title: Biotinidase activity in patients with liver disease.
abstract: To investigate whether biotinidase deficiency may occur in liver disease, we determined biotinidase activity, biotin levels, and organic acids in patients with liver disease. Serum biotinidase activity in patients with liver disease (2.63 +/- 1.40 nmol/min/ml) was significantly lower than in the control group (5.43 +/- 1.06 nmol/min/ml). Serum biotinidase activity in decompensated liver cirrhosis (LC) and hepatoma was significantly lower than in acute viral hepatitis (AVH), chronic viral hepatitis (CVH), and compensated LC. The mean serum level of biotin in decompensated LC (1.8 +/- 0.6 microgram/ml) and hepatoma (1.7 +/- 0.8 microgram/ml) was significantly lower than in the control group (2.5 +/- 1.0 microgram/ml), and urinary excretion of biotin was increased in patients with liver disease, particularly in decompensated LC. Biotinidase activity correlated positively with serum biotin level and correlated negatively with urinary biotin level. Moreover, in four of five patients with severe liver disease the excretion of propionate, lactate, and 3-hydroxybutyrate decreased after biotin supplementation. The data for patients with severe liver disease so resembled those for late-onset multiple carboxylase deficiency that biotinidase deficiency is likely in patients with severe liver disease.
authors.affiliation: First Dept. of Internal Medicine, Gunma University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nagamine
authors.forename: S
authors.initials: S
authors.lastname: Saito
authors.forename: S
authors.initials: S
authors.lastname: Yamada
authors.forename: T
authors.initials: T
authors.lastname: Arai
authors.forename: K
authors.initials: K
authors.lastname: Takehara
authors.forename: T
authors.initials: T
authors.lastname: Fukui
mesh_terms: D020155:3-Hydroxybutyric Acid; D000208:Acute Disease; D000328:Adult; D000368:Aged; D000581:Amidohydrolases / Q000097:blood / Q000187:drug effects / Q000378:metabolism*; D001710:Biotin / Q000097:blood / Q000494:pharmacology / Q000652:urine; D043523:Biotinidase; D006528:Carcinoma, Hepatocellular / Q000378:metabolism; D005260:Female; D006519:Hepatitis, Alcoholic / Q000378:metabolism; D006525:Hepatitis, Viral, Human / Q000378:metabolism; D006801:Humans; D006885:Hydroxybutyrates / Q000652:urine; D007773:Lactates / Q000652:urine; D019344:Lactic Acid; D008103:Liver Cirrhosis / Q000378:metabolism; D008107:Liver Diseases / Q000201:enzymology* / Q000378:metabolism; D008113:Liver Neoplasms / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D011422:Propionates / Q000652:urine; D012720:Severity of Illness Index; D013997:Time Factors
chemical_list: D006885:Hydroxybutyrates; D007773:Lactates; D011422:Propionates; D019344:Lactic Acid; D001710:Biotin; D000581:Amidohydrolases; D043523:Biotinidase; D020155:3-Hydroxybutyric Acid