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Page 1 od 847 rezultati
Histamine and tumor necrosis factor-alpha production from purified rat brain mast cells mediated by substance P.
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The effect of cytokines and neuropeptides on neuroimmune functions has not been completely elucidated and recent evidence suggests an important role for these molecules linking the neuroimmune system and inflammatory events. The aim of this study was to analyse the effect of substance P (SP) on a
Histamine protects against NMDA-induced necrosis in cultured cortical neurons through H receptor/cyclic AMP/protein kinase A and H receptor/GABA release pathways.
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Using histamine and the H3 receptor antagonist thioperamide, the roles of histamine receptors in NMDA-induced necrosis were investigated in rat cultured cortical neurons. Within 3 h of intense NMDA insult, most neurons died by necrosis. Histamine reversed the neurotoxicity in a
Murine tumor necrosis factor-alpha sensitizes plasma corticosterone activity and the manifestation of shock: modulation by histamine.
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Murine tumor necrosis factor-alpha (mTNF-alpha) results in the sensitization of mechanisms underlying plasma corticosterone activity and sickness behavior, the latter being reminiscent of septic or anaphylactic shock. The mTNF-alpha induced a sensitization of sickness and corticosterone in mice that
Stem cell factor potentiates histamine secretion by multiple mechanisms, but does not affect tumour necrosis factor-alpha release from rat mast cells.
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The effect of stem cell factor (SCF) on histamine and tumour necrosis factor-alpha (TNF-alpha) release from rat peritoneal mast cells (PMC) was determined and the intracellular pathways involved in the potentiation of histamine secretion were investigated. The effects of SCF (2-100 ng/ml) were
Evidence for the contribution of tumour necrosis factor in oedema formation induced by histamine in the hind paw of the rat.
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There is mounting evidence that tumour necrosis factor (TNF) is involved in the early phase of inflammatory response, but its relation to histamine action is unclear. In this study we examined the effect of drugs interfering with TNF expression (thalidomide) and activity (infliximab) and compared it
Tumour necrosis factor stimulates human skin mast cells to release histamine and tryptase.
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Besides its effects on tumour cells, tumour necrosis factor (TNF) also acts on a variety of other cells, thus enhancing inflammatory and immune processes. In view of the prominent role of the mast cell in such processes, the aim of the present study was to assess the effects of recombinant TNF-alpha
Histamine and cis-urocanic acid augment tumor necrosis factor-alpha mediated induction of keratinocyte intercellular adhesion molecule-1 expression.
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Early cellular and molecular events in inflamed skin include the active participation of epidermal keratinocytes (KCs) and dermal mast cells which can produce diffusible mediators such as tumor necrosis factor-alpha (TNF-alpha), histamine, and urocanic acid (UCA). Rapid induction of adhesion
Effect of histamine on tumor necrosis factor production by human monocytes.
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This study was aimed at evaluating the effect of histamine on tumor necrosis factor (TNF alpha) secretion by purified human blood monocytes. TNF alpha was measured by radioimmunoassay. Histamine caused a dose-dependent inhibition of lipopolysaccharide-induced TNF alpha production from human blood
Histamine differentially interacts with tumor necrosis factor-alpha and thrombin in endothelial tissue factor induction: the role of c-Jun NH2-terminal kinase.
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BACKGROUND
Histamine plays an important role in vascular disease. Tissue factor (TF) expression is induced in vascular inflammation and acute coronary syndromes.
OBJECTIVE
This study examined the effect of histamine on tumor necrosis factor-alpha- (TNF-alpha-) vs. thrombin-induced endothelial TF
Plasma histamine and tumour necrosis factor-alpha levels in Crohn's disease and ulcerative colitis at various stages of disease.
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Mast cells secrete numerous mediators and this study investigated plasma levels of histamine, and tumor necrosis factor alpha (TNF-α) in chronic inflammatory bowel disease (IBD). Plasma levels of histamine were determined in 68 patients with Crohn's disease (CD), 22 with ulcerative colitis (UC) and
Interferon and antiallergic drug regulation of histamine and tumor necrosis factor-alpha in rat mast cell subsets.
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We have further characterized the heterogeneity of mast cells (MCs) by comparing the ability of rat peritoneal MCs (PMCs) and intestinal mucosal MCs (IMMCs) to produce tumor necrosis factor (TNF)-alpha and by investigating its regulation by interferon (IFN) and the antiallergic drugs nedocromil
Histamine receptor antagonists, cyclooxygenase blockade, and tumor necrosis factor during acute septic insult.
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Tumor necrosis factor (TNF) may be a major endogenous mediator of sepsis-induced acute organ injury. We proposed that treatment of septic pigs with the combined agents ibuprofen, a cyclooxygenase inhibitor, and histamine receptor antagonists, cimetidine (H2 antagonist) and diphenhydramine (H1
Histamine suppresses gene expression and synthesis of tumor necrosis factor alpha via histamine H2 receptors.
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Histamine and tumor necrosis factor alpha (TNF-alpha) can each contribute to the pathogenesis of allergic reactions and chronic inflammatory diseases. We now report the effect of histamine on gene expression and total cellular synthesis of TNF-alpha. Lipopolysaccharide (LPS)-induced synthesis of
Evidence that mast cell degranulation, histamine and tumour necrosis factor alpha release occur in LPS-induced plasma leakage in rat skin.
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1. In the present study we investigated the role of mast cells during inflammation in rat skin. As the release of several pro-inflammatory mediators, such as histamine and tumour necrosis factor alpha (TNFalpha), occurs following mast cell activation we studied whether mast cell degranulation and
Effects of histamine and alpha-fluoromethylhistidine on brain tumor necrosis factor levels in rats.
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Besides the role of histamine (HA) as a neurotransmitter, a new concept has emerged presenting HA as an immunomodulator. Several studies have demonstrated interactions among HA, interleukin-1 beta (IL-1 beta) and tumor necrosis factor (TNF), suggesting a possible bidirectional communication among
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