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-N9086A
    (rac)-Poriol
    		Ligand
    (rac)-Poriol (5,7,4'-Trihydroxy-6-methylflavanone) exhibits antioxidant activity, and scavenges free radical DPPH with an IC50 of 0.18 µg/mL. (rac)-Poriol inhibits the LPS (HY-D1056)-induced NO generation in RAW264.7 (98.35% inhibition rate at 10 μM), and exhibits anti-inflammatory activity. (rac)-Poriol exhibits good binding affinity with iNOS, COX-1, COX-2, TNF-α, and IL-1β.
    (rac)-Poriol
  • HY-N0761AR
    trans-Isoferulic acid (Standard)
    		Inhibitor
    trans-Isoferulic acid (Standard) is the analytical standard of trans-Isoferulic acid. This product is intended for research and analytical applications. trans-Isoferulic acid (trans-3-Hydroxy-4-methoxycinnamic acid) is an aromatic acid isolated from the roots of Clematis florida var. plena. trans-Isoferulic acid exhibits anti-inflammatory activity.trans-isoferulic acid suppresses NO and PGE2 production through the induction of Nrf2-dependent heme oxygenase-1 (HO-1).
    trans-Isoferulic acid (Standard)
  • HY-N6968R
    α-Humulene (Standard)
    		Inhibitor
    α-Humulene (Standard) is the analytical standard of α-Humulene. This product is intended for research and analytical applications. α-Humulene is a main constituent of Tanacetum vulgare L. (Asteraceae) essential oil with anti-inflammation (IC50=15±2 μg/mL). α-Humulene inhibits COX-2 and iNOS expression.
    α-Humulene (Standard)
  • HY-123581R
    Quinocetone (Standard)
    		Activator
    Quinocetone (Standard) is the analytical standard of Quinocetone (HY-123581). This product is used for research and analytical purposes. Quinocetone is an orally active animal feed additive used to increase the meat production of livestock and poultry. Quinocetone exhibits antibacterial activity against a variety of pathogenic microorganisms. Quinocetone exhibits tissue-specific (liver, lymphocyte) toxicity. Quinocetone induces autophagy in cells through the ATF6/DAPK1 pathway. Quinocetone activates the NF-κB and iNOS pathways, leading to cell apoptosis, hepatocyte vacuolar degeneration and fibrosis. Quinocetone can inhibit Nrf2/HO-1 and induce the generation of reactive oxygen species (ROS), leading to oxidative stress and DNA damage.
    Quinocetone (Standard)
  • HY-N13706
    3β,15α-Dihydroxy-7,11,23-trioxo-lanost-8-dien-26-oic acid
    		Inhibitor
    3β,15α-Dihydroxy-7,11,23-trioxo-lanost-8-dien-26-oic acid is a triterpene compound that can be found in Ganoderma lucidum, and it inhibits nitric oxide (NO) production in BV-2 microglial cells induced by lipopolysaccharide (LPS, HY-D1056), with an IC50 of 6.50 μM, making it a potential candidate for anti-inflammatory research.
    3β,15α-Dihydroxy-7,11,23-trioxo-lanost-8-dien-26-oic acid
  • HY-N15272
    Artocarpesin
    		Inhibitor
    Artocarpesin is a flavonoid compound. Artocarpesin has inhibitory effects on methicillin-resistant Staphylococcus aureus (MRSA). Artocarpesin inhibits the production of NO, PGE2 and ROS by inhibiting COX-2 and iNOS expression, and plays an anti-inflammatory role. In addition, Artocarpesin inhibits platelet aggregation by inhibiting cyclic nucleotides and MAPKs, which can be used in the study of cardiovascular diseases.
    Artocarpesin
  • HY-N16632
    1-O-Caffeoylglycerol
    		Inhibitor
    1-O-Caffeoylglycerol is a compound with anti-inflammatory activity found in Sorghum bicolor. 1-O-Caffeoylglycerol significantly inhibits LPS (HY-D1056) induced NO production (IC50 = 18.5 μM) and dose dependently inhibits iNOS protein expression. 1-O-Caffeoylglycerol can be used for research on inflammatory conditions.
    1-O-Caffeoylglycerol
  • HY-107632R
    GYY4137 (Standard)
    		Inhibitor
    GYY4137 (Standard) is the analytical standard of GYY4137 (HY-107632). This product is intended for research and analytical applications. GY4137 is a sustained-release H2S donor possessing vasodilatory, antihypertensive, and anti-inflammatory activities. GY4137 can inhibit cell growth, induce apoptosis, and cause cell cycle arrest by blocKing the STAT3 pathway, demonstrating potent anticancer activity.
    GYY4137 (Standard)
  • HY-Y0078S1
    Cinnamyl Alcohol-d9
    		Inhibitor
    Cinnamyl Alcohol-d9 is deuterated labeled Cinnamyl Alcohole (HY-Y0045). Cinnamyl Alcohol is an active component from chestnut flower, inhibits increased PPARγ expression, exhibits anti-obesity, antioxidant and anti-inflammatory activities.
    Cinnamyl Alcohol-d<sub>9</sub>
  • HY-133198
    Valeriandoid B
    		Inhibitor
    Valeriandoid B is a Iridoids product that can be isolated from the herbs of Valeriana jatamansi.
    Valeriandoid B
  • HY-W269285
    H-D-Tpi-OH
    		Inhibitor
    H-D-Tpi-OH (D-1,2,3,4-Tetrahydronorharman-3-carboxylic acid) is a tetrahydro-β-carboline derivative. H-D-Tpi-OH only slightly upregulates QR1, mildly inhibits the aromatase and NO synthesis pathways, and shows no significant in vitro anti-breast tumor proliferation activity. H-D-Tpi-OH can be used in cancer-related research.
    H-D-Tpi-OH
  • HY-N0577R
    Apiin (Standard)
    		Inhibitor
    Apiin (Standard) is the analytical standard of Apiin. This product is intended for research and analytical applications. Apiin, a major constituent of Apium graveolens leaves with anti-inflammatory properties. Apiin shows significant inhibitory activity on nitrite (NO) production (IC50 = 0.08 mg/mL) in-vitro and iNOS expression (IC50 = 0.049 mg/ mL) in LPS-activated J774.A1 cells.
    Apiin (Standard)
  • HY-155224
    Sulpho NONOate
    		Control
    Sulpho NONOate (Sulfi/NO) does not produce NO at physiological pH. Sulpho NONOate can be used in the experiments about other NO-donor regents as a negative control.
    Sulpho NONOate
  • HY-N0455AS9
    L-Arginine-15N4,d7 hydrochloride
    		Activator
    L-Arginine-15N4,d7 (hydrochloride) is the deuterium and 15N-labeled L-Arginine hydrochloride. L-Arginine hydrochloride ((S)-(+)-Arginine hydrochloride) is the nitrogen donor for synthesis of nitric oxide, a potent vasodilator that is deficient during times of sickle cell crisis.
    L-Arginine-<sup>15</sup>N<sub>4</sub>,d<sub>7</sub> hydrochloride
  • HY-W003969R
    Aminopicoline (Standard)
    		Inhibitor
    Aminopicoline (Standard) is the analytical standard of Aminopicoline. Aminopicoline (Ascensil) is a potent and non-selective inhibitor of nitric oxide synthase (NOS) isoenzymes (iNOS, nNOS, eNOS). Aminopicoline competes with arginine at the substrate-binding site of nitric oxide synthase, reduces cellular nitric oxide production, inhibits the elevation of plasma nitrate, increases mean arterial pressure at high doses, and also serves as a basis for radiolabeled ligands to localize nitric oxide synthase binding sites. Aminopicoline can be used in the research of diseases associated with septic shock, joint inflammation, intestinal inflammation, and CNS inflammation。
    Aminopicoline (Standard)
  • HY-N0481R
    Roburic acid (Standard)
    		Inhibitor
    Roburic acid (Standard) is the analytical standard of Roburic acid. This product is intended for research and analytical applications. Roburic acid acts as an anti-inflammatory, anti-tumor and osteoclastogenesis inhibitor, with a Ki of 7.066 μM against human TNF, an IC50 of 9 μM against human COX-2, and an IC50 of 5 μM against ovine COX-1. Roburic acid reduces the production of inflammatory mediators such as NO and IL-6 in macrophages by inhibiting the NF-κB and MAPK (p38/JNK) pathways. By competitively inhibiting the TNF-TNF-R1 interaction, Roburic acid blocks the downstream NF-κB signaling pathway, thereby inducing cell cycle arrest and apoptosis in cancer cells. Roburic acid specifically inhibits osteoclastogenesis and bone resorption by suppressing the RANKL/TRAF6/NF-κB/NFATc1 axis. Roburic acid can be used in research related to osteolytic diseases such as osteoporosis, colorectal cancer and inflammatory diseases.
    Roburic acid (Standard)
  • HY-107969R
    Haloperidol decanoate (Standard)
    Haloperidol decanoate (Standard) is the analytical standard of Haloperidol decanoate. This product is intended for research and analytical applications. Haloperidol decanoate is a depot preparation of haloperidol, a commonly used butyrophenone derivative with antipsychotic activity. Haloperidol decanoate can increase the striatal D2 receptor in rat. Haloperidol decanoate can improve conditions of psychoses (mainly schizophrenia). Haloperidol decanoate can lead to increased accumulation of the dopamine metabolites homo-vanillic acid. Haloperidol decanoate can reduce intestinal transport, increase gastric emptying and reduce acid output in rat model.
    Haloperidol decanoate (Standard)
  • HY-B1092R
    Gluconate Calcium (Standard)
    		Inhibitor
    Gluconate Calcium (Standard) (Calcium D-gluconate (Standard)) is the analytical standard of Gluconate Calcium (HY-B1092). This product is intended for research and analytical applications. Gluconate (D-Gluconic acid) Calcium is an orally active glucose derivative. Gluconate Calcium reduces nitric oxide and inflammatory cytokines (IL-1β and IL-6). Gluconate Calcium inhibits ERK phosphorylation. Gluconate Calcium has antioxidant and antiplatelet activation activities. Gluconate Calcium has antitumor activity against colorectal cancer. Gluconate Calcium improves osteoarthritis, intestinal damage and acute lung injury.
    Gluconate Calcium (Standard)
  • HY-N0268R
    Irisflorentin (Standard)
    		Inhibitor
    Irisflorentin (Standard) is the analytical standard of Irisflorentin. This product is intended for research and analytical applications. Irisflorentin, a naturally occurring isoflavone, is an abundant active constituent in Belamcanda chinensis. Irisflorentin markedly reduces the transcriptional and translational levels of inducible nitric oxide synthase (iNOS) as well as the production of NO. Anti-inflammatory activity.
    Irisflorentin (Standard)
  • HY-N7423A
    (E)-Methyl isoferulate
    		Inhibitor
    (E)-Methyl isoferulate ((E)-Isoferulic acid methyl ester) is a derivative of Cinnamic acid (HY-N0610A) and NO inhibitor, with an IC50 > 100 μM against nitric oxide production. (E)-Methyl isoferulate is isolable from the solid cultures of the edible mushroom Neolentinus lepideus. (E)-Methyl isoferulate exerts mild anticancer effects against liver cancer and leukemia.
    (E)-Methyl isoferulate
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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