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  • Title: High density lipoprotein, apoproteins A-I and A-II and postheparin plasma lipolytic enzymes after ileal bypass.
    Author: Koivisto P, Kuusi T, Miettinen TA.
    Journal: Atherosclerosis; 1987 Feb; 63(2-3):181-6. PubMed ID: 3103635.
    Abstract:
    Apoproteins A-I and A-II, and the activities of lipoprotein lipase (LPL) and hepatic lipase (HL), were studied in 16 patients 3-12 years after ileal bypass operation and in 13 controls, all heterozygous for familial hypercholesterolemia, to investigate why the operated subjects had a higher HDL cholesterol level than the unoperated controls. HDL- and HDL2-cholesterol and apoprotein A-I were higher, HDL3-cholesterol was similar and apoprotein A-II tended to be lower in the operated than the control subjects. The activities of LPL and HL were similar in the 2 groups. HL was negatively correlated with HDL2-cholesterol, whereas LPL was not associated with any of the HDL components. The controls had gained in weight during the follow-up, but the HDL components were not correlated with relative body weight. It is concluded that in familial hypercholesterolemia ileal bypass results in higher HDL- and HDL2-cholesterol and apoprotein A-I level than conservative treatment and that postheparin plasma lipolytic enzymes do not explain the higher level of these HDL components in the operated subjects.
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