1. Signaling Pathways
  2. Immunology/Inflammation
  3. NO Synthase

NO Synthase

Nitric oxide synthases; NOS

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.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-N0569R
    Madecassic acid (Standard)
    Inhibitor
    Madecassic acid (Standard) is the analytical standard of Madecassic acid. This product is intended for research and analytical applications. Madecassic acid is isolated from Centella asiatica (Umbelliferae). Madecassic acid has anti-inflammatory properties caused by iNOS, COX-2, TNF-alpha, IL-1beta, and IL-6 inhibition via the downregulation of NF-κB activation in RAW 264.7 macrophage cells.
    Madecassic acid (Standard)
  • HY-N6919
    Cauloside C
    Inhibitor 99.66%
    Cauloside C is a triterpene glycoside isolated from Caulophyllum robustum Max. Cauloside C exerts anti-inflammatory effects through the inhibition of expression of iNOS and proinflammatory cytokines.
    Cauloside C
  • HY-18730
    1400W
    Inhibitor
    1400W is a slow, tight binding, and highly selective inducible nitric-oxide synthase (iNOS) inhibitor, with a Kd value ≤ 7 nM. 1400W inhibits iNOS induction in microglial cells, and reduces generation of NO, thereby mitigating oxidative stress and neuronal cell apoptosis in the rat cerebral cortex, and improving the spatial memory dysfunction caused by acute hypobaric hypoxia-reoxygenation.
    1400W
  • HY-W419589
    Xanthomicrol
    Inhibitor
    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-127029A
    Umbelliprenin
    Inhibitor 99.93%
    Umbelliprenin, a prenylated coumarin, is an antioxidant with anticancer, anti-inflammatory and immunomodulatory effects. Umbelliprenin inhibits lipoxygenase managing the inflammation pathways. In inflammatory macrophages, Umbelliprenin suppresses nitric oxide production as well as inducible nitric oxide synthase (NO synthase).
    Umbelliprenin
  • HY-N3473
    Isomaculosidine
    Inhibitor 99.42%
    Isomaculosidine is an alkaloid that can be isolated from D. dasycarpus. Isomaculosidine can inhibit nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated BV2 microglial cells.
    Isomaculosidine
  • HY-N13175
    Panaxcerol B
    Inhibitor
    Panaxcerol B is a monogalactosyl monoacylglyceride, with an IC50 of 59.4 μM for NO production in LPS-stimulated RAW264.7 cells.
    Panaxcerol B
  • HY-W004843
    3-Amino-1,2,4-triazine
    Inhibitor ≥98.0%
    3-Amino-1,2,4-triazine is an inhibitor of NO synthase, and also inhibits nitrite secretion.
    3-Amino-1,2,4-triazine
  • HY-N8090
    (3β,7β,12β,20Z)-3,7,12-Trihydroxy-11,15,23-trioxo-lanost-8,20-dien-26-oic acid
    Inhibitor
    (3β,7β,12β,20Z)-3,7,12-Trihydroxy-11,15,23-trioxo-lanost-8,20-dien-26-oic acid, a lanostane triterpenoids, exhibits obvious NO inhibitory activity on n LPS-induced BV-2 microglia cells with an IC50 of 9.55 uM. (3β,7β,12β,20Z)-3,7,12-Trihydroxy-11,15,23-trioxo-lanost-8,20-dien-26-oic acid has anti-inflammatory activities.
    (3β,7β,12β,20Z)-3,7,12-Trihydroxy-11,15,23-trioxo-lanost-8,20-dien-26-oic acid
  • HY-N8761
    Kihadanin A
    Inhibitor
    Kihadanin A (compound 3) is a limonoid NOS3 inhibitor that can be isolated from the methanol extract of Dictamnus dasycarpus root bark. Kihadanin A is useful in the study of hyperuricemia (HUA)[3].
    Kihadanin A
  • HY-131929
    AE-ITU dihydrobromide
    Inhibitor ≥98.0%
    AE-ITU dihydrobromide is the dihydrobromide form of AE-ITU. AE-ITU dihydrobromide is a selective inhibitor for inducible NO synthase (iNOS), and attenuates the liver dysfunction caused by endotoxaemia in rats.
    AE-ITU dihydrobromide
  • HY-107584
    BYK 191023 dihydrochloride
    Inhibitor 99.63%
    BYK 191023 is a highly selective inducible nitric-oxide synthase (iNOS) inhibitor. BYK 191023 interacts with the catalytic center of the enzyme. BYK 191023 can be used to study the in vivo and in vitro effects mediated by iNOS .
    BYK 191023 dihydrochloride
  • HY-W923189
    Neral
    Inhibitor
    Neral is a monoterpene compound that has anti-inflammatory and anti-cancer properties. Neral can inhibit TNF-α and IL-6, and it also suppresses inflammatory mediators like pro-IL-1β, iNOS, COX-2, and NLRP-3.
    Neral
  • 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-N2908R
    Atraric acid (Standard)
    Inhibitor
    Atraric acid (Standard) is the analytical standard of Atraric acid. This product is intended for research and analytical applications. Atraric acid (Methyl atrarate) is a specific androgen receptor (AR) antagonist with anti-inflammatory and anticancer effects. Atraric acid represses the expression of the endogenous prostate specific antigen gene in both LNCaP and C4-2 cells. Atraric acid can also inhibit the synthesis of NO and cytokine, and suppress the MAPK-NFκB signaling pathway. Atraric acid can be used to research prostate diseases and inflammatory diseases[1][2].
    Atraric acid (Standard)
  • HY-133126
    hDDAH-1-IN-1
    Inhibitor
    hDDAH-1-IN-1 (compound 8a) is a potent and selective non-amino acid catalytic site inhibitor of human dimethylarginine dimethylaminohydrolase-1 (hDDAH-1), with a Ki of 18 μM. DDAH mediates ADMA metabolism, thereby regulating nitric oxide production in a variety of disease states.
    hDDAH-1-IN-1
  • HY-133145A
    hDDAH-1-IN-2 sulfate
    Inhibitor
    hDDAH-1-IN-2 is a selective, orally active human dimethylarginine dimethylaminohydrolase-1 (hDDAH-1) inhibitor. hDDAH-1-IN-2 reveals an excellent profile regarding cell toxicity/viability.
    hDDAH-1-IN-2 sulfate
  • HY-12118
    L-NIL dihydrochloride
    Inhibitor
    L-NIL dihydrochloride is an inducible NO synthase inhibitor, with an IC50 of 3.3 μM for miNOS.
    L-NIL dihydrochloride
  • HY-118700AR
    2-Iminobiotin hydrobromide (Standard)
    Inhibitor
    H-Gly-Gly-Gly-OH (Standard) is the analytical standard of H-Gly-Gly-Gly-OH. This product is intended for research and analytical applications. H-Gly-Gly-Gly-OH, also known as Triglycine, is a tripeptide composed of glycine, glycine and glycine, which are linked by peptide bonds. Often used as a model compound in the study of protein structure and function. Glycylglycylglycine also acts as a neurotransmitter in the central nervous system and has been shown to have antioxidant properties. Furthermore, it may have potential research roles in various diseases such as cancer, diabetes and neurodegenerative diseases.
    2-Iminobiotin hydrobromide (Standard)
  • HY-133126A
    hDDAH-1-IN-1 TFA
    Inhibitor
    hDDAH-1-IN-1 TFA (compound 8a) is a potent and selective non-amino acid catalytic site inhibitor of human dimethylarginine dimethylaminohydrolase-1 (hDDAH-1), with a Ki of 18 μM.
    hDDAH-1-IN-1 TFA
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