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Related Experiment Videos

A screening test for phosphoglycerate kinase deficiency

G Vaca, C Wunsch, C Medina

    Annales De Genetique
    |January 1, 1981
    PubMed
    Summary
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    A new screening test detects phosphoglycerate kinase (PGK) deficiency, a cause of hemolytic anemia. This simple blood test visually estimates PGK enzyme activity using fluorescence, aiding diagnosis in males.

    Area of Science:

    • Biochemistry
    • Genetics
    • Hematology

    Background:

    • Phosphoglycerate kinase (PGK) deficiency is an X-linked recessive disorder.
    • This deficiency can lead to hereditary hemolytic anemia, particularly in males.
    • Accurate and simple diagnostic methods are crucial for affected individuals.

    Purpose of the Study:

    • To describe a simple screening test for detecting X-linked recessive phosphoglycerate kinase (PGK) deficiency in blood.
    • To evaluate the utility of this test for studying males with hereditary hemolytic anemia.

    Main Methods:

    • The test utilizes the conversion of 3-phosphoglycerate to 1,3-diphosphoglycerate catalyzed by PGK.
    • Enzyme activity is visually estimated by monitoring NADH oxidation to NAD+ in a coupled reaction.

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  • The reaction involves glyceraldehyde 3-phosphate dehydrogenase, with fluorescence changes indicating PGK activity.

    • Main Results:

    • A decrease in fluorescence signifies normal PGK activity.
    • The absence or minimal change in fluorescence suggests PGK deficiency.
    • The test provides a visual estimation of enzyme activity.

    Conclusions:

    • This simple screening test is effective for detecting PGK deficiency in blood samples.
    • The test is valuable for the diagnosis and study of males with hereditary hemolytic anemia due to PGK deficiency.