gabaa α5

L-822179 (α5IA) is a selective inverse agonist for the Α5 subtype of GABAA receptor with higher intrinsic activity at the A5 subtype than other drugs.

Basmisanil (RG1662) is a negative allosteric modulator/inverse agonist of GABAAα5 receptors.Formulations containing basmisanil are in clinical trials for the treatment of cognitive impairments associated with Down syndrome.

ONO-8590580 (CS-2894) is a negative allosteric modulator of GABAA α5.

GABAA receptor agent 5 demonstrates antagonist activity across multiple GABAA receptor subtypes, and GABAA receptor agent 5 exhibits IC50 values of 0.24, 0.088, 0.068, 0.33, 0.79, 0.32, 0.079, and 0.051 μM for α1β2δ, α4β1δ, α4β2δ, α6β2δ, α1β2γ2, α2β2γ2, α3β2γ2, and α5β2γ2 receptor configurations, respectively. GABAA receptor agent 5 (compound 018) thereby provides a precise pharmacological tool for characterizing subtype-selective GABAA receptor inhibition and supports mechanistic neuropharmacology studies focused on inhibitory synaptic signaling and therapeutic antagonist development.

α5-GABAA receptor modulator 1 (Compound A-4) is a selective silent allosteric modulator (SAM) targeting the α5 subunit of GABAA receptors, useful for research into central nervous system (CNS) disorders.

DMCM hydrochloride is a non-selective fully inverse agonist of benzodiazepine. DMCM showed significant differences in human recombinant GABAA αxβ3γ2 receptor subtypes. For α1, α2, α3, and α5 receptors, their Kis were 10 nM, 13 nM, 7.5 nM, 2.2 nM, respectively.

CP-457920 is a selective α 5 GABAA receptor agonist for the treatment of dementia in Alzheimer's disease.

L-838417-D9 is a novel deuterated subtype-selective GABAA positive allosteric modulator, acting as a partial agonist at α2, α3 and α5 subtypes[1].

CL 218872 is a benzodiazepine agonist displaying selectivity for α1 subunit-containing GABAA receptors (Ki values are 130, 1820, 1530, > 10000, 490 and > 10000 nM for α1, α2, α3, α4, α5 and α6-subunit containing receptors respectively). Orally active anxi

MRK-016 is a selective GABAA α5 receptor inverse agonist/ negative allosteric modulator, (IC50=3 nM) with the advantages of being orally available and penetrating the blood-brain barrier.MRK-016 increases long time period potentiation (LTP) in mouse hippocampal slices, with memory-improvement, antidepressant, and pain-treating effects.

MK-0343, also known as MRK-409, is a GABAA receptor subtype-selective partial agonist that exhibits non-sedating anxiolytic activity in preclinical species but induces sedation in humans, binding with high affinity to α1-, α2-, α3-, and α5-containing human recombinant GABA(A) receptors while demonstrating greater agonist efficacy at α3 relative to α1 subtypes, thereby providing mechanistic insight into subtype-specific modulation of inhibitory neurotransmission.

RO 4938581 is an effective and selective agonist of GABAA α5 inverse (Ki: 4.6 nM for GABAA α5β3γ2a, and shows a lower affinity at α1β3γ2a, α2β3γ2a, α3β3γ2a (Ki, 174, 185, 80 nM, respectively)).

L-838417 is a GABAA receptor subtype-selective benzodiazepine site-selective ligand and GABAA receptor-positive modulator.L-838417 is a selective partial agonist of the α2, α3, and α5 subtypes and an antagonist of the α1 subtype and is used in the study of anxiety disorders.

NS11394 is a effective and subtype-selective GABA(A) receptor-positive modulator; possesses a functional efficacy selectivity profile of α(5) > α(3) > α(2) > α(1) at GABA(A) alpha subunit-containing receptors.

ENX-101 is an orally active partial positive allosteric modulator (PAM) of the (GABAA) receptor. It selectively targets the α2β2γ2L (EC50= 0.76 nM), α2β3γ2L (EC50= 0.61 nM), α3 (EC50= 1.97 nM), and α5 (EC50= 0.85 nM) subunits of the GABA receptor. ENX-101 demonstrates anticonvulsant activity in various animal models.

ZK93423 is a potent agonist of benzodiazepine receptor (IC50 = 1 nM) with non-selective between α1-, α2-, α3- and α5-subunit containing GABAA receptors, Ki values are 4.1, 4.2, 6 and 4.5 nM for inhibition of [3H]Ro15-1788 binding to human recombinant α1β3

Afizagabar (S44819) is a first-in-class, competitive, and selective antagonist at the GABA-binding site of the α5-GABAAR, with an IC50 of 585 nM for α5β2γ2 and a Ki of 66 nM for α5β3γ2. It enhances hippocampal synaptic plasticity and exhibits pro-cognitive efficacy [1].

GABAA receptor modulator-2 (Compound 20) is a selective, orally active α5-GABAAR negative conformation modulator (Ki: 4.1 nM) that exhibits high metabolic stability and a good central nervous system safety profile.

MRK-898, an orally active modulator of the GABA(A) receptor, selectively interacts with the α1, α2, α3, and α5 subunits, displaying K i values of 1.2 nM, 1.0 nM, 0.73 nM, and 0.50 nM, respectively. It is noteworthy that the α1-containing receptors of GABA(A) are classified as "sedative," whereas receptors containing α2 and/or α3 are designated as "anxiolytic" subtype(s) [1].