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-B1409R
    Isosorbide dinitrate (Standard)
    		Activator
    Isosorbide dinitrate (Standard) is the analytical standard of Isosorbide dinitrate. This product is intended for research and analytical applications. Isosorbide dinitrate (ISDN) is an NO donor that prevents LV remodeling and degradation of cardiac function following myocardial infarction (MI).
    Isosorbide dinitrate (Standard)
  • HY-U00432B
    S-MTC acetate
    		Inhibitor
    S-MTC acetate (S-Methyl-L-thiocitrulline acetate) acts as a powerful inhibitor of inducible nitric oxide synthase, favoring the inhibition of constitutive (neuronal) nitric oxide synthase over inducible (endothelial) nitric oxide synthase.
    S-MTC acetate
  • HY-N0859B
    Schisanchinin D
    		Modulator
    Schisanchinin D is an NO release inhibitor found in the fruits of Schisandra chinensis. Schisanchinin D can inhibit the release of nitric oxide (NO) by lipopolysaccharide (LPS)-activated microglia in primary murine BV2 microglia cells. Schisanchinin D is promising for research of neurodegenerative diseases such as Alzheimer's disease (AD).
    Schisanchinin D
  • HY-101304
    S-Isopropylisothiourea hydrobromide
    		Inhibitor ≥98.0%
    S-Isopropylisothiourea (IPTU) hydrobromide is a potent and selective inhibitor of Nitric Oxide Synthase (NOS). S-Isopropylisothiourea (IPTU) hydrobromide is used in the research for hemorrhagic shock.
    S-Isopropylisothiourea hydrobromide
  • HY-101238R
    Agmatine sulfate (Standard)
    		Inhibitor
    Agmatine (sulfate) (Standard) is the analytical standard of Agmatine (sulfate). This product is intended for research and analytical applications. Agmatine sulfate exerts modulatory action at multiple molecular targets, such as neurotransmitter systems, ion channels and nitric oxide synthesis. It is an endogenous agonist at imidazoline receptor and a NO synthase inhibitor.
    Agmatine sulfate (Standard)
  • HY-101251R
    AMT hydrochloride (Standard)
    		Inhibitor
    AMT (hydrochloride) (Standard) is the analytical standard of AMT (hydrochloride). This product is intended for research and analytical applications. AMT hydrochloride is a selective inhibitor of inducible NOS (iNOS) with Ki of 4.2 nM[1].
    AMT hydrochloride (Standard)
  • 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)
  • HY-N0396R
    Harpagoside (Standard)
    		Inhibitor
    Harpagoside (Standard) is the analytical standard of Harpagoside. This product is intended for research and analytical applications. Harpagoside can be obtained by Harpagophytum procumbens, which has anti-inflammatory, anti-cancer, protective activity, and efficacy. Harpagoside has an inhibitory effect on COX-1 and COX-2 active, and suppresses NO production. Harpagoside inhibits HepG2 cell lipid polysaccharide, which is a protein that is expressed horizontally and selectively, and has anti-inflammatory and latent pain effects. Harpagoside has the ability to protect the body, and has a degenerative effect on the β-oxidation (Aβ).
    Harpagoside (Standard)
  • HY-17007S2
    Saquinavir-13C6
    		Inhibitor
    Saquinavir-13C6 (Ro 31-8959-13C6) is 13C labeled Saquinavir (HY-17007). Saquinavir (Ro 31-8959) is an orally active HIV protease inhibitor that can be used in the research of AIDS. Saquinavir also has anti-inflammatory activity and can induce apoptosis of human red blood cells.
    Saquinavir-<sup>13</sup>C<sub>6</sub>
  • HY-N8012
    Multinoside A
    		Inhibitor
    Multinoside A (compound 6) is an antioxidant with DPPH free radical scavenging activity (IC50=54.3 μg/mL). Multinoside A can also downregulate COX-2 expression (IC50=9.6 μg/mL) and inhibit NO production (IC50=43.9 μg/mL).
    Multinoside A
  • HY-149671
    Anti-inflammatory agent 63
    		Inhibitor
    Anti-inflammatory agent 63 is an anti-inflammatory agent that shows optimal inhibitory activity (EC50 = 5.33±0.57 μM) against the production of nitric oxide (NO) induced by lipopolysaccharide (LPS) in RAW264.7 cells.
    Anti-inflammatory agent 63
  • HY-N15334
    Tricrozarin A
    		Inhibitor
    Tricrozarin A is a Naphthazarin (HY-N7526) derivative, which is found in fresh bulbs of Tritonia crocosmaeflora. Tricrozarin A exhibits antimicrobial activity against gram-positive bacteria, fungi, and yeast.
    Tricrozarin A
  • HY-10230R
    Midostaurin (Standard)
    		Activator
    Midostaurin (Standard) is the analytical standard of Midostaurin. This product is intended for research and analytical applications. Midostaurin (PKC412; CGP 41251) is an orally active, reversible multi-targeted protein kinase inhibitor. Midostaurin inhibits PKCα/β/γ, Syk, VEGFR2/KDR/Flk-1, Akt, PKA, c-Kit, c-Fgr, c-Src, FLT3, PDFRβ and VEGFR1/Flt-1/2 with IC50s ranging from 22-500 nM. Midostaurin also upregulates endothelial nitric oxide synthase (eNOS) gene expression. Midostaurin shows powerful anticancer effects.
    Midostaurin (Standard)
  • HY-N1330
    Rubranol
    		Inhibitor
    Rubranol is an inhibitor of NO Synthase. Rubranol inhibits LPS-induced NO production in activated macrophages with 74% inhibition.
    Rubranol
  • HY-N9086A
    (rac)-Poriol
    		Ligand
    (rac)-Poriol (5,7,4'-Trihydroxy-6-methylflavanone) exhibits antioxidant activity, and scavenges free radical DPPH with an IC50 of 0.18 µg/mL. (rac)-Poriol inhibits the LPS (HY-D1056)-induced NO generation in RAW264.7 (98.35% inhibition rate at 10 μM), and exhibits anti-inflammatory activity. (rac)-Poriol exhibits good binding affinity with iNOS, COX-1, COX-2, TNF-α, and IL-1β.
    (rac)-Poriol
  • HY-N0761AR
    trans-Isoferulic acid (Standard)
    		Inhibitor
    trans-Isoferulic acid (Standard) is the analytical standard of trans-Isoferulic acid. This product is intended for research and analytical applications. trans-Isoferulic acid (trans-3-Hydroxy-4-methoxycinnamic acid) is an aromatic acid isolated from the roots of Clematis florida var. plena. trans-Isoferulic acid exhibits anti-inflammatory activity.trans-isoferulic acid suppresses NO and PGE2 production through the induction of Nrf2-dependent heme oxygenase-1 (HO-1).
    trans-Isoferulic acid (Standard)
  • HY-N6968R
    α-Humulene (Standard)
    		Inhibitor
    α-Humulene (Standard) is the analytical standard of α-Humulene. This product is intended for research and analytical applications. α-Humulene is a main constituent of Tanacetum vulgare L. (Asteraceae) essential oil with anti-inflammation (IC50=15±2 μg/mL). α-Humulene inhibits COX-2 and iNOS expression.
    α-Humulene (Standard)
  • HY-N13706
    3β,15α-Dihydroxy-7,11,23-trioxo-lanost-8-dien-26-oic acid
    		Inhibitor
    3β,15α-Dihydroxy-7,11,23-trioxo-lanost-8-dien-26-oic acid is a triterpene compound that can be found in Ganoderma lucidum, and it inhibits nitric oxide (NO) production in BV-2 microglial cells induced by lipopolysaccharide (LPS, HY-D1056), with an IC50 of 6.50 μM, making it a potential candidate for anti-inflammatory research.
    3β,15α-Dihydroxy-7,11,23-trioxo-lanost-8-dien-26-oic acid
  • HY-N15272
    Artocarpesin
    		Inhibitor
    Artocarpesin is a flavonoid compound. Artocarpesin has inhibitory effects on methicillin-resistant Staphylococcus aureus (MRSA). Artocarpesin inhibits the production of NO, PGE2 and ROS by inhibiting COX-2 and iNOS expression, and plays an anti-inflammatory role. In addition, Artocarpesin inhibits platelet aggregation by inhibiting cyclic nucleotides and MAPKs, which can be used in the study of cardiovascular diseases.
    Artocarpesin
  • 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)
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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