1. Immunology/Inflammation
  2. NO Synthase

NO Synthase

Nitric oxide synthases (NOSs) are a family of enzymes catalyzing the production of nitric oxide (NO) from L-arginine. NO synthases catalyze the oxidation of L-arginine to NO and L-citrulline. Mammals contain three NOS isoforms: neuronal NOS (nNOS), inducible NOS (iNOS), and endothelial NOS (eNOS). NO produced from these different NOS isoforms is involved in a wide range of physiologic functions in the nervous, immune, and cardiovascular systems. Unregulated NO production can lead to pathologic conditions such as stroke, inflammation, and hypertension. Therefore, the control of NOS activity by isoform selective NOS inhibitors has great potential for therapeutic treatments of NO-related diseases.

NO Synthase Related Products (68):

Cat. No. Product Name Effect Purity
  • HY-13683
    Mifepristone Inhibitor 98.67%
    Mifepristone (RU486) is a progesterone receptor (PR) and glucocorticoid receptor (GR) antagonist with IC50s of 0.2 nM and 2.6 nM in in vitro assay[1].
  • HY-18729A
    L-NAME hydrochloride Inhibitor 99.07%
    L-NAME hydrochloride inhibits NOS with an IC50 of 70 μM. L-NAME is a precursor to NOS inhibitor L-NOARG which has an IC50 value of 1.4 μM.
  • HY-18732A
    L-NMMA acetate Inhibitor 98.58%
    L-NMMA acetate is a nitric oxide synthase inhibitor of all NOS isoforms including NOS1, NOS2, and NOS3. The Ki values for nNOS (rat), eNOS (human), and iNOS (mouse) are approximately 0.18, 0.4, and 6 µM, respectively.
  • HY-18731
    1400W Dihydrochloride Inhibitor 99.65%
    1400W dihydrochloride is a potent and selective inhibitor of human inducible NO synthase with Ki values of 7 nM.
  • HY-113216
    Asymmetric dimethylarginine Inhibitor >98.0%
    Asymmetric dimethylarginine is an endogenous inhibitor of nitric oxide synthase (NOS), and functions as a marker of endothelial dysfunction in a number of pathological states.
  • HY-79457
    S-Methylisothiourea sulfate Inhibitor
    S-Methylisothiourea sulfate is a potent, selective and competitive inhibitor of inducible nitric oxide synthase (iNOS). S-Methylisothiourea sulfate exerts beneficial effects in rodent models of septic shock[1].
  • HY-N7688
    Regaloside B Inhibitor
    Regaloside B is a phenylpropanoid isolated from Lilium longiflorum. Regaloside B can inhibit the expression of iNOS and COX-2. Regaloside B has anti-inflammatory activity[1][2].
  • HY-19504
    AVE3085 Activator 99.95%
    AVE3085 is a potent endothelial nitric oxide synthase enhancer, used for cardiovascular disease treatment.
  • HY-14536
    Methylene Blue Inhibitor >98.0%
    Methylene blue (Basic Blue 9) is a guanylyl cyclase (sGC), monoamine oxidase A (MAO-A) and NO synthase (NOS) inhibitor. Methylene blue is a vasopressor and is often used as a dye in several medical procedures. Methylene blue has antinociception, antimalarial, antidepressant and anxiolytic activity effects. Methylene Blue has the potential for methemoglobinemias, neurodegenerative disorders and ifosfamide-induced encephalopathytreatment[1][2][3].
  • HY-N0455
    L-Arginine Activator >98.0%
    L-Arginine ((S)-(+)-Arginine) is the substrate for the endothelial nitric oxide synthase (eNOS) to generate NO. L-Arginine is transported into vascular smooth muscle cells by the cationic amino acid transporter family of proteins where it is metabolized to nitric oxide (NO), polyamines, or L-proline[1][2].
  • HY-121526
    S-Nitroso-N-acetyl-DL-penicillamine Agonist >98.0%
    S-Nitroso-N-acetyl-DL-penicillamine (SNAP) is a nitric oxide donor and acts as a stable inhibitor of platelet aggregation[1][2][3][4].
  • HY-B2162
    Chondroitin sulfate
    Chondroitin sulfate, one of five classes of glycosaminoglycans, has been widely used in the treatment of osteoarthritis. Chondroitin sulfate reduces inflammation mediators and the apoptotic process and is able to reduce protein production of inflammatory cytokines, iNOS and MMPs.
  • HY-12119
    GW274150 Inhibitor
    GW274150 is a potent, selective, orally active and NADPH-dependent inhibitor of human inducible nitric oxide synthase (iNOS) (IC50=2.19 μM; Kd=40 nM) and rat iNOS (ED50=1.15 μM). GW274150 also displays less potency for both humans or rats endothelial NOS (eNOS) and neuronal NOS (nNOS). GW274150 exerts a protective role in an acute model of lung injury inflammation[1][2].
  • HY-N1445
    Isoquercetin Inhibitor 99.87%
    Isoquercetin (Quercetin 3-glucoside) is a naturally occurring polyphenol that has antioxidant, anti-proliferative, and anti-inflammatory properties. Isoquercetin alleviates ethanol-induced hepatotoxicity, oxidative stress, and inflammatory responses via the Nrf2/ARE antioxidant signaling pathway[1]. Isoquercetin regulates the expression of nitric oxide synthase 2 (NO2) via modulating the nuclear factor-κB (NF-κB) transcription regulation system. Isoquercetin has high bioavailability and low toxicity, is a promising candidate agent to prevent birth defects in diabetic pregnancies[2].
  • HY-107383
    Tetrahydrobiopterin 99.87%
    Tetrahydrobiopterin is a cofactor of the aromatic amino acid hydroxylases enzymes and also acts as an essential cofactor for all nitric oxide synthase (NOS) isoforms.
  • HY-P0117A
    Tat-NR2B9c TFA Inhibitor 99.67%
    Tat-NR2B9c TFA (Tat-NR2Bct TFA) 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 TFA 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 TFA also inhibits neuronal nitric oxide synthase (nNOS)/PSD-95 interaction, and possesses neuroprotective efficacy[1].
  • HY-12116
    L-NIL Inhibitor 99.26%
    L-NIL is an inducible NO synthase inhibitor, with an IC50 of 3.3 μM for miNOS[1][2][3].
  • HY-N0904
    Ginsenoside C-K Inhibitor >98.0%
    Ginsenoside C-K, a bacterial metabolite of G-Rb1, exhibits anti-inflammatory effects by reducing iNOS and COX-2. Ginsenoside C-K exhibits an inhibition against the activity of CYP2C9 and CYP2A6 in human liver microsomes with IC50s of 32.0±3.6 μM and 63.6±4.2 μM, respectively.
  • HY-102015
    6-Biopterin >98.0%
    6-Biopterin (L-Biopterin), a pterin derivative, is a NO synthase cofactor.
  • HY-100986
    L-NIO dihydrochloride Inhibitor
    L-NIO dihydrochloride is a potent, non-selective and NADPH-dependent nitric oxide synthase (NOS) inhibitor, with Kis of 1.7, 3.9, 3.9 μM for neuronal (nNOS), endothelial (eNOS), and inducible (iNOS), respectively[1][2]. L-NIO dihydrochloride induces a consistentfocal ischemic infarctin rats[2].