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-161255
    3,4-DAA
    		Inhibitor
    3,4-DAA is an orally active Anthranilic acid derivative with potent immunosuppressive activities. 3, 4-DAA can alleviate the severity of colitis through inhibiting Th1 cells response, promoting Th2 cytokines expression and inducing CD4+CD25+ T cells expression. 3,4-DAA suppressed expression of inducible nitric oxide synthase (iNOS) and nitric oxide (NO) release from EOC20 cells induced by IFN-γ and Lipopolysaccharide.
    3,4-DAA
  • HY-W746847
    Epibetulinic acid-d3
    Epibetulinic acid-d3 is the deuterium labeled Epibetulinic acid (HY-N0223). Epibetulinic acid exhibits potent inhibitory effects on NO and prostaglandin E2 (PGE2) production in mouse macrophages (RAW 264.7) stimulated with bacterial endotoxin with IC50s of 0.7 and 0.6 μM, respectively. Anti-inflammatory activity.
    Epibetulinic acid-d<sub>3</sub>
  • HY-143456
    Anti-inflammatory agent 18
    		Inhibitor
    Anti-inflammatory agent 18 (compound 3b) shows NO inhibitory activity, with an IC50 of 15.94 μM. Anti-inflammatory agent 18 inhibits HMGB1-induced later inflammation. Anti-inflammatory agent 18 can be used for the research of later inflammation diseases such as coronavirus diseases (COVID-19) and sepsis, etc.
    Anti-inflammatory agent 18
  • HY-P0184
    Camstatin
    		Inhibitor
    Camstatin, a functionally active 25-residue fragment of PEP-19's IQ motif, binds calmodulin and inhibits neuronal nitric oxide (NO) synthase.
    Camstatin
  • HY-12119B
    GW274150 dihydrochloride
    		Inhibitor
    GW274150 (dihydrochloride) is a potent, selective, orally active and NADPH-dependent inhibitor of human inducible nitric oxide synthase (iNOS) (IC50=2.19 μM; Kd=40 nM) and rat iNOS (ED50=1.15 μM). GW274150 (dihydrochloride) displays less potency for both humans or rats endothelial NOS (eNOS) and neuronal NOS (nNOS). GW274150 (dihydrochloride) exerts a protective role in an acute model of lung injury inflammation.
    GW274150 dihydrochloride
  • HY-N8819
    Methyl ganoderate H
    		Inhibitor
    Methyl ganoderate H is a natural product that can be isolated from Ganoderma lucidum. Methyl ganoderate H has moderate inhibitory effect to NO production.
    Methyl ganoderate H
  • HY-N7656
    5,7,8-Trimethoxyflavone
    5,7,8-Trimethoxyflavone (Norwogonin 5,7,8-trimethyl ether), isolated from Andrographis echioides, inhibits NO with an IC50 of 39.1 μM. 5,7,8-Trimethoxyflavone has anti-inflammatory activity.
    5,7,8-Trimethoxyflavone
  • HY-125458
    Iromycin A
    		Inhibitor
    Iromycin A is a potent inhibitor of nitric oxide synthases (NO synthase) that can be isolated from Streptomyces sp..
    Iromycin A
  • HY-145870
    Anti-inflammatory agent 13
    		Inhibitor
    Anti-inflammatory agent 13 (Compound 3) is a pentacyclic triterpene compound. Anti-inflammatory agent 13 exhibits a considerable inhibitory effect on inflammation models. Anti-inflammatory agent 13 has the potential for the research of either DAMPs or PAMPs triggered inflammation.
    Anti-inflammatory agent 13
  • HY-N15501
    Trichaspside F
    		Inhibitor
    Trichaspside F is a sesquiterpene aminoglycoside compound discovered from Trichoderma sp. SCSIOW21. Trichaspside F has the activity of inhibiting the production of NO. In the experiment with macrophage RAW 264.7 cells, its IC50 value for inhibiting the production of NO is 54.8 µM. Trichaspside F can be used in the research of the anti-inflammatory field.
    Trichaspside F
  • HY-N0455AS4
    L-Arginine-13C6,15N4,d7 hydrochloride
    		Activator
    L-Arginine-13C6,15N4,d7 (hydrochloride) is the deuterium, 13C-, and 15-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>13</sup>C<sub>6</sub>,<sup>15</sup>N<sub>4</sub>,d<sub>7</sub> hydrochloride
  • HY-174278
    PPARδ agonist 12
    		Inhibitor
    PPARδ agonist 12 (compound 25) is a PPARδ agonist that inhibits the production of inflammatory factors and nitric oxide. PPARδ agonist 12 can also effectively prevent macrophages from infiltrating inflammatory sites and can be used in inflammation research.
    PPARδ agonist 12
  • HY-18732B
    L-NMMA citrate
    		Antagonist
    L-NMMA citrate competitively antagonizes L-arginine, and thus inhibits production of nitric oxide (NO). L-NMMA is utilized as NO synthase antagonist in experimental settings.
    L-NMMA citrate
  • HY-138050
    Nyasol
    		Inhibitor
    Nyasol ((-)-Nyasol) is an active compound that has antifungal, antibacterial, antileishmanial, hyaluronidase inhibition activities. Nyasol inhibits LTB4 binding to human neutrophils. Nyasol suppresses neuroinflammatory response through the inhibition of I-κB degradation in LPS (HY-D1056)-stimulated BV-2 microglial cells.
    Nyasol
  • HY-B0503S
    2-Thiouracil-13C,15N2
    		Inhibitor
    2-Thiouracil-13C,15N2 is the 13C, 15N labeled 2-Thiouracil. 2-Thiouracil (Thiouracil) is an antithyroid compound. 2-Thiouracil can function as a highly specific melanoma seeker. 2-Thiouracil is a selective inhibitor of neuronal nitric oxide synthase (nNOS) with a Ki of 20 μM.
    2-Thiouracil-<sup>13</sup>C,<sup>15</sup>N<sub>2</sub>
  • HY-125495
    Telmesteine
    		Inhibitor
    Telmesteine is an amucolitic agent. Telmesteine has anti-protease activity. Telmesteine inhibits LPS-induced NO production in RAW264.7 cells. Telmesteine can be used for research of inflammation, such as acute and chronic bronchitis and obstructive airways disease.
    Telmesteine
  • HY-N15527
    Staphylionoside D
    		Inhibitor
    Staphylionoside D is found in Annona squamosa L.. Staphylionoside D can inhibit the NO production and exhibit anti-inflammatory activity.
    Staphylionoside D
  • HY-137957
    Longiferone B
    		Inhibitor
    Longiferone B is a daucane sesquiterpene, that can be isolated from Boesenbergia longiflora rhizomes. Longiferone B shows anti-inflammatory activity against NO release with an IC50 of 21.0 μM. Longiferone B also suppresses the iNOS and COX-2 mRNA expression.
    Longiferone B
  • HY-W753956
    Iminostilbene-d10
    Iminostilbene-d10 is the deuterium labeled Iminostilbene (HY-N7064). Iminostilbene is a chemical precursor of carbamazepine. Additionally, Iminostilbene is an orally active inhibitor of PKM2 (Pyruvate Kinase M2) and COX2 (Cyclooxygenase-2). Iminostilbene exerts its effects by inhibiting PKM2 and its interaction with HIF-1α and STAT3, reducing COX2 and iNOS expression, and decreasing LPS-induced release of IL-1β, IL-6, TNF-α, and MCP-1, thereby suppressing macrophage-mediated inflammatory responses and improving myocardial ischemia/reperfusion (MI/R) injury. Iminostilbene holds promise for research in inflammation regulation, cardiovascular diseases (such as MI/R injury), and macrophage-mediated immune-related diseases.
    Iminostilbene-d<sub>10</sub>
  • HY-N0278
    Anemonin
    		Inhibitor
    Anemonin (Pulsatilla camphor), a selective iNOS inhibitor, is also a PKC-θ inhibitor. Anemonin can significantly inhibit the translation or protein stability of PKC-θ protein. Anemonin also ameliorates dextran sodium sulfate-induced acute ulcerative colitis (UC) in mice. Anemonin can be used in the research of inflammation-related diseases.
    Anemonin
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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