Increased cholesterol absorption by hyperlipidemia atherosclerosis prone (LAP) Japanese quail

Abstract

The present study describes the cholesterol absorption by hyperlipidemia atherosclerosis prone (LAP) Japanese quail to address their high susceptibility to experimental atherosclerosis. The apparent cholesterol absorption rate of LAP quail was compared with that of commercially available (CA) Japanese quail. After 14 d of cholesterol feeding by gavage, it was found that the cholesterol excretion of LAP quail was significantly lower than that of CA quail. The fecal excretion of bile acid and fat showed a similar tendency to that as shown with the case of cholesterol. The cholesterol feeding only increased the serum cholesterol level of LAP quail, and this trend holds true for the liver lipid concentration. The expression level of liver cholesterol 7 α-hydroxylase mRNA showed no difference between LAP and CA strains under the conditions of cholesterol loading. These results showed that the cholesterol absorption by LAP quail is significantly higher than that by CA quail, which may reasonably explain the higher susceptibility of this strain to experimental atherosclerosis.