2. Signaling Pathways
  3. Membrane Transporter/Ion Channel
    Neuronal Signaling
  4. iGluR
  5. NMDA Receptor Isoform

NMDA Receptor

NMDA receptor (NMDAR) ionotropic glutamate receptors support synaptogenesis, synaptic maturation, long-term plasticity, neuronal network activity, and cognition[1]. Mechanistically, NMDARs act as glutamate-gated, calcium-permeable ion channels that mediate synaptic transmission and underpin learning and memory[2]. Their activation requires coordinated agonist binding, with glutamate binding GluN2 and glycine or D-serine binding GluN1[3]. In disease contexts, abnormal NMDAR-mediated signaling is associated with neurological and psychiatric disorders, while NMDAR dysfunction is implicated in seizure and ischemia models[1][2]. Anti-NMDA receptor encephalitis further links receptor-targeting antibodies with rapidly progressive neuropsychiatric disease mechanisms and experimental models[4]. Compared with related NMDA receptor isoforms, subunit composition creates receptor subtypes with distinct biophysical, pharmacological, and signaling properties[5]. Therefore, GluN2A, GluN2B, GluN2C, GluN2D, and GluN3-containing receptors should be separated in experimental design when subtype-specific function, synaptic plasticity, or disease signaling is tested[5]. For experimental applications, agonists and inhibitors provide mechanistic tools because agonists stabilize ligand-binding-domain gating arrangements, whereas competitive antagonists disrupt receptor activation[2]. D-serine also provides a useful ligand model because it binds GluN1, interacts with GluN2A, and can inhibit NMDAR current at high concentration[3].

NMDA Receptor Related Products (215):

Cat. No. Product Name Effect Purity
  • HY-16940
    24(S)-Hydroxycholesterol
    		Agonist 99.75%
    24(S)-Hydroxycholesterol (24S-OHC), the major brain cholesterol metabolite, plays an important role to maintain homeostasis of cholesterol in the brain. 24(S)-Hydroxycholesterol (24S-OHC) is one of the most efficient endogenous LXR agonist known and is present in the brain and in the circulation at relatively high levels. 24(S)-Hydroxycholesterol (24S-OHC) is a very potent, direct, and selective positive allosteric modulator of NMDARs with a mechanism that does not overlapthat of other allosteric modulators.
  • HY-N2370
    24-Hydroxycholesterol
    		Activator 99.90%
    24-Hydroxycholesterol is a natural sterol, which serves as a positive allosteric modulator of N-Methyl-d-Aspartate (NMDA) receptorsR, and a potent activator of the transcription factors LXR.
  • HY-I0096
    Indole-2-carboxylic acid
    		Antagonist 99.86%
    Indole-2-carboxylic acid (I2CA) is a competitive antagonist of the glycine site of the NMDA receptor (Ki=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.
  • HY-N2072
    Crocetin
    		98.07%
    Crocetin (Transcrocetin) is an aglycone of crocin. Crocetin is an orally active and brain-penetrant. Crocetin shows strong NMDA receptor affinity and channel opening activity. Crocetin can downregulate the proinflammatory cytokines and COX-2 exoression. Crocetin can inhibit apoptosis and activation of MAPK. Crocetin can delay delays brain and body aging. Crocetin can be used for the researches of cancer, neurological disease and inflammation, such as cervical cancer and ischemia.
  • HY-17001
    Flupirtine Maleate
    		Antagonist 99.97%
    Flupirtine (D 9998) Maleate is an orally active, blood-brain barrier-crossing non-opioid analgesic and neuroprotective agent. Flupirtine Maleate is a neuronal potassium channel opener (Kv7 activator), a NMDA receptor antagonist and a GABA receptor activator. Flupirtine Maleate stabilizes blood-brain-barrier integrity, reduces oxidative stress and brain leukocyte infiltration, enhances angioneurogenesis, suppresses calcium influx, stabilizes neuronal resting membrane potential, and counteracts focal cerebral ischemia. Flupirtine Maleate exhibits analgesic, muscle relaxant properties, protects neurons from excitotoxic, ischemic, or cytokine-mediated death. Flupirtine Maleate functions as a non-opioid analgesic without antipyretic or antiphlogistic properties, shows no relevant affinity to opiate receptor. Flupirtine Maleate can be used for the research of focal cerebral ischemia, pain, Alzheimer’s disease, or multiple sclerosis.
  • HY-100807S
    Quinolinic acid-d3
    		Agonist 99.90%
    Quinolinic acid-d3 is the deuterium labeled Quinolinic acid. Quinolinic acid, an endogenous metabolite of tryptophan, is a N-methyl-D-aspartate receptor (NMDA receptor) agonist. Quinolinic acid increases glutamate efflux, induces the generation of ROS, activates nitric oxide synthase, produces excessive NO, leading to calcium ion influx and neuronal apoptosis.
  • HY-N0368
    Linalool,98% (stabilized with MEHQ)
    		Inhibitor 99.04%
    Linalool is a natural monoterpene which is a competitive NMDA receptor antagonist. Linalool is orally active and crosses the blood-brain barrier. Linalool has anticancer, antibacterial, anti-inflammatory, neuroprotective, anxiolytic, antidepressant, anti-stress, cardioprotective, hepatoprotective, nephroprotective and pulmonary protective activities.
  • HY-12882A
    Ifenprodil tartrate
    		Antagonist 99.94%
    Ifenprodil (NP-120) tartrate, a cerebral vasodilator, is a noncompetitive NMDA receptor antagonist. Ifenprodil tartrate exerts high affinity at NR1A/NR2B receptors (IC50=0.34 μM) over 400-fold than at NR1A/NR2A receptors (IC50=146 μM). Ifenprodil tartrate is an α1 adrenergic receptor antagonist. Ifenprodil tartrate inhibits GIRK (Kir3), reduces inward currents through the basal GIRK activity. Ifenprodil tartrate has reliable inhibitory effects against A/H1N1 strains (EC50 of 6.6 µM). Ifenprodil tartrate has neuroprotective, anticonvulsant and antinociceptive effects. Ifenprodil tartrate can be used for the study of cerebrovascular diseases and peripheral arterial obliterative disease.
  • HY-100834
    5,7-Dichlorokynurenic acid
    		Antagonist 99.98%
    5,7-Dichlorokynurenic acid (5,7-DCKA) is a selective and competitive antagonist of the glycine site on NMDA receptor with a KB of 65 nM. 5,7-Dichlorokynurenic acid reduces NMDA-induced neuron injury. 5,7-Dichlorokynurenic acid increases social interaction time, increases open arm exploration time, disinhibits suppressed conflict responding in rodent models. 5,7-Dichlorokynurenic acid exhibits anxiolytic-like activity in rodent models and supports exploration of glycine’s role in NMDA receptor-mediated synaptic transmission.
  • HY-100806S
    Kynurenic acid-d5
    		Antagonist 99.85%
    Kynurenic acid-d5 is the deuterium labeled Kynurenic acid. 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.
  • HY-B0405A
    Bupivacaine hydrochloride
    		Inhibitor 99.85%
    Bupivacaine hydrochloride is a NMDA receptor inhibitor.Bupivacaine can block sodium, L-calcium, and potassium channels.Bupivacaine potently blocks SCN5A channels with the IC50 of 69.5 μM. Bupivacaine hydrochloride can be used for the research of chronic pain.
  • HY-14608S5
    L-Glutamic acid-13C5
    		Agonist 99.81%
    L-Glutamic acid-13C5 is the 13C-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.
  • HY-N0215S8
    L-Phenylalanine-13C6
    		Antagonist 99.8%
    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 Ki 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.
  • HY-17387
    (-)-Huperzine A
    		Antagonist 99.74%
    (-)-Huperzine A (Huperzine A) is an alkaloid isolated from Huperzia serrata, with neuroprotective activity. (-)-Huperzine A is a potent, highly specific, reversible and blood-brain barrier penetrant inhibitor of acetylcholinesterase (AChE), with an IC50 of 82 nM. (-)-Huperzine A also is non-competitive antagonist of N-methyl-D-aspartate glutamate (NMDA) receptor. (-)-Huperzine A is developed for the research of neurodegenerative diseases, including Alzheimer’s disease.
  • HY-12294A
    PEAQX tetrasodium hydrate
    		Antagonist 99.72%
    PEAQX tetrasodium hydrate (NVP-AAM077 tetrasodium hydrate) is a tetrasodium hydrate of PEAQX (HY-12294). PEAQX tetrasodium hydrate is an orally active and selective NMDA antagonist, with IC50 values of 270 nM and 29.6 μM for hNMDAR 1A/2A and hNMDAR 1A/2B, respectively. PEAQX tetrasodium hydrate can promote the activation of caspase-3 and induce cell apoptosis in cortical striatal slice cultures.
  • HY-107512
    Kynurenic acid sodium
    		Antagonist 99.82%
    Kynurenic acid sodium, an endogenous tryptophan metabolite, is a broad-spectrum antagonist targeting NMDA, glutamate, α7 nicotinic acetylcholine receptor. Kynurenic acid sodium is also an agonist of GPR35/CXCR8.
  • HY-B1488
    Tacrine hydrochloride
    		Inhibitor 99.90%
    Tacrine hydrochloride is a potent brain-penetrant inhibitor of both AChE and BChE, with IC50s of 31 nM and 25.6 nM, respectively. Tacrine hydrochloride is also a NMDAR inhibitor, with an IC50 of 26 μM. Tacrine hydrochloride can be used for the research of Alzheimer’s disease.
  • HY-Y0966S8
    Glycine-d5
    		98.0%
    Glycine-d5 is the deuterium 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.
  • HY-P0117
    Tat-NR2B9c
    		Inhibitor 99.89%
    Tat-NR2B9c (Tat-NR2Bct; NA-1) is a postsynaptic density-95 (PSD-95) inhibitor, with EC50 values of 6.7 nM and 670 nM for PSD-95d2 (PSD-95 PDZ domain 2) and PSD-95d1, respectively. Tat-NR2B9c disrupts the PSD-95/NMDAR interaction, inhibiting NR2A and NR2B binding to PSD-95 with IC50 values of 0.5 μM and 8 μM, respectively. Tat-NR2B9c also inhibits neuronal nitric oxide synthase (nNOS)/PSD-95 interaction, and possesses neuroprotective efficacy.
  • HY-N1916
    Coniferyl ferulate
    		Inhibitor 98.73%
    Coniferyl ferulate is an orally active phenolic acid compound. Coniferyl ferulate is a potent inhibitor of glutathione S-transferase (GST) (IC50 = 0.3 μM), which downregulates P-gp expression, induces apoptosis in B-MD-C1 (ADR+/+) cells, and reverses multidrug resistance. Coniferyl ferulate blocks the NMDAR/NR2B-CaMKII-MAPKs signaling pathway, inhibits ROS production and mitochondrial apoptosis, while reshapes the intestinal microbiota and microbial metabolism, ameliorates colonic inflammation and alleviates depressive symptoms in mice. Coniferyl ferulate can alleviate the toxicity of xylene to hematopoietic stem and progenitor cells by targeting Mgst2. Coniferyl ferulate exhibits antibacterial activity against the Gram-positive Bacillus subtilis and Staphylococcus aureus.