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ochratoxin a/nécrose
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Relevance of a rat model of papillary necrosis and upper urothelial carcinoma in understanding the role of ochratoxin A in Balkan endemic nephropathy and its associated carcinoma.
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Ochratoxin A is nephrotoxic and has been implicated in the genesis of Balkan endemic nephropathy (BEN), a condition that leads to end-stage renal disease and upper urothelial tumours. This compound induces renal parenchymal carcinoma in male mice only, and is not considered to be a potent carcinogen
In vitro induction of tumor necrosis factor-α by ochratoxin A (OTA) from rat liver: role of Kupffer cells.
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Tumor necrosis factor-α (TNF-α) is released from blood-free perfused rat liver by the fungal metabolite ochratoxin A. Here we have identified Kupffer cells as the sole source of OTA-mediated cytokine release. If single cell preparation of Kupffer cells, hepatocytes, or sinusoidal endothelial cells
Ochratoxin A activates neutrophils and kills these cells through necrosis, an effect eliminated through its conversion into ochratoxin α.
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Ochratoxin A (OTA) is a mycotoxin produced by several species of fungi from the Aspergillus and Penicillium genera that frequently grow in improperly stored food products. OTA has carcinogenic, teratogenic and nephrotoxic potential and sustains a high half-life in human blood. Despite the recently
[In vitro studies into the influence of ochratoxin A on the production of tumor necrosis factor alpha by the human monocytic cell line THP-1].
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The influence of pure OTA and an Aspergillus-ochraceus crude toxin on the intracellular expression and the secretion of tumor necrosis factor (TNF) alpha by the monocytic cell line THP-1 was studied in vitro. After 4 hours exposure, the secretion of TNF alpha was inhibited to 50% by pure OTA in a
The food contaminant and nephrotoxin ochratoxin A enhances Wnt1 inducible signaling protein 1 and tumor necrosis factor-α expression in human primary proximal tubule cells.
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METHODS
The underlying molecular mechanisms of nanomolar ochratoxin A (OTA) concentrations, especially those on pathophysiological relevant gene expression in target tissue and underlying signaling mechanisms are unknown.
RESULTS
qPCR arrays showed that 14 days exposure of human primary proximal
Brain necrosis in mouse fetuses transplacentally exposed to the mycotoxin ochratoxin A.
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Demonstration of ochratoxin A in kidneys of pigs and rats by immunofluorescence microscopy.
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Ochratoxin A was localized in the kidney of pigs and rats by means of immunofluorescence microscopy after short-time exposure. Antibody against ochratoxin A was obtained from rabbits after repeated injections of bovine serum albumin-ochratoxin A conjugate. Ochratoxin A was localized exclusively in
Histopathologic changes in liver and renal tissues induced by Ochratoxin A and melatonin in rats.
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Nephrotoxicity and hepatotoxicity induced by Ochratoxin A (OTA) and ameliorating effects of melatonin were investigated in rats exposed to OTA. Experimental groups were as follows: control; OTA-treated; and OTA plus melatonin (MEL)-treated (OTA+MEL). The rats in the control group were administered
Protective role of melatonin in ochratoxin a toxicity in rat heart and lung.
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Ochratoxin A (OTA) is a mycotoxin produced by different fungi. The most pronounced adverse effect of OTA is hepatonephrotoxicity. Melatonin (MEL) has an antioxidant effect and has free-radical scavenger properties. The effects of OTA on heart and lung tissue and possible ameliorating effects of MEL
Uptake of ochratoxin A by slices of pig kidney cortex.
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Ochratoxin A (OCT A) is a nephrotoxin causing selective necrosis of the proximal tubule. Being an organic anion OCT A might be expected to enter the tubule cells by the organic anion transport system. Pig renal cortical slices were used to characterize the OCT A transport. OCT A (5 X 10(-3) mM) was
Immunotoxic activity of ochratoxin A.
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Ochratoxin A (OTA) is an immunosuppressant fungal compound, produced by toxigenic species of Aspergillus and Penicillium fungi in a wide variety of climates and geographical regions. The contamination of food by this mycotoxin takes place primarily during preharvest periods. Almost all types of food
Proximal tubular toxicity of ochratoxin A is amplified by simultaneous inhibition of the extracellular signal-regulated kinases 1/2.
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Ochratoxin A (OTA) is a mycotoxin involved in the development of chronic nephropathies and a known carcinogen. As we have shown previously, OTA activates mitogen-activated protein kinases [extracellular signal-regulated kinase 1 and 2 (ERK1/2), c-jun amino-terminal kinase (JNK), and
Clinico-pathomorphological, serum biochemical and histological studies in broilers fed ochratoxin A and a toxin deactivator (Mycofix Plus).
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1. Toxic effects of two concentrations (0.5 and 1 mg/kg) of ochratoxin A (OTA) and attenuating effects of a toxin deactivator (Mycofix Plus(MTV INSIDE)) containing the yeast Trichosporon mycotoxinivorans on the performance (feed conversion ratio; body weight gain), serum enzymes (lactate
Cytotoxic effect of ochratoxin A on the renal corpuscles of rat kidney: could ochratoxin A cause kidney failure?
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To demonstrate that Ochratoxin A can cause kidney failure as the kidney is the primary target for OTA cytotoxicity. Ochratoxin A (OTA) is a mycotoxin found in our food. The cytotoxic effect of a low cumulative dose of OTA on the renal corpuscles of the kidney tissue has been investigated in this
Survey of slaughtered pigs for occurrence of ochratoxin A and porcine nephropathy in Serbia.
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Samples of blood, kidney and liver were randomly selected from slaughtered pigs (n=90) and analyzed for ochratoxin A by HPLC. In addition, in order to obtain information on the occurrence of nephropathy, histological examinations were carried out. Of the 90 liver samples, 26.6% contained OTA in the
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