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Pagina 1 a partire dal 569 risultati
Tetrandrine, a plant alkaloid, inhibits the production of tumour necrosis factor-alpha (cachectin) hy human monocytes.
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Human mononuclear leucocytes (MNL) or the adherent fraction (monocytes) produced tumour necrosis factor-alpha (TNF-alpha) (by ELISA) in culture when stimulated with killed Staphylococcus aureus. The bisbenzylisoquinoline alkaloid, tetrandrine inhibited the capacity of MNL and monocytes to produce
Inhibitory effects of bisbenzylisoquinoline alkaloids on induction of proinflammatory cytokines, interleukin-1 and tumor necrosis factor-alpha.
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Bisbenzylisoquinoline alkaloids are known to affect immune responses as well as inflammatory responses, and have been used for the treatment of inflammatory symptoms in China. This study is aimed at elucidating the inhibitory effects of two alkaloids, fangchinoline and isotetrandrine, on the
Dietary ergot alkaloids as a possible cause of tail necrosis in rabbits.
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This study describes the association between tail necrosis in rabbits and mycotoxins in rabbit feed. Clinical cases of tail necrosis were observed in 14 out of 103 rabbits kept in an outdoor group housing, fed with hay and a commercial pelleted feed. The observed clinical symptoms, alopecia,
Irniine, a pyrrolidine alkaloid, isolated from Arisarum vulgare can induce apoptosis and/or necrosis in rat hepatocyte cultures.
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The effects of irniine, a pyrrolidine alkaloid extracted from the tubers of Arisarum vulgare, on rat hepatocyte primary cultures and rat liver epithelial cell line (RLEC) were studied. Cytotoxicity was first evaluated by LDH release, MTT and NR tests and MDA production, while cellular alterations
Anti-hepatitis B virus effect of matrine-type alkaloid and involvement of p38 mitogen-activated protein kinase and tumor necrosis factor receptor-associated factor 6.
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The matrine-type alkaloid, oxymatrine inhibits hepatitis B virus (HBV) replication but very little is known about these effects in other matrine-type alkaloids, including sophoridine and sophocarpine. Therefore, we compared the in vitro anti-HBV effects of matrine, oxymatrine, sophocarpine, and
Suppression of lipopolysaccharide-induced fulminant hepatitis and tumor necrosis factor production by bisbenzylisoquinoline alkaloids in bacillus Calmette-Guerin-treated mice.
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The bisbenzylisoquinoline (BBI) alkaloids chondocurine, cycleanine, tetrandrine and berbamine were tested for their capacity to suppress hepatic injury and production of tumor necrosis factor (TNF) induced by lipopolysaccharide (LPS) in mice primed with bacillus Calmette-Guerin (BCG). When
Suppression of tumor necrosis factor-alpha and inducible nitric oxide synthase gene expression by THI 52, a new synthetic naphthyl-benzylisoquinoline alkaloid.
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The effects of THI 52 (1-naphthylethyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline) on (a) inducible nitric oxide synthase (iNOS) and tumor necrosis factor-alpha (TNF-alpha) expression in RAW 264.7 cells stimulated by lipopolysaccharide (LPS)/interferon gamma (IFN-gamma), (b) plasma nitrate
Preventive effects of a biscoclaurine alkaloid, cepharanthine, on endotoxin or tumor necrosis factor-alpha-induced septic shock symptoms: involvement of from cell death in L929 cells and nitric oxide production in raw 264.7 cells.
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The preventive effects of cepharanthine, a biscoclaurine alkaloid isolated from Stephania cepharantha Hayata, on the lethality and cell death caused by endotoxin or tumor necrosis factor (TNF)-alpha-induced syndrome in septic shock were investigated. In these experiments, we estimated the survival
Inhibition of cell growth and potentiation of tumor necrosis factor-α (TNF-α)-induced apoptosis by a phenanthroindolizidine alkaloid antofine in human colon cancer cells.
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Based on the potential of natural products as a source for the development of cancer chemotherapeutic agents, this study was performed to investigate the anti-proliferative and antitumor effects of antofine, a phenanthroindolizidine alkaloid derived from Cynanchum paniculatum. Antofine showed potent
Inhibitory effects of herbal alkaloids on the tumor necrosis factor-α and nitric oxide production in lipopolysaccharide-stimulated RAW264 macrophages.
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It is beneficial to treat chronic inflammatory condition in patients through diets that inhibit the production of proinflammatory cytokines and mediators such as tumor necrosis factor-α (TNF-α) and nitric oxide (NO). Since less attention has been paid to alkaloids in the diets than to polyphenols in
A novel structural derivative of natural alkaloid ellipticine, MDPSQ, induces necrosis in leukemic cells.
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DNA intercalating molecules are promising chemotherapeutic agents. In the present study, a novel DNA intercalating compound of pyrimido[4',5':4,5]selenolo(2,3-b)quinoline series having 8-methyl-4-(3 diethylaminopropylamino) side chain is studied for its chemotherapeutic properties. Our results
Biochemical basis of liver necrosis caused by pyrrolizidine alkaloids and certain other hepatotoxins.
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Anti-inflammatory, Anti-bacterial and Anti-acetylcholinesterase Activities of two Isoquinoline Alkaloids-Scoulerine and Cheilanthifoline.
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Corydalis plants containing isoquinoline alkaloids are reported to possess promising phamacological properties for the treatment of important diseases including cancer, inflammation, Alzheimer's disease and microbial infections. As part of a wider program investigating Bhutanese medicinal plants,.we
Lesions of potato sprout and extracted potato sprout alkaloid toxicity in Syrian hamsters.
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Hamsters were gavaged either dried potato sprout material, alkaloid extract of potato sprouts, or the marc from which the alkaloid fraction was extracted and then were examined for gross and microscopic lesions. Nine of 10 hamsters receiving dried potato sprout material and 3 of 5 hamsters receiving
Disenecioyl dehydroretronecine--synthesis and acute hepatic toxicity of a pyrrolizidine alkaloid pyrrole analog.
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Disenecioyl dehydroretronecine (DSDR), a semi-synthetic analog of the highly reactive pyrrole metabolites of the pyrrolizidine alkaloids, has been synthesized from disenecioyl retronecine. Rats which received 40 mg DSDR/kg body weight via the mesenteric vein showed multiple depressed areas (less
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