nitrite

NOS-IN-1 (2-Imino-4-methylpiperidine acetate) is a potent and orally active inhibitor of NO synthase (NOS) isoforms. NOS-IN-1 exhibits IC50s of 0.1 μM, 0.2 μM, and 1.1μM for human iNOS (hiNOS), hnNOS and heNOS, respectively.

Tetrabutylammonium (nitrite) is a compound with antibacterial properties. It exhibits inhibitory activity against certain Gram-negative and Gram-positive bacteria.

Silver nitrite, with the chemical formula AgNO2, is an inorganic compound. It can inhibit cell division and bacterial growth by interfering with protein synthesis.

Sodium Nitrite (Nitrous acid, sodium salt) is a compound that is not easy to store and will oxidize to nitric acid if left in the air.Sodium Nitrite has a variety of functions, both oxidizing and reducing, and is very versatile.

Sodium Nitrite (Standard) is the standard substance of Sodium Nitrite, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Sodium Nitrite (Nitrous acid, sodium salt) is a compound that is not easy to store and will oxidize to nitric acid if left in the air.Sodium Nitrite has a variety of functions, both oxidizing and reducing, and is very versatile.

Uric acid is an important antioxidant that scavenges oxygen radicals and reactive oxygen species (such as singlet oxygen and peroxynitrite), inhibits lipid peroxidation, helps maintain stable blood pressure, and is the final product of purine metabolism. It is commonly used to induce hypertension models.

Nitrosoglutathione (GSNO) is an endogenous transnitrosation donor involved in S-nitrosation of a variety of cellular proteins. GSNO, an exogenous NO donor and substrate of rat alcohol dehydrogenase class III isoenzyme, inhibits cerebral angiotensin II-dependent and -independent AT1 receptor responses.

GKT136901 (AK120765) is an inhibitor of NOX1/4.It acts as Selective and Direct Scavenger of Peroxynitrite

Tinidazole (CP12574)a is a 5-nitroimidazole derivative with the antiprotozoal property. Although the mechanism of action has not been fully elucidated, it has been suggested that tinidazole is metabolized and yields nitrite anions and metronidazole. Metronidazole's nitro group, in turn, is reduced via the parasite ferredoxin, thereby generating a series of free nitro radicals including nitro anions. Toxicity is achieved via depletion of sulfhydryl groups and DNA strand breaks with multiple hits having an additive effect and ultimately leading to cell death.

Acrylamide monomer is the primary precursor for polyacrylamide production, undergoing aerobic soil hydrolysis to ammonium ions with subsequent oxidation to nitrite/nitrate ions.

9(10)-Nitrooleate, a mixture of endogenous lipid signaling molecules composed of 9-nitrooleic acid and 10-nitrooleic acid, is synthesized through nitration of oleic acid in the presence of peroxynitrite, nitrous acid, and myeloperoxidase with hydrogen peroxide (H2O2) and nitrite as auxiliary reagents.

Caspase-3-IN-3 (compound 7) is a caspase 3 inhibitor. It enhances cellular ATP levels, inhibits caspase-3 activity, reduces nitrite production, suppresses cytokine-induced apoptosis, and restores glucose-stimulated insulin secretion.

12-Nitrolinoleate is a linoleic acid derivative that acts as an agonist of peroxisome proliferator-activated receptor γ (PPARγ). Formed via exposure to acidified nitrite, it is present in human red blood cells and plasma. This compound stimulates PPARγ-dependent gene expression, demonstrated in a reporter assay with MCF-7 cells expressing human PPARγ, with an EC50 of 0.045 µM. At 2.5 µM, 12-Nitrolinoleate reduces the secretion of IL-6, TNF-α, and chemokine (C-C motif) ligand 2 (CCL2) in THP-1 and RAW 264.7 macrophages, and it suppresses LPS-induced NF-κB transcriptional activity in RAW 264.7 macrophages. Additionally, it inhibits TNF-α-induced increases in vascular cell adhesion molecule-1 (VCAM-1) in human umbilical vein endothelial cells (HUVECs) and enhances heme oxygenase-1 (HO-1) levels in primary human aortic endothelial cells at concentrations of 1, 5, or 10 µM.

N-Nitrosometoprolol is an N-nitroso derivative formed through the in vitro reaction of a β-adrenergic blocker with sodium nitrite. It has the capability to induce micronuclei in the liver, bone marrow, and spleen of rats.

RG-239 is an orally active TGR5 agonist with an EC50 of 120 nM, significantly more potent than Betulinic acid (EC50= 1.04 μM). It exhibits much higher selectivity for TGR5 over FXRα. The compound enhances mitochondrial activity in adipocytes and promotes neurite outgrowth at higher concentrations. Additionally, RG-239 inhibits LPS-induced iNOS expression and nitrite production in Raw264.7 cells and microglia. RG-239 is applicable for research related to type 2 diabetes.

Guanidino ethyl disulfide (GED) (Compound 23) is an inhibitor of nitric oxide synthase (NOS), exhibiting EC50 values of 110 μM, 630 μM, and 180 μM for iNOS, ecNOS, and bNOS, respectively. It effectively suppresses nitrite production in J774.2 macrophages and is applicable in research on circulatory shock, inflammation, and neurological disorders.

(±)19(20)-EDP ethanolamide is an ω-3 endocannabinoid epoxide and cannabinoid (CB) receptor agonist (EC50s = 108 and 280 nM for CB1 and CB2, respectively). It is produced through direct epoxygenation of docosahexaenoyl ethanolamide by cytochrome P450 (CYP) epoxygenases. (±)19(20)-EDP ethanolamide (25 μM) reduces the viability of 143B metastatic osteosarcoma cells. It decreases the production of IL-6 and increases the production of IL-10 when used at concentrations ranging from 2.5 to 10 μM in BV-2 microglia stimulated by LPS and decreases LPS-induced cytotoxicity when used at concentrations ranging from 5 to 10 μM. It also decreases nitrite production when used at a concentration of 7.5 μM, an effect that can be partially reversed by the CB2 receptor antagonist AM630 and the PPARγ antagonist GW 9662 . (±)19(20)-EDP ethanolamide induces vasodilation of isolated preconstricted bovine coronary arteries (ED50 = 1.9 μM) and reduces tube formation by human microvascular endothelial cells (HMVECs) in a Matrigel assay.

Nitrated unsaturated fatty acids, such as 10- and 12-nitrolinoleate , cholesteryl nitrolinoleate, and nitrohydroxylinoleate, represent a new class of endogenous lipid-derived signalling molecules. LNO2 isomers serve as potent endogenous ligands for PPARγ and can also decompose or be metabolized to release nitric oxide. 9-Nitrooleate is one of two regioisomers of nitrooleate, the other being 10-nitrooleate (OA-NO2; used for the mixture of isomers), which are formed by nitration of oleic acid in approximately equal proportions in vivo. Peroxynitrite, acidified nitrite, and myeloperoxidase in the presence of H2O2 and nitrite, all mediate the nitration of oleic acid. OA-NO2 is found in human plasma as the free acid and esterified in phospholipids at concentrations of 619 ± 52 nM and 302 ± 369 nM, respectively. OA-NO2 activates PPARγ approximately 7-fold at a concentration of 1 μM and effectively promotes differentiation 3T3-L1 preadipocytes to adipocytes at 3 μM.

9(E),11(E)-12-nitro Conjugated linoleic acid (9(E),11(E)-12-nitro CLA) is a nitrated fatty acid. It is formed from 9(Z),11(E)-CLA upon exposure to acidified nitrite, peroxynitrite, gaseous nitrogen dioxide, or a combination of myeloperoxidase, hydrogen peroxide, and nitrite.1It is also formed in LPS-stimulated RAW 264.7 macrophages, an effect that can be reduced by the nitric oxide synthase (NOS) inhibitor L-NAME .29(E),11(E)-12-nitro CLA has been found in human plasma. 1.Woodcock, S.R., Salvatore, S.R., Bonacci, G., et al.Biomimetic nitration of conjugated linoleic acid: Formation and characterization of naturally occurring conjugated nitrodienesJ. Org. Chem.79(1)25-33(2014) 2.Bonacci, G., Baker, P.R.S., Salvatore, S.R., et al.Conjugated linoleic acid is a preferential substrate for fatty acid nitrationJ. Biol. Chem.287(53)44071-44082(2012)

10-Nitrolinoleate is the product of nitration of linoleate by NO-derived reactive species. Other nitrolinoleates detected in human plasma and urine include 9-, 12-, and 13-nitrolinoleate. Nitrolinoleates activate peroxisome proliferator-activated receptor γ (PPARγ; Ki = 133 nM), inducing CD36 expression in macrophages, adipocyte differentiation, and glucose uptake. Nitrolinoleates can also be metabolized by smooth muscle cells to produce nitrite derivatives which in turn form NO, leading to increased cGMP production and smooth muscle relaxation. Through the same mechanism, nitrolinoleate-derived NO suppresses leukocyte adhesion, in part through nitrosation of CD40. Alteratively, nitrolinoleates can act independently of NO/cGMP and PPARγ signaling to suppress neutrophil and macrophage functions.

3-Aminobenzotrifluoride is a trifluoromethyl-substituted aniline derivative that undergoes azidation with sodium nitrite and exhibits cytotoxicity toward HEK293 cells.

1. Apiin (Apioside) is the reducing and stabilizing agent. 2. Apiin has inhibitory activity in-vitro on iNOS expression and nitrite production when added before LPS stimulation in the medium of J774.A1 cells.

(±)-γ-Tocopherol is a form of vitamin E with antioxidant and anti-inflammatory properties. It traps and detoxifies reactive nitrogen oxide species, including nitrogen dioxide, in cell-free assays. It also reduces the synthesis of prostaglandin E2 (PGE2) induced by LPS in RAW 264.7 macrophages and by IL-1β in A549 cells. (±)-γ-Tocopherol inhibits LPS-induced nitrite release and inducible nitric oxide synthase (iNOS) expression in RAW 264.7 cells and reduces COX-2 activity in A549 cells pretreated with IL-1β. Serum levels of (±)-γ-tocopherol are decreased in patients with cardiovascular disease.

Pap12-6, an antibacterial peptide originating from the first twelve N-terminal amino acids of papiliocin found in P. xuthus larvae, exhibits activity against a range of eight Gram-negative bacteria (e.g., E. coli, P. aeruginosa, S. syphimurium with MIC50s=4-8 µM) and Gram-positive bacteria (e.g., S. aureus, methicillin-resistant S. aureus 3126, B. subtilis, and S. epidermidis with MIC50s=4-8 µM), without compromising the viability of human erythrocytes, mouse RAW 264.7 macrophages, human HaCaT keratinocytes, or human HEK293 kidney cells at 25 µM. It causes membrane depolarization in E. coli at 4 and 8 µM and, upon preincubation at 10 µM, decreases nitrite (NO2-), Tnf-α, and Il-6 secretion in LPS-stimulated RAW 264.7 macrophages. In a murine model, Pap12-6 enhances survival rates and diminishes colony forming units (CFUs) in several organs upon E. coli infection at 10 mg/kg and 1 mg/kg doses, respectively. Additionally, at a 1 mg/kg dose, it lowers serum aspartate aminotransferase (AST) and alanine transaminase (ALT) levels, as well as blood urea nitrogen levels in E. coli-induced sepsis, indicating its therapeutic potential for bacterial infections without affecting host cell viability.