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-69019A
    7-Nitroindazole sodium
    		Inhibitor
    7-Nitroindazole sodium is a selective and BBB-penetrable inhibitor of nitric oxide synthase (NOS). 7-Nitroindazole sodium can inhibit the activity of central NOS with an IC50 of 0.47 μM in the cerebellum of mice. 7-Nitroindazole sodium has anti-injurious and neuroprotective properties.
    7-Nitroindazole sodium
  • HY-N0904R
    Ginsenoside C-K (Standard)
    		Inhibitor
    Ginsenoside C-K (Standard) is the analytical standard of Ginsenoside C-K. This product is intended for research and analytical applications. Ginsenoside C-K, a bacterial metabolite of G-Rb1, exhibits anti-inflammatory effects by reducing iNOS and COX-2. Ginsenoside C-K exhibits an inhibition against the activity of CYP2C9 and CYP2A6 in human liver microsomes with IC50s of 32.0±3.6 μM and 63.6±4.2 μM, respectively.
    Ginsenoside C-K (Standard)
  • HY-N8428
    Canophyllal
    		Inhibitor
    Canophyllal is a triterpene that can be isolated from the leaves of Elsholtzia ciliata. Canophyllal weakly inhibits the production of NO.
    Canophyllal
  • HY-N11548
    Inflexuside A
    		Inhibitor
    Inflexuside A, an abietane diterpenoid, can be isolated from the aerial parts of Isodon inflexus. Inflexuside B strongly inhibits lipopolysaccharide (LPS)-activated NO production (NO Synthase) in RAW264.7 macrophages.
    Inflexuside A
  • HY-N1382R
    Asperuloside (Standard)
    		Inhibitor
    Asperuloside (Standard) is the analytical standard of Asperuloside. This product is intended for research and analytical applications. Asperuloside is an iridoid isolated from Hedyotis diffusa, with anti-inflammatory activity. Asperuloside inhibits inducible nitric oxide synthase (iNOS), suppresses NF-κB and MAPK signaling pathways.
    Asperuloside (Standard)
  • HY-P10092
    SP6
    		Activator
    SP6 exertes an antihypertensive effect through vascular NO regulation.
    SP6
  • HY-172102
    NLRP3-IN-68
    		Inhibitor
    NLRP3-IN-68 (Compound 2d) is a 1,3,4-oxadiazole derivative. NLRP3-IN-68 has strong anti-inflammatory and antioxidant activities, which can inhibit inflammatory cytokines secretion, iNOS expression and NLRP3 inflammasome activation. NLRP3-IN-68 can be used in the research of anti-inflammatory drugs.
    NLRP3-IN-68
  • HY-W670564A
    (4S)-10-Nor-calamenen-10-one
    		Inhibitor
    (4S)-10-Nor-calamenen-10-one (Compound 15) enhances LPS-induced NO production by microglia. (4S)-10-Nor-calamenen-10-one is an eudesmane sesquiterpene that can be isolated from Alpinia oxyphylla.
    (4S)-10-Nor-calamenen-10-one
  • HY-13683S2
    Mifepristone-d6
    		Inhibitor
    Mifepristone-d6 is deuterated labeled Mifepristone (HY-13683). 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-d<sub>6</sub>
  • HY-178983
    SHP2-IN-45
    		Inhibitor
    SHP2-IN-45 is a potent, highly selective, and orally effective SHP2 allosteric inhibitor. SHP2-IN-45 significantly reduce the expression of IL-6, TNF-α, IL-1β, and iNOS mRNA. SHP2-IN-45 inhibits polarization of M1 macrophages. SHP2-IN-45 can inhibit the NF-κB pathway. SHP2-IN-45 can be used for research on sepsis and acute lung injury.
    SHP2-IN-45
  • HY-N10066
    Anti-inflammatory agent 5
    		Inhibitor
    Anti-inflammatory agent 5 displays potent inhibition of NO generation in lipopolysaccharide-induced BV-2 microglial cells.
    Anti-inflammatory agent 5
  • HY-N0455AR
    L-Arginine hydrochloride (Standard)
    		Activator
    L-Arginine (hydrochloride) (Standard) is the analytical standard of L-Arginine (hydrochloride). This product is intended for research and analytical applications. 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 hydrochloride (Standard)
  • HY-138454
    MEG hemisulfate
    		Inhibitor
    MEG (Mercaptoethylguanidine) hemisulfate is a potent and selective inhibitor of the inducible NO synthase (iNOS), with EC50s of 11.5, 110, and 60 μM for iNOS, ecNOS, and bNOS respectively in tissue homogenates. MEG hemisulfate is also a potent scavenger of peroxynitrite and inhibits peroxynitrite-induced oxidative processes. MEG hemisulfate has a protective effect in many experimental models of inflammation, including ischemia/reperfusion injury, periodontitis, hemorrhagic shock, inflammatory bowel disease, and endotoxic and septic shock.
    MEG hemisulfate
  • HY-14536R
    Methylene Blue (Standard)
    		Inhibitor
    Methylene Blue (Standard) is the analytical standard of Methylene Blue. This product is intended for research and analytical applications. 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 reduces cerebral edema, attenuated microglial activation and reduced neuroinflammation.
    Methylene Blue (Standard)
  • HY-N12478
    Ainsliadimer A
    		Inhibitor
    Ainsliadimer A is a sesquiterpene lactone dimer with an unusual carbon skeleton. Ainsliadimer A can be obtained from from Ainsliaea macrocephala. Ainsliadimer A inhibits the production of nitric oxide in cells stimulated by LPS.
    Ainsliadimer A
  • HY-18252R
    Avanafil (Standard)
    		Inhibitor
    Avanafil (Standard) is the analytical standard of Avanafil. This product is intended for research and analytical applications. Avanafil (TA-1790) is a potent and selective phosphodiesterase-5 (PDE-5) inhibitor with IC50 values of 5.2 nM, 630 nM, 5700 nM, 6200 nM, 12000 nM, 27000 nM, 51000 nM and 53000 nM for PDE-5, PDE-6, PDE-4, PDE-10, PDE-8, PDE-7, PDE-2 and PDE-1, respectively. Avanafil activates NO/cGMP/PKG signaling-pathway to decrease loss in BMD, bone atrophy, and oxidative stress. Avanafil inhibits cyclic guanosine monophosphate (cGMP) hydrolysis and thus increases cGMP levels. Avanafil can be used for the research of erectile dysfunction and osteoporosis.
    Avanafil (Standard)
  • HY-173410
    iNOs-IN-6
    		Inhibitor
    iNOs-IN-6 is an anti-inflammatory agent. iNOs-IN-6 inhibits NF-κB, iNOS, and MAPK expression(IC50: 0.2-0.62 μM). iNOs-IN-6 reduces IL-6, TNF-α, and IL-1β pro-inflammatory mediators levels (IC50: 0.4-0.69 μM).
    iNOs-IN-6
  • HY-147811
    Heterophdoid A
    		Inhibitor
    Heterophdoid A (Compound 1) is an anti-inflammatory agent. Heterophdoid A inhibits NO production with an IC50 of 5.93 μM in BV-2 cells.
    Heterophdoid A
  • HY-161396
    Anti-inflammatory agent 76
    		Inhibitor
    Anti-inflammatory agent 76 (Compd 8b), an anti-inflammatory agent, exhibits good NO, IL-1β and IL-6 inhibitory activities.
    Anti-inflammatory agent 76
  • HY-N15503
    Cycloneroside B
    		Inhibitor
    Cycloneroside B is a novel sesquiterpene aminoglycoside compound that can be isolated from Trichoderma sp. SCSIOW21. Cycloneroside B has the activity of inhibiting the production of NO, and its IC50 value for inhibiting the production of NO is 50.7 µM. Cycloneroside B can be used in the research of the anti-inflammatory field.
    Cycloneroside B
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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