kainate receptors

Memantine hydrochloride (Memantine HCl) is an AMANTADINE derivative that has some dopaminergic effects. Memantine hydrochloride has been proposed as an antiparkinson agent.

SYM 2081 is a specific kainate receptor agonist with an IC50 value of 35 nM for [3H]-kainate binding. SYM 2081 depolarizes the muscle and reduces the EPSP amplitude.

Unifiram is a nootropic agent.1It increases acetylcholine (ACh) release in the rat cerebral cortexin vivoand induces a long-lasting increase in the amplitude of field excitatory postsynaptic potentials (fEPSPs) in the rat hippocampal CA1 region (EC50= 27 nM). It does not bind to serotonin (5-HT), dopamine, muscarinic, nicotinic, adrenergic, glutamate, histamine, opioid, or GABA receptors at 1 μM. Unifiram (0.1 mg kg) improves memory in non-memory-impaired rats in a social learning test.2It also prevents memory deficits induced by the anticholinergic agent scopolamine, nicotinic receptor antagonist mecamylamine, GABABreceptor agonist baclofen, or α2-adrenergic receptor agonist clonidine in the passive avoidance test in mice when administered at a dose of 0.01 mg kg and prevents memory deficits induced by the AMPA kainate glutamate receptor antagonist NBQX at 0.1 mg kg.1 1.Romanelli, M.N., Galeotti, N., Ghelardini, C., et al.Pharmacological characterization of DM232 (unifiram) and DM235 (sunifiram), new potent cognition enhancersCNS Drug Rev.12(1)39-52(2006) 2.Ghelardini, C., Galeotti, N., Gualtieri, F., et al.The novel nootropic compound DM232 (unifiram) ameliorates memory impairment in mice and ratsDrug Develop. Res.56(1)23-32(2002)

BPAM344 is a potent positive allosteric modulator (PAM) of the KAR subunits GluK1b, GluK2a, and GluK3a.

UBP 302 is an effective and selective GLUK5-subunit-containing kainate receptor antagonist (apparent Kd=402 nM) and displays very little affinity on GluK2 kainate receptors.

CP-465022 Maleate is a potent, selective, noncompetitive AMPA receptor antagonist with anticonvulsant activity, effectively countering the Kainate-induced response in rat cortical neurons with an IC50 of 25 nM, making it a valuable instrument for studying the involvement of AMPA receptors in various physiological and pathophysiological processes [1] [2].

AMPA receptor antagonist with weak activity at NMDA receptors and little activity at kainate receptors

UBP310 (UBP 310) is a GLUK5 kainate receptor antagonist

N-Methyl-D-aspartate (NMDA) receptors are Ca2+ permeable ligand-gated channels of the central nervous system that are activated after binding of the co-agonists glutamate and glycine. CAY10608 is a propanolamine that potently, selectively, and non-competitively antagonizes the NR2B subunit of NMDA receptors (IC50 = 50 nM). It does not inhibit NR1, NR2A, NR2C, and NR2D subunits and has no significant effects on α-amino-3-hydroxy-5-methyl-4-isoxazolepropioinic acid (AMPA) or kainate receptors. CAY10608 is neuroprotective, since it prevents NMDA-triggered release of lactate dehydrogenase from cultured cortical neurons. Also, CAY10608, when administered intraperitoneally, reduces brain infarct volume resulting from transient ischemia via carotid artery occlusion.

L-803087 TFA is a highly potent and selective agonist of the somatostatin sst4 receptor, exhibiting a Ki value of 0.7 nM. It displays a remarkable selectivity, being over 280-fold more preferential for the sst4 receptor compared to other somatostatin receptors. Furthermore, L-803087 TFA promotes AMPA-mediated synaptic responses in hippocampal preparations and enhances kainate-induced seizures in mice.

Topiramate lithium (McN 4853) is a broad-spectrum antiepileptic compound with GluR5 receptor antagonistic properties. Its mechanism of action includes enhancing GABAergic activity, inhibiting kainate AMPA receptors, voltage-sensitive sodium and calcium channels, and increasing potassium conductance. Additionally, this compound inhibits carbonic anhydrase. [1][2][3]

NBQX, also known as FG9202, is an AMPA receptor antagonist. NBQX blocks AMPA receptors in micromolar concentrations (~10–20 µM) and also blocks kainate receptors. In experiments, it is used to counter glutamate excitotoxicity. NBQX was found to have anticonvulsant activity in rodent seizure models. As the disodium salt, NBQX is soluble in water at high concentrations (at least up to 100 mM).

CNQX (FG9065) is a competitive, non-NMDA glutamate receptor antagonist (IC50s = 0.3 and 1.5 μM for AMPA and kainate receptors, respectively)

DNQX (FG 9041) is a competitive, non-NMDA glutamate receptor antagonist (IC50s = 0.5 and 0.1 μM for AMPA and kainate receptors, respectively)

CNQX disodium is a competitive non-NMDA receptor antagonist and competitive AMPA kainate receptor antagonist in neuronal cultures.

AMPA/kainate antagonist-2 acts as a non-competitive antagonist of AMPA/kainate receptors.