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 (93):

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
    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-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-18732A
    L-NMMA acetate Inhibitor
    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-N0455
    L-Arginine Activator
    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-115750
    Nω-allyl-L-arginine Inhibitor
    Nω-allyl-L-arginine is a competitive and reversible inhibitor of bovine brain nitric oxide synthase (nNOS). Nω-allyl-L-arginine can inactivate nNOS in a time-dependent manner. Nω-allyl-L-arginine also is a substrate, producing L-arginine, acrolein, and H2O[1][2].
  • HY-131697
    FeTPPS Inhibitor
    FeTPPS, a 5,10,15,20-tetrakis (4-sulfonatophenyl) porphyrin iron III chloride peroxynitrite decomposition catalyst, possesses evident neuroprotective effects in a experimental model of spinal cord damage[1]. FeTPPS acts as a peroxynitrite scavenger and anti-nitrating agent in vivo. FeTPPS reduces nitric oxide (NO) production and apoptosis process[2].
  • HY-18734
    Carboxy-PTIO Inhibitor
    Carboxy-PTIO is a potent nitric oxide (NO) scavenger that can make a quick reaction with NO to produce NO2. Carboxy-PTIO can prevent hypotension and endotoxic shock through the direct scavenging action against NO in lipopolysaccharide-stimulated rat model[1][2][3].
  • HY-121526
    S-Nitroso-N-acetyl-DL-penicillamine Agonist
    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-14536
    Methylene Blue Inhibitor
    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-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-B1041
    Aminoguanidine hydrochloride Inhibitor
    Aminoguanidine hydrochloride is a diamine oxidase and NO synthase inhibitor, reduces levels of advanced glycation end products (AGEs) through interacting with 3-deoxyglucosone, is an investigational drug for the treatment of diabetic nephropathy.
  • HY-12116
    L-NIL Inhibitor
    L-NIL is an inducible NO synthase inhibitor, with an IC50 of 3.3 μM for miNOS[1][2][3].
  • HY-107383
    Tetrahydrobiopterin 99.87%
    Tetrahydrobiopterin ((Rac)-Sapropterin) 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-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-100954
    2,4-Diamino-6-hydroxypyrimidine Inhibitor
    2,4-Diamino-6-hydroxypyrimidine is a specific GTP cyclohydrolase I inhibitor (the rate-limiting enzyme in de novo pterin synthesis). 2,4-Diamino-6-hydroxypyrimidine blocks Tetrahydrobiopterin (BH4) synthesis and suppresses NO production[1][2].
  • HY-113216
    Asymmetric dimethylarginine Inhibitor
    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-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-136278
    DETA NONOate Activator
    DETA NONOate (NOC-18) is an exogenous nitric oxide (NO) donor. DETA NONOate exerts neuroprotective effects in vitro[1].
  • HY-102015
    6-Biopterin
    6-Biopterin (L-Biopterin), a pterin derivative, is a NO synthase cofactor.