Gabazine
Gabazine (SR-95531) is a drug that acts as an antagonist at GABAA receptors. It is used in scientific research and has no role in medicine, as it would be expected to produce convulsions if used in humans.[1]
Gabazine binds to the GABA recognition site of the receptor-channel complex and acts as an allosteric inhibitor of channel opening.[2] The net effect is to reduce GABA-mediated synaptic inhibition by inhibiting chloride flux across the cell membrane, and thus inhibiting neuronal hyperpolarization. While phasic (synaptic) inhibition is gabazine-sensitive, tonic (extrasynaptic) inhibition is relatively gabazine-insensitive.[3]
Gabazine has been found to bind to and antagonize α4βδ subunit-containing GABAA receptors, which may represent the GHB receptor.[4]
References
- ↑ Behrens, CJ; Van Den Boom, LP; Heinemann, U (2007). "Effects of the GABA(A) receptor antagonists bicuculline and gabazine on stimulus-induced sharp wave-ripple complexes in adult rat hippocampus in vitro". The European Journal of Neuroscience. 25 (7): 2170–81. doi:10.1111/j.1460-9568.2007.05462.x. PMID 17419756.
- ↑ Ueno, S; Bracamontes, J; Zorumski, C; Weiss, DS; Steinbach, JH (1997). "Bicuculline and gabazine are allosteric inhibitors of channel opening of the GABAA receptor". The Journal of neuroscience : the official journal of the Society for Neuroscience. 17 (2): 625–34. PMID 8987785.
- ↑ Yeung, JY; Canning, KJ; Zhu, G; Pennefather, P; MacDonald, JF; Orser, BA (2003). "Tonically activated GABAA receptors in hippocampal neurons are high-affinity, low-conductance sensors for extracellular GABA". Molecular Pharmacology. 63 (1): 2–8. doi:10.1124/mol.63.1.2. PMID 12488530.
- ↑ Absalom N, Eghorn LF, Villumsen IS, Karim N, Bay T, Olsen JV, Knudsen GM, Bräuner-Osborne H, Frølund B, Clausen RP, Chebib M, Wellendorph P (2012). "α4βδ GABA(A) receptors are high-affinity targets for γ-hydroxybutyric acid (GHB)". Proc. Natl. Acad. Sci. U.S.A. 109 (33): 13404–9. doi:10.1073/pnas.1204376109. PMC 3421209
. PMID 22753476.
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(ligands) | | Agonists | |
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| PAMs |
- (Abridged; see here for a full list): α-EMTBL
- Alcohols (e.g., ethanol)
- Anabolic steroids
- Avermectins (e.g., ivermectin)
- Barbiturates (e.g., phenobarbital)
- Benzodiazepines (e.g., diazepam)
- Bromide compounds (e.g., potassium bromide)
- Carbamates (e.g., meprobamate)
- Carbamazepine
- Chloralose
- Chlormezanone
- Clomethiazole
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- Etazepine
- Etifoxine
- Fenamates (e.g., mefenamic acid)
- Flavonoids (e.g., apigenin, hispidulin)
- Fluoxetine
- Flupirtine
- Imidazoles (e.g., etomidate)
- Kava constituents (e.g., kavain)
- Lanthanum
- Loreclezole
- Monastrol
- Neuroactive steroids (e.g., allopregnanolone, cholesterol)
- Niacin
- Nicotinamide (niacinamide)
- Nonbenzodiazepines (e.g., β-carbolines (e.g., abecarnil), cyclopyrrolones (e.g., zopiclone), imidazopyridines (e.g., zolpidem), pyrazolopyrimidines (e.g., zaleplon))
- Norfluoxetine
- Petrichloral
- Phenols (e.g., propofol)
- Phenytoin
- Piperidinediones (e.g., glutethimide)
- Propanidid
- Pyrazolopyridines (e.g., etazolate)
- Quinazolinones (e.g., methaqualone)
- Retigabine (ezogabine)
- ROD-188
- Skullcap constituents (e.g., baicalin)
- Stiripentol
- Sulfonylalkanes (e.g., sulfonmethane (sulfonal))
- Topiramate
- Valerian constituents (e.g., valerenic acid)
- Volatiles/gases (e.g., chloral hydrate, chloroform, diethyl ether, paraldehyde, sevoflurane)
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- 1,3M1B
- 3M2B
- 17-Phenylandrostenol
- α5IA (LS-193,268)
- β-CCB
- β-CCE
- β-CCM
- β-CCP
- β-EMGBL
- Anabolic steroids
- Amiloride
- Anisatin
- β-Lactams (e.g., penicillins, cephalosporins, carbapenems)
- Basmisanil
- Bemegride
- Bilobalide
- CHEB
- Cicutoxin
- Cloflubicyne
- Cyclothiazide
- DHEA
- DHEA-S
- Dieldrin
- (+)-DMBB
- DMCM
- DMPC
- EBOB
- Etbicyphat
- FG-7142 (ZK-31906)
- Fiproles (e.g., fipronil)
- Flavonoids (e.g., amentoflavone, oroxylin A)
- Flumazenil
- Fluoroquinolones (e.g., ciprofloxacin)
- Flurothyl
- Furosemide
- Iomazenil (123I)
- Isoallopregnanolone
- Isopregnanolone (sepranolone)
- L-655,708
- Laudanosine
- Leptazol
- Lindane
- MaxiPost
- Morphine
- Morphine-3-glucuronide
- MRK-016
- Naloxone
- Naltrexone
- Nicardipine
- Non-steroidal antiandrogens (e.g., apalutamide, bicalutamide, enzalutamide, flutamide, nilutamide)
- Oenanthotoxin
- Pentetrazol (metrazol)
- Phenylsilatrane
- Picrotoxin (i.e., picrotin and picrotoxinin)
- Pregnenolone sulfate
- Propybicyphat
- PWZ-029
- Radequinil
- Ro 15-4513
- Ro 19-4603
- RO4882224
- RO4938581
- Sarmazenil
- SCS
- Suritozole
- TB-21007
- TBOB
- TBPS
- TCS-1105
- Terbequinil
- TETS
- Thujone
- U-93631
- Zinc
- ZK-93426
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See also: GHBergics • Glutamatergics • Glycinergics |
