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    Clin Chem. 1979 Jul;25(7):1281-4.

    Urinary excretion of conjugated homovanillic acid, 3,4-dihydroxyphenylacetic acid, p-hydroxyphenylacetic acid, and vanillic acid by persons on their usual diet and patients with neuroblastoma.

    Muskiet FA, Groen A.

    Abstract

    We report quantitative data on beta-glucuronidase- and sulfatase-hydrolyzable conjugates of homovanillic acid, 3,4-dihydroxyphenylacetic acid, p-hydroxyphenylacetic acid, and vanillic acid in the urine of 20 apparently normal and healthy control persons and of three patients with neuroblastoma. We used organic solvent extraction and capillary gas chromatography. There was considerable person-to-person variation in the conjugation percentages calculated. Mean conjugated percentages of the four compounds for 16 normal healthy persons 2.5--40 years of age were, respectively, 12%, 33%, 14%, and 35%. For newborns and patients with neuroblastoma, these percentages were somewhat different. Increased amounts of vanillic acid were found in the urine of the patients with neuroblastoma, but results of a small metabolic study in rats suggest that this increase most probably is of dietary origin.

    PMID:
    455649
    [PubMed - indexed for MEDLINE]
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