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-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
  • HY-173518
    SIN 14
    		Inhibitor
    SIN 14, a derivative of Sinomenine (HY-15122), is an orally active HO-1 activator (KD = 17.2 μM). SIN 14 binds to the catalytic core domain of HO-1 and induces HO-1 activation in catalysis. SIN 14 significantly increases HO-1 stability. SIN 14 has anti-inflammatory effects and inhibits M1 macrophage polarization while promoting M2 polarization in LPS (Lipopolysaccharides)(HY-D1056)-induced RAW264.7 cells. SIN 14 inhibits inflammatory mediator production (eg: NO, IL-6, IL-1β and CCL2, inhibits production of ROS and down-regulates the expression of COX-2 and iNOS. SIN 14 can inhibit RA-related inflammatory edema in collagen-induced arthritis (ClA) mice.
    SIN 14
  • HY-172764
    L-ENIPO hydrochloride
    		Inhibitor
    L-ENIPO (hydrochloride) is an inhibitor of iNOS, nNOS, and eNOS with Ki values of 17, 10.3, and 58.2 μM. L-ENIPO (hydrochloride) exerts reversible tight binding inhibition selective for iNOS with longer incubation time.
    L-ENIPO hydrochloride
  • HY-181155
    Anti-inflammatory agent 111
    		Inhibitor
    Anti-inflammatory agent 111 is a potent anti-inflammatory agent. Anti-inflammatory agent 111 reduces Lipopolysaccharides (LPS) (HY-D1056)-induced i-NOS and COX-2 protein expression, decreases nitric oxide, IL-6, and TNF-α production. Anti-inflammatory agent 111 maintains normal cell viability at bioactive concentrations.Anti-inflammatory agent 111 can be used for the research of inflammation-related disorders.
    Anti-inflammatory agent 111
  • HY-N17888
    Ephemeranthol A
    		Inhibitor
    Ephemeranthol A is a phenanthrene compound with anticancer and anti-inflammatory activities. Ephemeranthol A exerts significant anti-inflammatory effects in macrophages by inhibiting the NF-κB and MAPK signaling pathways. Ephemeranthol A induces apoptosis and inhibits metastasis of lung cancer cells by suppressing the FAK/Akt signaling and EMT processes. Ephemeranthol A can be used for the research of acute and chronic inflammatory diseases and non-small cell lung cancer.
    Ephemeranthol A
  • HY-N13138
    Angulasaponin B
    		Inhibitor
    Angulasaponin B, a natural product, can be obtained from Vigna angularis. Angulasaponin B inhibits nitric oxide production in LPS-activated RAW264.7 macrophages with IC50 values ​​ranging from 13 μM to 24 μM.
    Angulasaponin B
  • HY-N10217
    Paneolilludinic acid
    Paneolilludinic acid is a compound isolated from an endolichenic fungus Cryptomarasmius aucubae. Paneolilludinic acid significantly inhibits nitric oxide (NO) production.
    Paneolilludinic acid
  • HY-B0905S
    Tilmicosin-d3
    		Inhibitor 98.9%
    Tilmicosin-d3 is the deuterium labeled Tilmicosin. Tilmicosin (LY-177370) is an orally active calcium channel antagonist and macrolide antibiotic with antimicrobial activity. Tilmicosin mainly acts on the 50S subunit of bacterial ribosomes, inhibiting protein synthesis. Tilmicosin is effective in the treatment of respiratory diseases in livestock such as cattle, sheep and pigs. In addition, Tilmicosin has immunomodulatory and anti-inflammatory effects.
    Tilmicosin-d<sub>3</sub>
  • HY-N16537
    2-Oxostenine
    		Inhibitor
    2-Oxostenine (Compound 7) is a stenine-type alkaloid found in the roots of Stemona tuberosa Lour. 2-Oxostenine can weakly inhibit Lipopolysaccharide (HY-D1056)-induced NO production. 2-Oxostenine can be used for the research of inflammation.
    2-Oxostenine
  • HY-180828
    iNOs-IN-8
    		Inhibitor
    iNOs-IN-8 (Compound 13h) is an efficient and highly selective inducible nitric oxide synthase (iNOS) inhibitor, with an IC50 of 238 nM. iNOs-IN-8 exhibits significant neuroprotective effects in oxygen-glucose deprivation/reoxygenation (OGD/R) and hydrogen peroxide-induced neuronal and endothelial cell damage. iNOs-IN-8 significantly reduces the volume of cerebral infarction and improves neurological function in rat models. iNOs-IN-8 can be used for the study of ischemic stroke.
    iNOs-IN-8
  • HY-N17736
    Chikusetsusaponin IVa methyl ester
    		Inhibitor
    Chikusetsusaponin IVa methyl ester (CME) is a natural triterpenoid saponin compound. Chikusetsusaponin IVa methyl ester induces G0/G1 cell cycle arrest and apoptosis in colon cancer cells by inhibiting the Wnt/β-catenin signaling pathway. By inhibiting the NF-κB and AP-1 signaling pathways, Chikusetsusaponin IVa methyl ester significantly reduces the production of NO, PGE₂ and pro-inflammatory cytokines (TNF-α, IL-6, IL-1β), and downregulates the levels of iNOS and COX-2. Chikusetsusaponin IVa methyl ester can be used in researches on colorectal cancer and inflammation.
    Chikusetsusaponin IVa methyl ester
  • HY-181081
    CHNQD-03005
    		Inhibitor
    CHNQD-03005 is an orally active anti-inflammatory agent. CHNQD-03005 inhibits the expression of iNOS and COX-2, reduces inflammatory signal transduction, suppresses NO production, and downregulates the pro-inflammatory cytokines TNF-α, IL-6 and IL-1β. CHNQD-03005 can be used in the research of inflammatory diseases such as colitis.
    CHNQD-03005
  • HY-N9891
    12-Dehydrogingerdione
    		Inhibitor
    12-Dehydrogingerdione is an inhibitor of NO Synthase. 12-Dehydrogingerdione signi?cantly inhibits LPS-stimulated production of NO, IL-6 and PGE2 in Raw 264.7 cells.
    12-Dehydrogingerdione
  • HY-D0958R
    Methylene blue hydrate (Standard)
    		Inhibitor
    Methylene blue (hydrate) (Standard) is the analytical standard of Methylene blue (hydrate). This product is intended for research and analytical applications. Methylene blue (Basic Blue 9) hydrate 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 hydrate through the nitric oxide syntase/guanylate cyclase signalling pathway to reduce prepulse inhibition. Methylene blue hydrate is a REDOX cycling compound and able to cross the blood-brain barrier. Methylene blue hydrate is a Tau aggregation inhibitor. Methylene blue hydrate reduces cerebral edema, attenuated microglial activation and reduced neuroinflammation.
    Methylene blue hydrate (Standard)
  • HY-108054A
    Cindunistat ((hydrochloride) maleate)
    		Inhibitor
    Cindunistat hydrochloride maleate is a potent, orally active and selective iNOS inhibitor.
    Cindunistat ((hydrochloride) maleate)
  • HY-W007539R
    2,4-Dihydroxybenzaldehyde (Standard)
    		Inhibitor
    2,4-Dihydroxybenzaldehyde (Standard) is the analytical standard of 2,4-Dihydroxybenzaldehyde. This product is intended for research and analytical applications. 2,4-Dihydroxybenzaldehyde is an endogenous metabolite. 2,4-Dihydroxybenzaldehyde is a pharmaceutical intermediate that can be used to synthesize various Schiff base compounds. 2,4-Dihydroxybenzaldehyde exhibits significant anti angiogenic, anti-inflammatory, and analgesic activities. 2,4-Dihydroxybenzaldehyde reduces the production of NO and ROS by inhibiting the expression of iNOS and COX-2. 2,4-Dihydroxybenzaldehyde is commonly used in the study of inflammatory conditions.
    2,4-Dihydroxybenzaldehyde (Standard)
  • HY-139049
    NXN-188
    		Inhibitor
    NXN-188 is a combined nNOS inhibitor and an agonist of 5HT-1B/1D receptor. NXN-188 can be studied in research on migraine.
    NXN-188
  • HY-N17540
    8-Epiasterolide
    8-Epiasterolide is a sesquiterpenoid compound isolated from the rhizomes of Atractylodes japonica Koidzumi. 8-Epiasterolide inhibits NO production in LPS (HY-D1056)-treated RAW 264.7 cells. 8-Epiasterolide can be used in the study of inflammatory diseases.
    8-Epiasterolide
  • HY-159564
    iNOS/COX-2-IN-3
    		Inhibitor
    iNOS/COX-2-IN-3 (compound 7d) is a dual inhibitor of iNOS and COX-2, with potential anti-inflammatory activity against LPS (HY-D1056)-induced RAW 264.7 cells (IC50=3.48 μM). iNOS/COX-2-IN-3 has good plasma stability, oral activity and gastric safety, and its inhibitory activity on iNOS and COX-2 expression is 5.43-fold and 2.37-fold that of Indomethacin (HY-14397), respectively.
    iNOS/COX-2-IN-3
  • HY-N15506
    Cycloneroside E
    		Inhibitor
    Cycloneroside E is a sesquiterpene aminoglycoside compound discovered from Trichoderma sp. SCSIOW21. Cycloneroside E has the activity of inhibiting the production of NO. In macrophage RAW 264.7 cells, its IC50 value for inhibiting the production of NO is 48.0 µM. Cycloneroside E can be used in the research of the anti-inflammatory field.
    Cycloneroside E
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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