Interactions: Cytochrome P450 Drug Interaction Table. Indiana University School of Medicine (2007). Accessed May 28, 2010.
  2. Zhou SF, Zhou ZW, Yang LP, Cai JP: Substrates, inducers, inhibitors and structure-activity relationships of human Cytochrome P450 2C9 and implications in drug development. Curr Med Chem. 2009;16(27):3480-675. Epub 2009 Sep 1. Pubmed
  3. Adedoyin A, Prakash C, O’Shea D, Blair IA, Wilkinson GR: Stereoselective disposition of hexobarbital and its metabolites: relationship to the S-mephenytoin polymorphism in Caucasian and Chinese subjects. Pharmacogenetics. 1994 Feb;4(1):27-38. Pubmed
  4. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. Pubmed
  5. Lewis DF, Modi S, Dickins M: Structure-activity relationship for human cytochrome P450 substrates and inhibitors. Drug Metab Rev. 2002 Feb-May;34(1-2):69-82. Pubmed

2. Cytochrome P450 2C9

Actions: substrate

Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. This enzyme contributes to the wide pharmacokinetics variability of the metabolism of drugs such as S- warfarin, diclofenac, phenytoin, tolbutamide and losartan

UniProt ID: P11712 Link_out
Gene: CYP2C9
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Zhou SF, Zhou ZW, Yang LP, Cai JP: Substrates, inducers, inhibitors and structure-activity relationships of human Cytochrome P450 2C9 and implications in drug development. Curr Med Chem. 2009;16(27):3480-675. Epub 2009 Sep 1. Pubmed
  2. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. Pubmed

3. Prostaglandin G/H synthase 1

Actions: substrate

May play an important role in regulating or promoting cell proliferation in some normal and neoplastically transformed cells

UniProt ID: P23219 Link_out
Gene: PTGS1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Zhou SF, Zhou ZW, Yang LP, Cai JP: Substrates, inducers, inhibitors and structure-activity relationships of human Cytochrome P450 2C9 and implications in drug development. Curr Med Chem. 2009;16(27):3480-675. Epub 2009 Sep 1. Pubmed

4. Cytochrome P450 2E1

Metabolizes several precarcinogens, drugs, and solvents to reactive metabolites. Inactivates a number of drugs and xenobiotics and also bioactivates many xenobiotic substrates to their hepatotoxic or carcinogenic forms

UniProt ID: P05181 Link_out
Gene: CYP2E1 Link_out
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Ono S, Hatanaka T, Hotta H, Satoh T, Gonzalez FJ, Tsutsui M: Specificity of substrate and inhibitor probes for cytochrome P450s: evaluation of in vitro metabolism using cDNA-expressed human P450s and human liver microsomes. Xenobiotica. 1996 Jul;26(7):681-93. Pubmed

5. Cytochrome P450 1A2

Actions: substrate

Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Most active in catalyzing 2-hydroxylation. Caffeine is metabolized primarily by cytochrome CYP1A2 in the liver through an initial N3-demethylation. Also acts in the metabolism of aflatoxin B1 and acetaminophen

UniProt ID: P05177 Link_out
Gene: CYP1A2
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. Pubmed

6. Cytochrome P450 3A4

Actions: substrate

Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It performs a variety of oxidation reactions (e.g. caffeine 8-oxidation, omeprazole sulphoxidation, midazolam 1'-hydroxylation and midazolam 4- hydroxylation) of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. The enzyme also hydroxylates etoposide

UniProt ID: P08684 Link_out
Gene: CYP3A4
Protein Sequence: FASTA
Gene Sequence: FASTA
SNPs: SNPJam Report Link_out

References:
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. Pubmed
Comments
Drug created on June 13, 2005 07:24 / Updated on October 05, 2011 15:34

This project is supported by Genome Alberta & Genome Canada, a not-for-profit organization that is leading Canada's national genomics strategy with $600 million in funding from the federal government. This project is also supported in part by GenomeQuest, Inc., an enterprise genomic information company serving the life science community.