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Related Experiment Videos

Uridine diphosphate galactose 4-epimerase deficiency

K Oyanagi, F Nakata, S Hirano

    European Journal of Pediatrics
    |February 1, 1981
    PubMed
    Summary

    Newborn screening identified a rare uridine diphosphate galactose (UDP-Gal) 4-epimerase deficiency. Affected individuals show low red blood cell enzyme activity, distinct from normal liver enzyme levels.

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    Area of Science:

    • Biochemistry
    • Genetics
    • Metabolic Disorders

    Background:

    • Uridine diphosphate galactose (UDP-Gal) 4-epimerase is a crucial enzyme in carbohydrate metabolism.
    • Congenital disorders of glycosylation (CDGs) represent a growing group of inherited metabolic diseases.
    • Newborn screening programs are vital for early detection of metabolic disorders.

    Observation:

    • A case of UDP-Gal 4-epimerase deficiency was identified through newborn infant mass screening.
    • Red blood cells from the patient exhibited significantly reduced UDP-Gal 4-epimerase activity (7.5% of normal).
    • Parents displayed intermediate enzyme activity levels, suggesting a heterozygous carrier state.

    Findings:

    • Enzyme activity in liver tissue from the patient was within the normal range.

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  • Two additional families were identified via mass screening, revealing heterozygotes for the condition.
  • This highlights tissue-specific differences in enzyme expression or activity.

    • Implications:

    • Early diagnosis of UDP-Gal 4-epimerase deficiency through newborn screening enables timely intervention.
    • Understanding the genetic basis and carrier status is crucial for genetic counseling.
    • Further research into the clinical manifestations and long-term outcomes of this deficiency is warranted.