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  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
Art. -Nr. Produktname Wirkung Reinheit Chemical Structure
  • HY-N16774
    Balanophonin B
    		Inhibitor
    Balanophonin B is a selective inhibitor (IC50=1.46 μg/mL) that targets the lipopolysaccharide (LPS)-induced nitric oxide (NO) production pathway and can be isolated from Lithocarpus pachylepis. Balanophonin B inhibits the production of NO in LPS-stimulated RAW264.7 macrophages and exerts anti-inflammatory activity to reduce the inflammatory response. Balanophonin B can be used for anti-inflammatory drug development and biological activity research of natural lignan compounds.
    Balanophonin B
  • 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-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-N16817
    Rabdoternin E
    		Inhibitor
    Rabdoternin E is a potential anti-inflammatory and antitumor agent. 2α-Acetoxy-14,15-cyclopimara-7β,16-diol only inhibits nitric oxide (NO) production in lipopolysaccharide (LPS)-induced RAW264.7 macrophages (IC50=2.3 μM) and exhibits cytotoxicity against human tumor cells such as HL-60 and SW-480 (IC50 values ??of 2.6 μM and 4.1 μM, respectively). Rabdoternin E is an ent-kaurane-type diterpenoid compound that can be naturally extracted from the 70% acetone aqueous extract of the aerial parts of Isodon rosthornii (Diels) Hara (a plant of the Lamiaceae family, Isodon genus).
    Rabdoternin E
  • 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
  • HY-N18031
    Idesin
    Idesin is a compound found in the fruits of Idesia polycarpa. Idesin inhibits LPS (HY-D1056)-induced nitric oxide production with mild cytotoxicity.
    Idesin
  • HY-P1181
    Pam2CSK4
    		Activator
    Pam2CSK4 is a TLR2 agonist. Pam2CSK4 induces the expression of iNOS and NO in macrophage cell lines via TBK1 and MyD88 molecules. Pam2CSK4 activates the NF-κB and Bruton's tyrosine kinase signaling pathways in platelets, and promotes platelet-endothelial cell interactions. TLR2 activation triggered by Pam2CSK4 expands myeloid-derived suppressor cells (MDSCs) and suppresses anti-tumor immune responses in the tumor microenvironment. Pam2CSK4 acts as a Th2-polarizing adjuvant in mouse vaccine models against Leishmania major and Brugia malayi. Pam2CSK4 can be used in the research of various diseases, including thromboinflammatory diseases, sepsis, atherosclerosis, heart failure, influenza, lymphoma, melanoma, cutaneous leishmaniasis and lymphatic filariasis.
    Pam2CSK4
  • HY-N9765
    threo-Guaiacylglycerol β-coniferyl ether
    		Control
    threo-Guaiacylglycerol β-coniferyl ether (compound 9) is a potentially active compound, but its inhibitory activity against NF-κB, nitric oxide production, aromatase, quinone reductase 2, and cyclooxygenase (COX-1/-2) is not significant. threo-Guaiacylglycerol β-coniferyl ether can be naturally extracted from the 95% ethanol extract of the whole plant of Lepisorus contortus (Christ) Ching (a plant of the Polypodiaceae family).
    threo-Guaiacylglycerol β-coniferyl ether
  • HY-W032938
    COX-1-IN-4
    		Inhibitor
    COX-1-IN-4 (Compound P10) is a selective COX-1 inhibitor (IC50s: COX-1 = 0.09 μM; COX-2 = 2.49 μM). COX-1-IN-4 reduces the production of NO as well as the expression of the iNOS protein. COX-1-IN-4 can be used in the research of neuroinflammation.
    COX-1-IN-4
  • 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-N17496
    Cyathisterol
    		Inhibitor
    Cyathisterol is a steroidal compound that inhibits LPS (HY-D1056)-induced nitric oxide production. Cyathisterol can be used for the research of inflammatory diseases.
    Cyathisterol
  • HY-14343
    KLYP961
    		Inhibitor
    KLYP961 is a selective and orally active dual inhibitor of inducible and neuronal NO synthase (IC50 = 50-400 nM). KLYP961 can inhibit endotoxin-evoked plasma nitrates increases and attenuate pain behaviors in a mouse formalin model. KLYP961 can attenuate carrageenin-induced edema and inflammatory hyperalgesia and writhing response elicited by Phenylbenzoquinone (HY-W275039). KLYP961 can be used for the research of neurological disease.
    KLYP961
  • 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-N6908R
    Continentalic acid (Standard)
    		Modulator
    Continentalic acid (Standard) is the analytical standard of Continentalic acid (HY-N6908). This product is intended for research and analytical applications. Continentalic acid is a diterpenoid organic acid. Continentalic acid exhibits multiple activities including anti-inflammatory, antioxidant, neuroprotective, antibacterial and antitumor effects. Continentalic acid alleviates oxidative stress, reduces pro-inflammatory cytokine production, inhibits MAPK phosphorylation and neutrophil infiltration, and induces growth inhibition and apoptosis of cancer cells. Continentalic acid can be used in research related to traumatic brain injury, cancer, inflammation and infections.
    Continentalic acid (Standard)
  • HY-181642
    nNOS-IN-3
    		Inhibitor
    nNOS-IN-3 (compound 4) is an orally active, selective, neuronal nitric oxide synthase (nNOS) inhibitor with a human hnNOS Ki of 25 nM, rat rnNOS Ki of 18 nM, human heNOS Ki of 58140 nM, human hiNOS Ki of 6422 nM. nNOS-IN-3 binds to nNOS active sites via hydrogen bonds with Glu and chalcogen bonds with Met, fails to form chalcogen bonds with heNOS, and undergoes passive transcellular transport with minimal efflux liability. nNOS-IN-3 can be used for the research of neurodegenerative diseases and melanoma.
    nNOS-IN-3
  • HY-114798
    Rabelomycin
    		Inhibitor
    Rabelomycin is an angucycline antibiotic and inducible nitric oxide synthase (iNOS) inhibitor with an IC50 of 63.9 μM. Rabelomycin can be used in research on bacterial infections, Alzheimer's disease, and Huntington's disease.
    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
Art. -Nr. Produktname / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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