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Plasma lipids, lipoproteins and apolipoproteins in two kindreds of hypobetalipoproteinemia

par Lontie, Jean-Francois;Malmendier, Claude ;Serougne, Colette;Dubois, David ;Dachet, Christiane;Férézou, Jacqueline;Mathe, Denis
Référence Atherosclerosis, 83, 2-3, page (187-196)
Publication Publié, 1990

Article révisé par les pairs

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Résumé :

Plasma lipids and apolipoproteins were quantified in two kindreds of hypobetalipoproteinemia. All affected members were asymptomatic but showed a decrease of 75% in apolipoprotein B and of 69% in LDL-cholesterol. There were no major changes in apo A-I and A-II but all affected family members had reduced levels of apo C-II (by 58%) and C-III (by 59%) without significant decrease in apo C-I and no specific decrease of apo C-III1. Apolipoprotein E is decreased in SDS-PAGE. The plasma level and phenotype of Lp(a) are not affected by HBL, suggesting that a catabolic rather than a synthetic mechanism is responsible for the disease. As shown by density gradient ultracentrifugation, HDL2 particles that contain essentially apolipoprotein A-I, cholesterol and phospholipids represent in affected subjects the major part of HDL. Due to the net reduction of apolipoprotein B-containing particles (VLDL and LDL) as acceptors of lipids in HBL, there is an accumulation of large particles rich in cholesteryl esters.