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-N1312R
    Sinapaldehyde (Standard)
    		Inhibitor
    Sinapaldehyde is a methoxyphenol and a selective COX-2 inhibitor (IC50: 47.8 µM) that can be extracted from various plants. Sinapaldehyde has antibacterial, anti-inflammatory, and antioxidant activities. Sinapaldehyde can scavenge DPPH free radicals (IC50: 172 μM). Sinapaldehyde is active against both Gram-negative and Gram-positive bacteria.
    Sinapaldehyde (Standard)
  • HY-N10175
    Berkeleyacetal C
    		Inhibitor
    keleyacetal C, a meroterpenoid compound with anti-inflammatory effects via inhibiting NF-κB, ERK1/2 and IRF3 signaling pathways. Berkeleyacetal C significantly inhibits the expression of iNOS and the following NO production by macrophages. Berkeleyacetal C inhibits expression and secretion of key pro-inflammatory factors and chemokines (TNF-α, IL-6, IL-1β, MIP-1α, and MCP-1). Berkeleyacetal C also inhibits activation of neutrophils and reactive oxygen species (ROS) production. Berkeleyacetal C can be used for the study of inflammatory disorders.
    Berkeleyacetal C
  • HY-Y0078R
    Cinnamyl Alcohol (Standard)
    		Inhibitor
    Cinnamyl Alcohol (Standard) is the analytical standard of Cinnamyl Alcohole (HY-Y0078). This product is intended for research and analytical applications. Cinnamyl Alcohol is an active component from chestnut flower, inhibits increased PPARγ expression, exhibits anti-obesity, antioxidant and anti-inflammatory activities.
    Cinnamyl Alcohol (Standard)
  • HY-131898R
    PTIO (Standard)
    		Inhibitor
    PTIO (Standard) is the analytical standard of PTIO. This product is intended for research and analytical applications. PTIO is a specific scavenger of NO and redox mediator. PTIO reacts with •NO to form the corresponding imino nitroxides and •NO2. PTIO enhances organic contaminants oxidation by permanganate.
    PTIO (Standard)
  • HY-N11262
    Sudachitin
    		Inhibitor
    Sudachitin is an orally active compound that potently inhibits mouse PDE1C and human PDE4B, with IC50 values of 5.0 μM and 15.0 μM, respectively. Sudachitin upregulates Sirt1 and PGC‑1α expression in skeletal muscle to regulate energy metabolism and promote mitochondrial biogenesis. Sudachitin improves lipid metabolism, glucose tolerance, insulin sensitivity, energy expenditure, and fatty acid β‑oxidation. Sudachitin activates p38MAPK signaling, induces HSP27 phosphorylation and caspase‑dependent apoptosis, and blocks EGF‑driven keratinocyte migration and proliferation. Sudachitin suppresses LPS‑induced TNF‑α, NO, and iNOS expression in macrophages and shows potent anti‑inflammatory activity. Sudachitin can be used for the research of metabolic syndrome, type 2 diabetes, and psoriasis..
    Sudachitin
  • HY-18731R
    1400W Dihydrochloride (Standard)
    		Inhibitor
    1400W (Dihydrochloride) (Standard) is the analytical standard of 1400W (Dihydrochloride). This product is intended for research and analytical applications. 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 (Standard)
  • HY-W408607
    N-Benzylacetamidine hydrobromide
    		Inhibitor
    N-Benzylacetamidine (hydrobromide) is a acetamidine compound. N-Benzylacetamidine (hydrobromide) is a selective inducible nitric oxide synthase (iNOS) inhibitor with an IC50 of 0.20 μM.
    N-Benzylacetamidine hydrobromide
  • HY-N15347
    Talaromyketide B
    		Inhibitor
    Talaromyketide B is a polyketide compound with anti-inflammatory activity, discovered in the soil bacterium Talaromyces sp. KYS-41. Talaromyketide B inhibits the activation of the NF-κB and MAPK signaling pathways and dose-dependently suppresses pro-inflammatory cytokines, such as IL-1β, IL-6, IL-10, and TNF-α, as well as the transcriptional activity of inflammatory mediators, including iNOS and COX-2. Talaromyketide B holds potential for research in the fields of immunity and inflammatory diseases.
    Talaromyketide B
  • HY-12383R
    Pelubiprofen (Standard)
    		Inhibitor
    Pelubiprofen (Standard) is the analytical standard of Pelubiprofen. This product is intended for research and analytical applications. Pelubiprofen is an orally active anti-inflammatory agent that inhibits COX enzyme activity (with IC50 values of 10.66 and 2.88 μM for COX-1 and COX-2, respectively). Pelubiprofen has significant anti-inflammatory and analgesic effects.
    Pelubiprofen (Standard)
  • HY-N2715A
    (2R)-6-Methoxynaringenin
    		Inhibitor
    (2R)-6-Methoxynaringenin is the R isomer of 6-Methoxynaringenin (HY-N2715). 6-Methoxynaringenin is a flavonoid, that inhibits NO production with an IC50 of 25.8 μM.
    (2R)-6-Methoxynaringenin
  • HY-18252S2
    Avanafil-d4
    		Inhibitor
    Avanafil-d4 (TA1790-d4) is deuterium-labeled Avanafil (HY-18252).
    Avanafil-d<sub>4</sub>
  • HY-138166S
    Rosuvastatin lactone-d6
    		Activator
    Rosuvastatin lactone-d6 is the deuterium labeled Rosuvastatin lactone. Rosuvastatin lactone is a metabolite of Rosuvastatin (HY-17504A), a statin lipid-lowering agent and HMG-CoA inhibitor. Rosuvastatin lactone exhibits endothelium-independent and HMG-CoA reductase-independent vasorelaxant activity in rat aortic rings, and its vasorelaxant effect is jointly mediated by NO produced by inducible nitric oxide synthase (iNOS) located in vascular smooth muscle and activation of potassium channels. Rosuvastatin lactone itself has no lipid-lowering effect.
    Rosuvastatin lactone-d<sub>6</sub>
  • HY-121174
    Alaternin
    		Inhibitor
    Alaternin (Catharticin) is an anthraquinone compound with antioxidant and hepatoprotective activities. Alaternin has an inhibitory activity against hydroxyl radicals generated in a cell-free chemical system (FeSO4/H2O2) with an IC50 value of 3.05 μM. Alaternin exhibits hepatoprotective activity against Tacrine (HY-111338)-induced toxicity in human hepatic HepG2 cells with an EC50 value of 4.02 μM.
    Alaternin
  • HY-N1695
    Demethylregelin
    		Inhibitor
    Demethylregelin (Regelin acid), a triterpene, effectively reduces the expression of iNOS protein and subsequent nitric oxide production induced by lipopolysaccharide (HY-D1056) in RAW264.7 cells. Demethylregelin has anti-inflammatory activities.
    Demethylregelin
  • HY-115410
    NG-Amino-L-arginine hydrochloride
    		Inhibitor
    NG-Amino-L-arginine hydrochloride induces inactivation of the citrulline-forming activity of the nNOS, iNOS, and eNOS isoforms with Ki values of 0.3 μM, 3 μM, and 2.5 μM, respectively.
    NG-Amino-L-arginine hydrochloride
  • HY-N3211
    N-cis-Feruloyl tyramine
    		Inhibitor
    N-cis-Feruloyl tyramine (cis-N-(4-Hydroxyphenethyl) ferulamide) is a natural phenolic compound, exhibits modest inhibitory activity on LPS-activated NO production in RAW 264.7 cells.
    N-cis-Feruloyl tyramine
  • HY-19440R
    Esonarimod (Standard)
    		Control
    Esonarimod (Standard) is the analytical standard of Esonarimod. This product is intended for research and analytical applications. Esonarimod (KE-298) is an antirheumatic agent.
    Esonarimod (Standard)
  • HY-B1041R
    Aminoguanidine hydrochloride (Standard)
    		Inhibitor
    Aminoguanidine (hydrochloride) (Standard) is the analytical standard of Aminoguanidine (hydrochloride). This product is intended for research and analytical applications. Aminoguanidine hydrochloride (Pimagedine hydrochloride) is an inhibitor of diamine oxidase and nitric oxide synthase. Aminoguanidine hydrochloride has a dose-dependent inhibitory effect on apoptosis induced by Doxorubicin (HY-15142). Aminoguanidine hydrochloride has antioxidant properties. Aminoguanidine hydrochloride can be used in diabetic nephropathy research.
    Aminoguanidine hydrochloride (Standard)
  • HY-B1197R
    Amcinonide (Standard)
    		Inhibitor
    Amcinonide (Standard) is the analytical standard of Amcinonide. This product is intended for research and analytical applications. Amcinonide is an inhibitor of NO release (IC50 = 3.38 nM). Amcinonide inhibits NNC-induced expression of the proinflammatory genes iNOS, TNF-α, and IL-1β in glial cells. Amcinonide reduces the numbers of T6+/Ia+ cells with a concomitant increase in T6+/Ia- cells. Amcinonide induces a selective reduction in expression of Ia antigens. Amcinonide can also be studied in research for eczematous dermatitis.
    Amcinonide (Standard)
  • HY-U00187
    NCX1022
    		Activator
    NCX1022 is an NO-releasing derivative of Hydrocortisone, which is the most widely used anti-inflammatory agent for the treatment of skin inflammation.
    NCX1022
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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