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-N2237
    Piceatannol 3'-O-glucoside
    		Activator 99.87%
    Piceatannol 3'-O-glucoside, an active component of Rhubarb, activates endothelial nitric oxide (NO) synthase through inhibition of arginase activity with IC50s of 11.22 μM and 11.06 μM against arginase I and arginase II, respectively.
    Piceatannol 3'-O-glucoside
  • HY-W010066
    3,4-Dihydroxyphenylglycol
    		Inhibitor 98.07%
    3,4-Dihydroxyphenylglycol is a phenolic compound and antioxidant. 3,4-Dihydroxyphenylglycol can be extracted from olive oil. 3,4-Dihydroxyphenylglycol downregulates the expression of proinflammatory enzymes (iNOS, COX-2) and prevents the degradation of IκBα. 3,4-Dihydroxyphenylglycol has antioxidant properties. 3,4-Dihydroxyphenylglycol has shown positive effects on frozen-thawed ram sperm. 3,4-Dihydroxyphenylglycol can be used in the study of inflammatory-related diseases (such as ulcerative colitis) and reproductive health (sperm cryopreservation).
    3,4-Dihydroxyphenylglycol
  • HY-N0577
    Apiin
    		Inhibitor 99.94%
    Apiin is a flavonoid glycoside-based iNOS inhibitor. Apiin inhibits the expression of inducible nitric oxide synthase in activated macrophages. Apiin exhibits anti-inflammatory activity.
    Apiin
  • HY-167832
    PT109
    		Inhibitor 99.20%
    PT109 is an orally active, blood-brain barrier permeable multi-kinase inhibitor. By inhibiting PTBP1, PT109 promotes the switch of pyruvate kinase isoform from PKM2 to PKM1, thereby effectively inhibiting the proliferation and migration of glioblastoma multiforme and inducing its reprogramming into oligodendrocytes. PT109 also targets and regulates key signaling molecules such as JNK, SGK1, GSK3β to exert neuroprotective effects including promoting neurogenesis, inducing synapse formation and alleviating neuroinflammation. In Alzheimer's disease models, PT109 exhibits significant efficacy in improving spatial learning ability, along with excellent in vivo pharmacokinetic properties. PT109 can be used to investigate metabolic reprogramming of glioblastoma multiforme and neuroprotective mechanisms of Alzheimer's disease.
    PT109
  • HY-N0911
    Rehmannioside A
    		Inhibitor 99.96%
    Rehmannioside A is a compound that can be isolated from Rehmanniae radix. Rehmannioside A is an inhibitor of CYP3A4, 2C9 and 2D6, with IC50 values of 10.08, 12.62 and 16.43 μM, respectively. Rehmannioside A has anti-inflammatory, antioxidant, anti-apoptosis, anti-ferroptosis, cognitive improvement and neuroprotective activities. Rehmannioside A can be used for the research of nervous system and inflammation-related diseases.
    Rehmannioside A
  • HY-B1264
    Celiprolol hydrochloride
    		Activator 99.98%
    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
  • HY-N4124
    Poricoic acid B
    		Inhibitor 98.60%
    Poricoic acid B is a triterpenoid compound that can be isolated from Poria cocos. Poricoic acid B inhibits intracellular lipid accumulation and reduces the levels of hepatocyte injury markers. Poricoic acid B inhibits the production of NO, TNF-α, IL-1β and IL-6, thereby exerting anti-inflammatory activity. Poricoic acid B can be used in the research of metabolic dysfunction-associated fatty liver disease and inflammatory diseases[3].
    Poricoic acid B
  • HY-171705
    KMS99220
    		Inhibitor 99.48%
    KMS99220 is an orally active, blood-brain barrier-permeable activator of the Nrf2 inhibitory protein Keap-1. KMS99220 enhances the activity of AMPK, activates the Nrf2 signaling pathway, and reduces the phosphorylation of IκB, nuclear translocation of NFκB, as well as the phosphorylation levels of JNK, IKK and p38 MAPK via HO-1. KMS99220 binds to Keap1 to trigger the nuclear translocation of Nrf2, induces the expression of HO-1, NQO1, GCLC, GCLM and proteasome subunits; enhances proteasomal enzymatic activity; inhibits iNOS expression, nitric oxide production and IL-1β generation; attenuates microglial activation; reduces α-synuclein aggregation; and prevents dopaminergic neuron degeneration and motor dysfunction. KMS99220 prevents the degeneration of dopaminergic neurons in the substantia nigra, induces the expression of Nrf2 downstream target genes, and effectively ameliorates associated motor dysfunction in a mouse model of Parkinson's disease. KMS99220 is applicable to research related to Parkinson's disease.
    KMS99220
  • HY-B1478
    Dimaprit dihydrochloride
    		Inhibitor 99.14%
    Dimaprit dihydrochloride is a selective histamine H2 receptor agonist, it also inhibits nNOS with an IC50 of 49 μM. Dimaprit dihydrochloride can stimulate gastric acid secretion.
    Dimaprit dihydrochloride
  • HY-126066
    (-)-Syringaresinol
    		Activator 99.93%
    (-)-Syringaresinol is an orally active isomer of syringaresinol (HY-N8307) found in Annona Montana. (-)-Syringaresinol exhibits antioxidant, anti-inflammatory, and anticancer activities. (-)-Syringaresinol can alleviate ulcerative colitis via the PI3K-Akt/MAPK/Wnt signaling pathway. (-)-Syringaresinol inhibits HL-60 cell proliferation by arresting the G1 phase and inducing apoptosis. (-)-Syringaresinol inhibits LPS (HY-D1056)-induced microglial activation by downregulating the NF-κB p65 signaling pathway and its interaction with ERβ, exerting anti-neuroinflammatory effects.
    (-)-Syringaresinol
  • HY-102062
    Nω-Propyl-L-arginine
    		Inhibitor 98.31%
    Nω-Propyl-L-arginine (N-omega-Propyl-L-arginine) is a potent, competitive, and highly selective inhibitor of neuronal nitric oxide synthase (nNOS), with a Ki of 57 nM. Nω-Propyl-L-arginine displays a 149-fold selectivity for nNOS over endothelial NOS (eNOS).
    Nω-Propyl-L-arginine
  • HY-N0268
    Irisflorentin
    		Inhibitor 99.76%
    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
  • HY-P10710A
    BMP-4 (15-24) acetate
    		Inhibitor 99.30%
    BMP-4 (15-24) acetate is a cell-penetrating heparin-binding peptide with the sequence RKKNPNCRRH. BMP-4 (15-24) acetate exhibits anti-inflammatory and anti-chondrogenic activities. BMP-4 (15-24) acetate can be used in the research of arthritis.
    BMP-4 (15-24) acetate
  • HY-N0918
    Desmethoxyyangonin
    		Inhibitor 99.00%
    Desmethoxyyangonin is one of the six major kavalactones found in the Piper methysticum (kava) plant. Desmethoxyyangonin is a selective inhibitor of monoamine oxidase-B (MAO-B) (IC50: 0.123  µM). Desmethoxyyangonin exerts anti-inflammatory effects by inhibiting Jak2/STAT3 and IKK signaling pathways. Desmethoxyyangonin induces CYP3A23 expression and leads to skeletal muscle relaxation.
    Desmethoxyyangonin
  • HY-N4134
    Ciwujianoside C3
    		Inhibitor 99.65%
    Ciwujianoside C3, an orally active and brain penetrated compound, is isolated the leaves of Acanthopanax henryi Harms. Ciwujianoside C3 has anti-inflammatory effect and can reinforces object recognition memory.
    Ciwujianoside C3
  • HY-P991316
    KD014
    		Activator
    KD014 (DX-2400) is a human monoclonal antibody that selectively targets MMP‑14. KD014 inhibits collagen degradation and regulates the polarization of macrophages toward an anti-inflammatory/anti-tumor phenotype. KD014 alleviates joint damage in rheumatoid arthritis and suppresses tumor growth and invasion. KD014 can be used in studies related to breast cancer and rheumatoid arthritis.
    KD014
  • HY-B0905A
    Tilmicosin phosphate
    		Inhibitor 98.0%
    Tilmicosin (LY-177370) phosphate is an orally active calcium channel antagonist and macrolide antibiotic with antimicrobial activity. Tilmicosin phosphate mainly acts on the 50S subunit of bacterial ribosomes, inhibiting protein synthesis. Tilmicosin phosphate is effective in the treatment of respiratory diseases in livestock such as cattle, sheep and pigs. In addition, Tilmicosin phosphate has immunomodulatory and anti-inflammatory effects.
    Tilmicosin phosphate
  • HY-W251598S
    Bicarbonate-13C sodium
    		99%
    Bicarbonate-13C sodium is the 13C-labeled Sodium bicarbonate (HY-Y0756). Sodium bicarbonate is an inorganic salt that is neutral to slightly alkaline and easily decomposes when exposed to moisture in the air. Sodium bicarbonate can maintain the pH of the culture medium, thereby affecting the expression of inducible nitric oxide synthase (iNOS) and nitric oxide (NO) production in macrophages and reversing the acidosis of the tumor microenvironment. Sodium bicarbonate is widely used in the fields of food, medicine, cosmetics, etc. Its main uses include buffers, flavoring agents, disinfectants, pharmaceuticals, and proton gradient regulators. Sodium bicarbonate is also commonly used as an antacid to inhibit gastrointestinal diseases, neutralize gastric acid, and reduce gastric discomfort.
    Bicarbonate-<sup>13</sup>C sodium
  • HY-129138
    Cyanidin 3,5-diglucoside chloride
    		Inhibitor 99.44%
    Cyanidin 3,5-diglucoside chloride is an anthocyanin. Cyanidin 3,5-diglucoside chloride inhibits inflammatory cytokines (IL-1α, IL-1β, and IL-6) expression and NO production. Cyanidin 3,5-diglucoside chloride inhibits the phosphorylation of STAT3, IκB, ERK, p38, and AKT. Cyanidin 3,5-diglucoside chloride inhibits high pressure-induced decrease in GLAST. Cyanidin 3,5-diglucoside chloride exerts anti-inflammatory and skin barrier modulating effects. Cyanidin 3,5-diglucoside chloride can be used in retinal research.
    Cyanidin 3,5-diglucoside chloride
  • HY-113216BS
    Asymmetric-dimethylarginine-d6 dihydrochloride
    		99.5%
    Asymmetric-dimethylarginine-d6 (dihydrochloride) is the deuterium labeled Asymmetric-dimethylarginine dihydrochloride.
    Asymmetric-dimethylarginine-d<sub>6</sub> dihydrochloride
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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