Danielsson B, Ekman R, Johansson B G, Petersson B G
Clin Chim Acta. 1977 Oct 1;80(1):157-70. doi: 10.1016/0009-8981(77)90275-3.
Plasma lipoproteins were compared before and after surgical induction of extrahepatic biliary obstruction in dogs by immunochemical techniques, zonal ultracentrifugation and gel filtration. A considerable increase in LDL was found one week after operation, with a zonal ultracentrifugal pattern which was more complex than that found before operation. The lipid composition was characterized by an increase of phospholipids and a decrease of triglycerides in cholestatic LDL fractions. None of the fractions displayed the inverse cholesterol-cholesterol ester ratio, characteristic for human LP-X. The apoprotein composition of cholestatic LDL was also markedly changed. Apoprotein A I, already present in the normal LDL2 subclass, increased and two apoproteins with apparent molecular weight of 35000-40000 appeared in considerable amounts. The amount of HDL was decreased during cholestasis without any appreciable changes in composition.
