AWD 131-138(Imepitoin) is a new low-affinity partial benzodiazepine receptor agonist with potent anticonvulsant and anxiolytic properties in rodent models.IC50 Value: Target: GABA receptorin vitro: AWD 131-138 dose-dependently stimulated GABA currents(Recombinant gamma-aminobutyric acid A (GABA(A)) receptors of the subunit compositions alpha1beta2gamma2, alpha1beta3gamma2, alpha2beta2gamma2, alpha3beta2gamma2 and alpha5beta2gamma2). At 10 microM AWD 131-138, this allosteric stimulation amounted in average to about 12-21% of the maximal stimulation achieved using diazepam. The threshold of stimulation was about 0.3-1.0 microM [1]. in vivo: AWD 131-138 did not produce midazolam-like responding or alter response rates at cumulative doses up to 18.0 mg/kg i.m. (plasma levels over 2100 ng/ml). When AWD 131-138 (10-100 microg/kg/injection) was studied by substitution, responding declined to vehicle substitution levels within three sessions. At the dose of 100 microg/kg i.v. AWD 131-138, sufficient drug was self-administered during the first session (about 3.5 mg/kg) to produce plasma levels above 1000 ng/ml, yet responding over the next two sessions dropped to vehicle levels [2]. Prolonged oral administration with twice-daily dosing of ELB 138 with either 5 or 40 mg/kg over a 5-week period was not associated with loss of anticonvulsant efficacy in the PTZ dog model [3].
Etifoxine-d5 is the deuterium labeled Etifoxine. Etifoxine, a non-benzodiazepine GABAergic compound, is a positive allosteric modulator of α1β2γ2 and α1β3γ2 subunit-containing GABAA receptors. Etifoxine reveals anxiolytic and anticonvulsant properties in rodents[1][2][3].
L-838417 is a selective partial agonist at the α2, α3 and α5 subtypes of the GABAA receptor and an antagonist at the α1, with binding Ki values of 0.79 nM, 0.67 nM, 1.67 nM, 267 nM, 2.25 nM and 2183 nM for α1β3γ2, α2β3γ2, α3β3γ2, α4β3γ2, α5β3γ2 and α6β3γ2[1].
PF 0713, a GABAA receptor agonist, is used as an intravenous sedative-hypnotic for general anaesthesia, ICU sedation, procedural sedation, chemotherapy.
TPA023B is a potent, α2/α3 subtype-selective GABAA receptor partial agonist with Ki of 2.0 and 1.8 nM, does not affect the functioning of the α1 subtype; demonstrates anxiolytic effects in rodent and primate models of anxiety, with no significant effects in ataxia and/or myorelaxation.
LAU159 is a functionally selective positive modulator of α1β3 GABA(A) receptor with an EC50 of 2.2 μM[1].
Ocinaplon (DOV 273547) is a partial GABAA receptor positive allosteric modulator with relatively high efficacy at the α1 subunit[1].
17β-Estradiol sulfate (sodium), also known as β-Estradiol 3-sulfate sodium salt, is a neuroactive steroid[1][2].
Riluzole hydrochloride is an anticonvulsant drug and belongs to the family of use-dependent Na+ channel blocker which can also inhibit GABA uptake with an IC50 of 43 μM.
BPDBA is a selective and noncompetitive betaine/GABA transporter (BGT-1) inhibitor with IC50s of 20 μM and 35 μM against human BGT-1 and mouse GAT2, respectively[1].
17β-Estradiol sulfate-d4 (sodium) is the deuterium labeled 17β-Estradiol sulfate 17β-Estradiol sulfate (sodium), also known as β-Estradiol 3-sulfate sodium salt, is a neuroactive steroid[1][2].
Abecarnil (ZK 112119) is a ligand or a partial agonist for benzodiazepine (BZ) receptor. Abecarnil possesses anxiolytic and anticonvulsant properties. Abecarnil can act as a positive allosteric modulator of GABAA receptor. Abecarnil inhibits the binding of the BZ [3H]lormetazepam to rat cerebral cortex membranes, with an IC50 of 0.82 nM. Abecarnil can be used for epilepsy research[1][2][3][4].
Broflanilide is a potential insecticide and metabolized to desmethyl-broflanilide, which is a potent antagonist at the insect resistant-to-dieldrin (RDL) GABA receptor, and inhibits S. litura RDL GABAR, with an IC50 value of 1.3 nM.
NNC-711 (hydrochloride) is a potent and selective inhibitor of GAT-1 ( GABA transporter 1) with an IC50 of 40 nM for hGAT-1. NNC-711 has anticonvulsant and analgesic effect in vivo and exhibits cognition-enhancing activity[1][2][3].
NS11394 is a potent and subtype-selective GABA(A) receptor-positive modulator; possesses a functional efficacy selectivity profile of alpha(5) > alpha(3) > alpha(2) > alpha(1) at GABA(A) alpha subunit-containing receptors.IC50 value:Target: GABA A receptor modulatorin vitro: NS11394 is unique in having superior efficacy at GABA(A)-alpha(3) receptors while maintaining low efficacy at GABA(A)-alpha(1) receptors. NS11394 has an excellent pharmacokinetic profile, which correlates with pharmacodynamic endpoints (CNS receptor occupancy), yielding a high level of confidence in deriving in vivo conclusions anchored to an in vitro selectivity profile and allowing for translation to higher species [2]. in vivo: Oral administration of NS11394 (1-30 mg/kg) to rats attenuated spontaneous nociceptive behaviors in response to hindpaw injection of formalin and capsaicin, effects that were blocked by the benzodiazepine site antagonist flumazenil [1]. NS11394 impairs memory in both rats and mice, which is possibly attributable to its efficacy at GABA(A)-alpha(5) receptors, albeit activity at this receptor might be relevant to its antinociceptive effects [2].
L-655708 is a potent α5 subunit-selective GABAA receptor inverse agonist (Ki = 0.45 nM).IC50: 0.45 nM (Ki)Target: GABAin vitro: L-655708 is a potent, selective inverse agonist for the benzodiazepine site of GABAA receptors containing the α5 subunit (Ki = 0.45 nM). Displays 50-100-fold selectivity over GABAA receptors containing α1, α2, α3 orα6 subunits in combination with β3 and γ2. Enhances LTP in a mouse hippocampal slice model and increases spatial learning, without displaying proconvulsant activity.in vivo: L-655708 at 0.7 mg/kg, administered intraperitoneally, would result in 60-70% occupancy of α5 GABAA receptors with limited binding to α1, α2, and α3 subunit-containing GABAA receptors and no significant off-target behavioral effects, such as sedation and motor impairment.[1]
MRK-016 is a selective, orally bioavailable inverse agonist of GABAA α5 receptor, with an EC50 of 3 nM for GABAA α5, and Kis of 0.83, 0.85, 0.77 and 1.4 nM for human GABAA α1β3γ2, GABAA α2β3γ2, GABAA α3β3γ2, and GABAA α5β3γ2, respectively; MRK-016 also readily penetrates the CNS.
FG 7142 (ZK 39106; LSU-65), a non-selectively benzodiazepine inverse agonist, has high affinity for the α1 subunit-containing GABAA receptor (Ki=91 nM). FG 7142 (ZK 39106; LSU-65) also modulates GABA-induced chloride flux at GABAA receptors expressing the α1 subunit (EC50= 137 nM). FG 7142 (ZK 39106; LSU-65) can increase tyrosine hydroxylation and cause upregulation of β-adrenoceptors in mouse cerebral cortex[1].
Aminooxyacetic acid hemihydrochloride is a malate-aspartate shuttle (MAS) inhibitor which also inhibits the GABA degradating enzyme GABA-T.
Acamprosate calcium(Campral EC) is a GABA receptor agonist and modulator of glutamatergic systems; reduces alcohol consumption in animal models of alcohol addiction.IC50 value:Target: GABA receptorAcamprosate, or N-acetyl homotaurine, is an N-methyl-D-aspartate receptor modulator approved by the Food and Drug Administration (FDA) as a pharmacological treatment for alcohol dependence.Acamprosate has low bioavailability, but also has an excellent tolerability and safety profile. In comparison with naltrexone and disulfiram, which are the other FDA-approved treatments for alcohol dependence, acamprosate is unique in that it is not metabolized by the liver and is also not impacted by alcohol use, so can be administered to patients with hepatitis or liver disease (a common comorbid condition among individuals with alcohol dependence) and to patients who continue drinking alcohol.
Etifoxine(HOE 36-801) is potentiator of GABAA receptor function in cultured neurons. Etifoxine preferentially acts on β2 or β3 subunit-containing GABAA receptors. IC50 value:Target: GABAA receptorEtifoxine exhibits anxiolytic activity in rodents and humans with no sedative, myorelaxant or mnesic side effects. Etifoxine acts as a ligand of the translocator protein (TSPO); promotes axonal regeneration.
NCS-382 (sodium) is a potent GABA receptor antagonist. NCS-382 (sodium) has anti-sedative and anti-hypnotic activities and can be used in research related to neurological diseases[1].
MRK-623 is a potent, α2/α3 subunit functionally selectiviie GABAA receptor agonist.
CGP7930 (3-(3’,5’-Di-tert-butyl-4’-hydroxy) phenyl-2, 2-dimethylpropanol) is a positive metabotropic GABAB receptor allosteric modulator. CGP7930 enhances the inhibitory effect of l-baclofen on the oscillatory activity of cultured cortical neurons[1].
U-89843A is an allosteric modulator of GABAA receptor. U-89843A enhances GABA-induced Cl- currents[1].
Loreclezole hydrochloride, an antiepileptic compound, is a selective GABAA receptor modulator and acts as a positive allosteric modulator of β2 or β3-subunit containing receptors[1][2].
Gaboxadol hydrochloride (Lu 02-030 hydrochloride) is a selective agonist at GABAA receptors that contain α4-δ subunits, and has anxiolytic and sedative effects[1].
E2730 is a noncompetitive but selective inhibitor of gamma-aminobutyric acid (GABA) transporter 1 (GAT1) with orally available and antiepileptic activity. E2730-mediated GAT1 inhibition is positively correlated with environmental GABA levels and selectively inhibits GAT1-mediated GABA uptake. E2730 (5-50 mg/kg; po) in rat amygdala ignition model, and in mouse cornea ignition (5-50 mg/kg), drug resistance 6Hz-44mA has demonstrated in vivo efficacy in models of psychomotor epilepsy (5-50 mg/kg), fragile X syndrome (2.5-300 mg/kg), and Dravet syndrome (10 mg/kg, 20 mg/kg)[1].
Tiagabine hydrochloride hydrate is a potent and selective GABA uptake inhibitor, used as an anticonvulsant agent, with IC50s of 67, 446 and 182 nM for [3H]GABA uptake in Synaptosomes, Neurons and Glia, respectively[1].
Vigabatrin Hcl(γ-Vinyl-GABA; Sabril) is a structural analog of the inhibitory neurotransmitter γ-aminobutyric acid (GABA) that irreversibly inhibits the catabolism of GABA by GABA transaminase.IC50 value:Target: GABA transaminaseClinical studies have shown that vigabatrin is superior to placebo in decreasing the frequency of infantile spasms. In tuberous sclerosis, vigabatrin may be considered the first-line treatment for IS. The mode of action is increasing concentrations of the inhibitory neurotransmitter GABA in the brain.A significant increase in seizure threshold was observed following systemic (i.p.) administration of high (600 or 1200 mg/kg) doses of vigabatrin. Bilateral microinjection of vigabatrin (10 μg) into either the anterior or posterior SNr also increased seizure threshold, but less markedly than systemic treatment.