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-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-N7630
    Rehmapicrogenin
    		Inhibitor
    Rehmapicrogenin, isolated from the root of Rehmannia glutinosa, exhibits potent anti-inflammatory effect by inhibiting iNOS, COX-2 and IL-6.
    Rehmapicrogenin
  • 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-P991316
    KD014
    		Activator
    KD014 (DX-2400) is a human monoclonal antibody (mAb) targeting MMP14 (Ki: 0.9 nM). KD014 inhibits TGFβ and SMAD2/3 activity, increases macrophage numbers and iNOS expression, and shifts macrophage phenotype toward anti-tumor M1-like. KD014 has anti-tumor activity in three different tumor models (MDA-MB-231, MDA-MB-435, and PC3). KD014 can be used in breast cancer research.
    KD014
  • 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
  • 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
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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