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Related Experiment Videos

[Various forms of cystathioninuria]

W Endres

    Fortschritte Der Medizin
    |March 18, 1982
    PubMed
    Summary

    Elevated urinary cystathionine in children can indicate enzyme defects or conditions like neuroblastoma. Pyridoxine treatment helped reduce cystathionine levels in premature infants, suggesting a role for this vitamin.

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    Area of Science:

    • Biochemistry
    • Pediatrics
    • Medical Genetics

    Context:

    • Cystathionine is a key intermediate in methionine metabolism.
    • Renal cystathionine excretion is a marker for metabolic health in children.
    • Abnormal levels can be linked to various pediatric conditions.

    Purpose:

    • To establish baseline renal cystathionine excretion in healthy children.
    • To investigate the causes and implications of pathologically increased urinary cystathionine.
    • To explore the therapeutic effect of pyridoxine on cystathioninuria.

    Summary:

    • Isolation and identification of cystathionine enabled the determination of renal excretion in healthy children.
    • Pathological urinary cystathionine levels may signal inherited enzyme defects, impaired adaptation in premature infants, or secondary conditions like neuroblastoma and liver disorders.
    • Pyridoxine dependency was identified in a child with primary cystathioninuria, and treatment with pyridoxine reduced urinary cystathionine in premature newborns.

    Impact:

    • Provides diagnostic insights into inherited metabolic disorders and secondary conditions in pediatrics.
    • Highlights the potential role of pyridoxine in managing cystathioninuria, particularly in premature infants.
    • Establishes reference ranges for urinary cystathionine, aiding in the diagnosis of various pediatric diseases.

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