[Age dependence of beta-lipoproteins in comparison with cholesterol and triglycerides in the serum of SPF rats].

Age-dependency of beta-Lipoproteins as Compared to Cholesterol and Triglycerides in the Serum of SPF Rats Total cholesterol and triglyceride values increase with age in rats (male greater than female). Correlated to these lipid increases, an increase of serum turbidity and of total beta-lipoproteins (pre-beta- and beta) can also be observed. The results of gel-electrophoretic separation show far greater pre-beta- and beta-lipoprotein increases than alpha-lipoprotein increases in aging animals. It can therefore be concluded that the relative decrease in alpha-lipoproteins is primarily caused by a more rapid increase of pre-beta-and beta-lipoproteins.