title: Increase of serum very low density lipoproteins in rats after administration of alpha-hexachlorocyclohexane.
abstract: After enteral administration of 200 mg/kg alpha-hexachlorocyclohexane (alpha-HCH) female Wistar rats develop a hyperlipemia. 48 h after administration of alpha-HCH, serum triglycerides are increased by 300%, whereas both serum cholesterol and serum total phospholipids only increase by about 45%. Serum free fatty acids are not significantly altered. Fractionation of the serum lipoproteins by ultracentrifugation shows that the hyperlipemia is due to a fivefold increase in serum very low density lipoproteins. Hepatic triglyceride secretion, calculated after i.v. injection of Triton WR 1339, is increased in animals pretreated wtih alpha-HCH. Corresponding to this observation, drugs known to diminish the triglyceride secretion of the liver, such as actinomycin D, cycloheximide; glucagon, orotic acid, CFT 1201, and CFT 1042 reduce the alpha-HCH-induced hyperlipemia. We concluded from the results that hyperlipoproteinemia after alpha-HCH is due to an increased hepatic very low density lipoprotein secretion. At the same time, the blood sugar level was decreased in fasting animals after treatment with alpha-HCH. Earlier experiments suggest that this effect is due to a decreased gluconeogenesis in the liver.
mesh_terms: D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005260:Female; D001556:Hexachlorocyclohexane / Q000494:pharmacology*; D008079:Lipoproteins, VLDL / Q000097:blood*; D051381:Rats; D013268:Stimulation, Chemical; D013997:Time Factors; D014280:Triglycerides / Q000097:blood
chemical_list: D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D008079:Lipoproteins, VLDL; D014280:Triglycerides; D001556:Hexachlorocyclohexane