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Characterization of mucin in the hepatic bile of patients with intrahepatic pigment stones

1992; Wiley; Volume: 7; Issue: 1 Linguagem: Inglês

10.1111/j.1440-1746.1992.tb00931.x

1440-1746

Toru Yamasaki, Fumio Nakayama, Shinri Tamura, Masahiko Endo,

Gallbladder and Bile Duct Disorders

ABSTRACT To investigate the relationship between biliary mucin and ductular stone formation, mucin was isolated from hepatic bile using gel filtration on Sepharose CL‐4B. The bile was obtained from 14 patients with stones in various sites of the biliary tract. The hexose content in the excluded fraction was significantly higher in patients with intrahepatic ductular stones (68.7 ± 20.5μg/mL; mean ± s.d.) than in those with gall‐bladder stones or extrahepatic ductular stones (23.8 ± 8.1 μg/mL, 33.3 ± 9.5 μg/mL; P < 0.05), suggesting a higher concentration of mucin in the bile of patients with intrahepatic ductular stones. Ion‐exchange chromatography on DEAE‐Sephacel showed that most mucin from each material was negatively charged and electrophoretic studies indicated that it was composed mainly of high molecular weight (> 10 6 ), sulfated glycoprotein. These results suggested that the mucin content of hepatic bile might have an important relation to the development of intrahepatic ductular stones.