nitric oxide

Penicillamine (Artamine), possessing antineoplastic properties, induces apoptosis by a p53-mediated mechanism and inhibits angiogenesis by chelating with copper, a cofactor for angiogenesis. Artamine is a beta dimethyl analog of the amino acid cysteine. As a degradation product of penicillin antibiotics, Artamine chelates with heavy metals and increases their urinary excretion.

4-Hydroxyflavanone is a natural product, shows full vasorelaxing effects

Pelargonidin chloride shows protective effect against CTN-induced oxidative stress in HepG2 cells and up-regulated the activity of detoxification enzyme levels through Keap1/Nrf2 signaling pathway.

Kuwanon A inhibits nitric oxide production (IC50: 10.5 μM). Kuwanon A is a flavone derivative isolated from Morus alba L.

Moracin C, a natural compound found in Morus mesozygia, Morus alba var. multicaulis, is an anti-inflammatory agent. moracin C inhibits nitric oxide (NO) release and LPS-activated reactive oxygen species (ROS) in cells.

L-Arginine hydrochloride serve as substrates and nitrogen donors for endothelial nitric oxide synthase (eNOS) to produce nitric oxide (NO). They are transported into vascular smooth muscle cells via cationic amino acid transporters, where they are metabolized into NO, polyamines, or L-proline. As effective vasodilators, they are commonly used to induce experimental acute pancreatitis models.

Ginsenoside C-K (Ginsenoside K) is a bacterial metabolite of G-Rb1 exhibiting anti-inflammatory effects by reducing iNOS and COX-2.

L-Arginine (L-Arg) is a substrate of endothelial nitric oxide synthase (eNOS). L-Arginine is transported to vascular smooth muscle cells via a family of cationic amino acid transporters and is metabolized to nitric oxide, polyamines, or L-proline. L-Arginine is a potent vasodilator and can be used to induce experimental acute pancreatitis.

1. Methyl eugenol (4-allylveratrole) is a natural constituent of the essential oils of a number of plants widely used in foodstuffs as flavouring agents, in view of the carcinogenic potential of ME, the need to check its presence in food products with effective analytical methods. 2. Methyleugenol has insecticidal properties. 3. Methyleugenol can inhibit the production of nitric oxide and decreased the protein expression of inducible nitric oxide synthase, it down-regulates the production of pro-inflammatory cytokines in the ischemic brain as well as in immunostimulated mixed glial cells; indicates that methyleugenol could be useful for the treatment of ischemia/inflammation-related diseases. 4. Methyleugenol has cytotoxicity and genotoxicity. 5. Intravenous (i.v.) treatment with methyleugenol (ME) in either anesthetized or conscious rats elicits hypotension, an effect that seems related to an active vascular relaxation rather than withdrawal of sympathetic tone. 6. Methyleugenol has antinociceptive effect on the second phase of formalin-induced pain, may be due to the inhibition of N-methyl-d-aspartic acid (NMDA) receptor-mediated hyperalgesia via GABA(A) receptors. 7. Methyleugenol has elaxant and antispasmodic actions on guinea-pig isolated ileum.

Agmatine sulfate (Agmatine sulfate salt) is a bioactive metabolite of the arginine amino acid. It exerts modulatory action at multiple molecular targets, such as neurotransmitter systems, ion channels and nitric oxide synthesis. It is an endogenous agonist at imidazoline receptor and a NO synthase inhibitor.

3-Nitro-L-tyrosine (3-Nitrotyrosine) is the major product from the spontaneous reaction of peroxynitrite with tyrosine. Formation of nitrotyrosine can indicate the formation of peroxynitrite by a nitric oxide (NO)-dependent oxidative damage.

Ethyl 3,4-dihydroxybenzoate (EDHB): a prolyl hydroxylase inhibitor attenuates acute hypobaric hypoxia mediated vascular leakage in brain.

1. Isoquercetin (3-Glucosylquercetin) is a potential stimulator of bone mineralization used for prophylaxis of osteoporotic disorders. 2. Isoquercetin may be as a potential therapeutic agent against neurodegeneration in Parkinson's disease. 3. Isoquercetin is an inhibitor of Wnt/β-catenin and may be as a potential novel anti-tumoral agent, such as against human pancreati,liver cancer related to opioid receptors and to the activation of the mitogen-activated protein kinase (MAPK) signalling pathway. .

Broussochalcone A is a natural antioxidant and xanthine oxidase inhibitor (IC50 = 2.21 μM) that scavenges free radicals, inhibits iron-induced lipid peroxidation, and reduces nitric oxide synthesis in LPS-activated macrophages. Broussochalcone A induces apoptosis in human renal carcinoma cells by increasing ROS levels and activating the FOXO3 signaling pathway. Broussochalcone A is also a novel NR4A1 inhibitor that induces apoptosis in pancreatic cancer cells through NR4A1-dependent pathways.

Anhydronotoptol (4-{[(2E,5E)-3,7-dimethylocta-2,5,7-trien-1-yl]oxy}-7H-furo[3,2-g]chromen-7-one), a natural compound extracted from the umbelliferae plant Qiangwu, is a potent inhibitor of nitric oxide production, inhibiting LPS-induced NO production in RAW 264.7 cells with an IC50 value of 36.6 μM.

11-Oxomogroside IIa is a cucurbitane glycoside extracted from the fruits of Siraitia grosVenorii. It has inhibitory effects against the EBV-EA activation induced by TPA, shows weak inhibitory effects on activation of NOR 1, a nitric oxide (NO) donor.

Gordonoside J, a compound isolated from the stem of Chrysanthemum officinale, inhibits LPS-induced nitric oxide production in rat polymorphonuclear leukocytes (PMNS).

Gordonoside I, a compound isolated from the stem of Chrysanthemum officinale, strongly inhibited the production of nitric oxide in LPS-activated macrophages with an IC50 value of 0.14 μM.

Ergolide, a sesquiterpene lactone extracted from the dried flowers of Inula Britannica, effectively hinders the expression of inducible nitric oxide synthase and cyclo-oxygenase-2 in RAW 264.7 macrophages by deactivating NF-κB.

Salirepin is a phenolic glycoside isolated from fruits of Idesia polycarpa, Salirepin inhibits LPS-induced nitric oxide production.

Tetrahydrobiopterin (BH4) is a cofactor for aromatic amino acid hydroxylases and an essential cofactor for nitric oxide synthase (NOS), which is used in the study of endothelial dysfunction such as hypertension, hypercholesterolemia, and diabetes.

Echinacoside is a natural polyphenolic compound with various kinds of pharmacological activities, such as anti-inflammatory, antioxidative, hepatoprotective, neuroprotective, nitric oxide radical-scavenging and vasodilative ones.

Kazinol B is an inhibitor of nitric oxide (NO) production, an isopentenylated flavan with a dimethylpyran ring.Kazinol B improves insulin sensitivity by activating the insulin-Akt signalling pathway and AMPK, which enhances glucose uptake.Kazinol B stimulates gene expression and secretion of adiponectin and can be used to study diabetes.

Yakuchinone A (Yakuchinone-A) is a natural product isolated from Alpinia oxyphylla Miquel. Yakuchinone-A has strong inhibitory effects on the synthesis of prostaglandins and leukotrienes in vitro. Yakuchinone A inhibits the expression of cyclooxygenase-2 and of inducible nitric oxide synthase (iNOS).