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novobiocin/necrosis
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9 resultados
Modulation by novobiocin of sister-chromatid exchanges induced by tumor necrosis factor in human lymphocytes.
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The effect of the antibiotic novobiocin on human recombinant tumor necrosis factor (TNF)-induced sister-chromatid exchanges (SCEs) were examined in human peripheral blood lymphocytes. TNF, when introduced in a dose range of 10-1000 U/ml at the initiation of culture, was found to cause a significant
Immunomodulating properties of the antibiotic novobiocin in human monocytes.
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We show that the coumeromycin antibiotic novobiocin, a potent inhibitor of ADP ribosylation, prevents lipopolysaccharide (LPS)-induced tumor necrosis factor alpha (TNF-alpha), interleukin-1 (IL-1), IL-6, and IL-10 secretion in human peripheral blood mononuclear cells. It shares these
Targeted inhibition of heat shock protein 90 suppresses tumor necrosis factor-α and ameliorates murine intestinal inflammation.
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Inflammatory bowel diseases are chronic intestinal inflammatory diseases thought to reflect a dysregulated immune response. Although antibody-based inhibition of tumor necrosis factor-α (TNF-α) has provided relief to many inflammatory bowel diseases patients, these therapies are either ineffective
Antitumor activity of nanoliposomes encapsulating the novobiocin analog 6BrCaQ in a triple-negative breast cancer model in mice.
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In this study, we investigated the anticancer efficacy of pegylated liposomes containing 6BrCaQ, an hsp90 inhibitor derived from novobiocin. 6BrCaQ has been previously identified as the most potent compound in a series of quinoleic novobiocin analogs but is poorly water-soluble. We investigated, for
Synergistic interactions between tumor necrosis factor and inhibitors of DNA topoisomerase I and II.
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TNF is a pleiotropic cytokine that mediates diverse cellular responses, including cytotoxicity, cytostasis, proliferation, differentiation, and the expression of specific genes. Many of these processes require the activity of DNA topoisomerases I and II. We have investigated the interactions of TNF
Inhibitors of topoisomerase II prevent cytokine-induced expression of vascular cell adhesion molecule-1, while augmenting the expression of endothelial leukocyte adhesion molecule-1 on human umbilical vein endothelial cells.
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Cytokine stimulation of human umbilical vein endothelial cells (HUVE) induces surface expression of the adhesion molecules vascular cell adhesion molecule-1 (VCAM-1), intercellular adhesion molecule-1 (ICAM-1), and endothelial leukocyte adhesion molecule-1 (E-selectin). We previously found that
Cisplatin at clinically relevant concentrations enhances interleukin-2 synthesis by human primary blood lymphocytes.
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Cytotoxic drugs influence the expression of certain genes in cancer cells. Cisplatin has recently been shown to modulate interleukin (IL)-1 and tumor necrosis factor (TNF)-alpha production in macrophages. In this study, we wanted to investigate whether cisplatin interferes with the IL-2, IL-2
Aminocoumarins inhibit osteoclast differentiation and bone resorption via downregulation of nuclear factor of activated T cells c1.
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Aminocoumarins, such as coumermycin A1 and novobiocin, are natural products of streptomycetes. They are potent inhibitors of bacterial DNA gyrase and are used to suppress the growth of bacteria in inflammatory diseases. However, their effect in osteoclastogenesis has not been investigated. In this
A simple method for accurate estimation of apoptotic cells.
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A simple, sensitive, and reliable "DNA diffusion" assay for the quantification of apoptosis is described. Human lymphocytes and human lymphoblastoid cells, MOLT-4, were exposed to 0, 12.5, 25, 50, or 100 rad of X-rays. After 24 h of incubation, cells were mixed with agarose, microgels were made, and
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