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-173153
    BRAFV600E/JNK-IN-1
    		Inhibitor
    BRAFV600E/JNK-IN-1 (Compound 14c) is an inhibitor of JNK1, JNK2, JNK3 and BRAFV600E, with IC50 values of 0.51 μM, 0.53 μM, 1.02 μM and 0.009 μM, respectively. BRAFV600E/JNK-IN-1 can inhibit the phosphorylation of MEK1/2 and ERK1/2. In addition, BRAFV600E/JNK-IN-1 can inhibit tumor cell proliferation, NO release and PGE2 production, and has anti-tumor and anti-inflammatory activities.
    BRAFV600E/JNK-IN-1
  • HY-108040
    NCX-6560
    		Activator
    NCX-6560 is an orally active nitric oxide releasing derivative of atorvastatin that inhibits cholesterol biosynthesis and has anti-inflammatory and antithrombotic activity.
    NCX-6560
  • HY-N17528
    Triptohypol E
    		Inhibitor
    Triptohypol E is a triterpenoid compound and nitric oxide production inhibitor that can be isolated from the leaves of Rhododendron dauricum L. Triptohypol E inhibits nitric oxide production in LPS-stimulated macrophages in a dose-dependent manner.
    Triptohypol E
  • HY-172934
    FGT-4
    		Agonist
    FGT-4 is a folate receptor β (FR-β) targeting chimeric molecule. FGT-4 is a TLR7 agonist. FGT-4 facilitates the secretion of iNOS and proinflammatory cytokine IL-6 associated with M1 macrophages and enhances the proliferation of cytotoxic CD8+ T cells. FGT-4 has anti-tumor activity in the 4T1 breast cancer mouse model. FGT-4 can be used for the study of cancer immunity. (Pink: target protein TLR7/8 agonist 1 ligand (HY-103698); black: linker (HY-172936); blue: FR-β ligand (HY-172935)).
    FGT-4
  • HY-N15507
    Harzianoside A
    		Inhibitor
    Harzianoside A is a diterpene aminoglycoside compound discovered from Trichoderma sp. SCSIOW21. Harzianoside A has the activity of inhibiting the production of NO and can be used in the research of the anti-inflammatory field.
    Harzianoside A
  • HY-W251598J
    Sodium bicarbonate, United States Pharmacopeia (USP) Reference Standard
    Sodium bicarbonate, United States Pharmacopeia (USP) Reference Standard is an inorganic salt. Sodium bicarbonate, United States Pharmacopeia (USP) Reference Standard 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, United States Pharmacopeia (USP) Reference Standard is widely used in the fields of food, cosmetics, etc. Its main uses include buffers, flavoring agents, disinfectants, pharmaceuticals, and proton gradient regulators. Sodium bicarbonate, United States Pharmacopeia (USP) Reference Standard is also commonly used as an antacid to inhibit gastrointestinal diseases, neutralize gastric acid, and reduce gastric discomfort.
    Sodium bicarbonate, United States Pharmacopeia (USP) Reference Standard
  • HY-N9092
    Geranyl ferulate
    		Inhibitor
    Geranyl ferulate ((E)-geranylferulic acid), isolated from Zingiber officinale, exhibits inhibitory effect on the production of nitric oxide (NO).
    Geranyl ferulate
  • HY-160938
    β-Funaltrexamine
    		Inhibitor
    β-Funaltrexamine (β-FNA) is a blood-brain barrier-permeable, selective and irreversible μ-opioid receptor antagonist with immunomodulatory, anti-inflammatory and neuroprotective activities. β-Funaltrexamine inhibits p38 MAPK and TLR4 signaling by blocking μ-opioid receptors, and reduces the transcriptional activities of NF-κB, AP-1, CREB and Stat. Furthermore, β-Funaltrexamine inhibits iNOS activation and pro-inflammatory microglial polarization, converting microglia to an anti-inflammatory phenotype, thereby downregulating neuroinflammation and ameliorating neuronal degeneration. β-Funaltrexamine is widely applicable to research related to stroke, cerebral ischemia/reperfusion injury and neurodegenerative diseases.
    β-Funaltrexamine
  • HY-146167
    iNOS/PGE2-IN-1
    		Inhibitor
    iNOS/PGE2-IN-1 (compound 4a), an iNOS/PGE2 inhibitor, is a potent anti-inflammatory agent. iNOS/PGE2-IN-1 can inhibit LPS-induced NO production. iNOS/PGE2-IN-1 possesses low ulcerogenic liabilities.
    iNOS/PGE2-IN-1
  • HY-N17678
    (E)-Sinapoyl glucose
    		Inhibitor
    (E)-Sinapoyl glucose is an inflammatory pathway inhibitor. (E)-Sinapoyl glucose inhibits NO production in RAW 264.7 cells with an IC50 value of 38.32 µM. (E)-Sinapoyl glucose is promising for research of inflammatory diseases.
    (E)-Sinapoyl glucose
  • HY-101410A
    SDMA (p-hydroxyazobenzene-p′-sulfonate)
    		Inhibitor
    SDMA p-hydroxyazobenzene-p′-sulfonate is the p-hydroxyazobenzene-p′-sulfonate salt form of SDMA (HY-101410). SDMA p-hydroxyazobenzene-p′-sulfonate is an endogenous inhibitor of nitric oxide synthase (NO synthase) activity. SDMA p-hydroxyazobenzene-p′-sulfonate is an activator for NF-κB, and promotes the expression of IL-6 and TNF-α. SDMA p-hydroxyazobenzene-p′-sulfonate is stable in serum and plasma, and can be used as a kidney biomarker of hepatic and renal dysfunction.
    SDMA (p-hydroxyazobenzene-p′-sulfonate)
  • HY-116885
    Thunalbene
    		Inhibitor
    Thunalbene is a stilbene derivative isolated from Thunia alba. Thunalbene has a weak inhibitory effect on nitric oxide production and is not cytotoxic.
    Thunalbene
  • HY-N11996
    Aloenin aglycone
    Aloenin aglycone (compound 13) is an NF-κB inhibitor that can be isolated from aloe exudate. Aloenin aglycone inhibits TNFα-induced NF-κB transcriptional activity (IC50: 18.7 μM). Aloenin aglycone (10 μM) also reduced inducible nitric oxide synthase (iNOS) and intercellular adhesion molecule 1 (ICAM-1) gene expression after treatment of HepG2 cells with 10 ng/mL TNFα.
    Aloenin aglycone
  • HY-179473
    MK-0626
    		Activator
    MK-0626 is a selective, orally active DPP-4 inhibitor with an IC50 of 6.3 nM. MK-0626 increases endothelial nitric oxide synthetase expression. MK-0626 improves neovascularization, attenuates hepatic steatosis, attenuates pancreatic islet injury. MK-0626 can be used in the research of diabetes and non-alcoholic fatty liver disease.
    MK-0626
  • HY-181156
    Anti-inflammatory agent 112
    		Inhibitor
    Anti-inflammatory agent 112 is an inducible nitric oxide synthase (iNOS) inhibitor, a COX-2 inhibitor, and an anti-inflammatory agent. Anti-inflammatory agent 112 suppresses i-NOS and COX-2 protein expression, reduces nitric oxide, IL-6, and TNF-α production, and attenuates lipopolysaccharide (LPS)-induced inflammatory responses. Anti-inflammatory agent 112 can be used for the research of inflammatory disorders.
    Anti-inflammatory agent 112
  • HY-N2838
    Alismol
    		Inhibitor
    Alismol is a natural sesquiterpene. Alismol shows promising inhibitory effects on INF-γ-induced nitric oxide production in murine macrophage RAW264.7 cells.
    Alismol
  • HY-W040045R
    Callistephin chloride (Standard)
    		Inhibitor
    Callistephin (Pelargonidin 3-O-glucoside) chloride (Standard) is the analytical standard of Callistephin chloride (HY-W040045). This product is intended for research and analytical applications. Callistephin chloride is an anthocyanin. Callistephin chloride regulates the expression of inflammatory (reducing iNOS/TNF-α/COX-2) and apoptosis-related proteins by inhibiting p38 phosphorylation, and enhances the protective effect of Isoflurane (HY-A0134) on microglial cell damage. Callistephin chloride significantly reduces ROS levels, eliminates DPPH free radicals, protects retinal pigment epithelial cells, and inhibits lipid peroxidation. Callistephin chloride can alleviate glutamate excitotoxicity, reduce neuronal apoptosis, and protect cerebellar granule neurons. Callistephin chloride can inhibit the proliferation and metastasis of breast cancer cells by inducing apoptosis.
    Callistephin chloride (Standard)
  • HY-N17490
    Echinochlorin A
    Echinochlorin A is a fatty acid derivative present in Echinochloa utilis.
    Echinochlorin A
  • HY-181436
    CAY10563
    CAY10563 is a pH-regulated NO donor. Under acidic conditions, CAY10563 releases NO via an acid-catalyzed ring-opening mechanism, generating sulfur-centered free radicals. CAY10563 induces pH-dependent vasodilation. CAY10563 can be used in studies related to cardiovascular and cerebrovascular diseases.
    CAY10563
  • HY-135451
    CFM 1571
    CFM 1571 is a soluble guanylyl cyclase (sGC) activator with an IC50 of ~5.5 μM. CFM 1571 activates sGC in a NO-independent manner and exerts a synergistic effect with NO. CFM 1571 inhibits platelet aggregation.
    CFM 1571
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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