isoquinoline/nekroza

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Substituted isoquinolines and quinazolines as potential antiinflammatory agents. Synthesis and biological evaluation of inhibitors of tumor necrosis factor alpha.

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A series of isoquinolin-1-ones and quinazolin-4-ones and related derivatives were prepared and evaluated for their ability to inhibit tumor necrosis factor alpha (TNFalpha) production in human peripheral blood monocytes stimulated with bacterial lipopolysaccharide (LPS). In an effort to optimize the

Dopaminergic neurotoxins, 6,7-dihydroxy-1-(3', 4'-dihydroxybenzyl)-isoquinolines, cause different types of cell death in SH-SY5Y cells: apoptosis was induced by oxidized papaverolines and necrosis by reduced tetrahydropapaverolines.

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Dopamine-derived 6,7-dihydroxy-1-(3', 4'-dihydroxybenzyl)-isoquinolines, papaverolines and tetrahydropapaverolines, have been proposed to be neurotoxin candidates related to the pathogenesis of Parkinson's disease. In this paper, the cytotoxicity of papaverolines and their N-methyl derivatives was

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

Resolution of liver fibrosis by isoquinoline alkaloid berberine in CCl₄-intoxicated mice is mediated by suppression of oxidative stress and upregulation of MMP-2 expression.

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Liver fibrosis is the result of chronic liver injury, and it represents a widespread medical problem. The aim of this study is to investigate the antifibrotic activity of isoquinoline alkaloid berberine in carbon tetrachloride (CCl₄)-induced damage in mice. Hepatic fibrosis was induced by

Differential regulation of interleukin-6 expression in human fibroblasts by tumor necrosis factor-alpha and lymphotoxin.

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The treatment of human diploid fibroblasts with tumor necrosis factor (TNF)-alpha and with lymphotoxin (LT) is associated with induction of interleukin-6 (IL-6) transcripts with TNF-alpha being 10-fold more potent than LT. Here we report on the TNF-alpha/LT-induced signaling mechanisms responsible

A novel isoquinoline derivative exhibits anti-inflammatory properties and improves the outcomes of endotoxemia.

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Sepsis initiates an inflammatory response that causes widespread injury, and candidates for related myocardial depressant factors include cytokines and nitric oxide (NO). Nuclear factor kappa-B (NF-KB) stimulated by toll-like receptor 4 activation in sepsis mediates the transcription

A novel isoquinoline derivative exhibits anti-inflammatory properties and improves the outcomes of endotoxemia.

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Sepsis initiates an inflammatory response that causes widespread injury, and candidates for related myocardial depressant factors include cytokines and nitric oxide (NO). Nuclear factor kappa-B (NF-κB) stimulated by toll-like receptor 4 activation in sepsis mediates the transcription

Regulation of gene expression of macrophage-colony stimulating factor in human fibroblasts by the acute phase response mediators interleukin (IL)-1 beta, tumor necrosis factor-alpha and IL-6.

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Fibroblasts constitute a major element of the bone marrow stroma. They play a pivotal role in blood cell development by providing the scaffolding required for cellular organization and tissue cohesion and by producing soluble molecules including colony stimulating factors (CSFs) and various

Inhibition of tumor necrosis factor-alpha induced neutrophil apoptosis by cyclic AMP: involvement of caspase cascade.

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Treatment of neutrophils with tumor necrosis factor-alpha (TNF-alpha) in the presence of cycloheximide induced apoptosis within 3 h, as evaluated by the occurrence of morphological nuclear changes characteristic of apoptosis. Pretreatment of neutrophils with dibutyryl cyclic AMP (dbcAMP) suppressed

Oxidation of N-methyl(R)salsolinol: involvement to neurotoxicity and neuroprotection by endogenous catechol isoquinolines.

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1(R), 2(N)-Dimethyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline, N-methyl(R)salsolinol, is a potent dopaminergic neurotoxin to induce parkinsonism in rats. The cytotoxicity of N-methyl(R)salsolinol proved to be ascribed to its oxidation into cytotoxic 1,2-dimethyl-6,7-dihydroxyisoquinolinium ion

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

Positive and negative regulation of a tumor necrosis factor response in melanoma cells.

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Tumor necrosis factor (TNF) elicits a wide variety of responses in target cells by binding to cell surface receptors, but the signal transduced from these receptors in unclear. We examined the role of two different second messenger systems in the regulation of plasminogen activator inhibitor, type 2

Role of tyrosyl phosphorylation in neutrophil priming by tumor necrosis factor-alpha and granulocyte colony stimulating factor.

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The ability of human tumor necrosis factor-alpha (TNF-alpha) and human granulocyte colony stimulating factor (G-CSF) to induce phosphorylation of protein tyrosyl residues in human peripheral neutrophils (PMN) was investigated by Western blot analysis with antiphosphotyrosine antibody. Both TNF-alpha

Berberine-antiproliferative activity in vitro and induction of apoptosis/necrosis of the U937 and B16 cells.

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Berberine, an isoquinoline plant alkaloid, is widely distributed in plants used in the traditional Chinese medicine. It displays a wide range of biological activities and the mechanism of action. Our previous studies of the anticancer activity of berberine against the cancer cell lines HeLa and

Effects of sphingosine, isoquinoline and tannic acid on the human tape-stripping model and the psoriatic lesion.

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Published data (mainly from rodent skin) suggest a correlation between compounds which inhibit protein kinase C (PKC), have anti-inflammatory or antitumor characteristics and possess antipsoriatic potential. We have investigated the effects of topical application of sphingosine (a naturally

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