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Pàgina 1 des de 282 resultats
A cascade of degradative hydrolase activity contributes to hepatocyte necrosis during anoxia.
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Calpain proteases contribute to hepatocyte necrosis during anoxia. Our aim was to ascertain the mechanism causing calpain activation during anoxia. In rat hepatocytes, a twofold increase in calpain activity occurred despite the lack of an increase in cytosolic Ca2+ concentration ([Ca2+]i). The
Studies on intracardiac acid hydrolases in the ischemic myocardial necrosis.
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Activities and subcellular distributions of acid hydrolases, cathepsin D, acid phosphatase and beta-glucuronidase in myocardial subfractions were determined serially with reference to the initiation of myocardial necrosis in dog hearts with acute ischemia. The following results were obtained: 1) In
Acid hydrolases in the initiation of ischemic myocardial necrosis.
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Alterations in myocardial acid hydrolases in acute ischemia were studied in relation to the evolution of cardiac cellular necrosis by the determination of cathepsin D, acid phosphatase (AcPase), and beta-glucuronidase activities of the myocardial fractions and by electron microscopic cytochemical
Macrophage-specific transgenic expression of cholesteryl ester hydrolase significantly reduces atherosclerosis and lesion necrosis in Ldlr mice.
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Accumulation of cholesteryl esters (CEs) in macrophage foam cells, central to atherosclerotic plaque formation, occurs as a result of imbalance between the cholesterol influx and efflux pathways. While the uptake, or influx, of modified lipoproteins is largely unregulated, extracellular
Acid hydrolase activity during the growth, necrosis, and regression of the Jensen sarcoma.
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Proteomic analysis of 'hybrid necrosis' in wheat (Triticum aestivum) leaves
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Wheat hybrid necrosis has been genetically characterised for many years, but the specific gene(s) and the protein products involved in the processes remains unknown. In this study, protein expression in the base (B), mid (M) and tip (T) segments of the FL-2 leaves of a necrotic hybrid, PZF1 and its
Excessive ATP hydrolysis in ischemic myocardium by mitochondrial F1F0-ATPase: effect of selective pharmacological inhibition of mitochondrial ATPase hydrolase activity.
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Mitochondrial F(1)F(0)-ATPase normally synthesizes ATP in the heart, but under ischemic conditions this enzyme paradoxically causes ATP hydrolysis. Nonselective inhibitors of this enzyme (aurovertin, oligomycin) inhibit ATP synthesis in normal tissue but also inhibit ATP hydrolysis in ischemic
Lipopolysaccharide-induced pulmonary inflammation is not accompanied by a release of anandamide into the lavage fluid or a down-regulation of the activity of fatty acid amide hydrolase.
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The effect of lipopolysaccharide inhalation upon lung anandamide levels, anandamide synthetic enzymes and fatty acid amide hydrolase has been investigated. Lipopolysaccharide exposure produced a dramatic extravasation of neutrophils and release of tumour necrosis factor alpha into the
Endocannabinoid hydrolase and cannabinoid receptor 1 are involved in the regulation of hypothalamus-pituitary-adrenal axis in type 2 diabetes.
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Hypothalamus-pituitary-adrenal (HPA) axis, as the key moderator in energy metabolism, plays an important role in diabetes. The endogenous cannabinoid system (eCBs) involves in neuronal functions, and simultaneously cannabinoid receptors are almost expressed in all regions of the hypothalamus
Exhaustive exercise, endurance training, and acid hydrolase activity in skeletal muscle.
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The activity of eight acid hydrolases and two energy metabolism enzymes were assayed from homogenates of predominantly red (proximal heads of m. vastus lateralis, m. vastus medialis, and m. vastus intermedius) and predominantly white (distal head of m. vastus lateralis) skeletal muscle of mice
The Fatty Acid Amide Hydrolase Inhibitor URB937 Ameliorates Radiation-Induced Lung Injury in a Mouse Model.
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Radiation-induced lung injury (RILI) is a potentially life-threatening complication of radiotherapy. In the current study, we examined the potential protective effects of URB937, an inhibitor of fatty acid amide hydrolase using a mouse model of RILI. Briefly, male C57BL/6 mice received 16Gy
Effect of collateral flow on epicardial and endocardial lysosomal hydrolases in acute myocardial ischemia.
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Early changes in lysosomal enzymes must occur if their role is significant in irreversible myocardial injury. Therefore, we ligated the anterior descending coronary artery in 14 dogs and after 60 min excised epicardial and endocardial samples from the ischemic and adjacent normal heart. The
Mannose 6-phosphorylated proteins are required for tumor necrosis factor-induced apoptosis: defective response in I-cell disease fibroblasts.
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Whereas caspases are essential components in apoptosis, other proteases seem to be involved in programmed cell death. This study investigated the role of lysosomal mannose 6-phosphorylated proteins in tumor necrosis factor (TNF)-induced apoptosis. We report that fibroblasts isolated from patients
Recombinant human tumour necrosis factor (rTNF)2 enhances leukotriene biosynthesis in neutrophils and eosinophils stimulated with the Ca2+ ionophore A23187.
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Recombinant human tumour necrosis factor alpha (rTNF) did not cause the release of leukotrienes (LT) by human neutrophils and eosinophils. It did, however, prepare neutrophils and eosinophils for enhanced production of LT after activation with the calcium ionophore A23187. The effect was observed
Lipid IVA inhibits synthesis and release of tumor necrosis factor induced by lipopolysaccharide in human whole blood ex vivo.
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Tumor necrosis factor (TNF) released by lipopolysaccharide (LPS)-stimulated mononuclear phagocytes is a critical mediator of sepsis. We examined the capacities of rough mutant Salmonella typhimurium LPS (Rc) and LPS partial structures lipid A, monophosphoryl lipid A (MPLA), lipid IVA, and lipid X to
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