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-P2307A
    Tat-NR2Baa TFA
    Tat-NR2BAA TFA is the control peptide of Tat-NR2B9c (HY-P0117), inactive. The sequence of Tat-NR2BAA TFA is similar to Tat-NR2B9c, but it has a double-point mutation in the COOH terminal tSXV motif, making it incapable of binding PSD-95. Tat-NR2B9c is a membrane-permeant peptide and disrupts PSD-95/NMDAR binding, correlate with uncoupling NR2B- and/or NR2A-type NMDARs from PSD-95.
    Tat-NR2Baa TFA
  • HY-N15651
    Asperflavin
    		Inhibitor
    Asperflavin is an anti-inflammatory compound that can be produced by the marine fungus Eurotium amstelodami. Asperflavin inhibits the production of NO, PGE2, and proinflammatory cytokines, as well as the expression of inducible NOS (iNOS) in RAW 264.7 cells treated with LPS (HY-D1056). Asperflavin can be used in the study of inflammatory diseases.
    Asperflavin
  • HY-N0997
    (6E)-1,7-Bis(4-hydroxyphenyl)-6-hepten-3-one
    		Inhibitor
    (6E)-1,7-Bis(4-hydroxyphenyl)-6-hepten-3-one (compound7) is a nature product isolated from rhizomes of Curcuma kwangsiensis. (6E)-1,7-Bis(4-hydroxyphenyl)-6-hepten-3-one has inhibitory effect on NO production induced by LPS in macrophages with an IC50 value of 8.93 μM.
    (6E)-1,7-Bis(4-hydroxyphenyl)-6-hepten-3-one
  • HY-183272
    PI3K/Akt/mTOR-IN-7
    		Inhibitor
    PI3K/Akt/mTOR-IN-7 is an AKT/mTOR and JAK2/STAT3 inhibitor. PI3K/Akt/mTOR-IN-7 restores p-Akt, p-mTOR, and p-STAT3 expression, reduces pro-apoptotic Caspase-3 mRNA expression. PI3K/Akt/mTOR-IN-7 reduces intracellular ROS accumulation and inhibits NO production. PI3K/Akt/mTOR-IN-7 can be used for research on stroke, Alzheimer's disease and Parkinson's disease.
    PI3K/Akt/mTOR-IN-7
  • HY-180829
    HDAC6-IN-71
    		Inhibitor
    HDAC6-IN-71 (Compound 24) is a HDAC6 inhibitor with IC50 values for HDAC6 and HDAC1 of 13.68 and 443.12 nM respectively. HDAC6-IN-71 effectively inhibits the production of NO by mouse macrophages, with its IC50 being 2.31 μM. HDAC6-IN-71 inhibits the HDAC6-NF-κB signaling pathway, reduces the levels of phosphorylated IκB-α and IKK-α/β, and suppresses the expression of downstream inflammatory proteins COX-2 and iNOS. HDAC6-IN-71 significantly alleviates ulcerative colitis in mice.
    HDAC6-IN-71
  • HY-125740R
    Malvidin-3-glucoside chloride (Standard)
    		Inhibitor
    Malvidin-3-glucoside (Malvidin-3-O-glucoside; Oenin) chloride (Standard) is the analytical standard of Malvidin-3-glucoside chloride (HY-125740). This product is intended for research and analytical applications. Malvidin-3-glucoside chloride is an orally active inhibitor of the NF-κB pathway, which blocks inflammatory responses induced by TNF-α, reduces IκB-α degradation and p65 nuclear translocation, and upregulates endothelial nitric oxide synthase eNOS to increase NO production. Malvidin-3-glucoside chloride exerts anti-inflammatory and antioxidant effects by inhibiting pro-inflammatory molecules such as MCP-1, ICAM-1, and IL-6, and regulating intestinal microorganisms and metabolites, while protecting endothelial cells and improving intestinal microecological dysbiosis under inflammatory conditions. Malvidin-3-glucoside chloride can be used to study chronic inflammatory-related diseases such as atherosclerosis and inflammatory bowel disease, and has the potential to prevent vascular inflammation and improve intestinal health.
    Malvidin-3-glucoside chloride (Standard)
  • HY-W700616
    Cicletanine hydrochloride
    		Activator
    Cicletanine hydrochloride is an orally active Furopyridine-derivative antihypertensive agent. Cicletanine hydrochloride stimulates NO release. Cicletanine hydrochloride induces effective pulmonary vasodilation.
    Cicletanine hydrochloride
  • HY-N17638
    7-Oxomogroside V
    		Inhibitor
    7-Oxomogroside V is a cucurbitane-type glycoside isolated from the fruits of Siraitia grosvenorii. 7-Oxomogroside V inhibits the activation of Epstein-Barr virus early antigen (EBV-EA) induced by TPA (HY-18739). 7-Oxomogroside V also exerts weak inhibitory effects on the activation of the nitric oxide donor NOR 1. 7-Oxomogroside V is applicable to tumor-related research.
    7-Oxomogroside V
  • HY-N6602R
    α-Solanine (Standard)
    		Inhibitor
    α-Solanine (Standard) is the analytical standard of α-Solanine. This product is intended for research and analytical applications. α-solanine, a bioactive component and one of the major steroidal glycoalkaloids in Solanum nigrum, has been observed to inhibit growth and induce apoptosis in cancer cells.
    α-Solanine (Standard)
  • HY-N2715
    6-Methoxynaringenin
    		Inhibitor
    6-Methoxynaringenin is a natural flavonoid that inhibits NO production with an IC50 of 25.8 μM.
    6-Methoxynaringenin
  • HY-117212
    Ronopterin
    		Inhibitor
    Ronopterin (VAS203) is a NO Synthase inhibitor. Ronopterin can be used in research on diseases of the urogenital system and the nervous system.
    Ronopterin
  • HY-N17579
    (Rac)-Isogosferol
    		Control
    (Rac)-Isogosferol ((Rac)-Isogospherol) is a furanocoumarin present in the fruits of Cnidium monnieri(L.) Cusson.
    (Rac)-Isogosferol
  • HY-B0531S
    Triflusal-d3
    		Modulator
    Triflusal-d3 is deuterium labeled Triflusal (HY-B0531). Triflusal is an orally bioavailable, blood-brain barrier-permeable dual Cyclooxygenase-1 (COX-1)/cAMP phosphodiesterase inhibitor. Triflusal inhibits platelet aggregation, NF-κB activation, iNOS activity, and prostaglandin synthesis in ischaemic tissue. Triflusal stimulates neutrophil nitric oxide production, eNOS protein expression, and cNOS activity. Triflusal alleviates cerebral ischemic injury in rats and ameliorates pathological lesions and related gene expression in transgenic Alzheimer’s disease models. Triflusal can be used for the research of thromboembolic/ischemic cardiovascular and cerebrovascular diseases, and Alzheimer’s disease.
    Triflusal-d<sub>3</sub>
  • HY-W010066R
    3,4-Dihydroxyphenylglycol (Standard)
    		Inhibitor
    3,4-Dihydroxyphenylglycol (Standard) is the analytical standard of 3,4-Dihydroxyphenylglycol (HY-W010066). This product is intended for research and analytical applications. 3,4-Dihydroxyphenylglycol is a phenolic compound and antioxidant. 3,4-Dihydroxyphenylglycol can be extracted from olive oil. 3,4-Dihydroxyphenylglycol downregulates the expression of proinflammatory enzymes (iNOS, COX-2) and prevents the degradation of IκBα. 3,4-Dihydroxyphenylglycol has antioxidant properties. 3,4-Dihydroxyphenylglycol has shown positive effects on frozen-thawed ram sperm. 3,4-Dihydroxyphenylglycol can be used in the study of inflammatory-related diseases (such as ulcerative colitis) and reproductive health (sperm cryopreservation).
    3,4-Dihydroxyphenylglycol (Standard)
  • HY-181711
    nNOS-IN-6
    		Inhibitor
    nNOS-IN-6 is a human neuronal nitric oxide synthase (hnNOS) inhibitor with a human hnNOS Ki of 16 nM, ~1800-fold selectivity over human eNOS, ~2900-fold selectivity over human iNOS, and a rat nNOS Ki of 34 nM.nNOS-IN-6 exhibits high effective permeability in PAMPA-BBB assays, crosses the blood-brain barrier, and shows sustained systemic exposure, low clearance, and robust brain penetration in mouse in vivo pharmacokinetic studies.nNOS-IN-6 can be used for the research of neurodegenerative diseases, melanoma.
    nNOS-IN-6
  • HY-18732C
    L-NMMA hydrochloride
    		Antagonist
    L-NMMA (Tilarginine) hydrochloride is a non-selective and competitive inhibitor of nitric oxide synthase. L-NMMA hydrochloride inhibits three subtypes, namely nNOS, eNOS, and iNOS, and reduces NO production. L-NMMA hydrochloride alleviates mechanical allodynia, thermal hyperalgesia, and choroidal fibrosis. L-NMMA hydrochloride is applicable to research related to nociception, bone cancer pain, and myopia.
    L-NMMA hydrochloride
  • HY-P10385
    SPSB2-iNOS inhibitory cyclic peptide-3
    SPSB2-iNOS inhibitory cyclic peptide-3 (Compound CP3) is an inhibitor for the interaction of SPRY domain and SOCS-box protein 2 (SPSB2) and iNOS, through binding SPSB2 on iNOS site with KD of 7 nM.
    SPSB2-iNOS inhibitory cyclic peptide-3
  • HY-128754R
    Monoolein (Standard)
    		Inhibitor
    Monoolein is a biocompatible lipid molecule that can be used as a carrier for bone repair. Monoolein exhibits anti-inflammatory activity by inhibiting the immune response induced by LPS (HY-D1056). It exerts its anti-inflammatory effects by reducing the production of immune response factors such as IL-12 p40, IL-6, and TNF-α, and inhibiting the generation of NO. Monoolein can be used in drug delivery and research in the field of inflammatory diseases .
    Monoolein (Standard)
  • HY-116474R
    Viridicatol (Standard)
    		Inhibitor
    Viridicatol (Standard) is the analytical standard of Viridicatol (HY-116474). This product is intended for research and analytical applications. Viridicatol is a quinolone alkaloid with anti-inflammatory, antibacterial, antifungal, osteogenic and chondrogenic activities. Viridicatol reduces the phosphorylation levels of ERK, JNK, p38 and STAT6; inhibits MMP-2, MMP-9, NF-κB signaling pathway and PTP1B; downregulates genes related to mast cell activation; and binds to SHN3 to activate the Wnt/SHN3 signaling pathway. Viridicatol inhibits the expression of pro-inflammatory mediators and cytokines, and promotes osteogenic/chondrogenic differentiation. Viridicatol can be used in studies related to fibrosarcoma, allergy, bacterial infection, fungal infection and osteoporosis.
    Viridicatol (Standard)
  • HY-169103
    Neuroprotective agent 5
    		Inhibitor
    Neuroprotective agent 5 (compound 28) is a brain permeabilizing agent with anti-neuritis, anti-oxidative damage and neuroprotective effects. Neuroprotective agent 5 exhibits a potent NO inhibitory effect (EC50=0.49 μM), inhibits the release of proinflammatory factors PGE2 and TNF-α, downregulates the expression of iNOS and COX-2 proteins, and promotes the polarization of BV-2 cells from the proinflammatory M1 phenotype to the anti-inflammatory M2 phenotype. In addition, Neuroprotective agent 5 can also inhibit acetylcholinesterase (AChE) activity and Aβ42 aggregation in a dose-dependent manner. Neuroprotective agent 5 can be used for the study of Alzheimer's disease.
    Neuroprotective agent 5
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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