CGP 37849 is a potent, competitive and orally active N-methyl-D-aspartate (NMDA) receptor antagonist. CGP 37849 is an anticonvulsant in rodents and has antidepressant and anxiolytic-like effects[1].
NMDA-IN-1 is a potent and NR2B-selective NMDA antagonist with Ki of 0.85 nM; NR2B Ca2+ influx IC50 is 9.7 nM; no activities on NR2A, NR2C, NR2D, hERG-channel and α1-adrenergic receptor.Preparation of 2-[(4-benzyl)-1-piperidinyl)methyl]benzimidazole-5-ols as NMDA NR2B receptor antagonists for the treatment of neuropathic pain.By McCauley, James A.; Claremon, David A.; Liverton, Nigel J. From PCT Int. Appl. (2004), WO 2004048364 A1 20040610. NR2B-Selective N-Methyl-D-aspartate Antagonists: Synthesis and Evaluation of 5-Substituted BenzimidazolesBy McCauley, John A.; Theberge, Cory R.; Romano, Joseph J.; Billings, Susan B.; Anderson, Kenneth D.; Claremon, David A.; Freidinger, Roger M.; Bednar, Rodney A.; Mosser, Scott D.; Gaul, Stanley L.; et alFrom Journal of Medicinal Chemistry (2004), 47(8), 2089-2096.
Piracetam is a cyclic derivative of the neurotransmitter gamma-aminobutyric acid (GABA), used in treatment of a wide range of cognitive disorders.Target: OthersPiracetam is able to significantly decrease the fusogenic and destabilising effect of Abeta 29-42, in a concentration-dependent manner. Preincubation of piracetam, at a piracetam/peptide ratio of 960, during 20 min before the addition of Abeta 29-42 prevents almost completely the mixture of the two fluorescent probes. Preincubation of piracetam with lipids prevents almost completely the release of calcein induced by the peptide in a dose-dependent fashion (piracetam/peptide ratios from 9.6 to 960) [1]. Piracetam (< 1.0 mM) preincubated with brain membranes enhances membrane fluidity in aged mice, rats and humans, as indicated by decreased anisotropy of the membrane-bound fluorescence probe 1,6-diphenyl-1,3,5-hexatriene (DPH). Piracetam (300 mg/kg once daily) significantly increases membrane fluidity in some brain regions of young and aged rats, but has no measurable effect on membrane fluidity in the young rats [2]. Piracetam (300 mg/kg daily for 6 weeks) improves active avoidance learning in the aged rats only and elevates membrane fluidity in all brain regions except the cerebellum in the aged rats. Piracetam (300 mg/kg daily for 6 weeks) also improves NMDA receptor density in the hippocampus and on muscarinic cholinergic receptor densities in the frontal cortex and the striatum and to a lesser extent in the hippocampus of rats [3].
Orphenadrine citrate is a NMDA receptor antagonist with Ki of 6.0 +/- 0.7 μM, HERG potassium channel blocker.Target: NMDA ReceptorOrphenadrine has been used as an antiparkinsonian, antispastic and analgesic drug. Orphenadrine inhibits [3H]MK-801 binding to the phencyclidine (PCP) binding site of the N-methyl-D-aspartate (NMDA)-receptor in homogenates of postmortem human frontal cortex with a Ki-value of 6.0 +/- 0.7 microM. The NMDA receptor antagonistic effects of orphenadrine were assessed using concentration- and patch-clamp techniques on cultured superior colliculus neurones. Orphenadrine blocked open NMDA receptor channels with fast kinetics and in a strongly voltage-dependent manner. The IC50-value against steady state currents at -70 mV was 16.2 +/- 1.6 microM (n = 6). Orphenadrine exhibited relatively fast, concentration-dependent open channel blocking kinetics (Kon 0.013 +/- 0.002 10(6) M-1S-1) whereas the offset rate was concentration-independent (Koff 0.230 +/- 0.004 S-1) [1]. Orphenadrine competitively inhibited [3H]nisoxetine binding in rat vas deferens membranes (Ki = 1.05+/-0.20 microM). It can be concluded that orphenadrine, at low micromolar concentrations, interacts with the noradrenaline reuptake system inhibiting its functionality and thus potentiating the effect of noradrenaline [2].
MRZ 2-514 is an antagonist of the strychnine-insensitive modulatory site of the NMDA receptor (glycineB), with Ki of 33 μM.
Meclofenoxate hydrochloride, an ester of dimethylethanolamine (DMAE) and 4-chlorophenoxyacetic acid (pCPA), has been shown to improve memory, have a mentally stimulating effect, and improve general cognition.IC50 value: Target: nootropicMeclofenoxate, administered in a dose of 50 mg/kg twice daily for 7 days using the maze-training method, increased the number of responses to the conditioned stimulus, when retention tests were made 24 hours and 7 days after training, whereas citicholine, applied in the same way in a dose of 10 mg/kg, shortened the latency of the responses with reinforcement during the training and increased the number of correct responses to the conditioned stimulus in retention tests 7 days after the training [1]. Meclofenoxate appears to increase the consolidation of new information into long-term memory, but does not affect other aspects of remembering [2].
Eliprodil(SL-820715) is a non-competitive NR2B-NMDA receptor antagonist(IC50=1 uM), less potent for NR2A- and NR2C-containing receptors(IC50> 100 uM).IC50 value:Target: NR2B-NMDA antagonistHuman N-type Ca2+ channel currents were inhibited by ifenprodil and eliprodil with IC50 values of 50 microM and 10 microM respectively whereas P-type Ca2+ channel currents were inhibited reversibly by ifenprodil and eliprodil with approximate IC50 values of 60 microM and 9 microM respectively. eliprodil (1 microm) produced a moderate reverse rate-dependent prolongation of the action potential duration (7.4+/-1.5, 8.9+/-2.1 and 9.9+/-1.8% at cycle lengths of 300, 1000 and 5000 ms, respectively; n=9).
(S)-(-)-5-Fluorowillardiine Hcl is a potent and specific AMPAR agonist.
JAMI1001A is a positive allosteric modulator of AMPA receptor. JAMI1001A efficaciously modulates AMPA receptor deactivation and desensitization of both flip and flop receptor isoforms[1].
DQP-26 is a potent NMDAR negative allosteric modulator with IC50 values of 0.77 μM and 0.44 μM for GluN2C and GluN2D, respectively. DQP-26 has the potential for NMDAR-associated neurological disease research[1].
Dalzanemdor (SAGE-718) is a N-methyl-D-aspartate (NMDA) receptor positive allosteric modulator[1].
Midafotel (SDZ-EAA 494) is a potent and comprtitive NMDA antagonist with an ED50 value of 39 nM. Midafotel causes intense stereotyped behaviors. Midafotel shows neuroprotective effects[1][2][3].
GNE 0723 is a brain permeable positive allosteric modulator of NMDAR, with an EC50 of 21 nM for GluN2A, 7.4 and 6.2 μM for GluN2C and GluN2D, respectively.
Neu2000 is an uncompetitive N-methyl-D-aspartate (NMDA) receptor antagonist.
(R)-(+)-HA-966 ((+)-HA-966) is a partial agonist/antagonist of glycine site of the N-methyl-D-aspartate (NMDA) receptor complex. (R)-(+)-HA-966 selectively blocks the activation of the mesolimbic dopamine system by amphetamine[1][2]. (R)-(+)-HA-966 can cross the blood-brain barrier and has the potential for neuropathic and acute pain[3].
Lanicemine (AZD6765) is a low-trapping NMDA channel blocker with a binding (Ki) of 0.56-2.1 μM[1].
NYX-2925 is a Novel NMDA Receptor-Specific Spirocyclic-β-Lactam That Modulates Synaptic Plasticity Processes Associated with Learning and Memory.
Coluracetam(MKC-231) is a new choline uptake enhancer.IC50 value:Target:in vitro: MKC-231 (10(-10)-10(-6) moll) significantly increased high affinity choline uptake (HACU) when it was incubated with the hippocampal synaptosomes of ethylcholine mustard aziridinium ion (AF64A) treated rats, but not of normal rats. MKC-231 did not affect the AChE activity, [3H]- quinuclidinyl benzilate binding, and [3H]-pirenzepine binding [1].in vivo: Oral administration of MKC-231 (1-10 mg/kg) significantly improved the learning deficits in the Morris' water maze of AF64A-treated rats, but it did not produce any significant side effects, like tremor, salivation or hypothermia, which were observed in rats treated with high doses of tacrine [1]. In acute behavioral experiments, MKC-231 and THA had no significant effect on AF64A-induced memory deficits at any doses tested (0.3, 1.0 and 3.0 mg/kg), whereas Dup 996, at a dose of 1.0 mg/kg, significantly improved memory deficits. In chronic experiments, MKC-231 improved memory deficit at all doses tested (0.3, 1.0, or 3.0 mg/kg p.o., once daily for 11 days) and Dup 996 did so only at a dose of 3.0 mg/kg, whereas THA did not improve memory deficit at any doses tested [2].
Deudextromethorphan (AVP-786) hydrobromide hydrate is a deuterated form of dextromethorphan/quinidine (AVP-923, Nuedexta). Deudextromethorphan hydrobromide hydrate, a glutamate-targeting agent, is an orally active N-methyl-D-aspartate (NMDA) receptor antagonist. Deudextromethorphan hydrobromide hydrate can be used for the research of Pseudo-Bulbar Affect, traumatic brain injury, behavioral disinhibition and agitation in AD[1][2][3].
Lanicemine (AZD6765) dihydrochloride is a low-trapping NMDA channel blocker (Ki of 0.56-2.1 μM for NMDA receptor; IC50s of 4-7 μM and 6.4 μM in CHO and Xenopus oocyte cells, respectively). Antidepressant effects[1].
Radiprodil (RGH-896) is an orally active and selective NMDA NR2B antagonist. A potential therapeutic agent in treatment of neuropathic pain and possibly other chronic pain conditions[1].
NBQX disodium (FG9202 disodium) is a highly selective and competitive AMPA receptor antagonist. NBQX disodium has neuroprotective and anticonvulsant activity[1].
Glycine-1-13C,15N is the 13C- and 15N-labeled Glycine. Glycine is an inhibitory neurotransmitter in the CNS and also acts as a co-agonist along with glutamate, facilitating an excitatory potential at the glutaminergic N-methyl-D-aspartic acid (NMDA) receptors.
Glycine-13C2 is the 13C-labeled Glycine. Glycine is an inhibitory neurotransmitter in the CNS and also acts as a co-agonist along with glutamate, facilitating an excitatory potential at the glutaminergic N-methyl-D-aspartic acid (NMDA) receptors.
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[1]. CNQX disodium blocks the expression of fear-potentiated startle in rats[5].
Indole-2-carboxylic acid-13C is the 13C-labeled Indole-2-carboxylic acid. Indole-2-carboxylic acid is a strong inhibitor of lipid peroxidation. Indole-2-carboxylic acid (I2CA) specifically and competitively inhibits the potentiation by glycine of NMDA-gated current[1][2].
Conantokin-T is a γ-carboxyglutamate-containing, N-methyl-D-aspartate (NMDA) antagonist peptidewith an IC50 value of 2 μM. Conantokin-T inhibits NMDA receptor-mediated calcium influx in central nervous system neurons. Conantokin-T can be purified from the venom of the fish-hunting cone snail, Conus tulipa[1].
3,5-Dihydroxy-2-naphthoic acid is a Naphthoic acid derivative. Naphthoic acid is a NMDA receptor allosteric modulator[1].
L-Glutamic acid-13C5,d5,15N is the deuterium, 13C-, and 15-labeled L-Glutamic acid. L-Glutamic acid acts as an excitatory transmitter and an agonist at all subtypes of glutamate receptors (metabotropic, kainate, NMDA, and AMPA). L-Glutamic acid shows a direct activating effect on the release of DA from dopaminergic terminals.
4′-Demethylnobiletin is a bioactive metabolite that activates the PKA/ERK/CREB signaling pathway, enhances CRE-mediated transcription in hippocampal neurons, and reverses memory impairment associated with NMDA receptor antagonism by stimulating ERK signaling[1].