Abstract:
:When rabbits are fed a cholesterol-rich diet they accumulate beta-migrating very low density lipoprotein (beta-VLDL) in their plasma. beta-VLDL are cholesteryl ester-rich lipoproteins which contain apolipoproteins B and E. There are 2 forms of apolipoprotein B in beta-VLDL. About 90% of apolipoprotein B is present as a 320 000-dalton protein and the remainder is present as a 210 000-dalton protein. These apolipoproteins are tissue specific. Lipoproteins secreted by perfused rabbit livers contain only the 320 000-dalton apolipoprotein B while lipoproteins secreted by the intestine contain only the 210 000-dalton apolipoprotein B. The tissue specificity of apolipoprotein B shows that beta-VLDL is largely of hepatic origin and that only a small fraction is of intestinal origin. The composition of VLDL secreted from the livers of cholesterol-fed rabbits is similar to that of plasma beta-VLDL. Both are cholesteryl ester-rich, in contrast to plasma and perfusate VLDL from normal rabbits which are both triglyceride-rich. This indicates that the cholesteryl ester-rich hepatic VLDL is a direct precursor for plasma beta-VLDL.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Kroon PA,Thompson GM,Chao YSdoi
10.1016/0021-9150(85)90007-3subject
Has Abstractpub_date
1985-09-01 00:00:00pages
323-9issue
3eissn
0021-9150issn
1879-1484pii
0021-9150(85)90007-3journal_volume
56pub_type
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