Journal of Lipid Research, Vol. 11, 82-86, March 1970
Copyright © 1970 by Lipid Research, Inc.
Biosynthesis of cholesterol in rabbit reticulocytes and its exchange with plasma
Henry A. Sloviter , Vera Janic , and Tanasije Cirkovic
Harrison Department of Surgical Research, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
When rabbit reticulocytes were incubated in normal blood plasma containing mevalonic acid-2-14C, radioactivity was incorporated into cholesterol, cholesteryl esters, and squalene in the cells. The squalene reached a steady level of radioactivity much more rapidly than did cholesterol.
Rabbit reticulocytes which were labeled as a result of previous incubation with mevalonic acid-2-14C were incubated with normal autologous blood plasma. The specific activity of the cholesterol in the plasma rapidly became higher than that of the cells. This suggests that there is compartmentation of cholesterol in the reticulocyte and that a pool involved in exchange with plasma cholesterol has a specific activity which is much higher than the average for the whole cell.
Supplementary key words squalene mevalonic acid cholesterol exchange cholesteryl ester
Submitted on June 30, 1969
Revised on September 15, 1969
Accepted on November 12, 1969