Sulfated bile acids in serum,bile, and urine of cirrhotic patients before and after portacaval anastomosis

Sulfated and unsulfated bile acid composition was studied in serum and bile in 10 patients with alcoholic cirrhosis. Samples, collected before and 2 months after portacaval anastomosis, were analyzed using a gaschromatographic method. Mean total serum bile acid levels rose from 32.0±5.3(SE) mol/liter before to 87.4±13.3 mol/liter after surgery (P<0.005). The increase in serum bile acid levels was significant only with respect to the unsulfated fraction (22.7±3.0 mol/liter to 67.6±8.1 mol/liter,P<0.005). Thus the percent sulfation of total serum bile acid decreased from 24.6% to 19.2%. The sulfated bile acid fraction comprised mainly chenodeoxycholate both before and after surgery. Percent sulfation of individual bile acids was not modified after portacaval anastomosis. Bile acid sulfates were present in bile only in negligible amounts. The daily uninary excretion of bile acids, studied in 6 patients, increased significantly (P<0.05) after surgery, the increase being due only to the unsulfated compounds. Data from this study indicate that in cirrhotic patients no significant changes occur in serum with respect to sulfated bile acids after portacaval anastomosis, despite a definite increase in serum unsulfated bile acid levels. This is likely due to the lack of an efficient enterohepatic circulation of bile acid sulfates.Supported by grant 900.3/0sp.70/206/100, Divisione III, Ministero della Sanità.