Bile acid metabolism in hypothyroid subjects: response to substitution therapy.

Abstract:

:Bile acid kinetics and biliary lipid composition were determined in ten hypothyroid patients before and after treatment with L-thyroxine. Hypothyroid patients had normal synthesis rates of cholic acid and chenodeoxycholic acid. Hormone treatment, which lowered plasma cholesterol by about 35%, stimulated the formation of chenodeoxycholic acid by about 40% but did not significantly change the synthesis of cholic acid or total primary bile acids. The mean relative biliary concentration of deoxycholic acid was decreased from 30% to 19% and that of chenodeoxycholic acid was concomitantly increased. Cholesterol saturation of bile was decreased by treatment in six of the patients, but the mean value before treatment (135 +/- 13%) was not significantly different from that obtained after treatment (108 +/- 9%). It is suggested that the hypocholesterolaemic effect of thyroid hormones is not primarily due to an increased degradation of cholesterol to bile acids. Similar to what is observed in heterozygous familial hypercholesterolaemia, the defective receptor mediated degradation of plasma low density lipoproteins in hypothyroidism is thus apparently associated with a quantitatively normal catabolic rate of cholesterol to bile acids.

journal_name

Eur J Clin Invest

authors

Angelin B,Einarsson K,Leijd B

doi

10.1111/j.1365-2362.1983.tb00071.x

subject

Has Abstract

pub_date

1983-02-01 00:00:00

pages

99-106

issue

1

eissn

0014-2972

issn

1365-2362

journal_volume

13

pub_type

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