chymotrypsin/hypoxie

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Growth and protease secretion of Scedosporium aurantiacum under conditions of hypoxia.

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One of the micro-environmental stresses that fungal pathogens, such as Scedosporium aurantiacum, colonising human lungs encounter in vivo is hypoxia, or deficiency of oxygen. In this work, we studied the impacts of a hypoxic micro-environment (oxygen levels ≤1%) on the growth of a clinical S.

Enhancement of cell death by TNF alpha-related apoptosis-inducing ligand (TRAIL) in human lung carcinoma A549 cells exposed to x rays under hypoxia.

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Our previous study showed that ionizing radiation induced the expression of death receptor DR5 on the cell surface in tumor cell lines and that the death receptor of the TNF alpha-related apoptosis-inducing ligand TRAIL enhanced the apoptotic pathway (Hamasu et al., (2005) Journal of Radiation

Multicatalytic proteinase activity in turtle liver: responses to anoxia stress and recovery.

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Activities of the multicatalytic proteinase complex (MPC) were detected in turtle (Trachemys scripta elegans) liver. The ratio of peptidylglutamyl-peptide bond hydrolyzing, trypsin-like, and chymotrypsin-like activities was 6:2.7:1 for the MPC partially purified by Sepharose CL-6B gel filtration.

Proteasomal proteolysis in anoxia-reoxygenation, preconditioning and postconditioning of isolated cardiomyocytes.

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The role of proteasomal proteolysis in the pathogenesis of ischemia-reperfusion is being actively studied. To evaluate the participation of the proteasome in the preconditioning and postconditioning phenomena we used primary culture of neonatal cardiomyocytes. This culture was undergone 30min of

Chronic hypobaric hypoxia mediated skeletal muscle atrophy: role of ubiquitin-proteasome pathway and calpains.

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The most frequently reported symptom of exposure to high altitude is loss of body mass and decreased performance which has been attributed to altered protein metabolism affecting skeletal muscles mass. The present study explores the mechanism of chronic hypobaric hypoxia mediated skeletal muscle

Redox Remodeling Is Pivotal in Murine Diaphragm Muscle Adaptation to Chronic Sustained Hypoxia.

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Mechanisms underpinning chronic sustained hypoxia (CH)-induced structural and functional adaptations in respiratory muscles are unclear despite the clinical relevance to respiratory diseases. The objectives of the present study were to thoroughly assess the putative role of CH-induced redox

Hyperglycemia-induced degradation of HIF-1α contributes to impaired response of cardiomyocytes to hypoxia.

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OBJECTIVE Cardiovascular disease is the leading cause of mortality and morbidity associated with diabetes. Although impairment of the cell response to hypoxia due to destabilization of the transcription factor hypoxia-inducible factor-1α (HIF-1α), which regulates the expression of genes that help

Hypoxia-reoxygenation enhances interleukin-8 production from U937 human monocytic cells.

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Hypoxia--reoxygenation (H/R) occurs in both inflammatory spots and tumor tissues, sites in which damage is amplified either acutely or chronically through the infiltration of inflammatory cells. Interleukin-8 (IL-8) is a cytokine with chemotactic and angiogenic properties. This study was designed to

Proteasomal degradation of O-GlcNAc transferase elevates hypoxia-induced vascular endothelial inflammatory response†.

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OBJECTIVE Hypoxia induces vascular inflammation by a mechanism not fully understood. Emerging evidence implicates O-GlcNAc transferase (OGT) in inflammation. This study explored the role of OGT in hypoxia-induced vascular endothelial inflammatory response. RESULTS Hypoxia was either induced (1% O2

Association of growth factors, HIF-1 and NF-κB expression with proteasomes in endometrial cancer.

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Insulin-like growth factors (IGFs), vascular endothelial growth factor (VEGF), hypoxia-inducible factor-1 (HIF-1), and nuclear factor kappa-B (NF-κB) are known to play an important role in endometrial cancer pathogenesis. However, the proteolytic regulation of these factors is still poorly

A histopathological study of pancreatic lesions after chronic administration of methamphetamine to rats.

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The effects of chronic administration of methamphetamine on pancreatic tissues were histopathologically studied in experimental models. Methamphetamine (1 ml/kg body weight/day) was subcutaneously injected into 14 five-week-old male Wistar Kyoto rats (WKY) for 12 weeks. Age and sex matched 5 WKY

Heterotopic pancreatic tissue presenting as a solid and cystic lung lesion: a very unusual bronchopulmonary foregut malformation.

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We describe the history and lung pathology of a premature female infant, who presented with respiratory distress immediately after birth. A thoracic computerized tomography scan showed abnormalities suggestive of congenital cystic adenomatoid malformation of the left lung. In addition,

[The influence of quercetin on the activity of purified 20S, 26S proteasome and proteasomal activity in isolated cardiomyocytes].

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For the clarification of the effect of quercetin on the proteasome experiments were performed using purified 20S proteasome, 26S proteasome from the proteasomal fraction II (PF II), as well as cardiomyocyte culture which underwent anoxia-reoxygenation. In the experiments with purified 20S proteasome

Proteasome inhibitors eliminate protective effect of postconditioning in cultured neonatal cardiomyocytes.

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A role of proteasomal proteolysis in the pathogenesis of ischemia-reperfusion is being actively studied. To evaluate the participation of the proteasome in postconditioning phenomenon, we used primary culture of neonatal cardiomyocytes. 30 minutes of anoxia followed by 60 minutes of reoxygenation

The importance of cycling of blood alcohol levels in the pathogenesis of experimental alcoholic liver disease in rats.

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OBJECTIVE Rats fed ethanol at a constant rate through a permanent intragastric cannula have a regular fluctuation in blood alcohol level (BAL) and urine alcohol level (UAL). The level of ethanol peaks every 6-10 days. The question is how the liver differs at the peaks and troughs of the UAL cycle.

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