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-122949
    Momordicine I
    		Agonist
    Momordicine I is a cucurbitane-type triterpenoids. Momordicine I suppresses glioma growth by promoting apoptosis and impairing mitochondrial oxidative phosphorylation. Momordicine I inhibits glycolysis, lipid metabolism, induces autophagy in HNC cells to suppress head and neck cancer growth. Momordicine I alleviates isoproterenol-induced cardiomyocyte hypertrophy through suppression of PLA2G6 and DGK-ζ. Momordicine I exerts its cardiovascular benefits by upregulating nitric oxide, inhibiting the activity of angiotensin-converting enzyme (ACE), activating the PI3K/Akt pathway, reducing oxidative stress and inflammation. Momordicine I inhibits AKT1, IL-6, and SRC, suggesting its potential application in type 2 diabetes.
    Momordicine I
  • HY-W074890S
    Palmitoylglycine-d31
    		99.40%
    Palmitoylglycine-d31 is the deuterium labeled Palmitoylglycine.
    Palmitoylglycine-d<sub>31</sub>
  • HY-B2141
    Bendazol
    		Activator 99.60%
    Bendazol is an orally effective antihypertensive agent. Bendazol acts directly on vascular smooth muscle to dilate blood vessels and reduce peripheral resistance, thereby improving blood circulation. Bendazol significantly inhibits the development of myopia in rabbit models. Bendazol can regulate kidney function by increasing the activity of NO synthase in the rat model of nephrogenic hypertension. In addition, Bendazol has an effect on sexual behavior and spermatogenesis in male rats.
    Bendazol
  • HY-101410R
    SDMA (Standard)
    		Inhibitor
    SDMA (Standard) is the analytical standard of SDMA. This product is intended for research and analytical applications. SDMA (Symmetric dimethylarginine) is an endogenous inhibitor of nitric oxide (NO) synthase activity. SDMA, a novel kidney biomarker, permits earlier diagnosis of kidney disease than traditional creatinine testing.
    SDMA (Standard)
  • HY-B0464S1
    Hydralazine-d5 (hydrochloride)
    		Inhibitor 99.9%
    Hydralazine-d5 (hydrochloride) is deuterium-labeled Hydralazine (hydrochloride) (HY-B0464). Hydralazine hydrochloride is an orally active, blood-brain barrier-permeable DNA methyltransferase inhibitor with vasodilatory, arterial smooth muscle relaxant and hypotensive activities. Hydralazine hydrochloride reactivates silenced tumor suppressor genes via mediating DNA demethylation, while exerting neuroprotective and anti-inflammatory properties. Hydralazine hydrochloride inhibits NOS-2 (iNOS) and COX-2, and reduces the production of NO and PGEE2; meanwhile, Hydralazine hydrochloride scavenges reactive oxygen species and inhibits macrophage activation. Hydralazine hydrochloride alleviates motor dysfunction, neuropathic inflammatory pain, and formalin-induced somatic and emotional pain responses. In addition, Hydralazine hydrochloride directly induces DNA strand breaks and sister chromatid exchange, exhibiting certain mutagenic characteristics. Hydralazine hydrochloride has been widely used in studies on hypertension, various cancers (such as cervical cancer, leukemia), spinal cord injury and the mechanisms of inflammatory pain.
    Hydralazine-d<sub>5</sub> (hydrochloride)
  • HY-168376
    9(10)-Nitrooleate
    		Activator 99.0%
    9 (10)-Nitrooleate (9(10)-Nitrated oleic acid) is an endogenous lipid signaling mediator with vasoprotective effects. 9 (10)-Nitrooleate enhances enzymatic activity and improves nitric oxide bioavailability by inducing phosphorylation of Akt and ERK1/2, regulating the multi-site phosphorylation status of eNOS and optimizing its interaction with Hsp90. 9 (10)-Nitrooleate also activates PPARα, PPARδ and PPARγ receptors, thereby regulating adipogenesis, glucose uptake and inflammation-related gene expression, and exhibits immunosuppressive effects by inhibiting neutrophil migration and cytokine secretion. 9 (10)-Nitrooleate is widely used in studies of sepsis and related inflammatory diseases.
    9(10)-Nitrooleate
  • HY-N7656
    5,7,8-Trimethoxyflavone
    		99.70%
    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-100573S
    Necrosulfonamide-d4
    		Inhibitor 99.65%
    Necrosulfonamide-d4 is the deuterium labeled Necrosulfonamide (HY-100573). Necrosulfonamide is a MLKL and Gasdermin D (GSDMD) inhibitor, capable of separately inhibiting necroptosis and pyroptosis of cells. Necrosulfonamide does not affect the activation of upstream signals, but specifically inhibits the downstream executor oligomerization step. Necrosulfonamide reduces the expression of the key kinases NLRP3 and caspase-1 involved in necroptosis and pyroptosis, activate the Nrf2 pathway and the downstream antioxidant enzymes, and also downregulates a variety of inflammatory factors. Necrosulfonamide plays significant roles in various diseases such as neurodegenerative diseases (such as Parkinson’s disease), tissue damage and ischemia-reperfusion injury, inflammatory bowel disease, osteoarthritis and fracture repair, and hair loss by regulating two important programmed necrosis pathways.
    Necrosulfonamide-d<sub>4</sub>
  • HY-N0278
    Anemonin
    		Inhibitor 99.41%
    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
  • HY-N0006R
    Demethoxycurcumin (Standard)
    Demethoxycurcumin (Standard) is the analytical standard of Demethoxycurcumin. This product is intended for research and analytical applications. Demethoxycurcumin is one of the main active ingredients of curcumin, which has anti-inflammatory, antioxidant, antibacterial, anti-cancer and neuroprotective effects. Demethoxycurcumin is orally active. Demethoxycurcumin can be used in inflammation, cancer and Alzheimer's disease research.
    Demethoxycurcumin (Standard)
  • HY-14536R
    Methylene Blue (Standard)
    		Inhibitor
    Methylene Blue (Standard) is the analytical standard of Methylene Blue. This product is intended for research and analytical applications. Methylene blue (Basic Blue 9) 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 through the nitric oxide syntase/guanylate cyclase signalling pathway to reduce prepulse inhibition. Methylene blue is a REDOX cycling compound and able to cross the blood-brain barrier. Methylene blue is a Tau aggregation inhibitor. Methylene blue reduces cerebral edema, attenuated microglial activation and reduced neuroinflammation.
    Methylene Blue (Standard)
  • HY-N8435
    Desoxo-narchinol A
    		Inhibitor 98.0%
    Desoxo-narchinol A is an orally active and potent anti-inflammatory agent. Desoxo-narchinol A can be isolated from the roots and rhizomes of Nardostachys jatamansi. Desoxo-narchinol A can be used for septic shock and inflammatory diseases research.
    Desoxo-narchinol A
  • HY-138564
    NOS-IN-1
    		Inhibitor 98.18%
    NOS-IN-1 is a potent and orally active NO synthase (NOS) isoforms inhibitor with IC50s of 0.1 μM, 1.1 μM, and 0.2 μM for human iNOS (hiNOS), heNOS and hnNOS, respectively.
    NOS-IN-1
  • HY-113216R
    Asymmetric dimethylarginine (Standard)
    		Inhibitor
    Hesperetin (Standard) is the analytical standard of Hesperetin. This product is intended for research and analytical applications. Hesperetin is a natural flavanone, and acts as a potent and broad-spectrum inhibitor against human UGT activity. Hesperetin regulates apoptosis.
    Asymmetric dimethylarginine (Standard)
  • HY-N9337
    Amaroswerin
    		Inhibitor 98.78%
    Amaroswerin is a bioactive secoiridoid glucoside from Swertia mussotii. Amaroswerin has anti-inflammatory, antidiabetic, antiviral, anticholinergic and immunomodulatory activities. Amaroswerin inhibits NO release with an IC50 value of 5.42 μg/mL in RAW264.7 cells.
    Amaroswerin
  • HY-126858
    Ambuic acid
    		Inhibitor 98.00%
    Ambuic acid exhibits antimicrobial activity against Staphylococcus aureus, with IC50 of 43.9 μM for strain ATCC 6538. Ambuic acid is an inhbitor for the biosynthesis of cyclic peptide quorum sensing molecules (quormones) in gram-positive bacteria. Ambuic acid exhibits anti-inflammatory activity through ERK/JNK/MAPK signaling pathway.
    Ambuic acid
  • HY-169402
    PDE1-IN-9
    		Inhibitor
    PDE1-IN-9 (Compound 7a) is a selective inhibitor for phosphodiesterase 1 (PDE1), that inhibits PDE1C with an IC50 of 11 nM. PDE1-IN-9 reduces mRNA expression of IL-1β, IL-6, TNF-α and iNOS, inhibits the production of nitric oxide (NO) and reactive oxygen species (ROS). PDE1-IN-9 exhibits good metabolic stability in rat liver microsomes.
    PDE1-IN-9
  • HY-101316
    TRIM
    		Inhibitor 99.90%
    TRIM is a potent nitric oxide synthase inhibitor. TRIM inhibits mouse cerebellar nNOS and rat lung iNOS in vitro with IC50 values of 28.2 and 27.0 µM, respectively. Antidepressant- and anxiolytic-like effects.
    TRIM
  • HY-N0455AS3
    L-Arginine-1-13C hydrochloride
    		Activator 99.60%
    L-Arginine-1-13C (hydrochloride) is the 13C-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-1-<sup>13</sup>C hydrochloride
  • HY-141508
    Flazin
    		Inhibitor 99.64%
    Flazin is a non-enzymatic protein glycation inhibitor, also inhibits peroxynitrite (ONOO-), with an IC50 value of 85.31 μM for bovine serum albumin (BSA) glycation and an EC50 value of 71.99 μM for ONOO-. Flazin can be used for researching diabetes and neuronal disorders. Flazin also can used as a lipid droplet (LD) regulator against lipid disorders, and a xanthine oxidase (XOD) inhibitor.
    Flazin
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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