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phenylalanine/некроза
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Страница 1 от 469 резултата
Activation of neutrophils by cachectin/tumor necrosis factor: priming of N-formyl-methionyl-leucyl-phenylalanine-induced oxidative responsiveness via receptor mobilization without degranulation.
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Human recombinant cachectin/tumor necrosis factor (TNF) was shown to prime neutrophils (PMNs), in a dose-dependent fashion, for subsequent oxidative responsiveness toward n-formyl-methionyl-leucyl-phenylalanine (FMLP). One basis for this phenomenon appeared to be TNF-mediated FMLP receptor
Tumor necrosis factor-alpha primes pulmonary hemodynamic response to N-formyl-L-methionyl-L-leucyl-L-phenylalanine.
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We tested the hypothesis that tumor necrosis factor-alpha (TNF-alpha) primes the hemodynamic response to the neutrophil agonist N-formyl-L-methionyl-L-leucyl-L-phenylalanine (FMLP) in lungs isolated from guinea pigs. Lungs were isolated from animals 18 h after injection of TNF-alpha (3.20 x 10(5)
Fibrin regulates neutrophil migration in response to interleukin 8, leukotriene B4, tumor necrosis factor, and formyl-methionyl-leucyl-phenylalanine.
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We have examined the capacity of four different chemoattractants/cytokines to promote directed migration of polymorphonuclear leukocytes (PMN) through three-dimensional gels composed of extracellular matrix proteins. About 20% of PMN migrated through fibrin gels and plasma clots in response to a
Opposing effects of tumor necrosis factor-alpha and nerve growth factor upon leukotriene C4 production by human eosinophils triggered with N-formyl-methionyl-leucyl-phenylalanine.
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Tumor necrosis factor (TNF) as well as the hematopoietic growth factors interleukin-3, interleukin-5, and granulocyte-macrophage colony-stimulating factor affect several eosinophil functions. We previously reported (J. Exp. Med. 1989. 170: 467; 1990. 172: 1577) that the hematopoietic growth factors
Tumor necrosis factor-alpha decreases neutrophil chemotaxis to N-formyl-1-methionyl-1-leucyl-1-phenylalanine: analysis of single cell movement.
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Tumor necrosis factor-alpha (TNF-alpha), a cytokine produced by mononuclear cells in response to endotoxin, inhibits neutrophil chemotaxis. We analyzed the effects of TNF-alpha on the orientation and movement of individual neutrophils in a chemoattractant gradient. Neutrophils, treated or untreated
Tumor necrosis factor-alpha modulates the selective interference of hypnotics and sedatives to suppress N-formyl-methionyl-leucyl-phenylalanine-induced oxidative burst formation in neutrophils.
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OBJECTIVE
To clarify whether tumor necrosis factor (TNF)-alpha modulates the inhibitory effect of clinically applied hypnotics and sedatives on neutrophil function.
METHODS
Prospective, randomized, controlled, dose response, in vitro study.
METHODS
A university research
Activation of NADPH-oxidase and its associated whole-cell H+ current in human neutrophils by recombinant human tumor necrosis factor alpha and formyl-methionyl-leucyl-phenylalanine.
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Proton accumulation and efflux associated specifically with NADPH oxidation in neutrophils remains to be elucidated. Using confocal fluorescence and patch-clamp recordings from single human neutrophils, in the presence of protein kinase C inhibitors, we studied the transient cytosolic acidification
Preliminary feasibility study on differential diagnosis between radiation-induced cerebral necrosis and recurrent brain tumor by means of [18F]fluoro-borono-phenylalanine PET/CT.
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OBJECTIVE
A previous study reported that a differential diagnosis between glioblastoma progression and radiation necrosis by 4-borono-2-[18F]-fluoro-phenylalanine ([18F]FBPA) PET can be made based on lesion-to-normal ratio of [18F]FBPA accumulation. Two-dimensional data acquisition mode PET alone
Deficient priming activity of newborn cord blood-derived polymorphonuclear neutrophilic granulocytes with lipopolysaccharide and tumor necrosis factor-alpha triggered with formyl-methionyl-leucyl-phenylalanine.
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Newborn infants are more susceptible to bacterial infections than adults. This susceptibility has been attributed to defects in humoral and cellular activity. Host cellular activity can be modified by factors produced by bacteria or the host in response to infection. We assessed the effect of two
Tumor necrosis factor-alpha regulates expression of receptors for formyl-methionyl-leucyl-phenylalanine, leukotriene B4, and platelet-activating factor. Dissociation from priming in human polymorphonuclear neutrophils.
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TNF-alpha enhances polymorphonuclear responses to many stimuli, including chemotactic peptide FMLP. It also promotes expression of FMLP receptors and thus may prime polymorphonuclear neutrophils to this and other agonists by up-regulating signal recognition molecules. However, we find that the
N-formyl-methionyl-leucyl-phenylalanine (fMLP) inhibits tumour necrosis factor-alpha (TNF-alpha) production on lipopolysaccharide (LPS)-stimulated human neutrophils.
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During gram-negative infections bacterial components, such as LPS and formylated peptides, exert profound physiological effects on polymorphonuclear neutrophils (PMN) resulting in increased neutrophil effector activities, including the generation of oxidative metabolites, degranulation, phagocytosis
4-Borono-2-18F-fluoro-L-phenylalanine PET for boron neutron capture therapy-oriented diagnosis: overview of a quarter century of research.
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4-10B-Borono-2-18F-fluoro-L-phenylalanine (18F-FBPA) was developed for monitoring the pharmacokinetics of 4-10B-borono-L-phenylalanine (10B-BPA) used in boron neutron capture therapy (BNCT) with positron emission tomography (PET). The
Mobilizable intracellular pool of p55 (type I) tumor necrosis factor receptors in human neutrophils.
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The distribution of type I (p55) and type II (p75) tumor necrosis factor receptors (TNF-Rs) in human polymorphonuclear neutrophils (PMNs) was analyzed by Western blotting of subcellular fractions obtained by centrifugation of PMN cavitates on Percoll density gradients. In resting PMNs, the p55
In vivo induction of gamma interferon and tumor necrosis factor by interleukin-2 infusion following intensive chemotherapy or autologous marrow transplantation.
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Interleukin-2 (IL-2) therapy may improve immune reconstitution and reduce the risk of leukemic relapse in the setting of minimal residual disease by augmenting cytotoxic effector mechanisms directed at residual malignant cells. In addition, IL-2 in vitro promotes the release of cytokines including
Gabexate mesilate, a synthetic protease inhibitor, attenuates endotoxin-induced pulmonary vascular injury by inhibiting tumor necrosis factor production by monocytes.
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OBJECTIVE
In order to determine whether gabexate mesilate, a synthetic protease inhibitor with anticoagulant properties, is useful for the treatment of adult respiratory distress syndrome, we examined its effect on endotoxin-induced pulmonary vascular injury in rats.
METHODS
Prospective, randomized,
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