title: Effect of low-dose oral contraceptives on lipoproteins and lipolytic enzymes: differences between two commonly used preparations.
abstract: Changes in circulating lipoproteins, which may be related to the risk for atherosclerotic vascular disease, were studied in a control group and in two groups of 24 or 26 women using different preparations of low-dose oral contraceptives for 3 months. One preparation contained 150 micrograms levo-norgestrel and 30 micrograms ethinylestradiol (Stediril-d 150/30); the other contained 750 micrograms lynestrenol and 37.5 micrograms ethinylestradiol (Ministat). No significant changes were found with either of the preparations in serum cholesterol or high density lipoprotein cholesterol (HDL-C) levels. Apolipoprotein A-II levels increased during Ministat treatment from 50.4 to 61.4 mg/dL and during Stediril-d 150/30 treatment from 52.7 to 58.9 mg/dL (both P less than 0.001). These changes differed significantly from each other (P less than 0.01). Apolipoprotein A-I levels increased significantly during use of Ministat only. Apolipoprotein B in low density lipoprotein increased by about 20% (P less than 0.001) in both groups. Post-heparin lipoprotein lipase activity did not change, but hepatic lipase activity decreased to the same extent in both groups (P less than 0.001). Reductions in post-heparin lipase activity were not correlated with increases in HLD-C.
mesh_terms: D000328:Adult; D001053:Apolipoproteins / Q000097:blood; D002784:Cholesterol / Q000097:blood; D003276:Contraceptives, Oral / Q000494:pharmacology*; D003277:Contraceptives, Oral, Combined / Q000494:pharmacology; D003279:Contraceptives, Oral, Sequential / Q000494:pharmacology; D004997:Ethinyl Estradiol / Q000494:pharmacology*; D019304:Ethinyl Estradiol-Norgestrel Combination; D005260:Female; D006801:Humans; D008049:Lipase / Q000097:blood*; D008071:Lipoprotein Lipase / Q000097:blood*; D008074:Lipoproteins / Q000097:blood*; D008099:Liver / Q000201:enzymology; D008234:Lynestrenol / Q000494:pharmacology*; D009644:Norgestrel / Q000494:pharmacology*; D014280:Triglycerides / Q000097:blood
chemical_list: D001053:Apolipoproteins; D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D003279:Contraceptives, Oral, Sequential; D008074:Lipoproteins; D014280:Triglycerides; D009644:Norgestrel; D004997:Ethinyl Estradiol; D019304:Ethinyl Estradiol-Norgestrel Combination; C020414:Ministat; D002784:Cholesterol; D008049:Lipase; D008071:Lipoprotein Lipase; D008234:Lynestrenol