Title : Differential feedback regulation of cholesterol 7 alpha-hydroxylase mRNA and transcriptional activity by rat bile acids in primary monolayer cultures of rat hepatocytes.

Pub. Date : 1993 Mar 15

PMID : 8457195






5 Functional Relationships(s)
Download
Sentence
Compound Name
Protein Name
Organism
1 Addition of taurocholic acid, the most predominant bile acid in rat bile, to the culture medium suppressed cholesterol 7 alpha-hydroxylase activity and mRNA time- and dose-dependently. Taurocholic Acid cytochrome P450 family 7 subfamily A member 1 Rattus norvegicus
2 Maximal suppression of cholesterol 7 alpha-hydroxylase mRNA (-91%) and enzyme activity (-89%) was observed after a 16 h incubation period with 50 microM taurocholic acid. Taurocholic Acid cytochrome P450 family 7 subfamily A member 1 Rattus norvegicus
3 Mass production of bile acids (chenodeoxycholic acid and beta-muricholic acid) was inhibited to a similar extent as the cholesterol 7 alpha-hydroxylase when different concentrations of taurocholic acid were used, giving maximal inhibition (-81%) at 50 microM taurocholic acid. Taurocholic Acid cytochrome P450 family 7 subfamily A member 1 Rattus norvegicus
4 Mass production of bile acids (chenodeoxycholic acid and beta-muricholic acid) was inhibited to a similar extent as the cholesterol 7 alpha-hydroxylase when different concentrations of taurocholic acid were used, giving maximal inhibition (-81%) at 50 microM taurocholic acid. Taurocholic Acid cytochrome P450 family 7 subfamily A member 1 Rattus norvegicus
5 Glycocholic acid and unconjugated cholic acid were equally effective as taurocholic acid in suppressing cholesterol 7 alpha-hydroxylase mRNA. Taurocholic Acid cytochrome P450 family 7 subfamily A member 1 Rattus norvegicus