Journal of Lipid Research, Vol 30, 317-322, Copyright © 1989 by Lipid Research, Inc.

ARTICLES

A bile alcohol sulfate as a major component in the bile of the small skate (Raja erinacea)

G Karlaganis, SE Bradley, JL Boyer, AK Batta, G Salen, B Egestad and J Sjovall
Department of Clinical Pharmacology, University of Berne, Switzerland.

The nature of bile alcohols and bile acids in gall-bladder and hepatic bile from perfused livers of the small skate (Raja erinacea) has been investigated. The main bile alcohol sulfate was isolated by thin-layer chromatography and analyzed by fast atom bombardment mass spectrometry and 13C NMR. Following solvolysis and purification on Lipidex-DEAP, the bile alcohol profile was measured by capillary gas-liquid chromatography-electron impact mass spectrometry. Based on these studies and on comparison with authentic scymmnol sulfate and scymnol, the main bile alcohol was identified as 5 beta-cholestane-3 alpha,7 alpha,12 alpha,24 xi,26,27-hexol sulfate. The mean +/- SD concentration in gallbladder bile from five different skates was 24.6 +/- 8.7 mmol/l. Only 0.1 mmol/l of cholic acid and its conjugates was found in a pool of skate bile. The main bile alcohol sulfate in the bile of the small skate seems to be a metabolic end product, present in a concentration comparable to that of bile salts in mammals.
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