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-12115
    NG-nitro-L-arginine
    		Inhibitor 99.78%
    NG-nitro-L-arginine (Nω-nitro-L-arginine) is a NO Synthase inhibitor, with Kis of 0.61 μM (nNOS), 4.28 μM (iNOS), 0.72 μM (eNOS) respectively. NG-nitro-L-arginine inhibits endothelium-derived relaxing factor (EDRF) formation and release. NG-nitro-L-arginine inhibits portal-systemic shunting in portal-hypertensive rats, and increases blood pressure.
    NG-nitro-L-arginine
  • HY-100977
    Dimethoxycurcumin
    		Inhibitor 98.40%
    Dimethoxycurcumin is a derivative of curcumin that has anti-inflammatory and antioxidant activities.
    Dimethoxycurcumin
  • HY-N8307
    Syringaresinol
    		Inhibitor 99.15%
    Syringaresinol is a lignan-type phytochemical with anti-inflammatory activities. Syringaresinol inhibits the NF-κB and AKT signaling pathway in IL-1β-activated mouse chondrocytes. Syringaresinol increases phosphorylation of AMPK, eNOS, and intracellular Ca2+ levels in HUVECs. Syringaresinol attenuates osteoarthritis progression in mice with Destabilization of the Medial Meniscus (DMM)-induced osteoarthritis. Syringaresinol can be used for the study of osteoarthritis (OA).
    Syringaresinol
  • HY-U00432A
    S-MTC dihydrochloride
    		Inhibitor 99.00%
    S-MTC (S-Methyl-L-thiocitrulline) dihydrochloride is a selective type I nitric oxide synthase (NOS) inhibitor.
    S-MTC dihydrochloride
  • HY-101318
    β-Funaltrexamine hydrochloride
    		Inhibitor 99.07%
    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-101175
    3-Bromo-7-nitroindazole
    		Inhibitor 98.12%
    3-Bromo-7-nitroindazole is a potent and selective inhibitor of neuronal nitric oxide synthase (nNOS). 3-Bromo-7-nitroindazole affects the intercellular messenger nitric oxide (NO) synthesis throughout the body and brain. 3-Bromo-7-nitroindazole can be used for the researches of metabolic and neurological disease, such as diabetes, stroke and depression.
    3-Bromo-7-nitroindazole
  • HY-W003969
    Aminopicoline
    		Inhibitor 99.99%
    Aminopicoline (Ascensil) is a potent and nonselective inhibitor of NO synthase (NOS) isoenzymes (iNOS, nNOS, eNOS).
    Aminopicoline
  • HY-B0905A
    Tilmicosin phosphate
    		Inhibitor 98.0%
    Tilmicosin (LY-177370) phosphate is an orally active calcium channel antagonist and macrolide antibiotic with antimicrobial activity. Tilmicosin phosphate mainly acts on the 50S subunit of bacterial ribosomes, inhibiting protein synthesis. Tilmicosin phosphate is effective in the treatment of respiratory diseases in livestock such as cattle, sheep and pigs. In addition, Tilmicosin phosphate has immunomodulatory and anti-inflammatory effects.
    Tilmicosin phosphate
  • HY-N2300
    Kuwanon A
    		Inhibitor 99.69%
    Kuwanon A is a flavone derivative isolated from the root barks of the mulberry tree (Morus alba L.); inhibits nitric oxide production with an IC50 of 10.5 μM.
    Kuwanon A
  • HY-N0577
    Apiin
    		Inhibitor 99.94%
    Apiin, a major constituent of Apium graveolens leaves with anti-inflammatory properties. Apiin shows significant inhibitory activity on nitrite (NO) production (IC50 = 0.08 mg/mL) in-vitro and iNOS expression (IC50 = 0.049 mg/ mL) in LPS-activated J774.A1 cells.
    Apiin
  • HY-126066
    (-)-Syringaresinol
    		Activator 99.95%
    (-)-Syringaresinol is an orally active isomer of syringaresinol (HY-N8307) found in Annona Montana. (-)-Syringaresinol exhibits antioxidant, anti-inflammatory, and anticancer activities. (-)-Syringaresinol can alleviate ulcerative colitis via the PI3K-Akt/MAPK/Wnt signaling pathway. (-)-Syringaresinol inhibits HL-60 cell proliferation by arresting the G1 phase and inducing apoptosis. (-)-Syringaresinol inhibits LPS (HY-D1056)-induced microglial activation by downregulating the NF-κB p65 signaling pathway and its interaction with ERβ, exerting anti-neuroinflammatory effects.
    (-)-Syringaresinol
  • HY-P0117A
    Tat-NR2B9c TFA
    		Inhibitor 99.66%
    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.
    Tat-NR2B9c TFA
  • HY-N6599
    3-Feruloylquinic acid
    		Inhibitor 98.50%
    3-Feruloylquinic acid (3-O-Feruloylquinic acid), a derivative of quinic acid-bound phenolic acid, shows antioxidant and anti-inflammatory activities.
    3-Feruloylquinic acid
  • HY-118700A
    2-Iminobiotin hydrobromide
    		Inhibitor 98.0%
    2-Iminobiotin hydrobromide (Guanidinobiotin hydrobromide) is a biotin (vitamin H or B7) analog. 2-Iminobiotin hydrobromide is a reversible nitric oxide synthases inhibitor with Kis of 21.8 and 37.5 μM for murine iNOS and rat n-cNOS, respectively. 2-Iminobiotin hydrobromide superimposes on hypothermia protects human neuronal cells from hypoxia-induced cell damage.
    2-Iminobiotin hydrobromide
  • HY-B1264
    Celiprolol hydrochloride
    		Activator 98.93%
    Celiprolol (REV 5320) is a potent, cardioselective and orally active β1-andrenoceptor r antagonist with partial β2 agonist activity, with Ki values of 0.14-8.3 μM. Celiprolol has antihypertensive and antianginal activity, and can be used for the research of cardiovascular disease such as high blood pressure.
    Celiprolol hydrochloride
  • HY-145846
    iNOs-IN-1
    		Inhibitor 99.83%
    iNOs-IN-1 (YPW) is a potent inducible nitric oxide synthase (iNOS) inhibitor. iNOs-IN-1 can significantly inhibit the expression of IL-6 and iNOS, as well as reduce LPS-induced NO generation with dose-dependent manner in mouse macrophages. Anti-inflammatory effects.
    iNOs-IN-1
  • HY-123581
    Quinocetone
    		Activator 98.00%
    Quinocetone is an orally active animal feed additive used to increase the meat production of livestock and poultry. Quinocetone exhibits antibacterial activity against a variety of pathogenic microorganisms. Quinocetone exhibits tissue-specific (liver, lymphocyte) toxicity. Quinocetone induces autophagy in cells through the ATF6/DAPK1 pathway. Quinocetone activates the NF-κB and iNOS pathways, leading to cell apoptosis, hepatocyte vacuolar degeneration and fibrosis. Quinocetone can inhibit Nrf2/HO-1 and induce the generation of reactive oxygen species (ROS), leading to oxidative stress and DNA damage.
    Quinocetone
  • HY-113216BS
    Asymmetric-dimethylarginine-d6 dihydrochloride
    		98.30%
    Asymmetric-dimethylarginine-d6 (dihydrochloride) is the deuterium labeled Asymmetric-dimethylarginine dihydrochloride.
    Asymmetric-dimethylarginine-d<sub>6</sub> dihydrochloride
  • HY-N0875
    IKarisoside A
    		Inhibitor 99.44%
    IKarisoside A (Icarisoside-A) is a natural flavonol glycoside and has anti-inflammatory properties.
    IKarisoside A
  • HY-N4314
    Scutellarein tetramethyl ether
    		Inhibitor 99.93%
    Scutellarein tetramethyl ether (4',5,6,7-Tetramethoxyflavone) is a bioactive compound extracted from Eupatorium odoratum. Scutellarein tetramethyl ether exhibits anti-inflammatory, antibacterial, pro-coagulant, and anti-tumor activities. Scutellarein tetramethyl ether exerts its anti-inflammatory effects by modulating the NF-κB pathway and regulates bacterial resistance through the inhibition of efflux pumps. Additionally, Scutellarein tetramethyl ether accelerates coagulation time via the endogenous coagulation pathway. Studies have shown that Scutellarein tetramethyl ether can effectively inhibit the growth of the liver cancer cell line HepG2 (IC50= 20.08 μg/mL).
    Scutellarein tetramethyl ether
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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