Abstract:
:The purpose of the present study was to investigate the physiological control of the main regulatory enzymes of cholesterol metabolism in isolated enterocytes obtained from chick duodenum, jejunum and ileum. Cholesterol feeding resulted in an inhibition of 3-hydroxy-3-methyl-glutaryl-CoA reductase and mevalonate 5-pyrophosphate decarboxylase, while cholestyramine feeding increased reductase activity in all the regions studied and decarboxylase activity only in duodenum. Cholesterol feeding markedly increased acyl-CoA:cholesterol acyltransferase, but the effects of cholestyramine were less clear. The effects on transferase activity cannot be due to differences in the availability of acyl-CoA as exogenous substrate as no significant differences were found in acyl-CoA hydrolase activity after any of the dietary treatments. The effects of cholesterol feeding were related to changes in the cholesterol content of epithelial cells, whereas in the case of cholestyramine this relationship was less apparent.
journal_name
Lipidsjournal_title
Lipidsauthors
Iglesias J,Gonzalez-Pacanowska D,Marco C,Garcia-Peregrin Edoi
10.1007/BF02536087subject
Has Abstractpub_date
1993-06-01 00:00:00pages
549-53issue
6eissn
0024-4201issn
1558-9307journal_volume
28pub_type
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