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-N0875
    IKarisoside A
    		Inhibitor 99.44%
    IKarisoside A (Icarisoside-A) is a natural flavonol glycoside and has anti-inflammatory properties.
    IKarisoside A
  • HY-126193
    JS-K
    		Activator 99.59%
    JS-K is a NO donor that reacts with glutathione to generate NO at physiological pH. JS-K induces reactive oxygen species (ROS) to mediate apoptosis. JS-K induces autophagy. JS-K inhibits invasion. JS-K has a broad spectrum anti-proliferative activity in cancer cells. JS-K reduces tumor volume and causes necrosis of implanted tumors in mice.
    JS-K
  • HY-W047187
    Lavandoside
    		Inhibitor 99.98%
    Lavandoside is an ABTS?+ free radical scavenger and a moderate inhibitor of xanthine oxidase (XO), with an IC50 of 71.6 μM for inhibiting NO production in LPS-induced macrophages. Lavandoside exerts its antioxidant and potential anti-inflammatory effects by directly scavenging free radicals and inhibiting XO activity, a mechanism related to the hydroxyl groups in its molecular structure. Lavandoside can be isolated from lavender and can be used in the development of natural antioxidants and in research on oxidative stress-related diseases and inflammation-related diseases.
    Lavandoside
  • HY-13571AR
    Beclometasone dipropionate (Standard)
    		Inhibitor
    Beclometasone dipropionate (Standard) is the analytical standard of Beclometasone dipropionate. This product is intended for research and analytical applications. Beclometasone dipropionate, the proagent of Beclometasone, is an orally active and potent glucocorticoid recepter agonist. Beclometasone dipropionate acts via a glucocorticoid receptor and suppresses inflammation and hyperproliferation. Beclometasone dipropionate can be used for asthma .
    Beclometasone dipropionate (Standard)
  • HY-P0316A
    TP508 TFA
    		Activator 99.54%
    TP508 TFA is a 23-amino acid nonproteolytic thrombin peptide that represents a portion of the receptor-binding domain of thrombin molecule. TP508 TFA activates endothelial NO synthase (eNOS) and stimulates production of NO in human endothelial cells. TP508 TFA activates endothelial cells and stem cells to revascularize and regenerate tissues.
    TP508 TFA
  • HY-124481
    Oleocanthal
    		Inhibitor ≥99.0%
    Oleocanthal is an orally active phenolic seciridoid compound. Oleocanthal can be extracted from olive oil. Oleocanthal inhibits COX-1 and COX-2, reduces ROS and NO, and upregulates Nrf-2 and HO-1. Oleocanthal reduces Aβ deposition. Oleocanthal exhibits anti-Leishmania activity against promastigotes and amastigotes of L. major, with IC50 values of 18.7 and 87 μg/mL, respectively. Oleocanthal exhibits anticancer activity against colon, breast, liver, and melanoma cancers. Oleocanthal also exhibits anti-inflammatory and neuroprotective properties. Oleocanthal can be used in Alzheimer's disease research.
    Oleocanthal
  • HY-N6908
    Continentalic acid
    		Modulator 99.72%
    Continentalic acid is a diterpenoid organic acid. Continentalic acid exhibits multiple activities including anti-inflammatory, antioxidant, neuroprotective, antibacterial and antitumor effects. Continentalic acid alleviates oxidative stress, reduces pro-inflammatory cytokine production, inhibits MAPK phosphorylation and neutrophil infiltration, and induces growth inhibition and apoptosis of cancer cells. Continentalic acid can be used in research related to traumatic brain injury, cancer, inflammation and infections.
    Continentalic acid
  • HY-W005963
    Methyl 5-hydroxypyridine-2-carboxylate
    		Inhibitor 99.97%
    Methyl 5-hydroxypyridine-2-carboxylate is a phenolic acid that can found in the stems of Mahonia fortune. Methyl 5-hydroxypyridine-2-carboxylate exhibits NO inhibitory effects in vitro.
    Methyl 5-hydroxypyridine-2-carboxylate
  • HY-N12394
    Norwogonin-8-O-glucuronide
    		99.31%
    Norwogonin-8-O-glucuronide is a glucuronide that can be isolated from Scutellaria indica. Norwogonin-8-O-glucuronide has anti-inflammatory activity. Norwogonin-8-O-glucuronide is a flavone glycoside. Norwogonin-8-O-glucuronide inhibits NO production in macrophage RAW264.7 cells with an IC50 above 30 μM.
    Norwogonin-8-O-glucuronide
  • HY-N12735
    Hymenoxin
    		Inhibitor
    Hymenoxin (compound 7) is a dual inhibitor of iNOS and NF-κB with IC50 of 42.7 μM and 85.5 μM respectively. Hymenoxin can inhibit 16% of oxidative stress at a concentration of 125 μg/mL.
    Hymenoxin
  • HY-B1773AS
    Sodium propionate-13C
    		Inhibitor 99.6%
    Sodium propionate-13C is the 13C labeled Propionate sodium (HY-B1773A). Sodium propionate is an orally active short-chain fatty acid. Sodium propionate can be produced by intestinal bacteria from the metabolism of dietary fiber. Sodium propionate increases PPAR-γ, inhibits NF-κB activation, and reduces COX-2 expression and NO production. Sodium propionate also induces Apoptosis and Autophagy. Sodium propionate reduces HSV-1-induced keratitis. Sodium propionate has anticancer effects against glioblastoma. Sodium propionate exhibits neuroprotective, antioxidant, and anti-inflammatory activities. Sodium propionate can be used in the research of spinal cord injury and Alzheimer's disease.
    Sodium propionate-<sup>13</sup>C
  • HY-N10424
    Brazilein
    		Inhibitor 99.9%
    Brazilein is a compound with anti-inflammatory and neuroprotective activities, with an IC50 of 500 μM against guinea pig Na+,K+-ATPase. Brazilein reduces iNOS mRNA expression, thereby inhibiting nitric oxide production in immune cells. Brazilein suppresses inflammatory responses by reducing the mRNA expression of TNF-α and IL-6, but has no effect on IL-1β expression. Brazilein reduces the cerebral infarction volume and improves the neurological function scores of rats with cerebral ischemia-reperfusion injury. Brazilein induces apoptosis of splenic lymphocytes in mice. Brazilein inhibits humoral immune responses in mice, and causes thymus and spleen atrophy as well as body weight loss in mice. Brazilein also possesses antimalarial and antibacterial activities. Brazilein is also a red dye. Brazilein can be used in studies related to the infection, nervous system, cardiovascular system and inflammatory diseases.
    Brazilein
  • HY-118828B
    12-Oxo phytodienoic acid (≥90%)
    		Inhibitor
    12-Oxo phytodienoic acid (≥90%) (12-OPDA (≥90%)) is a plant lipid-derived anti-inflammatory compound. 12-Oxo phytodienoic acid (≥90%) induces the expression of SOCS-1 and inhibits LPS (HY-D1056)-induced activation of the NF-κB and p38 MAPK signaling pathways. 12-Oxo phytodienoic acid (≥90%) inhibits LPS-induced expression of IL-6 and TNF-α, and reduces LPS-induced NO production by decreasing iNOS levels. 12-Oxo phytodienoic acid (≥90%) induces activation of the Nrf2 signaling cascade. 12-Oxo phytodienoic acid (≥90%) can be used for the research of neurodegenerative diseases.
    12-Oxo phytodienoic acid (≥90%)
  • HY-107969
    Haloperidol decanoate
    		99.67%
    Haloperidol decanoate is a depot preparation of haloperidol, a commonly used butyrophenone derivative with antipsychotic activity. Haloperidol decanoate can increase the striatal D2 receptor in rat. Haloperidol decanoate can improve conditions of psychoses (mainly schizophrenia). Haloperidol decanoate can lead to increased accumulation of the dopamine metabolites homo-vanillic acid. Haloperidol decanoate can reduce intestinal transport, increase gastric emptying and reduce acid output in rat model.
    Haloperidol decanoate
  • HY-W419589
    Xanthomicrol
    		Inhibitor 99.14%
    Xanthomicrol is extracted from the resin of the plant called Chinese bellflower (a member of the Scrophulariaceae family) and is a monoamine oxidase (MAOs) inhibitor. Xanthomicrol has anti-tumor and anti-inflammatory properties, with IC50 values of 0.88 and 1.69 μg/mL in HL60 and K562 cells. Xanthomicrol's the main metabolite of 5DT in mouse colon, and it can reduce levels of iNOS protein and mRNA, as well as COX-2 protein levels. Additionally, Xanthomicrol decreases the production of the pro-inflammatory cytokine IL-1β and induces the expression of the antioxidant enzyme HO-1.
    Xanthomicrol
  • HY-N2008
    Luteolin 5-O-glucoside
    		Inhibitor ≥98.0%
    Luteolin 5-O-glucoside, a major flavonoidfrom Cirsium maackii, possesses anti-inflammatory activity. Luteolin 5-O-glucoside inhibits LPS-induced NO production and t-BHP-induced ROS generation. Luteolin 5-O-glucoside suppresses the expression of iNOS and COX-2 in macrophages.
    Luteolin 5-O-glucoside
  • HY-113216B
    Asymmetric dimethylarginine dihydrochloride
    		Inhibitor 99.99%
    Asymmetric dimethylarginine dihydrochloride is an endogenous NO synthase inhibitor that reduces NO production, which contributes to endothelial dysfunction and cardiovascular disease.
    Asymmetric dimethylarginine dihydrochloride
  • HY-W008646R
    7,8-Dihydro-L-biopterin (Standard)
    		Inhibitor
    NADH (disodium salt) (Standard) is the analytical standard of NADH (disodium salt). This product is intended for research and analytical applications. 7,8-Dihydro-L-biopterin is a NOS uncoupling inducer with blood-brain barrier permeability, and it is a reduced non-conjugated pteridine. 7,8-Dihydro-L-biopterin is the main metabolite of 4-amino-tetrahydro-L-biopterin, and it undergoes photooxidation to form biopterin. 7,8-Dihydro-L-biopterin promotes the conversion of nitric oxide synthase to a superoxide-producing form, thereby increasing oxidative stress levels in the renal outer medulla and inducing apoptosis. 7,8-Dihydro-L-biopterin is sensitive to the inhibitory effect of SOD, and it can be applied to research related to salt-sensitive hypertension, moderate to severe traumatic brain injury, and neurodegenerative diseases.
    7,8-Dihydro-L-biopterin (Standard)
  • HY-N7895
    Secologanic acid
    		Inhibitor 98.02%
    Secologanic acid is a secoiridoid glycoside. Secologanic acid inhibits NO production, the relative expression of AKT and p-AKT. Secologanic acid shows anti-inflammatory activity.
    Secologanic acid
  • HY-N1445R
    Isoquercitrin (Standard)
    		Inhibitor
    Isoquercetin (Standard) is the analytical standard of Isoquercetin. This product is intended for research and analytical applications. Isoquercetin (Quercetin 3-glucoside) is a naturally occurring polyphenol that has antioxidant, anti-proliferative, and anti-inflammatory properties. Isoquercetin alleviates ethanol-induced hepatotoxicity, oxidative stress, and inflammatory responses via the Nrf2/ARE antioxidant signaling pathway. Isoquercetin regulates the expression of nitric oxide synthase 2 (NO2) via modulating the nuclear factor-κB (NF-κB) transcription regulation system. Isoquercetin has high bioavailability and low toxicity, is a promising candidate agent to prevent birth defects in diabetic pregnancies.
    Isoquercitrin (Standard)
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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