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1 Acta Biochimica Polonica

1 1993

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Changes in lipoprotein lipase activity and plasma liver lipids in thiram intoxicated rats

100%

Sadurska B. , Boguszewski B.

tom 40

nr 4

Acute thiram (tetramethyl-bls-thlocarbamyl disulphide) poisoning of rat (a single dose of 50% LDso) caused decreased lipoprotein lipase (LPL) activity in adipose tissue, the greatest inhibition being observed at 72 h after administration of the pesticide. Simultaneously, the levels of total plasma cholesterol, triacylglycerols and the high density lipoprotein (HDL) cholesterol were increased. On repeated pesticide administration (5% LDso) decreased LPL activity was observed after 14 and 30 days of poisoning, whereas after 90 days the LPL activity was distinctly increased. The levels of total cholesterol (in all periods of poisoning) and HDL cholesterol (only after 30 days of poisoning) became increased. These changes were accompanied by decreased content of free fatty acids and increase of hepatic triacylglycerols. The changes observed in the lipoprotein lipase activity of thiram-poisoned rats correspond to the profiles of plasma lipoproteins typical of thyroid hypofunction.