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- W2017241925 abstract "The LD50 (25 hr, i.p.) for microcystin-LR in fed rats (122 μg/kg) was significantly higher than that in fasted rats (72 μg/kg). At doses of 100, 150 and 200 μg of microcystin-LR per kg, the median times to death were 31.9, 18.2 and 11.2 hr for fed rats, and 1.8, 1.7 and 1.5 hr for fasted rats. A sublethal dose of microcystin (50 μg/kg) afforded protection to fasted, but not fed, rats against a subsequent lethal dose (200 μg/kg) challenge given 72 hr later. Biochemical and ultrastructural changes resulting from microcystin-LR (100 μg/kg, i.p.) were compared in fed and fasted rats 1 hr after injection. In both groups, liver weight and serum levels of sorbitol dehydrogenase and glucose significantly increased. Plasma membranes, isolated from livers of fed or fasted rats, exhibited similar toxin-induced changes in associated cytoskeletal elements. Liver mitochondria from toxin-treated, fasted rats exhibited complete inhibition of state 3 respiration, while those from toxin-treated, fed rats had ADP/O ratios and respiratory control indices comparable to control values. The primary event responsible for enhanced microcystin hepatotoxicity in the fasted state has not yet been identified. Depletion of glycogen stores and a decreased respiratory capacity may, however, play significant roles in this degenerative process." @default.
- W2017241925 created "2016-06-24" @default.
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- W2017241925 date "1991-01-01" @default.
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- W2017241925 title "Hepatotoxicity of microcystin-LR in fed and fasted rats" @default.
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- W2017241925 doi "https://doi.org/10.1016/0041-0101(91)90287-2" @default.
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