2. Signaling Pathways
  3. Immunology/Inflammation
  4. NO Synthase

NO Synthase

Nitric oxide synthases; NOS

NO Synthase

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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 Isoform Specific Products:

NO Synthase Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-18729A
    L-NAME hydrochloride
    		Inhibitor 99.89%
    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.
    L-NAME hydrochloride
  • HY-13683
    Mifepristone
    		Inhibitor 99.83%
    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.
    Mifepristone
  • HY-N0455
    L-Arginine
    		Activator 99.89%
    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. L-Arginine is a potent vasodilator, and can be used to induce experimental acute pancreatitis.
    L-Arginine
  • HY-10230
    Midostaurin
    		Activator 99.91%
    Midostaurin (PKC412; CGP 41251) is an orally active, reversible multi-targeted protein kinase inhibitor. Midostaurin inhibits PKCα/β/γ, Syk, Flk-1, Akt, PKA, c-Kit, c-Fgr, c-Src, FLT3, PDFRβ and VEGFR1/2 with IC50s ranging from 22-500 nM. Midostaurin also upregulates endothelial nitric oxide synthase (eNOS) gene expression. Midostaurin shows powerful anticancer effects.
    Midostaurin
  • HY-107632
    GYY4137
    		Inhibitor 98.08%
    GY4137 is a sustained-release H2S donor possessing vasodilatory, antihypertensive, and anti-inflammatory activities. GY4137 can inhibit cell growth, induce apoptosis, and cause cell cycle arrest by blocking the STAT3 pathway, demonstrating potent anticancer activity.
    GYY4137
  • HY-101318
    β-Funaltrexamine hydrochloride
    		Inhibitor 98.0%
    β-Funaltrexamine (β-FNA) hydrochloride is a selective μ opioid receptor antagonist. β-Funaltrexamine hydrochloride also inhibits cytokine-induced iNOS activation. β-Funaltrexamine hydrochloride inhibits neuroinflammation and ameliorated neuronal degeneration. β-Funaltrexamine hydrochloride has anti-inflammatory and neuroprotective effects and can be used for research of neurodegenerative diseases (eg: stroke)[1][2]
    β-Funaltrexamine hydrochloride
  • HY-169402A
    PDE1-IN-9 hydrochloride
    		Inhibitor
    PDE1-IN-9 (Compound 7a) hydrochloride is a selective inhibitor for phosphodiesterase 1 (PDE1), that inhibits PDE1C with an IC50 of 11 nM. PDE1-IN-9 hydrochloride reduces mRNA expression of IL-1β, IL-6, TNF-α and iNOS, inhibits the production of nitric oxide (NO) and reactive oxygen species (ROS). PDE1-IN-9 hydrochloride exhibits good metabolic stability in rat liver microsomes.
    PDE1-IN-9 hydrochloride
  • HY-W768336
    Gluconate-13C6 sodium
    Gluconate sodium-13C6 (D-Gluconic acid sodium salt-13C6) is the 13C-labeled Gluconate sodium (HY-B1092A). Gluconate sodium (D-Gluconic acid sodium salt) is an orally active glucose derivative. Gluconate sodium reduces nitric oxide and inflammatory cytokines (IL-1β and IL-6). Gluconate sodium inhibits ERK phosphorylation. Gluconate sodium has antioxidant and antiplatelet activation activities. Gluconate sodium has antitumor activity against colorectal cancer. Gluconate sodium improves osteoarthritis, intestinal damage and acute lung injury.
    Gluconate-<sup>13</sup>C<sub>6</sub> sodium
  • HY-P1956
    Human serum albumin
    		Inhibitor 99.9%
    Human serum albumin (HSA) is the most abundant protein in plasma and is a major determinant of plasma oncotic pressure. Human serum albumin exhibits antioxidant, anticoagulant, anti-inflammatory, anti-platelet aggregation activities as well as colloid osmotic action. Human serum albumin can block the inhibitory effect of GML on human T cells, providing protective function for T cells. Human serum albumin is also associated with cardiovascular diseases and can partially prevent the LPS (HY-D1056) induced oxidative stress, as well as the upregulation of NF-κB, NF-κB, and peroxynitrite (ONOO−) in the vascular wall, contributing to the reduction of blood pressure.
    Human serum albumin
  • HY-107690
    DMPO
    		Activator 99.98%
    DMPO is a cell permeable hydrophillic spin trap agent for superoxide detection.
    DMPO
  • HY-146245C
    ODN 1826 sodium
    		Inducer 99.51%
    ODN 1826 sodium is a class B CpG ODN (oligodeoxynucleotide) and TLR9 agonist. ODN 1826 sodium induces NO and iNOS production and enhances Apoptosis. ODN 1826 sodium enhances immune surveillance. ODN 1826 sodium increases aortic atherosclerotic plaque size. ODN 1826 sodium has antitumor activity against lung cancer, glioma and melanoma.
    ODN 1826 sodium
  • HY-146245
    ODN 1826
    		Inducer 99.69%
    ODN 1826 is a class B CpG ODN (oligodeoxynucleotide) and TLR9 agonist. ODN 1826 induces NO and iNOS production and enhances Apoptosis. ODN 1826 enhances immune surveillance. ODN 1826 increases aortic atherosclerotic plaque size. ODN 1826 has antitumor activity against lung cancer, glioma and melanoma.
    ODN 1826
  • HY-136278
    DETA NONOate
    		Activator 98.10%
    DETA NONOate (NOC 18) is an exogenous nitric oxide (NO) donor. DETA NONOate shows a slow release normal amounts of NO and long-acting.
    DETA NONOate
  • HY-18731
    1400W Dihydrochloride
    		Inhibitor 99.94%
    1400W dihydrochloride is the dihydrochloride form of 1400W (HY-18730). 1400W is a slow, tight binding, and highly selective inducible nitric-oxide synthase (iNOS) inhibitor, with a Kd value ≤ 7 nM. 1400W inhibits iNOS induction in microglial cells, and reduces generation of NO, thereby mitigating oxidative stress and neuronal cell apoptosis in the rat cerebral cortex, and improving the spatial memory dysfunction caused by acute hypobaric hypoxia-reoxygenation.
    1400W Dihydrochloride
  • HY-N1445
    Isoquercitrin
    		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. 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.
    Isoquercitrin
  • HY-121526
    S-Nitroso-N-acetyl-DL-penicillamine
    		Agonist 98.76%
    S-Nitroso-N-acetyl-DL-penicillamine (SNAP) is a nitric oxide donor and acts as a stable inhibitor of platelet aggregation.
    S-Nitroso-N-acetyl-DL-penicillamine
  • HY-154629
    Sesame Oil
    		Inhibitor ≥98.0%
    Sesame Oil is a vegetable oil. Sesame Oil can be extracted from the seeds of Sesamum indicum L. Sesame Oil decreases NF-κB, aspartate aminotransferase, alanine aminotransferase, IL-1β, IL-4 and nitric oxide. Sesame Oil has antitumor activity against malignant melanoma. Sesame Oil has protective effects against liver damage caused by various agents such as Cisplatin (HY-17394) and Acetaminophen (HY-66005). Sesame Oil shows antinociceptive and anti-inflammatory activities.
    Sesame Oil
  • 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 through the nitric oxide syntase/guanylate cyclase signalling pathway to reduce prepulse inhibition. Methylene blue is a REDOX cycling compound and able to cross the blood-brain barrier. Methylene blue is a Tau aggregation inhibitor. Methylene Blue is a photosensitizer and redox agent. Methylene blue reduces cerebral edema, attenuated microglial activation and reduced neuroinflammation.
    Methylene Blue
  • HY-17007
    Saquinavir
    		Inhibitor 99.56%
    Saquinavir (Ro 31-8959) is an orally active HIV protease inhibitor that can be used in the research of AIDS. Saquinavir also has anti-inflammatory activity and can induce apoptosis of human red blood cells.
    Saquinavir
  • HY-101410
    SDMA
    		Inhibitor ≥98.0%
    SDMA (Symmetric dimethylarginine) is an endogenous inhibitor of nitric oxide (NO) synthase activity. SDMA, a novel kidney biomarker, permits earlier diagnosis of kidney disease than traditional creatinine testing.
    SDMA
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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