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Abnormal platelet function in Chediak-Higashi syndrome.

G J Boxer, H Holmsen, L Robkin

    British Journal of Haematology
    |April 1, 1977
    PubMed
    Summary
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    Infants with Chediak-Higashi syndrome may have platelet storage pool disease, affecting platelet function. Ascorbate treatment did not improve these abnormal platelet functions in the studied infant.

    Area of Science:

    • Hematology
    • Genetics
    • Biochemistry

    Background:

    • Chediak-Higashi (C-H) syndrome is a rare genetic disorder.
    • Platelet dysfunction can occur in C-H syndrome, but is not fully understood.

    Observation:

    • Platelets from an infant with C-H syndrome, without bleeding issues or accelerated phase, exhibited storage pool disorder characteristics.
    • Abnormalities included impaired aggregation, reduced serotonin and nucleotide storage/release, and altered calcium content.

    Findings:

    • Platelet adenine nucleotide metabolism and [14C]adenine incorporation were largely normal.
    • Mild impairment in nucleotide conversion to hypoxanthine was noted.
    • Elevated platelet cyclic-AMP (c-AMP) normalized after ascorbate treatment, but platelet function remained abnormal, indicating c-AMP is not solely responsible.

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    Implications:

    • This study highlights platelet storage pool disorder as a potential, often subclinical, manifestation of C-H syndrome.
    • Findings suggest that abnormal platelet function in C-H syndrome is multifactorial and not solely driven by elevated c-AMP levels.
    • Further research is needed to elucidate the precise mechanisms underlying platelet dysfunction in C-H syndrome.