iGluR Antagonist

D-AP5 (D-APV) is a selective and competitive NMDA receptor antagonist with a K_d of 1.4 μM. D-AP5 (D-APV) inhibits the glutamate binding site of NMDA receptors.

Blixeprodil hydrochloride (GM-1020 hydrochloride) is an orally active, blood-brain barrier-penetrant NMDA receptor inhibitor with a K_i of 3.25 µM in rat cortical tissues. Blixeprodil hydrochloride binds to the MK-801 ion channel site and blocks NMDA receptor-mediated currents in hyperpolarized states in a voltage-dependent manner. Blixeprodil hydrochloride modulates the power of cortical EEG frequency bands, alters spontaneous motor activity, and induces ataxia at high doses. Blixeprodil hydrochloride can be used in the research of depression.

Dizocilpine maleate (MK-801 maleate) is a potent, selective and non-competitive NMDA receptor antagonist with K_d of 37.2 nM in rat brain membranes.

L-Phenylalanine ((S)-2-Amino-3-phenylpropionic acid) is an essential amino acid isolated from Escherichia coli. L-Phenylalanine is a α2δ subunit of voltage-dependent Ca⁺ channels antagonist with a K_i of 980 nM. L-phenylalanine is a competitive antagonist for the glycine- and glutamate-binding sites of N-methyl-D-aspartate receptors (NMDARs) (K_B of 573 μM ) and non-NMDARs, respectively. L-Phenylalanine is widely used in the production of food flavors and pharmaceuticals.

Dizocilpine (MK-801), a potent anticonvulsant, is a selective and non-competitive NMDA receptor antagonist, with a K_d of 37.2 nM in rat brain membranes. Dizocilpine acts by binding to a site located within the NMDA associated ion channel and thus prevents Ca²⁺ flux.

Kynurenic acid, an endogenous tryptophan metabolite, is a broad-spectrum antagonist targeting NMDA, glutamate, α7 nicotinic acetylcholine receptor. Kynurenic acid is also an agonist of GPR35/CXCR8.

CNQX (FG9065) is a potent and competitive AMPA/kainate receptor antagonist with IC₅₀s of 0.3 μM and 1.5 μM, respectively. CNQX is a competitive non-NMDA receptor antagonist. CNQX blocks the expression of fear-potentiated startle in rats.

NBQX (FG9202) is a highly selective and competitive AMPA receptor antagonist. NBQX has neuroprotective and anticonvulsant activity.

Cycloleucine is a specific inhibitor of S-adenosyl-methionine mediated methylation. Cycloleucine is antagonist of NMDA receptor associated glycine receptor, with a K_i of 600 μM. Cycloleucine is also a competitive inhibitor of ATP: L-methionine-S-adenosyl transferase in vitro. Cycloleucine has anxiolytic and cytostatic effects.

5'-Guanylic acid is a purine nucleotide that participates in physiological processes such as energy metabolism, signal transduction, and gene expression regulation. 5'-Guanylic acid regulates the expression of genes related to fatty acid metabolism. 5'-Guanylic acid is the weak agonist for ionotropic glutamate receptors (iGluR), reduces the activity of the glutamatergic system and exhibits neuroprotective effect. 5'-Guanylic acid also causes neuronal cell death at high concentrations.

DL-AP5 (2-APV) is a competitive NMDA (N-methyl-D-aspartate) receptor antagonist. DL-AP5 shows significantly antinociceptive activity. DL-AP5 specifically blocks on channels in the rabbit retina.

Memantine is an orally active, noncompetitive N-methyl-D-aspartate receptor (NMDAR) antagonist. Memantine can be used for the research of moderate-to-severe Alzheimer's disease (AD).

L-Phenylalanine-d₅ is the deuterium labeled L-Phenylalanine. L-Phenylalanine ((S)-2-Amino-3-phenylpropionic acid) is an essential amino acid isolated from Escherichia coli. L-Phenylalanine is a α2δ subunit of voltage-dependent Ca+ channels antagonist with a K_i of 980 nM. L-phenylalanine is a competitive antagonist for the glycine- and glutamate-binding sites of N-methyl-D-aspartate receptors (NMDARs) (KB of 573 μM ) and non-NMDARs, respectively. L-Phenylalanine is widely used in the production of food flavors and pharmaceuticals.

Topiramate (McN 4853) is a broad-spectrum antiepileptic agent. Topiramate is a GluR5 receptor antagonist. Topiramate produces its antiepileptic effects through enhancement of GABAergic activity, inhibition of kainate/AMPA receptors, inhibition of voltage-sensitive sodium and calcium channels, increases in potassium conductance, and inhibition of carbonic anhydrase.

Diphenhydramine is a first-generation histamine H1-receptor antagonist with anti-cholinergic effect. Diphenhydramine hydrochloride can across the ovine blood-brain barrier (BBB) .

NBQX disodium (FG9202 disodium) is a highly selective and competitive AMPA receptor antagonist. NBQX disodium has neuroprotective and anticonvulsant activity.

DNQX (FG 9041), a quinoxaline derivative, is a selective, potent competitive non-NMDA glutamate receptor antagonist (IC₅₀s = 0.5, 2 and 40 μM for AMPA, kainate and NMDA receptors, respectively).

Indole-2-carboxylic acid (I2CA) is a competitive antagonist of the glycine site of the NMDA receptor (K_i=15 μM, 5-fluoro-I2CA) and an inhibitor of HIV-1 integrase. Indole-2-carboxylic acid is selective for the glycine site of the NMDA receptor and blocks the enhancement of NMDA receptor by competitively inhibiting the binding of glycine to the NMDA receptor. Indole-2-carboxylic acid can also inhibit the strand transfer activity of HIV-1 integrase by chelating Mg²⁺ at the active site of integrase and interacting with the hydrophobic cavity. Indole-2-carboxylic acid can be used in the study of neurological diseases (such as stroke, epilepsy) and HIV-1 infection.

CNQX disodium (FG9065 disodium) is a potent and competitive AMPA/kainate receptor antagonist with IC₅₀s of 0.3 μM and 1.5 μM, respectively. CNQX disodium is a competitive non-NMDA receptor antagonist. CNQX disodium blocks the expression of fear-potentiated startle in rats.

L-Phenylalanine-¹³C₆ is the ¹³C-labeled L-Phenylalanine. L-Phenylalanine ((S)-2-Amino-3-phenylpropionic acid) is an essential amino acid isolated from Escherichia coli. L-Phenylalanine is a α2δ subunit of voltage-dependent Ca+ channels antagonist with a K_i of 980 nM. L-phenylalanine is a competitive antagonist for the glycine- and glutamate-binding sites of N-methyl-D-aspartate receptors (NMDARs) (KB of 573 μM ) and non-NMDARs, respectively. L-Phenylalanine is widely used in the production of food flavors and pharmaceuticals.