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-N2053
    Physalin L
    		Inhibitor
    Physalin L inhibits LPS-induced NO production in macrophages with the average inhibitory rate of 70.97%. Anti-inflammatory activity.
    Physalin L
  • HY-156241
    Meliadubin B
    		Inhibitor
    Meliadubin B is a natural triterpenoid with significant inflammatory inhibition effect toward superoxide anion generation in human neutrophils (EC50 of 5.54 μM). Meliadubin B inhibits inducible nitric oxide synthase. Meliadubin B shows remarkable inhibition against the rice pathogenic fungus Magnaporthe oryzae with IC50 of 182.50 μM.
    Meliadubin B
  • HY-161513
    iNOS/COX-2-IN-1
    		Inhibitor
    iNOS/COX-2-IN-1 (Compound 12e) is an inhibitor of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS). iNOS/COX-2-IN-1 inhibits the NF-κB and MAPKs signaling pathways and thus exerts anti-inflammatory effects.
    iNOS/COX-2-IN-1
  • HY-150055
    iNOs-IN-3
    iNOs-IN-3 (Compound 2d) is an orally active nitric oxide synthase (iNOS) inhibitor (IC50=3.342 µM). iNOs-IN-3 shows anti-inflammatory activity and can be used in LPS-induced acute lung injury (ALI) research.
    iNOs-IN-3
  • HY-114798
    Rabelomycin
    		Inhibitor
    Rabelomycin is antibiotic, which exhibits antimicrobial activity against gram positive bacteria. Rabelomycin exhibits inhibitory activity against inducible nitric oxide synthase (iNOS) with an IC50 of 63.9 μM.
    Rabelomycin
  • HY-146421
    Anti-inflammatory agent 21
    		Inhibitor
    Anti-inflammatory agent 21 (compound 9o) is an orally active and low cytotoxic anti-inflammatory agent, with an IC50 value of 0.76 μM for NO. Anti-inflammatory agent 21 acts via accumulation ROS and blocks the NF-κB/MAPK signaling pathway. Anti-inflammatory agent 21 can ameliorate cartilage destruction and inflammatory cell infiltration in arthritis rats model.
    Anti-inflammatory agent 21
  • HY-N0152R
    Myricitrin (Standard)
    		Inhibitor
    Myricitrin (Standard) is the analytical standard of Myricitrin. This product is intended for research and analytical applications. Myricitrin, a naturally occurring flavonoid, is an orally active nitric oxide (NO) and PKC inhibitor. Myricitrin has central nervous system activity, including anxiolytic-like action. Myricitrin possesses antioxidant, anti-inflammatory, antifibrotic and anti-malarial effects.
    Myricitrin (Standard)
  • HY-146309
    iNOS-IN-2
    		Inhibitor
    iNOS-IN-2 (Compound 53) is a potent down-regulator of inducible nitric oxide synthase (iNOS) protein. iNOS-IN-2 effectively inhibits the NO production (IC50=6.4 μM). iNOS-IN-2 has a potential therapeutic effect on chronic inflammation.
    iNOS-IN-2
  • HY-173518
    SIN 14
    		Inhibitor
    SIN 14, a derivative of Sinomenine (HY-15122), is an orally active HO-1 activator (KD = 17.2 μM). SIN 14 binds to the catalytic core domain of HO-1 and induces HO-1 activation in catalysis. SIN 14 significantly increases HO-1 stability. SIN 14 has anti-inflammatory effects and inhibits M1 macrophage polarization while promoting M2 polarization in LPS (Lipopolysaccharides)(HY-D1056)-induced RAW264.7 cells. SIN 14 inhibits inflammatory mediator production (eg: NO, IL-6, IL-1β and CCL2, inhibits production of ROS and down-regulates the expression of COX-2 and iNOS. SIN 14 can inhibit RA-related inflammatory edema in collagen-induced arthritis (ClA) mice.
    SIN 14
  • HY-172764
    L-ENIPO hydrochloride
    		Inhibitor
    L-ENIPO (hydrochloride) is an inhibitor of iNOS, nNOS, and eNOS with Ki values of 17, 10.3, and 58.2 μM. L-ENIPO (hydrochloride) exerts reversible tight binding inhibition selective for iNOS with longer incubation time.
    L-ENIPO hydrochloride
  • HY-N13138
    Angulasaponin B
    		Inhibitor
    Angulasaponin B, a natural product, can be obtained from Vigna angularis. Angulasaponin B inhibits nitric oxide production in LPS-activated RAW264.7 macrophages with IC50 values ​​ranging from 13 μM to 24 μM.
    Angulasaponin B
  • HY-N10217
    Paneolilludinic acid
    Paneolilludinic acid is a compound isolated from an endolichenic fungus Cryptomarasmius aucubae. Paneolilludinic acid significantly inhibits nitric oxide (NO) production.
    Paneolilludinic acid
  • HY-B0905S
    Tilmicosin-d3
    		Inhibitor
    Tilmicosin-d3 is the deuterium labeled Tilmicosin. Tilmicosin (LY-177370) is an orally active calcium channel antagonist and macrolide antibiotic with antimicrobial activity. Tilmicosin mainly acts on the 50S subunit of bacterial ribosomes, inhibiting protein synthesis. Tilmicosin is effective in the treatment of respiratory diseases in livestock such as cattle, sheep and pigs. In addition, Tilmicosin has immunomodulatory and anti-inflammatory effects.
    Tilmicosin-d<sub>3</sub>
  • HY-113216R
    Asymmetric dimethylarginine (Standard)
    		Inhibitor
    Hesperetin (Standard) is the analytical standard of Hesperetin. This product is intended for research and analytical applications. Hesperetin is a natural flavanone, and acts as a potent and broad-spectrum inhibitor against human UGT activity. Hesperetin regulates apoptosis.
    Asymmetric dimethylarginine (Standard)
  • HY-N9891
    12-Dehydrogingerdione
    		Inhibitor
    12-Dehydrogingerdione is an inhibitor of NO Synthase. 12-Dehydrogingerdione signi?cantly inhibits LPS-stimulated production of NO, IL-6 and PGE2 in Raw 264.7 cells.
    12-Dehydrogingerdione
  • HY-D0958R
    Methylene blue hydrate (Standard)
    		Inhibitor
    Methylene blue (hydrate) (Standard) is the analytical standard of Methylene blue (hydrate). This product is intended for research and analytical applications. Methylene blue (Basic Blue 9) hydrate 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 hydrate through the nitric oxide syntase/guanylate cyclase signalling pathway to reduce prepulse inhibition. Methylene blue hydrate is a REDOX cycling compound and able to cross the blood-brain barrier. Methylene blue hydrate is a Tau aggregation inhibitor. Methylene blue hydrate reduces cerebral edema, attenuated microglial activation and reduced neuroinflammation.
    Methylene blue hydrate (Standard)
  • HY-108054A
    Cindunistat ((hydrochloride) maleate)
    		Inhibitor
    Cindunistat hydrochloride maleate is a potent, orally active and selective iNOS inhibitor.
    Cindunistat ((hydrochloride) maleate)
  • HY-W007539R
    2,4-Dihydroxybenzaldehyde (Standard)
    		Inhibitor
    2,4-Dihydroxybenzaldehyde (Standard) is the analytical standard of 2,4-Dihydroxybenzaldehyde. This product is intended for research and analytical applications. 2,4-Dihydroxybenzaldehyde is an endogenous metabolite. 2,4-Dihydroxybenzaldehyde is a pharmaceutical intermediate that can be used to synthesize various Schiff base compounds. 2,4-Dihydroxybenzaldehyde exhibits significant anti angiogenic, anti-inflammatory, and analgesic activities. 2,4-Dihydroxybenzaldehyde reduces the production of NO and ROS by inhibiting the expression of iNOS and COX-2. 2,4-Dihydroxybenzaldehyde is commonly used in the study of inflammatory conditions.
    2,4-Dihydroxybenzaldehyde (Standard)
  • HY-159564
    iNOS/COX-2-IN-3
    		Inhibitor
    iNOS/COX-2-IN-3 (compound 7d) is a dual inhibitor of iNOS and COX-2, with potential anti-inflammatory activity against LPS (HY-D1056)-induced RAW 264.7 cells (IC50=3.48 μM). iNOS/COX-2-IN-3 has good plasma stability, oral activity and gastric safety, and its inhibitory activity on iNOS and COX-2 expression is 5.43-fold and 2.37-fold that of Indomethacin (HY-14397), respectively.
    iNOS/COX-2-IN-3
  • HY-N15506
    Cycloneroside E
    		Inhibitor
    Cycloneroside E is a sesquiterpene aminoglycoside compound discovered from Trichoderma sp. SCSIOW21. Cycloneroside E has the activity of inhibiting the production of NO. In macrophage RAW 264.7 cells, its IC50 value for inhibiting the production of NO is 48.0 µM. Cycloneroside E can be used in the research of the anti-inflammatory field.
    Cycloneroside E
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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