Alfaxalone
Clinical data
AHFS /Drugs.com International Drug Names
ATC code
Legal status
Legal status
Pharmacokinetic data
Bioavailability The alfaxalone molecule is solubilised using SBECD. Cyclodextrins are complex polysaccharides derived from starch that supply a hydrophobic centre for lipophilic drugs like alfaxalone.
Identifiers
3α-hydroxy-5α-pregnane-11,20-dione
CAS Number
PubChem CID
IUPHAR/BPS
ChemSpider
UNII
KEGG
ChEMBL
ECHA InfoCard 100.164.405
Chemical and physical data
Formula C 21 H 32 O 3
Molar mass 332.477 g/mol
3D model (Jmol )
O=C2[C@H]3[C@H]([C@@H]1CC[C@H](C(=O)C)[C@@]1(C)C2)CC[C@H]4C[C@H](O)CC[C@]34C
InChI=1S/C21H32O3/c1-12(22)16-6-7-17-15-5-4-13-10-14(23)8-9-20(13,2)19(15)18(24)11-21(16,17)3/h13-17,19,23H,4-11H2,1-3H3/t13-,14+,15-,16+,17-,19+,20-,21+/m0/s1
Y
Key:DUHUCHOQIDJXAT-OLVMNOGESA-N
Y
N Y (what is this?) (verify)
Alfaxalone (INN , JAN ), also known as alphaxalone or alphaxolone (BAN ), is a neuroactive steroid and general anaesthetic .[1] Alfaxan ,[2] [citation needed Along with alfadolone , it is also one of the constituents of anesthetic drug mixture althesin .
Unlike some of its predecessors alfaxalone is not associated with histamine release and anaphylaxis.[citation needed
A study 1987 found the primary mechanism for the anaesthetic action of alfaxalone to be modulation of neuronal cell membrane chloride ion transport, induced by binding of alfaxalone to GABAA cell surface receptors.[3]
A 1994 study found that alfaxalone binds to a different region of this receptor than the benzodiazepines .[4] GABAA receptors are located extrasynaptically and are responsible for tonic inhibition. The occurrence of tonic GABAA inhibition coincides with the expression of relatively rare receptor subunits, particularly the α4, α6, and δ subunits, and as a rule of thumb, δ subunit-containing receptors are extrasynaptic.[5]
Alfaxalone is metabolised rapidly in the liver. It has a very short plasma elimination half-life in dogs and cats.[citation needed
See also [ edit ] References [ edit ]
^ C.R. Ganellin; David J. Triggle (21 November 1996). Dictionary of Pharmacological Agents ISBN 978-0-412-46630-4 . ^ "Alfaxalone" . Drugs.com. ^ Harrison, N. L.; Vicini, S.; Barker, J. L. (1987). "A steroid anesthetic prolongs inhibitory postsynaptic currents in cultured rat hippocampal neurons" (pdf) . Journal of Neuroscience . 7 (2): 604–609. PMID 3819824 . ^ Mihic, S. J.; Whiting, P. J.; Klein, R. L.; Wafford, K. A.; Harris, R. A. (1994). "A single amino acid of the human gamma-aminobutyric acid type A receptor gamma 2 subunit determines benzodiazepine efficacy" (pdf) . The Journal of Biological Chemistry . 269 (52): 32768–32773. PMID 7806498 . ^ Wahab A, Heinemann U, Albus K (October 2009). "Effects of gamma-aminobutyric acid (GABA) agonists and a GABA uptake inhibitor on pharmacoresistant seizure like events in organotypic hippocampal slice cultures". Epilepsy Research 86 (2-3): 113–23. doi:10.1016/j.eplepsyres.2009.05.008. PMID 19535226 .
Alcohols
Barbiturates
Benzodiazepines
Carbamates
Flavonoids
Imidazoles
Kava constituents
Monoureides
Neuroactive steroids
Nonbenzodiazepines
Phenols
Piperidinediones
Pyrazolopyridines
Quinazolinones
Volatiles /gases
Others/unsorted
3-Hydroxybutanal α-EMTBL AA-29504 Avermectins (e.g., ivermectin )Bromide compounds (e.g., lithium bromide , potassium bromide , sodium bromide )Carbamazepine Chloralose Chlormezanone Clomethiazole DEABL Dihydroergolines (e.g., dihydroergocryptine , dihydroergosine , dihydroergotamine , ergoloid (dihydroergotoxine) )DS2 Efavirenz Etazepine Etifoxine Fenamates (e.g., flufenamic acid , mefenamic acid , niflumic acid , tolfenamic acid )Fluoxetine Flupirtine Hopantenic acid Lanthanum Lavender oil Lignans (e.g., 4-O-methylhonokiol , honokiol , magnolol , obovatol )Loreclezole Menthyl isovalerate (validolum) Monastrol Niacin Nicotinamide (niacinamide) Org 25,435 Phenytoin Propanidid Retigabine (ezogabine) Safranal Seproxetine Stiripentol Sulfonylalkanes (e.g., sulfonmethane (sulfonal) , tetronal , trional )Terpenoids (e.g., borneol )Topiramate Valerian constituents (e.g., isovaleric acid , isovaleramide , valerenic acid , valerenol )Unsorted benzodiazepine site PAMs: MRK-409 (MK-0343) TCS-1105 TCS-1205
Receptor (ligands )
PAMs: Alcohols (e.g., brometone , chlorobutanol (chloretone) , ethanol , tert -butanol (2M2P)tribromoethanol , trichloroethanol , trifluoroethanol )Alkylbenzene sulfonate Anandamide Barbiturates (e.g., pentobarbital , sodium thiopental )Chlormethiazole D12-116 Dihydropyridines (e.g., nicardipine )Etomidate Ginseng constituents (e.g., ginsenosides (e.g., ginsenoside-Rf ))Glutamic acid (glutamate) Ivermectin Ketamine Neuroactive steroids (e.g., alfaxolone , pregnenolone (eltanolone) , pregnenolone acetate , minaxolone , Org 20599 )Nitrous oxide Penicillin G Propofol Tamoxifen Tetrahydrocannabinol Triclofos Tropeines (e.g., atropine , bemesetron , cocaine , LY-278584 , tropisetron , zatosetron )Volatiles /gases (e.g., chloral hydrate , chloroform , desflurane , diethyl ether (ether) , enflurane , halothane , isoflurane , methoxyflurane , sevoflurane , toluene , trichloroethane (methyl chloroform) , trichloroethylene )Xenon Zinc
Antagonists: 2-Aminostrychnine 2-Nitrostrychnine 4-Phenyl-4-formyl-N-methylpiperidine αEMBTL Bicuculline Brucine Cacotheline Caffeine Colchicine Colubrine Cyanotriphenylborate Dendrobine Diaboline Endocannabinoids (e.g., 2-AG , anandamide (AEA) )Gaboxadol (THIP) Gelsemine iso-THAZ Isobutyric acid Isonipecotic acid Isostrychnine Laudanosine N-Methylbicuculline N-Methylstrychnine N,N-Dimethylmuscimol Nipecotic acid Pitrazepin Pseudostrychnine Quinolines (e.g., 4-hydroxyquinoline , 4-hydroxyquinoline-3-carboxylic acid , 5,7-CIQA , 7-CIQ , 7-TFQ , 7-TFQA )RU-5135 Sinomenine Strychnine Thiocolchicoside Tutin
NAMs: Amiloride Benzodiazepines (e.g., bromazepam , clonazepam , diazepam , flunitrazepam , flurazepam )Corymine Cyanotriphenylborate Daidzein Dihydropyridines (e.g., nicardipine , nifedipine , nitrendipine )Furosemide Genistein Ginkgo constituents (e.g., bilobalide , ginkgolides (e.g., ginkgolide A , ginkgolide B , ginkgolide C , ginkgolide J , ginkgolide M ))Imipramine NBQX Neuroactive steroids (e.g., 3α-androsterone sulfate , 3β-androsterone sulfate , deoxycorticosterone , DHEA sulfate , pregnenolone sulfate , progesterone )Opioids (e.g., codeine , dextromethorphan , dextrorphan , levomethadone , levorphanol , morphine , oripavine , pethidine , thebaine )Picrotoxin (i.e., picrotin and picrotoxinin )PMBA Riluzole Tropeines (e.g., bemesetron , LY-278584 , tropisetron , zatosetron )Verapamil Zinc
Transporter (blockers )
Others
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