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-122584
    iNOs-IN-7
    		Inhibitor
    iNOs-IN-7 (example 4) is an inducible nitric oxide synthase (NOS) inhibitor. iNOs-IN-7 can be used for the study of inflammatory disease and pain.
    iNOs-IN-7
  • HY-W010270A
    Aurothiomalate disodium
    		Inhibitor
    Aurothiomalate (disodium) is a TRPA1 inhibitor. Aurothiomalate (disodium) inhibits NF-κB activation and iNOS expression. Aurothiomalate (disodium) promotes M2 transformation of macrophages and increases the expression of TREM-2 and arginase-1. Aurothiomalate (disodium) can be used in the study of liver fibrosis/cirrhosis and arthritis.
    Aurothiomalate disodium
  • HY-168935
    Anti-inflammatory agent 95
    		Inhibitor
    Anti-inflammatory agent 95 (Compound 2e) is an anti-inflammatory agent that exhibits the most potent anti-inflammatory activity in LPS (HY-D1056)-induced RAW 264.7 mouse macrophages. It significantly inhibits the production of NO, with an IC50 of 8.8 μM, and reduces the secretion of TNF-α and IL-1β, with inhibition rates reaching 60% and over 90%, respectively, at a concentration of 100 μM. Anti-inflammatory agent 95 holds promise for research in the field of inflammatory diseases.
    Anti-inflammatory agent 95
  • HY-N16527
    7-O-Galloyl-D-sedoheptulose
    		Inhibitor
    7-O-Galloyl-D-sedoheptulose is an orally effective polyphenolic compound. 7-O-Galloyl-D-sedoheptulose lowers the serum levels of glucose, leptin, insulin, C-peptide, resistin, TNF-α, IL-6, and increases the serum level of adiponectin. 7-O-Galloyl-D-sedoheptulose significantly reduces the levels of ROS and lipid peroxidation products (TBARS) by down-regulating the protein expression of NADPH oxidase subunit Nox-4 and p22phox. 7-O-Galloyl-D-sedoheptulose down-regulates NF-κB and related pro-inflammatory factors (COX-2, iNOS), inhibits the phosphorylation of JNK and the activity of its downstream AP-1. 7-O-Galloyl-D-sedoheptulose reduces the expression of TGF-β1 and fibronectin, indicating its potential in anti-tissue fibrosis. 7-O-Galloyl-D-sedoheptulose can be used for the study of type 2 diabetes and its hepatic and pancreatic complications.
    7-O-Galloyl-D-sedoheptulose
  • HY-N10156
    1,3,5-Trihydroxy-4-prenylxanthone
    		Inhibitor
    1,3,5-Trihydroxy-4-prenylxanthone is a Na+/H+ exchange system inhibitor with a minimum inhibitory concentration of 10 μg/mL. 1,3,5-Trihydroxy-4-prenylxanthone is a phosphodiesterase type 5 (PDE5) inhibitor with an IC50 value of 3.0 μM. 1,3,5-Trihydroxy-4-prenylxanthone inhibits Lipopolysaccharide (LPS) (HY-D1056)-induced NO production in RAW264.7 macrophages, and has anti-inflammatory activities.
    1,3,5-Trihydroxy-4-prenylxanthone
  • HY-112575
    Tiazotic acid
    		Modulator
    Tiazotic acid is a metabolic agent that has immunomodulatory, anti-inflammatory, antioxidant, anti-ischemic, cardio- and endothelioprotective, antiplatelet, hepatoprotective activities. Tiazotic acid increases the levels of eNOS. Tiazotic acid also reduces the level of D-dimer in the blood, which reduces the risks of heart attacks and strokes in post-COVID syndrome.
    Tiazotic acid
  • HY-N8812
    19-[(β-D-Glucopyranosyl)oxy]-19-oxo-ent-labda-8(17),13-dien-16,15-olide
    		Inhibitor
    19-[(β-D-Glucopyranosyl)oxy]-19-oxo-ent-labda-8(17),13-dien-16,15-olide, the metabolite of Neoandrographolide, inhibits nitric oxide (NO) production in lipopolysaccharide-activated macrophages.
    19-[(β-D-Glucopyranosyl)oxy]-19-oxo-ent-labda-8(17),13-dien-16,15-olide
  • HY-W754114
    Nalmefene Sulfate-d3
    Nalmefene Sulfate-d3 is the deuterium labeled Nalmefene (HY-107744). Nalmefene is a BBB-penetrable opioid receptor modulator. Nalmefene is an antagonist of MOR and DOR, and a partial agonist of KOR. Nalmefene has anti-inflammatory and neuroprotective activities. Nalmefene can be used in the research of reducing alcohol-dependent disorders.
    Nalmefene Sulfate-d<sub>3</sub>
  • HY-16151
    CR-3294
    		Inhibitor
    CR-3294 is an autophagy inducer in hypoxic cells. CR-3294 is an inducible enzyme nitric oxide synthase (iNOS) inhibitor. CR-3294 inhibits both the DNA binding of HIF-1alpha and VEGF mRNA synthesis. CR-3294 can be used for the study of breast cancer and inflammatory bowel disease (IBD), such as Crohn’s disease, ulcerative colitis.
    CR-3294
  • HY-182040
    Nrf2 activator-24
    		Inhibitor
    Nrf2 activator-24 is a Nrf2 activator with anti-inflammatory and antioxidant activities. Nrf2 activator-24 promotes the nuclear translocation of Nrf2, thereby inducing the expression of downstream antioxidant and cytoprotective genes. Nrf2 activator-24 inhibits cytokine-driven inflammatory responses in keratinocytes. Nrf2 activator-24 attenuates inflammation, nitrosation and oxidative stress responses in macrophages. Nrf2 activator-24 alleviates local inflammation and atopic dermatitis-like symptoms in DNCB-induced mouse models. Nrf2 activator-24 can be used in research related to atopic dermatitis.
    Nrf2 activator-24
  • HY-184214
    Antileishmanial agent-44
    		Activator
    Antileishmanial agent-44 is a histone deacetylase inhibitor targeting Leishmania donovani Sir2, with an IC50 of 0.652 μM against amastigotes. Antileishmanial agent-44 elevates ROS levels to induce oxidative stress, which causes mitochondrial membrane potential depolarization, cytochrome c release, phosphatidylserine externalization and DNA fragmentation, triggers apoptosis-like cell death, and arrests the cell cycle. Antileishmanial agent-44 upregulates the expression of Th1-type cytokines and NO in macrophages, reshapes host immune responses to eliminate intracellular parasites. Antileishmanial agent-44 inhibits parasites in infected golden hamsters in vivo. Antileishmanial agent-44 can be used for the research of visceral leishmaniasis.
    Antileishmanial agent-44
  • HY-P0184A
    Camstatin TFA
    		Inhibitor
    Camstatin TFA, a functionally active 25-residue fragment of PEP-19's IQ motif, binds calmodulin and inhibits neuronal nitric oxide (NO) synthase.
    Camstatin TFA
  • HY-N18187
    Hirundigoside E
    		Inhibitor
    Hirundigoside E is a compound with anti-inflammatory activity. Hirundigoside E inhibits LPS (HY-D1056)-induced iNOS protein expression in macrophages. Hirundigoside E can be used for the research of inflammatory diseases.
    Hirundigoside E
  • HY-D3250
    PYSNO
    PYSNO is a lysosome-targeted fluorescent probe based on a pyridazinone skeleton (λem=515-565 nm, λex=405 nm) that can be used to track nitric oxide (NO) production in vivo. PYSNO exhibits a rapid, highly sensitive and highly selective "turn-on" response to endogenous and exogenous NO by blocking photoinduced electron transfer and regulating radiative decay rates. PYSNO enables precise in vivo monitoring in a mouse model of myocardial fibrosis and can be applied to the research of related diseases.
    PYSNO
  • HY-N1531
    Randaiol
    		Inhibitor
    Randaiol is an antioxidant that can be isolated from the stem bark of Magnolia officinalis. Randaiol inhibits LPS-induced NO production and has anti-inflammatory and antioxidant activities.
    Randaiol
  • HY-N15744
    Anti-Heart Failure Agent 3
    		Inhibitor
    Anti-Heart Failure Agent 3 (Compound 2) is an anti-heart failure agent with anti-inflammatory activity found in processed Cornus officinalis. Anti-Heart Failure Agent 3 inhibits NO release in LPS-induced RAW264.7 cells. Anti-Heart Failure Agent 3 alleviates myocardial ischemia-reperfusion injury, reduces myocardial infarction size, and improves myocardial histopathological changes. Anti-Heart Failure Agent 3 is promising for research of heart failure.
    Anti-Heart Failure Agent 3
  • HY-N11544
    Inflexuside B
    		Inhibitor
    Inflexuside B, an abietane diterpenoid, can be isolated from the aerial parts of Isodon inflexus. Inflexuside B strongly inhibits lipopolysaccharide (LPS)-activated NO Synthase in RAW264.7 macrophages.
    Inflexuside B
  • HY-B1092AS2
    Gluconate-d6 sodium
    Gluconate-d6 sodium (D-Gluconic acid sodium salt-d6) is the deuterium labeled Gluconate sodium (HY-B1092A). Gluconate sodium (D-Gluconic acid sodium salt) is an orally active glucose derivative. Gluconate sodium reduces nitric oxide and inflammatory cytokines (IL-1β and IL-6). Gluconate sodium inhibits ERK phosphorylation. Gluconate sodium has antioxidant and antiplatelet activation activities. Gluconate sodium has antitumor activity against colorectal cancer. Gluconate sodium improves osteoarthritis, intestinal damage and acute lung injury.
    Gluconate-d<sub>6</sub> sodium
  • HY-149339
    hnNOS-IN-2
    hnNOS-IN-2 (compound 17) is a human neuronal nitric oxide synthase (hnNOS) inhibitor with good metabolic stability. hnNOS-IN-2 can be used for research in neurodegenerative diseases.
    hnNOS-IN-2
  • HY-18729AR
    L-NAME hydrochloride (Standard)
    		Inhibitor
    L-NAME (hydrochloride) (Standard) is the analytical standard of L-NAME (hydrochloride). This product is intended for research and analytical applications. L-NAME hydrochloride 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 hydrochloride (Standard)
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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