Cholesterol gallstone induction in hamsters reflects strain differences in plasma lipoproteins and bile acid profiles |
| |
Authors: | Eike A Trautwein Jinsheng Liang K C Hayes |
| |
Affiliation: | (1) Foster Biomedical Research Laboratory, Brandeis University, 02254 Waltham, Massachusetts |
| |
Abstract: | Because different strains of hamsters vary in their susceptibility to gallstones, the relationship between plasma lipoproteins,
hepatic cholesterol, bile lipids and bile acid profile was examined during gallstone induction in strains of male Syrian hamsters
from Charles River Lakeview (CHR), Biobreeder F1B (BIO) and Harlan Sprague-Dawley (HAR). Gallstones were induced by feeding a purified diet containing 0.4 or 0.8% cholesterol
for 5 wk. Basal plasma total cholesterol was similar, but the hypercholesterolemia induced by dietary challenge was significantly
lower in CHR than in HAR and BIO hamsters. Cholesterol-fed CHR hamsters transported cholesterol mainly in HDL (47%), whereas
VLDL-C+IDL-C predominated in BIO and HAR hamsters, and their HDL transported only 28 and 38%, respectively. HAR hamsters accumulated
the most hepatic cholesterol, revealed the highest cholate/cheno ratio, the lowest glycine/taurine ratio and hydrophobicity
index. HAR also developed the fewest cholesterol gallstones (23%), while 64% of CHR and 58% of BIO hamsters had cholesterol
gallstones and 34% of BIO hamsters developed pigment stones. Doubling dietary cholesterol from 0.4 to 0.8% doubled the incidence
of cholesterol gallstones but exerted minimal impact on other parameters compared to strain differences. Thus, different strains
of hamsters vary considerably with respect to biliary cholesterol, bile acid profile and formation of cholesterol gallstones
associated with differences in plasma lipoprotein profiles. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|