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-141411
    (Rac)-Zevaquenabant
    		Inhibitor 99.20%
    (Rac)-Zevaquenabant ((Rac)-MRI-1867, compound 6b) is a cannabinoid receptor type 1 (CB1R)/iNOS antagonist, with a Ki of 5.7 nM for CB1R. (Rac)-Zevaquenabant is potential for the research of liver fibrosis.
    (Rac)-Zevaquenabant
  • HY-P2307
    Tat-NR2Baa
    Tat-NR2BAA is the control peptide of Tat-NR2B9c (HY-P0117), inactive. The sequence of Tat-NR2BAA 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
  • HY-N0811
    Anemarsaponin B
    		Inhibitor 99.43%
    Anemarsaponin B is a steroidal saponin. Anemarsaponin B decreases the protein and mRNA levels of iNOS and COX-2. Anemarsaponin B reduces the expressions and productions of pro-inflammatory cytokines, including TNF-a and IL-6. Anemarsaponin B inhibits the nuclear translocation of the p65 subunit of NF-κB by blocking the phosphorylation of IκBα. Anemarsaponin B also inhibits the phosphorylation of MAP kinase kinases 3/6 (MKK3/6) and mixed lineage kinase 3 (MLK3). Anti-inflammatory effect .
    Anemarsaponin B
  • HY-B1041A
    Aminoguanidine
    		Inhibitor
    Aminoguanidine (Pimagedine hydrochloride) is an inhibitor of diamine oxidase and nitric oxide synthase. Aminoguanidine has a dose-dependent inhibitory effect on apoptosis induced by Doxorubicin (HY-15142). Aminoguanidine has antioxidant properties. Aminoguanidine can be used in diabetic nephropathy research.
    Aminoguanidine
  • HY-129876
    D-NAME hydrochloride
    		Inhibitor
    D-NAME (D-NG-nitroarginine methyl ester) hydrochloride is a potent nitric oxide synthase (NOS) inhibitor. D-NAME hydrochloride inhibits the activity of NOS, reducing the production of nitric oxide.
    D-NAME hydrochloride
  • HY-146971
    Anti-inflammatory agent 38
    		Inhibitor 98.66%
    Anti-inflammatory agent 38 (compound 23d) is a potent Nrf2/HO-1 pathway inhibitor, with an IC50 value of 0.38 μM for NO. Anti-inflammatory agent 38 can significantly reduce the level of ROS in cells. Anti-inflammatory agent 38 can be used for researching anti-inflammatory.
    Anti-inflammatory agent 38
  • HY-18734
    Carboxy-PTIO
    		Inhibitor
    Carboxy-PTIO is a potent nitric oxide (NO) scavenger that can make a quick reaction with NO to produce NO2. Carboxy-PTIO can prevent hypotension and endotoxic shock through the direct scavenging action against NO in lipopolysaccharide-stimulated rat model.
    Carboxy-PTIO
  • HY-N1187
    Syzalterin
    		Inhibitor 99.05%
    Syzalterin is an inhibitor of NO production with an IC50 of 1.87 μg/mL.
    Syzalterin
  • 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-N1989
    Bacoside A
    		Modulator
    Bacoside A is an orally active, blood-brain barrier-permeable triterpenoid saponin that modulates the activities of ATPases, AChE, CaMK2A and iNOS. Derived from Bacopa monniera. Bacoside A exerts significant antioxidant, anti-inflammatory and anti-apoptotic effects by maintaining ion balance, scavenging reactive oxygen species, stabilizing cell membranes, and regulating the expression of NF-κB and apoptosis-related proteins. Bacoside A counteracts morphine-induced reductions in Na+/K+-ATPase, Ca2+-ATPase and Mg2+-ATPase activities, increases mitochondrial membrane potential, and decreases intracellular reactive oxygen species levels. Bacoside A specifically binds to calcium/calmodulin-dependent protein kinase IIA to trigger endoplasmic reticulum calcium release. Bacoside A exhibits non-apoptotic cytotoxicity against glioblastoma cells while protecting normal nerve cells from stress-induced damage. Bacoside A is applicable to the research of Parkinson's disease and glioblastoma multiforme.
    Bacoside A
  • HY-N2406R
    Dihydrocaffeic acid (Standard)
    		Activator
    Ditalimfos (Standard) is the analytical standard of Ditalimfos. This product is intended for research and analytical applications. Ditalimfos is an organophosphate fungicide. Ditalimfos is mainly used in agriculture to control fungal diseases of crops. Ditalimfos can be used for fungal resistance studies and risk assessment of residues in the environment.
    Dihydrocaffeic acid (Standard)
  • HY-19440
    Esonarimod
    		Control 99.85%
    Esonarimod (KE-298) is an antirheumatic agent.
    Esonarimod
  • HY-B1092AR
    Gluconate sodium (Standard)
    		Inhibitor
    Gluconate (D-Gluconic acid) (Standard) is the analytical standard of Gluconate sodium (HY-B1092A). This product is intended for research and analytical applications. Gluconate (D-Gluconic acid) sodium is an orally active glucose derivative. Gluconate sodium reduces nitric oxide and inflammatory cytokines (IL-1β and IL-6). Gluconate sodium inhibits ERK phosphorylation. Gluconate sodium has antioxidant and antiplatelet activation activities. Gluconate sodium has antitumor activity against colorectal cancer. Gluconate sodium improves osteoarthritis, intestinal damage and acute lung injury.
    Gluconate sodium (Standard)
  • HY-Y0488AR
    Formic acid ammonium (Standard)
    		Activator
    Formic acid ammonium (Standard) is the analytical standard of Formic acid ammonium. This product is intended for research and analytical applications. Formic acid ammonium is the ammonium salt form of formic acid, which is an endogenous metabolite. Formic acid ammonium activates the nitric oxide/cyclic guanosine monophosphate (NO/cGMP) signaling pathway in endothelial cells and inhibits calcium ion influx in vascular smooth muscle cells, resulting in vasomotor relaxation. Formic acid ammonium inhibits cytochrome C oxidase (CcO) and disrupts the electron transport chain, leading to ATP depletion. Formic acid ammonium can be used as a feed additive, which can lower the feed pH value, inhibit the growth of microorganisms (such as Escherichia coli, Salmonella), and extend the shelf life of the feed.
    Formic acid ammonium (Standard)
  • HY-N6607R
    Tryptanthrin (Standard)
    		Inhibitor
    Tryptanthrin (Standard) is the analytical standard of Tryptanthrin. This product is intended for research and analytical applications. Tryptanthrin is an indole quinazoline that could be an alkaloid from indigo-bearing plants. Tryptanthrin is a potent and orally active cellular Leukotriene (LT) biosynthesis inhibitor. Tryptanthrin has anticancer activity. Tryptanthrin suppresses the expression levels of NOS1, COX-2, and NF-κB and regulates the expression levels of IL-2, IL-10, and TNF-α.
    Tryptanthrin (Standard)
  • HY-N7700
    Guluronic acid
    		Inhibitor 98.90%
    Guluronic acid (G2013) is an orally active oxidative stress regulator and anti-inflammatory agent that exerts pharmacological effects by down-regulating various pro-inflammatory and oxidative stress-related genes (such as TLR4, NF-κB, iNOS, etc.) and inhibiting the activities of COX-2, MMPs and VEGF. Low-dose Guluronic acid up-regulates the expression of immunoregulatory genes SHIP1 and SOCS1, thereby effectively inhibiting cancer-related inflammation, tumor angiogenesis, cell adhesion and metastasis, while reducing the accumulation of immunosuppressive cells. Guluronic acid significantly prolongs the survival time of tumor-bearing hosts within a concentration range without direct cytotoxicity, demonstrating favorable safety. Guluronic acid has involved in the research of multiple sclerosis, ankylosing spondylitis, breast cancer and other inflammatory diseases.
    Guluronic acid
  • HY-B0464S
    Hydralazine-d4 (hydrochloride)
    		Inhibitor
    Hydralazine-d4 hydrochloride is the deuterium labeled Hydralazine hydrochloride. 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>4</sub> (hydrochloride)
  • HY-124996
    (Rac)-ZLc-002
    		Inhibitor 98.96%
    (Rac)-ZLc-002, an inhibitor of nNOS interaction with nitric oxide synthase 1 adaptor protein (NOS1AP), suppresses inflammatory nociception and chemotherapy-induced neuropathic pain and synergizes with Paclitaxel (HY-B0015) to reduce tumor cell viability.
    (Rac)-ZLc-002
  • 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-B1409S
    Isosorbide dinitrate-13C6
    Isosorbide dinitrate-13C6 is the 13C labeled Isosorbide dinitrate. Isosorbide dinitrate (ISDN) is an NO donor that prevents LV remodeling and degradation of cardiac function following myocardial infarction (MI).
    Isosorbide dinitrate-<sup>13</sup>C<sub>6</sub>
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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