[Effects of ethyl all-cis-5,8,11,14,17-icosapentaenoate on low density lipoprotein in rabbits].
The hypolipidemic effects of ethyl all-cis-5,8,11,14,17-icosapentaenoate (EPA-E) on cholesterol diet-fed rabbits were studied. EPA-E (300 mg/kg, p.o. x 4 weeks) decreased total cholesterols in the lipoprotein fractions of very low-density lipoprotein and intermediate lipoprotein+low-density lipoprotein (LDL), but not in high-density lipoprotein. Furthermore, the properties of LDL were investigated in rabbits given EPA-E (300 mg/kg, p.o. x 2 weeks). EPA-E had no influence on the lipid composition in LDL, and the cholesterol accumulation into macrophages was not increased by the incubation with EPA-E-treated LDL. However, the omega 3 polyunsaturated fatty acids contents of LDL were increased by the administration of EPA-E. EPA-E-treated LDL was also studied on the binding to the hepatic membranes. The binding of EPA-E-treated LDL to the hepatic membranes was higher than that of ordinary LDL. These results suggest that EPA-E causes a modification of LDL, such that EPA-E has an enhancing effect on the hepatic uptake of LDL. These effects may contribute to the hypolipidemic action of EPA-E.
Yano
T
T
Fuji Central Research Laboratory, Mochida Pharmaceutical Co., Ltd., Shizuoka, Japan.
Mizuguchi
K
K
Takasugi
K
K
Tanaka
Y
Y
Sato
M
M
D000818:Animals; D015118:Eicosapentaenoic Acid / Q000031:analogs & derivatives* / Q000494:pharmacology / Q000627:therapeutic use; D006949:Hyperlipidemias / Q000188:drug therapy; D008077:Lipoproteins, LDL / Q000187:drug effects* / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D008297:Male; D051379:Mice; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology* / Q000627:therapeutic use; D011817:Rabbits
D008077:Lipoproteins, LDL; D010975:Platelet Aggregation Inhibitors; C035276:eicosapentaenoic acid ethyl ester; D015118:Eicosapentaenoic Acid