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-131898
    PTIO
    		Inhibitor 99.80%
    PTIO is a specific scavenger of NO and redox mediator. PTIO reacts with •NO to form the corresponding imino nitroxides and •NO2. PTIO enhances organic contaminants oxidation by permanganate.
    PTIO
  • HY-112868B
    ABH hydrochloride
    		Activator 99.90%
    ABH (hydrochloride) is an orally active arginase inhibitor (Ki = 8.5 nM). ABH hydrochloride promotes NO production and reduces the expression of inflammatory response-related molecules (ICAM-1, VCAM-1, MCP-1). ABH hydrochloride improves erectile function, reduces lung damage, promotes wound healing, reduces arterial blood pressure, and improves vascular fibrosis.
    ABH hydrochloride
  • HY-D0145
    7-Ethoxyresorufin
    		Inhibitor 99.61%
    7-Ethoxyresorufin (Resorufin ethyl ether) is a fluorometric substrate and competitive inhibitor of cytochrome P450, especially CYP1A1. 7-Ethoxyresorufin also inhibits NO synthase.
    7-Ethoxyresorufin
  • HY-Y1267
    Magnesium sulfate
    		99.63%
    Magnesium sulfate is a calcium antagonist and a potent L-type calcium channel inhibitor, as well as a tocolytic. Magnesium sulfate has anti-inflammatory, anticonvulsant, vasodilatory, and neuroprotective effects. Magnesium sulfate can be used in the research of diseases such as preeclampsia/eclampsia.
    Magnesium sulfate
  • HY-N0006
    Demethoxycurcumin
    		99.95%
    Demethoxycurcumin is one of the main active ingredients of curcumin, which has anti-inflammatory, antioxidant, antibacterial, anti-cancer and neuroprotective effects. Demethoxycurcumin is orally active. Demethoxycurcumin can be used in inflammation, cancer and Alzheimer's disease research.
    Demethoxycurcumin
  • HY-B1359
    Methylene blue trihydrate
    		Inhibitor 98.0%
    Methylene blue trihydrate (C.I. Basic Blue 9 trihydrate) is a guanylyl cyclase (sGC), monoamine oxidase A (MAO-A) and NO synthase (NOS) inhibitor. Methylene blue trihydrate is a vasopressor and is often used as a dye in several medical procedures. Methylene blue trihydrate has antinociception, antimalarial, antidepressant and anxiolytic activity effects. Methylene Blue trihydrate has the potential for methemoglobinemias, neurodegenerative disorders and ifosfamide-induced encephalopathytreatment.
    Methylene blue trihydrate
  • HY-17003
    Saquinavir mesylate
    		Inhibitor 99.40%
    Saquinavir (Ro 31-8959) mesylate is an orally active HIV protease inhibitor that can be used in the research of AIDS. Saquinavir mesylate also has anti-inflammatory activity and can induce apoptosis of human red blood cells.
    Saquinavir mesylate
  • HY-Y0488A
    Formic acid ammonium
    		Activator 98.47%
    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
  • HY-B0679
    Lubiprostone
    		Inhibitor 99.09%
    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
  • HY-79457
    S-Methylisothiourea sulfate
    		Inhibitor 99.94%
    S-Methylisothiourea sulfate is a potent, selective and competitive inhibitor of inducible nitric oxide synthase (iNOS). S-Methylisothiourea sulfate exerts beneficial effects in rodent models of septic shock.
    S-Methylisothiourea sulfate
  • HY-170621
    STAT1/3-IN-1
    		Inhibitor 99.23%
    STAT1/3-IN-1 is a potent STAT1/3 inhibitor with potent anti-inflammatory effect. STAT1/3-IN-1 inhibits phosphorylation and nuclear translocation of STAT1/3 to modulate microglial inflammation, reduces LPS (HY-D1056)-induced pro-inflammatory cytokines (NO, IL-1β, IL-6, and TNF-α) and inflammatory mediators (iNOS, COX-2). STAT1/3-IN-1 exhibits low toxicity in mice. STAT1/3-IN-1 can be used for the research of neuroinflammation.
    STAT1/3-IN-1
  • HY-101394
    Spermine NONOate
    		98.07%
    Spermine NONOate is a complex of nitric oxide (NO) with spermine and acts as a NO donor. Spermine NONOate can be used for NO aqueous solutions preparing.
    Spermine NONOate
  • HY-131697
    FeTPPS
    		Inhibitor 99.9%
    FeTPPS, a 5,10,15,20-tetrakis (4-sulfonatophenyl) porphyrin iron III chloride peroxynitrite decomposition catalyst, possesses evident neuroprotective effects in a experimental model of spinal cord damage. FeTPPS acts as a peroxynitrite scavenger and anti-nitrating agent in vivo. FeTPPS reduces nitric oxide (NO) production and apoptosis process.
    FeTPPS
  • HY-N6966
    Ethyl Caffeate
    		Inhibitor 99.34%
    Ethyl Caffeate is a natural phenolic compound isolated from Bidens pilosa. Ethyl caffeate suppresses NF-κB activation and its downstream inflammatory mediators, inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), and prostaglandin E2 (PGE2) in vitro or in mouse skin.
    Ethyl Caffeate
  • HY-N6607
    Tryptanthrin
    		Inhibitor 99.89%
    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
  • HY-N0826
    Corynoline
    		Inhibitor 98.84%
    Corynoline is an orally active acetylcholinesterase (AChE) inhibitor with an IC50 of 30.6 μM. Corynoline exhibits multiple activities including anti-inflammatory, antinociceptive, antitumor and analgesic effects. Corynoline can be used in the research of diseases such as tumors and inflammatory pain.
    Corynoline
  • HY-N0455R
    L-Arginine (Standard)
    		Activator
    L-Arginine (Standard) is the analytical standard of L-Arginine. This product is intended for research and analytical applications. L-Arginine ((S)-(+)-Arginine) is the substrate for the endothelial nitric oxide synthase (eNOS) to generate NO. L-Arginine is transported into vascular smooth muscle cells by the cationic amino acid transporter family of proteins where it is metabolized to nitric oxide (NO), polyamines, or L-proline. L-Arginine is a potent vasodilator, and can be used to induce experimental acute pancreatitis.
    L-Arginine (Standard)
  • HY-P1181A
    Pam2CSK4 TFA
    		Activator 99.46%
    Pam2CSK4 TFA is a TLR2 agonist. Pam2CSK4 TFA induces the expression of iNOS and NO in macrophage cell lines via TBK1 and MyD88 molecules. Pam2CSK4 TFA activates the NF-κB and Bruton's tyrosine kinase signaling pathways in platelets, and promotes platelet-endothelial cell interactions. TLR2 activation triggered by Pam2CSK4 TFA expands myeloid-derived suppressor cells (MDSCs) and suppresses anti-tumor immune responses in the tumor microenvironment. Pam2CSK4 TFA acts as a Th2-polarizing adjuvant in mouse vaccine models against Leishmania major and Brugia malayi. Pam2CSK4 TFA can be used in the research of various diseases, including thromboinflammatory diseases, sepsis, atherosclerosis, heart failure, influenza, lymphoma, melanoma, cutaneous leishmaniasis and lymphatic filariasis.
    Pam2CSK4 TFA
  • HY-W008646
    7,8-Dihydro-L-biopterin
    		Inhibitor 99.79%
    7,8-Dihydro-L-biopterin is a NOS uncoupling inducer with blood-brain barrier permeability, and it is a reduced non-conjugated pteridine. 7,8-Dihydro-L-biopterin is the main metabolite of 4-amino-tetrahydro-L-biopterin, and it undergoes photooxidation to form biopterin. 7,8-Dihydro-L-biopterin promotes the conversion of nitric oxide synthase to a superoxide-producing form, thereby increasing oxidative stress levels in the renal outer medulla and inducing apoptosis. 7,8-Dihydro-L-biopterin is sensitive to the inhibitory effect of SOD, and it can be applied to research related to salt-sensitive hypertension, moderate to severe traumatic brain injury, and neurodegenerative diseases.
    7,8-Dihydro-L-biopterin
  • HY-W016409
    Ethyl 3,4-dihydroxybenzoate
    		Activator 99.96%
    Ethyl 3,4-dihydroxybenzoate (Protocatechuic acid ethyl ester) is an orally effective, blood-brain barrier-permeable, competitive prolyl hydroxylase (PHD) inhibitor that inhibits the hydroxylation modification of hypoxia-inducible factor (HIF) by PHD. Ethyl 3,4-dihydroxybenzoate stabilizes HIF-1α by inhibiting PHD, activates downstream pathways to induce autophagy and apoptosis of tumor cells, and regulates inflammatory responses, inhibits the NF-κB pathway, improves vascular permeability, and promotes osteoblast differentiation. Ethyl 3,4-dihydroxybenzoate has anti-tumor, anti-hypoxic injury, and bone metabolism regulation effects. It can also be used in the research of cardiovascular protection (such as reducing myocardial ischemic damage), bone tissue engineering (promoting osteogenesis/inhibiting osteoclast differentiation), and prevention and treatment of high-altitude cerebral edema.
    Ethyl 3,4-dihydroxybenzoate
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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