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Pàgina 1 des de 58 resultats
Possible involvement of inositol-lipid metabolism in malignant hyperthermia.
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Alpha-adrenoceptor stimulation may induce malignant hyperthermia (MH) in vivo. Consequently, we have investigated the effects of the alpha-adrenoceptor agonist phenylephrine and, for comparison, the effects of the beta-adrenoceptor agonist isoproterenol on inositol-lipid metabolism of malignant
[Malignant hyperthermia and inositol phosphate metabolism in the heart and skeletal musculature].
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There are recent reports that inositol phosphate metabolism is involved in the development of malignant hyperthermia (MH). Consequently, we investigated the basal concentration of inositol phosphate products in skeletal and heart muscles of malignant hyperthermia-susceptible (MHS) and healthy
Alterations of inositol polyphosphates in skeletal muscle during porcine malignant hyperthermia.
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Malignant hyperthermia (MH) may result from increased intracellular calcium concentrations. Increased 1,4,5-IP3 concentrations could mediate this increase in Ca2+. In this study we measured inositol polyphosphates in selectively bred MH susceptible (MHS) and MH non-susceptible (MHN) swine. MH crisis
Hypersensitive response of malignant hyperthermia-susceptible skeletal muscle to inositol 1,4,5-triphosphate induced release of calcium.
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Malignant hyperthermia (MH) is associated with abnormal regulation of intracellular calcium in skeletal muscle fibers. Besides a mutation in the ryanodine receptor gene, an increase in inositol, 1,4,5-triphosphate (InsP3) levels could be a possible candidate for the abnormal regulation of
Inositol 1,4,5-trisphosphate in blood and skeletal muscle in human malignant hyperthermia.
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The in vitro contracture test (IVCT) is the only available diagnostic method at present for evaluation of malignant hyperthermia (MH) susceptibility. However, the disadvantage of the IVCT is that it is invasive. Several studies suggest that an altered inositol phosphate system is involved in the
Biochemical changes in malignant hyperthermia susceptible swine: cyclic AMP, inositol phosphates, alpha 1, beta 1- and beta 2-adrenoceptors in skeletal and cardiac muscle.
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It has been presumed that alteration in the concentrations of second messengers leads to alterations in the function of the ryanodine receptor. Consequently, we have determined the basal content of cyclic AMP and inositol phosphates in skeletal and cardiac muscle of malignant hyperthermia (MH)
Effects of the 5-HT2 receptor antagonist ritanserin on halothane-induced increase of inositol phosphates in porcine malignant hyperthermia.
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Recent studies have shown a significant increase of inositol phosphates (IPs) in skeletal muscle during episodes of halothane-induced malignant hyperthermia (MH) in pigs. After treatment with dantrolene and disappearance of MH crisis the IP concentrations returned to basal levels. In order to
Inositol 1,4,5-trisphosphate synthesis in mononuclear white blood cells of malignant hyperthermia-susceptible and normal human beings, following in vitro exposure to halothane, caffeine and ryanodine.
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Despite a plethora of findings associated with the pathophysiology of malignant hyperthermia (MH), the in vitro contracture test (IVCT) is the only reliable test for diagnosis of this heterogeneous syndrome in man. An increase of 1,4,5-IP3 (inositol 1,4,5-trisphosphate), a second messenger involved
A possible role for inositol 1,4,5-trisphosphate (IP3) in malignant hyperthermia.
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In Malignant Hyperthermia an increased open probability of the ryanodine Ca(2+)-channels in the SR-membrane primes a higher cytosolic Ca(2+)-concentration. This in turn accelerates ATP-hydrolysis culminating in a gradual decrease in ATP-levels. At low ATP-levels, IP3-synthesis is being stimulated
Inositol phosphate levels in WRK-1 cells during hyperthermia.
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Inositol-1,4,5-trisphosphate and malignant hyperthermia.
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Inositol-Requiring Enzyme 1-Mediated Downregulation of MicroRNA (miR)-146a and miR-155 in Primary Dermal Fibroblasts across Three TNFRSF1A Mutations Results in Hyperresponsiveness to Lipopolysaccharide.
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Tumor necrosis factor (TNF)-receptor-associated periodic fever syndrome (TRAPS) is a rare monogenic autoinflammatory disorder characterized by mutations in the TNFRSF1A gene, causing TNF-receptor 1 (TNFR1) misfolding, increased cellular stress, activation of the unfolded protein response (UPR), and
Enhancement of hyperthermia-induced apoptosis by a free radical initiator, 2,2'-azobis (2-amidinopropane) dihydrochloride, in human histiocytic lymphoma U937 cells.
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To elucidate the mechanism how a free radical initiator, 2,2'-azobis (2-amidinopropane) dihydrochloride (AAPH), induces cell death at hyperthermic temperatures, apoptosis in a human histiocytic lymphoma cell line, U937, was investigated. Free radical formation deriving from the thermal decomposition
Enhancement of hyperthermia-induced apoptosis by local anesthetics on human histiocytic lymphoma U937 cells.
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The combined effects of hyperthermia at 44 degrees C and local anesthetics on apoptosis in human histiocytic lymphoma U937 cells were investigated. When the cells were exposed to hyperthermia for l0 min marginal DNA fragmentation and nuclear fragmentation were observed. In the presence of amide-type
Enhanced mobilization of intracellular Ca2+ induced by halothane in hepatocytes isolated from swine susceptible to malignant hyperthermia.
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Halothane, in a dose-dependent manner, induced the release of intracellular Ca2+ in hepatocytes prepared from swine. The magnitude of the release induced by halothane was greater for hepatocytes prepared from animals susceptible to malignant hyperthermia (MH) than for those from normal swine. Two
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