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Potential roles of membrane fluidity and ceramide in hyperthermia and alcohol stimulation of TRAIL apoptosis.

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We recently reported that a mild heat shock induces a long lasting stimulation of TRAIL-induced apoptosis of leukemic T-lymphocytes and myeloid cell lines, but not normal T-lymphocytes, which correlates with an enhanced ability of TRAIL to recognize its receptors. As shown here, this phenomenon

Hyperthermia engages the intrinsic apoptotic pathway by enhancing upstream caspase activation to overcome apoptotic resistance in MCF-7 breast adenocarcinoma cells.

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Febrile hyperthermia enhanced TNF-stimulated apoptosis of MCF-7 cells and overcame resistance in a TNF-resistant, MCF-7 variant (3E9), increasing their TNF-sensitivity by 10- and 100-fold, respectively. In either cell line, the hyperthermic potentiation was attributable to increased apoptosis that

Mild testicular hyperthermia transiently increases lipid droplet accumulation and modifies sphingolipid and glycerophospholipid acyl chains in the rat testis.

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Spermatogenesis is known to be vulnerable to temperature. The aim of this study was to investigate the effects on testicular lipids of the transient germ cell loss that is induced by mild testicular hyperthermia. Adult rat testes were exposed once a day to 43 °C for 15 min for 5 days and the effects

Ceramide mediates the rapid phase of febrile response to IL-1beta.

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IL-1beta was identified after a long search for the endogenous pyrogen. It acts by inducing synthesis of prostaglandin E2, which mediates the late phase of IL-1beta-induced fever. Here we show by radiotelemetry that the early phase of the fever response to IL-1beta is mediated by ceramide.

Ceramide in the regulation of eryptosis, the suicidal erythrocyte death.

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Similar to apoptosis of nucleated cells, erythrocytes may undergo eryptosis, a suicidal death characterized by cell shrinkage and phospholipid scrambling of the cell membrane leading to phosphatidylserine exposure at the cell surface. As eryptotic erythrocytes are rapidly cleared from circulating

Persistence of elevated levels of galactosyl-alpha(1-3)galactose antibodies in sera from patients cured of visceral leishmaniasis.

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Using rabbit erythrocyte-derived neutral glycosphingolipids enriched for a ceramide pentasaccharide as the antigen, we detected elevated anti-galactosyl-alpha(1-3)galactose (anti-G alpha G) antibody levels in 76% of children with active visceral leishmaniasis (kala-azar [KA]) and in 42% of

Farber's disease (disseminated lipogranulomatosis)--a pathological, histochemical and ultrastructural study--.

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The first case of Farber's disease in Japan was reported, which was confirmed clinically, biochemically and pathologically. Soon after birth, the patient started developing hoarseness, stridor, fever, muscle hypotonous with retarded psychomotor functions including incapability of sitting alone and

Stimulation of Erythrocyte Cell Membrane Scrambling by C-Reactive Protein.

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BACKGROUND Eryptosis, the suicidal erythrocyte death characterized by cell shrinkage and phosphatidylserine-translocation, is triggered by fever and inflammation. Signaling includes increased cytosolic Ca2+-activity ([Ca2+]i), caspase activation, and ceramide. Inflammation is associated with

Iron loaded ferritin secretion and inhibition by CI-976 in Aedes aegypti larval cells.

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Ferritin is a multimer of 24 subunits of heavy and light chains. In mammals, iron taken into cells is stored in ferritin or incorporated into iron-containing proteins. Very little ferritin is found circulating in mammalian serum; most is retained in the cytoplasm. Female mosquitoes, such as Aedes

Fabry's disease: clinical, pathologic and biochemical manifestations in two Chinese males.

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Fabry's disease is a rare hereditary disease transmitted as an X-linked recessive trait with the primary metabolic defect of an enzyme alpha-galactosidase A, resulting in deposition of glycolipids (ceramide trihexoside) in various tissues, including the kidneys. Two sibling cases of Chinese adult

Dengue Virus-Polymersome Hybrid Nanovesicles for Advanced Drug Screening using Real-Time Single Nanoparticle-Virus Tracking.

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Dengue virus (DENV) is a major infectious viral pathogen that affects millions of individuals worldwide every year, causing a potentially fatal syndrome, while no commercial antiviral drugs are yet available. To develop an antiviral against Dengue fever, it is necessary to understand the

Mechanisms and significance of eryptosis, the suicidal death of erythrocytes.

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Eryptosis, the suicidal death of erythrocytes, is characterized by erythrocyte shrinkage, blebbing, and phospholipid scrambling of the cell membrane. Eryptosis is triggered by increased cytosolic Ca(2+) activity, which may result from Ca(2+) entry through PGE(2)-activated Ca(2+)-permeable cation

Thermoresponsive and biodegradable linear-dendritic nanoparticles for targeted and sustained release of a pro-apoptotic drug.

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Ceramide is a bioactive sphingolipid-derived second messenger that has been demonstrated to induce apoptosis and cell cycle arrest in various cancer cell culture systems. Although in vitro tumor cell culture models have illuminated the potential therapeutic utility of a cell-permeable analog of

Natural history and treatment of uremia secondary to Fabry's disease: an European experience.

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Fabry's disease, a very unusual cause of end-stage renal disease, is actually included in the contraindications to renal transplantation. The few published studies, based on very few patients, report a high rate of life-threatening complications, mostly infectious, following kidney transplant in

Temperature sensitivity of suicidal erythrocyte death.

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BACKGROUND Fever and hyperthermia are frequently associated with anaemia. Under most clinical conditions, they are considered to be two mutually independent clinical consequences of a common cause. The present study explored the possibility that anaemia results from temperature-sensitive suicidal

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