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Study of cytoskeletal changes induced by okadaic acid in HL-7702 liver cells and development of a fluorimetric microplate assay for detecting diarrhetic shellfish poisoning.

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Diarrhetic shellfish poisoning (DSP) is a gastrointestinal illness with symptoms such as diarrhea, nausea, vomiting, headache, chills and moderate to severe abdominal pain. DSP has been recognized as a worldwide public health problem, causing great concern to the shellfish industry. Accumulation of

Repeated oral co-exposure to yessotoxin and okadaic acid: a short term toxicity study in mice.

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The polyethers yessotoxin (YTX) and okadaic acid (OA) are two marine algal toxins frequently associated as edible shellfish contaminants. Seafood contamination by these compounds, also at low concentrations and for a long period of time, can increase the possibility of their simultaneous and

Discovery of okadaic acid esters in the toxic dinoflagellate Dinophysis acuta from New Zealand using liquid chromatography/tandem mass spectrometry.

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The dinoflagellate Dinophysis acuta has been associated with various incidents of diarrhetic shellfish poisoning. A sample of Dinophysis acuta collected from New Zealand waters in 2002 was previously found to contain high levels of pectenotoxins, but only a very low level of the diarrhea-inducing

CYP3A4 activity reduces the cytotoxic effects of okadaic acid in HepaRG cells.

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The biotoxin okadaic acid (OA), produced by dinoflagellates in marine environment, can accumulate in sponges and shellfish. Consumption of contaminated shellfish induces acute toxic effects such as diarrhea, nausea, vomiting, and abdominal pain. CYP3A4, one of the most important human xenobiotic

Active elimination of the marine biotoxin okadaic acid by P-glycoprotein through an in vitro gastrointestinal barrier.

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The consumption of okadaic acid (OA) contaminated shellfish can induce acute toxic symptoms in humans such as diarrhea, nausea, vomiting and abdominal pain; carcinogenic and embryotoxic effects have also been described. Toxicokinetic studies with mice have shown that high cytotoxic doses of OA can

First evidence of Okadaic acid acyl-derivative and Dinophysistoxin-3 in mussel samples collected in Chiloe Island, Southern Chile.

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This paper shows the detection of Diarrhetic Shellfish Poison (DSP) phycotoxins, using HPLC-FLD with pre-column derivatization procedure and HPLC-MS methods, in the analysis of shellfish extracts tested positive with the official DSP mouse bioassay. The shellfish samples were collected in Chiloe

Study of cytoskeletal changes induced by okadaic acid in BE(2)-M17 cells by means of a quantitative fluorimetric microplate assay.

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The diarrhogenic activity of the marine toxin okadaic acid (OA) has been associated to its actin-disrupting effect, which could reflect the loosening of tight junctions in vivo. In this report, we present results obtained using a fluorimetric microplate assay for quantitative measurements of

Glucose uptake in enterocytes: a test for molecular targets of okadaic acid.

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The main diarrheic shellfish poisoning (DSP) toxin is okadaic acid (OA). Although OA is a protein phosphatase 1 and 2A inhibitor less is known about the involvement of the toxin in diarrhea. The initial statement was that OA, by altering the phosphorylation state of proteins, might modify glucose

Effect of okadaic acid on glucose regulation.

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Okadaic acid is the main toxin responsible for the natural phenomena known as diarrheic shellfish poisoning (DSP). This toxin is a tumor promoter C38 polyether fatty acid that contains acidic and hydrophobic moieties and is cyclic. Okadaic acid is a potent inhibitor of important classes of protein

Marine toxins and the cytoskeleton: okadaic acid and dinophysistoxins.

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Okadaic acid (OA) and its analogs, the dinophysistoxins, are potent inhibitors of protein phosphatases 1 and 2A. This action is well known to cause diarrhea and gastrointestinal symptons when the toxins reach the digestive tract by ingestion of mollusks. A less well-known effect of these group of

Toxic Action Reevaluation of Okadaic Acid, Dinophysistoxin-1 and Dinophysistoxin-2: Toxicity Equivalency Factors Based on the Oral Toxicity Study.

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OBJECTIVE Okadaic acid (OA) and the structurally related compounds dinophysistoxin-1 (DTX1) and dinophysistoxin-2 (DTX2) are marine phycotoxins that cause diarrheic shellfish poisoning (DSP) in humans due to ingestion of contaminated shellfish. In order to guarantee consumer protection, the

Analysis of the passage of the marine biotoxin okadaic acid through an in vitro human gut barrier.

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The marine biotoxin okadaic acid (OA), produced by dinoflagellates, can accumulate in various bivalve molluscs. In humans, oral consumption of shellfish contaminated with OA induces acute toxic effects like diarrhea, nausea, vomiting and abdominal pain. However, tumorigenic and embryotoxic effects

Effects of the diarrhetic shellfish toxin, okadaic acid, on cytoskeletal elements, viability and functionality of rat liver and intestinal cells.

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The diarrhetic shellfish toxin, okadaic acid, administered to rats by intragastric intubation, caused intestinal damage, diarrhea and death, but had no detectable effect on the liver. In contrast, okadaic acid administered intravenously had little effect on intestinal function, but caused a rapid

The toxin of diarrheic shellfish poisoning, okadaic acid, increases intestinal epithelial paracellular permeability.

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OBJECTIVE Diarrhea associated with shellfish poisoning is poorly understood. The responsible toxin, dinophysistoxin 1, has been identified as okadaic acid, a potent phosphatase inhibitor, but its effects on intestinal epithelia have not been examined. The aim of this study was to investigate the

Phosphorene-gold nanocomposite based microfluidic aptasensor for the detection of okadaic acid.

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Okadaic acid (OA) is one of the most prevalent and largely distributed bio-toxin in the world. Consumption of OA results in a series of digestive ailments such as nausea and diarrhea. This study demonstrates the preparation and functioning of an electrochemical microfluidic biochip for the detection

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