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-175824
    PSD-95/nNOS PPI-IN-1
    		Inhibitor
    PSD-95/nNOS PPI-IN-1 is a inhibitor targeting the PSD-95/nNOS interaction with potential blood-brain barrier penetration. PSD-95/nNOS PPI-IN-1 binds to the PSD-95 PDZ2 domain with high affinity (Ki = 19.45 μM). PSD-95/nNOS PPI-IN-1 inhibits glutamate-induced excitotoxicity by reducing intracellular ROS levels and inhibiting apoptosis. PSD-95/nNOS PPI-IN-1 significantly reduces cerebral infarct volume in rat tMCAO models. PSD-95/nNOS PPI-IN-1 can be used for the study of acute ischemic stroke.
    PSD-95/nNOS PPI-IN-1
  • HY-18729
    L-NAME
    		Inhibitor
    L-NAME inhibits NOS with an IC50 of 70 μM. L-NAME is a precursor to NOS inhibitor L-NOARG which has an IC50 value of 1.4 μM. L-NAME requires hydrolysis of the methyl ester by cellular esterases to become a fully functional inhibitor. L-NAME can be used to induce hypertension and preeclampsia models.
    L-NAME
  • HY-N13729
    Stephalonine P
    		Inhibitor
    Stephalonine P is a hasubanan-type alkaloid anti-inflammatory agent with neuroprotective effects against neuroinflammation. Stephalonine P regulates post-ischemic inflammatory responses by inhibiting NO production in LPS-activated BV2 microglia (IC50=34.01 μM), thereby reducing microglial activation and neuronal damage. Stephalonine P can be isolated from the whole plant of Stephania japonica. Stephalonine P can be used in research on stroke and other neuroinflammation-related diseases.
    Stephalonine P
  • HY-N17353
    Vitedoamine A
    		Inhibitor
    Vitedoamine A is a Phenylnaphthalene-type lignan alkaloid. Vitedoamine A can be isolated from Vitex negundo. Vitedoamine A inhibits the activity of IKKβ with an IC50 value of 39 μM. Vitedoamine A could inhibit the transcriptional activity of NF-κB, and suppress the production of NO and reduce the expressions of inflammatory cytokines (IL-1β, IL-6, and TNF-α). Vitedoamine A inhibits the phosphorylation of IKKα/β and p65, and prevents the degradation of IκBα. Vitedoamine A possesses anti-rheumatoid arthritis capacity.
    Vitedoamine A
  • HY-17003R
    Saquinavir mesylate (Standard)
    		Inhibitor
    Saquinavir mesylate (Standard) (Ro 31-8959/003 (Standard)) is the analytical standard of Saquinavir mesylate (HY-17003). This product is intended for research and analytical applications. Saquinavir (Ro 31-8959) mesylate is an orally active HIV protease inhibitor that can be used in the research of AIDS. Saquinavir mesylate also has anti-inflammatory activity and can induce apoptosis of human red blood cells.
    Saquinavir mesylate (Standard)
  • HY-N15219
    6-Hydroxygenistein-7-O-β-D-glucopyranoside
    		Inhibitor
    6-Hydroxygenistein-7-O-β-D-glucopyranoside (compound 2) is a glucopyranoside that can be isolated from Pueraria lobata flower. The isoflavones in Pueraria lobata flower are potential anti-inflammatory agents for microglia and can inhibit the production of NO.
    6-Hydroxygenistein-7-O-β-D-glucopyranoside
  • HY-125131
    Buddlejasaponin IV
    		Inhibitor
    Buddlejasaponin IV (BS‐IV) exerts anti-inflammatory and cytotoxic effects against cancer cells.
    Buddlejasaponin IV
  • HY-182060
    PDE4B/D-IN-5
    		Inhibitor
    PDE4B/D-IN-5 (Compound P32) is a peripherally restricted, oral active inhibitor of PDE4B and PDE4D with extremely low blood-brain barrier penetration, with IC50 values of 3.4 nM and 2.2 nM, respectively. PDE4B-IN-8 inhibits the production of TNF-α. PDE4B/D-IN-5 significantly reduces the Bax/Bcl2 ratio, and alleviates oxidative stress by decreasing MPO activity and NO levels. PDE4B/D-IN-5 exhibits anti-inflammatory, antioxidant, and anti-apoptotic activities. PDE4B/D-IN-5 can be used for the research of acute lung injury.
    PDE4B/D-IN-5
  • HY-N11943
    Kadsulignan H
    		Inhibitor
    Kadsulignan H (compound 13) is a lignan with inhibitory activity on NO production. Kadsulignan H inhibits NO production in BV-2 cells with an IC50 of 14.1 μM.
    Kadsulignan H
  • HY-181464
    CAY10565
    		Activator
    CAY10565 (Compound 3d) is a nitric oxide (NO) donor. CAY10565 releases nitric acid via an acid-catalyzed ring-opening mechanism under acidic conditions. CAY10565 induces vasodilation.
    CAY10565
  • HY-N3007R
    Naringenin chalcone (Standard)
    		Inhibitor
    Naringenin chalcone (Standard) is an analytical standard of Naringenin chalcone. This product is intended for research and analytical applications. Naringenin chalcone is an orally active intermediate in the biosynthesis of flavonols. Naringenin chalcone induces apoptosis. Naringenin chalcone inhibits the production of MCP-1 and NO. Naringenin chalcone exhibits anticancer activity against glioblastoma. Naringenin chalcone has anti-inflammatory and anti-allergic properties.
    Naringenin chalcone (Standard)
  • HY-N15511
    Harzianol A
    		Inhibitor
    Harzianol A is found in Trichoderma sp. SCSIOW21. Harzianol A can inhibit the production of NO and exhibit anti-inflammatory activity.
    Harzianol A
  • HY-B1264R
    Celiprolol hydrochloride (Standard)
    		Activator
    Celiprolol (hydrochloride) (Standard) is the analytical standard of Celiprolol (hydrochloride). This product is intended for research and analytical applications. Celiprolol (REV 5320) is a potent, cardioselective and orally active β1-andrenoceptor r antagonist with partial β2 agonist activity, with Ki values of 0.14-8.3 μM. Celiprolol has antihypertensive and antianginal activity, and can be used for the research of cardiovascular disease such as high blood pressure.
    Celiprolol hydrochloride (Standard)
  • HY-N19854
    Mariaterpenoside A
    		Inhibitor
    Mariaterpenoside A is an inducible nitric oxide synthase (iNOS) inhibitor. Mariaterpenoside A interacts with the active cavity of iNOS protein via hydrogen bonds with specific residues of the binding site. Mariaterpenoside A suppresses NO release in LPS (HY-D1056)-induced murine microglial BV-2 cells. Mariaterpenoside A can be used for the research of neurodegenerative disease.
    Mariaterpenoside A
  • HY-P10383A
    SPSB2-iNOS inhibitory cyclic peptide-1 TFA
    SPSB2-iNOS inhibitory cyclic peptide-1 TFA is the TFA salt form of SPSB2-iNOS inhibitory cyclic peptide-1(HY-P10383). SPSB2-iNOS inhibitory cyclic peptide-1 is an inhibitor for the interaction of SPRY domain and SOCS-box protein 2 (SPSB2) and iNOS, through binding SPSB2 on iNOS site with KD of 4.4 nM. SPSB2-iNOS inhibitory cyclic peptide-1 is resistant to the proteases pepsin, trypsin and α-chymotrypsin. SPSB2-iNOS inhibitory cyclic peptide-1 is stable in human plasma and in oxidative environment.
    SPSB2-iNOS inhibitory cyclic peptide-1 TFA
  • HY-168092
    VS-15
    		Inhibitor
    VS-15, a IDO1 inhibitor, selectively binds the heme-free form of IDO1. VS-15 is described as an iNOS inhibitor based on the reduction of NO production.
    VS-15
  • HY-149087
    MR2938
    		Inhibitor
    MR2938 is a potent AChE inhibitor, with an IC50 of 5.04 μM. MR2938 also suppresses NO production obviously (IC50 = 3.29 μM). MR2938 suppresses the neuroinflammation through blocking MAPK/JNK and NF-κB signaling pathways. MR2938 can be used for Alzheimer’s disease (AD) research.
    MR2938
  • HY-B1773AR
    Sodium propionate (Standard)
    		Inhibitor
    Sodium propionate (Standard) is the analytical standard of Sodium propionate. This product is intended for research and analytical applications. Sodium propionate is an orally active short-chain fatty acid. Sodium propionate can be produced by intestinal bacteria from the metabolism of dietary fiber. Sodium propionate increases PPAR-γ, inhibits NF-κB activation, and reduces COX-2 expression and NO production. Sodium propionate also induces Apoptosis and Autophagy. Sodium propionate reduces HSV-1-induced keratitis. Sodium propionate has anticancer effects against glioblastoma. Sodium propionate exhibits neuroprotective, antioxidant, and anti-inflammatory activities. Sodium propionate can be used in the research of spinal cord injury and Alzheimer's disease.
    Sodium propionate (Standard)
  • HY-168096
    iNOs-IN-5
    		Inhibitor
    iNOs-IN-5 (Compound BN-4) is an inhibitor for iNOS with an IC50 of 0.1707 μM, and reduces NO levels in LPS (HT-D1056)-induced RAW264.7 cells. iNOs-IN-5 reduces the hypoxic injury stimulated ROS and lactate dehydrogenase expression, and exhibits anti-necrosis and anti-apoptosis efficacy. iNOs-IN-5 exhibits anti-cerebral ischemia and neuroprotective activities in SD rat models. iNOs-IN-5 is blood-brain barrier penetrable.
    iNOs-IN-5
  • HY-130673
    L-NABE
    		Inhibitor
    L-NABE is a nitric oxide (NO) synthase inhibitor. L-NABE is also a potent endothelium dependent vasoconstrictor and inhibitor of relaxation.
    L-NABE
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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