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-12122
    AR-C102222
    		Inhibitor
    AR-C102222 is a spirocyclic fluoropiperidine quinazoline selective iNOS inhibitor. AR-C102222 can be used for the research of neuropathic pain.
    AR-C102222
  • HY-149724
    Anti-inflammatory agent 65
    		Inhibitor
    Anti-inflammatory agent 65 (compound 29) is a Hederagonic acid derivative with potent anti-inflammatory activity. Anti-inflammatory agent 65 inhibits nitric oxide (NO) release. Anti-inflammatory agent 65 inhibits the nuclear translocation of IRF3 and p65, and disrupts the STING/IRF3/NF-κB signaling pathway, thereby attenuating the inflammatory response.
    Anti-inflammatory agent 65
  • HY-129440R
    N-(p-Coumaroyl) Serotonin (Standard)
    		Inhibitor
    N-(p-Coumaroyl) Serotonin (Standard) is the analytical standard of N-(p-Coumaroyl) Serotonin (HY-129440). This product is intended for research and analytical applications. N-(p-Coumaroyl) Serotonin is an orally active polyphenol found in safflower seeds with potent anti-inflammatory, antioxidant, and antitumor activities. N-(p-Coumaroyl) Serotonin suppresses NF‑κB, TLR4/MyD88 and MAPK signaling, activates NQO1/HO‑1 pathways, and inhibits pro‑inflammatory cytokines, iNOS and COX‑2 and ROS production. N-(p-Coumaroyl) Serotonin induces S‑phase arrest and apoptosis in glioblastoma cells, reduces atherosclerotic lesions, and alleviates renal and vascular injuries. N-(p-Coumaroyl) Serotonin acts as a vasodilator, regulates calcium dynamics. N-(p-Coumaroyl) Serotonin can be used for the research of neurodegenerative diseases, atherosclerosis, glioblastoma, and acute renal failure.
    N-(p-Coumaroyl) Serotonin (Standard)
  • HY-B0679R
    Lubiprostone (Standard)
    		Inhibitor
    Lubiprostone (Standard) is the analytical standard of Lubiprostone. This product is intended for research and analytical applications. Lubiprostone (SPI-0211) increases intestinal fluid secretion through generation of CIC-2/CFTR and activation of cAMP signaling pathway. Lubiprostone inhibits myeloperoxidase (MPO) activity, downregulates Indomethacin (HY-14397)-induced iNOS and TNFα expression. Lubiprostone can be used for chronic constipation research.
    Lubiprostone (Standard)
  • HY-122063
    FR260330
    		Inhibitor
    FR260330 is a selective, orally active inhibitor for inducible nitric oxide synthase (iNOS) through suppression of iNOS dimerization. FR260330 inhibits the NO accumulation in rat splenocytes and human DLD-110 cells, with IC50 of 27 and 10 nM. FR260330 ameliorates the Lipopolysaccharides (HY-D1056)-induced inflammatory diseases in rats model.
    FR260330
  • HY-N1500R
    Pulegone (Standard)
    		Inhibitor
    Pulegone (Standard) is the analytical standard of Pulegone (HY-N1500). This product is intended for research and analytical applications. Pulegone is a monoterpene ketone compound widely present in the essential oils of many plants. Pulegone can also be used as a bird repellent. Pulegone has multiple activities such as anti-inflammatory, antibacterial, antifungal, and anti-hyperalgesic effects. Pulegone is particularly effective against bacteria of the Salmonella species.
    Pulegone (Standard)
  • HY-W753779
    8-Hydroxygenistein
    		Inhibitor
    8-Hydroxygenistein (8-OHG) is an antioxidant that can effectively scavenge nitric oxide (NO) and superoxide anion (O₂⁻). 8-Hydroxygenistein belongs to ortho-dihydroxy isoflavones (ODI) and is abundantly present in dark soy sauce and light soy sauce. Its antioxidant activity is stronger than that of its parent compound genistein (HY-14596). The content of 8-Hydroxygenistein is positively correlated with the antioxidant capacity of soy sauce (r = 0.959), and it remains highly stable even after being heated in boiling water for 60 minutes. During the brewing and storage of soy sauce, 8-Hydroxygenistein effectively prevents oxidative damage, making it promising for use in food antioxidant research.
    8-Hydroxygenistein
  • HY-N0635R
    Prim-O-glucosylcimifugin (Standard)
    		Inhibitor
    Prim-O-glucosylcimifugin (Standard) is the analytical standard of Prim-O-glucosylcimifugin. This product is intended for research and analytical applications. Prim-O-glucosylcimifugin exerts anti-inflammatory effects through the inhibition of iNOS and COX-2 expression by through regulating JAK2/STAT3 signaling.
    Prim-O-glucosylcimifugin (Standard)
  • HY-B1773AS1
    Sodium propionate-13C-1
    		Inhibitor
    Sodium propionate-13C-1 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-1
  • HY-N9896
    Anhydronotoptol
    		Inhibitor
    Anhydronotoptol is a potent nitric oxide inhibitory coumarin. Anhydronotoptol inhibits NO production in RAW 264.7 cells induced by LPS with an IC50 value of 36.6 μM.
    Anhydronotoptol
  • HY-N12224
    1-Heptadecanoyl-rac-glycerol
    		Inhibitor 98.0%
    1-Heptadecanoyl-rac-glycerol (1-Heptadecanoin) is a glyceride compound with anti-inflammatory activity. 1-Heptadecanoyl-rac-glycerol inhibits the occurrence of inflammation by suppressing the expression of inducible nitric oxide synthase (iNOS) related to inflammation. 1-Heptadecanoyl-rac-glycerol can be used for research on diseases related to inflammation.
    1-Heptadecanoyl-rac-glycerol
  • HY-N3182A
    N-Methylnuciferine iodide
    		Inhibitor
    N-Methylnuciferine iodide, an alkaloid from Lotus Plumule, ameliorate lipopolysaccharide-induced depression-like behavior.
    N-Methylnuciferine iodide
  • 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-B0464R
    Hydralazine hydrochloride (Standard)
    		Inhibitor
    Hydralazine (hydrochloride) (Standard) is the analytical standard of Hydralazine (hydrochloride). This product is intended for research and analytical applications. 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 hydrochloride (Standard)
  • 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-160121
    Patrinoside aglucone
    		Inhibitor
    Patrinoside aglucone (Compound 8) is an iridoid glucoside that can be isolated from the Valeriana tuberosa. Patrinoside aglucone has potent anticancer activity with G2/M phase tumor cell cycle arrest and apoptosis induction. Patrinoside aglucone also significantly inhibits the proliferation of cancer stem cells (such as MDA-MB-231 and U-251MG cells). Patrinoside aglucone has great anti-inflammatory activity by inhibiting NO release (IC50: 43.44 μM) and significantly reduces the level of TNF-α, IL-1β, IL-6, PGE2 and COX-2.
    Patrinoside aglucone
  • HY-183944
    BN80933
    		Inhibitor
    BN80933 is a selective neuronal nitric oxide synthase (nNOS) inhibitor with a rat Ki of 0.92 μM. BN80933 inhibits lipid peroxidation, and blocks hypoxia-induced lactate dehydrogenase elevation and delayed 8-epiprostaglandin F2α elevation. BN80933 can be used for the research of stroke, and traumatic brain injury.
    BN80933
  • HY-N2180R
    (+)-Eudesmin (Standard)
    		Inhibitor
    Pinoresinol dimethyl ether (Standard) is the analytical standard of Pinoresinol dimethyl ether (HY-N2180). This product is intended for research and analytical applications. Pinoresinol dimethyl ether ((+)-Eudesmin) is a non-phenolic furanoid lignin. Pinoresinol dimethyl ether can be isolated from Magnolia biondii. Pinoresinol dimethyl ether activates MAPK, PKC, and PKA upstream pathways and inhibits NO levels. Pinoresinol dimethyl ether has neuroprotective activity.
    (+)-Eudesmin (Standard)
  • HY-P992108
    Efadirelaxin alfa
    		Activator
    Efadirelaxin alfa (RELAX10) is a highly selective agonist of relaxin/insulin-like family peptide receptor RXFP1. After subcutaneous administration in animal experiments, Efadirelaxin alfa exhibits a significantly prolonged terminal half-life (7 days in mice, 3.75 days in rats), and shows no activity against related receptors such as RXFP2 and RXFP3. Efadirelaxin alfa has significant anti-cardiac hypertrophy and anti-fibrotic effects. Efadirelaxin alfa effectively attenuates and reverses cardiac hypertrophy and collagen deposition by regulating the TGF-β1/Smad2 and AKT/eNOS signaling pathways. Efadirelaxin alfa improves cardiac systolic function without causing fluctuations in blood pressure or heart rate, demonstrating favorable safety. Efadirelaxin alfa is currently mainly used in studies related to heart failure.
    Efadirelaxin alfa
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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