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-N3364
    Lucidone
    		Inhibitor
    Lucidone, an anti-inflammatory agent that can be isolated from the fruit of Lindera erythrocarpa Makino. Lucidone inhibits LPS-induced NO and PGE2 production in RAW 264.7 mouse macrophages. Lucidone also decreases TNF-α secretion, iNOS and COX-2 expression. Lucidone prevents NF-κB translocation and inhibits JNK and p38MAPK signals. Lucidone also has inhibitory activity against Dengue virus (DENV) (EC50=25 μM).
    Lucidone
  • HY-P10586
    Macrophage-activating lipopeptide 2
    		Inducer
    Macrophage-activating lipopeptide 2 (MALP-2) is an agonist of Toll like receptors TLR-2/TLR-6. Macrophage-activating lipopeptide-2 can enhance endothelial nitric oxide synthase (eNOS) phosphorylation and endothelial cell release of NO, thereby improving vasodilation. Macrophage-activating lipopeptide-2 can enhance endothelial adhesion of white blood cells and improve perfusion recovery and collateral growth in the hind limbs of hypercholesterolemic Apoe deficient mice undergoing experimental femoral artery ligation (FAL).
    Macrophage-activating lipopeptide 2
  • HY-178144
    FPR2 agonist 5
    		Inhibitor
    FPR2 agonist 5 is a selective Formyl Peptide Receptor 2 (FPR2) agonist. FPR2 agonist 5 induces Ca2+ mobilization in FPR2-HL60 transfected cells with an EC50 of 1.2 μM and causes FPR2 desensitization with an IC50 of 0.32 μM. FPR2 agonist 5 exerts neuroprotective effects by mitigating LDH release, NO production, IL-1β, IL-6, IL-33, and IL-10 levels in LPS (HY-D1056)-induced mouse primary microglial cells. FPR2 agonist 5 can be used for the study of neuroinflammatory-related diseases.
    FPR2 agonist 5
  • HY-172977
    FGA139
    		Inhibitor
    FGA139 is a cysteine proteases inhibitor with IC50 values of 4.98/3.14 μM for cathepsin B/L. FGA139 reduces LPS-induced NO production in RAW264.7 cells and tumor necrosis factor (TNFα) levels in microglia, and has anti-oxidative stress and anti-inflammatory activities. FGA139 promotes the secretion of neuroprotective metabolites purine and linoleic acid by LPS-stimulated microglia. FGA139 can be used in neuroinflammatory diseases research.
    FGA139
  • HY-N12570
    Isoarundinin I
    Isoarundinin I is a stilbene compound that can be isolated from Arundinu bambusifolia.
    Isoarundinin I
  • HY-101304
    S-Isopropylisothiourea hydrobromide
    		Inhibitor 98.0%
    S-Isopropylisothiourea hydrobromide (S-isopropyl ITU; IPTU) is a blood-brain barrier (BBB) penetrant NOS inhibitor with IC50 values of 0.66, 0.75 and 0.29 μM against mouse spinal cord, cerebellar, bovine aortic and porcine endothelial cell NOS. S-Isopropylisothiourea exhibits a significant blood pressure-raising effect without damaging the perfusion of vital organs and can also inhibit the late-phase pain response induced by formalin. S-Isopropylisothiourea hydrobromide is used in the researchs for hemorrhagic shock and pain response based on NOS.
    S-Isopropylisothiourea hydrobromide
  • HY-151188
    DHU-Se1
    		Inhibitor
    DHU-Se1 is a potent anti-inflammatory agent. DHU-Se1 can stimulate macrophages to release the reactive selenium compound and reduce the expression of cellular inflammatory factors (eg: iNOS and TNF-α). DHU-Se1 alleviate the process of inflammation by blocking the polarization of macrophages from M0 to M1.
    DHU-Se1
  • HY-N3392
    Lethedoside A
    		Inhibitor
    Lethedoside A is a natural flavonoid that shows inhibitory activity for LPS-induced NO production in RAW 264.7 cells.
    Lethedoside A
  • HY-W751179
    Midostaurin-13C6
    Midostaurin-13C6 (PKC412-13C6) is the 13C-labeled Midostaurin (HY-10230). 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-<sup>13</sup>C<sub>6</sub>
  • HY-106981
    Orazipone
    		Inhibitor
    Orazipone (OR 1384) is a small molecule immunomodulator with strong anti-inflammatory properties. Orazipone exerts its immunomodulatory effect by forming reversible thiol complexes, which bind to intracellular signaling proteins and the thiol groups of glutathione. Orazipone exhibits potent anti-eosinophilic activity by inducing apoptosis. Orazipone inhibits activation of inflammatory transcription factors NF-kB and STAT 1 and decreases inducible iNOS expression and NO production in response to inflammatory stimuli. Orazipone reduces NADPH oxidase activity and thereby decreases ROS production. Orazipone has a protective effect in intestinal radiation injury.
    Orazipone
  • HY-D2996
    BOD-NH-SC
    BOD-NH-SC is a dual-response fluorescent reporter molecule exhibiting activatable NIR II fluorescence, with a primary absorption peak at 664 nm. BOD-NH-SC detects the dynamic alternation of NO and H2S in living cells.
    BOD-NH-SC
  • HY-N17239
    Oleracone
    		Inhibitor
    Oleracone is a type of alkaloid that can be found in Portulaca oleracea L.. Oleracone exhibits a significant anti-inflammatory effect in the RAW 264.7 macrophage model induced by LPS (HY-D1056), capable of inhibiting NO production and significantly suppressing the secretion of pro-inflammatory cytokines TNF-α, IL-6, and prostaglandin E₂ (PGE₂). Oleracone can be used for the study of inflammatory diseases.
    Oleracone
  • HY-W251598I
    Sodium bicarbonate, meets analytical specification of Ph. Eur., BP, USP, FCC, E500
    Sodium bicarbonate, meets analytical specification of Ph. Eur., BP, USP, FCC, E500 is an inorganic salt that is neutral to slightly alkaline and easily decomposes when exposed to moisture in the air. Sodium bicarbonate can maintain the pH of the culture medium, thereby affecting the expression of inducible nitric oxide synthase (iNOS) and nitric oxide (NO) production in macrophages and reversing the acidosis of the tumor microenvironment. Sodium bicarbonate is widely used in the fields of food, medicine, cosmetics, etc. Its main uses include buffers, flavoring agents, disinfectants, pharmaceuticals, and proton gradient regulators. Sodium bicarbonate is also commonly used as an antacid to inhibit gastrointestinal diseases, neutralize gastric acid, and reduce gastric discomfort.
    Sodium bicarbonate, meets analytical specification of Ph. Eur., BP, USP, FCC, E500
  • HY-106162A
    ONO-1714
    		Inhibitor
    ONO-1714 is an orally active nitric oxide synthase inhibitor. ONO-1714 attenuates endotoxin-induced acute lung injury, reduces intestinal ischemia–reperfusion injury, represses biliary carcinogenesis.
    ONO-1714
  • HY-155820
    Anti-inflammatory agent 54
    		Inhibitor
    Anti-inflammatory agent 54 (compound 9c) is a derivative of Coixol and has anti-inflammatory activity. Anti-inflammatory agent 54 inhibits the NF-κB pathway and downregulates the expression of iNOS, TNF-α, IL-6 and IL-1β. Anti-inflammatory agent 54 inhibits LPS-induced nitric oxide (NO) production in RAW264.7 macrophages (IC50: 2.4 μM) and exerts in vivo anti-inflammatory activity in a mouse auricular edema model.
    Anti-inflammatory agent 54
  • HY-N16764
    (rel)-Salcolin A
    		Activator
    (rel)-Salcolin A is a flavonoid lignan compound with anticancer, anti-inflammatory, and neuroprotective activities. (rel)-Salcolin A has IC50 values ??of 66.69 μM and 56.12 μM against anaplastic thyroid carcinoma cells (HTH83) and papillary thyroid carcinoma cells (TPC1), respectively. (rel)-Salcolin A also inhibits LPS-induced NO production with an IC50 of 14.65 μM. (rel)-Salcolin A exerts its effects by inducing necroptosis in thyroid cancer cells, inhibiting the production of the inflammatory factor NO, and protecting against glutamate-induced neuronal cell damage, with a neuroprotective E50 of 47.44 μM. (rel)-Salcolin A can be used in research related to thyroid cancer, anti-inflammation, and neuroprotection. (rel)-Salcolin A can be naturally extracted from the leaves of Casearia arborea and the stems of Zea mays (corn).
    (rel)-Salcolin A
  • HY-113216S
    Asymmetric dimethylarginine-d7 hydrochloride hydrate
    Asymmetric dimethylarginine-d7 (hydrochloride hydrate) is the deuterium labeled Asymmetric dimethylarginine. Asymmetric dimethylarginine is an endogenous inhibitor of nitric oxide synthase (NOS), and functions as a marker of endothelial dysfunction in a num
    Asymmetric dimethylarginine-d<sub>7</sub> hydrochloride hydrate
  • HY-N2989
    3-O-Acetyl-16α-hydroxydehydrotrametenolic acid
    		Inhibitor 98.58%
    3-O-Acetyl-16α-hydroxydehydrotrametenolic acid, an anti-inflammatory triterpenoid, inhibits NO production and iNOS expression in LPS-stimulated Raw264.7 cells.
    3-O-Acetyl-16α-hydroxydehydrotrametenolic acid
  • HY-185709
    2-ARA-LysoPtdEtn
    		Inhibitor
    2-ARA-LysoPtdEtn (1-Lyso-2-arachidonoyl-sn-glycero-3-phosphoethanolamine) is an orally active polyunsaturated acyl lysophosphatidylethanolamine. 2-ARA-LysoPtdEtn diminishes formation of LTC4, LTB4, and 12-HETE. 2-ARA-LysoPtdEtn lowers levels of IL-1β, IL-6, TNF-α, and NO. 2-ARA-LysoPtdEtn augments IL-10 levels and upgrades formation of 15-HETE and LXA4. 2-ARA-LysoPtdEtn can be used for the research of peritonitis.
    2-ARA-LysoPtdEtn
  • HY-U00432
    S-MTC
    		Inhibitor
    S-MTC is a selective type I nitric oxide synthase (NOS) inhibitor.
    S-MTC
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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