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Related Experiment Videos

Platelet function in hairy-cell leukaemia.

M Zuzel, J C Cawley, R C Paton

    Journal of Clinical Pathology
    |August 1, 1979
    PubMed
    Summary
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    Platelet aggregation and granular storage are impaired in hairy-cell leukemia (HCL), suggesting a storage pool defect (SPD) contributes to platelet dysfunction in HCL patients.

    Area of Science:

    • Hematology
    • Oncology
    • Platelet Biology

    Background:

    • Hairy-cell leukemia (HCL) is a rare B-cell malignancy.
    • Platelet dysfunction can occur in patients with HCL, but its underlying mechanisms are not fully understood.

    Purpose of the Study:

    • To quantitatively assess various aspects of platelet function in patients with HCL.
    • To investigate the relationship between platelet defects and clinical hemostasis in HCL.

    Main Methods:

    • Quantitative analysis of platelet aggregation in response to multiple agonists (ADP, adrenaline, collagen, thrombin, ristocetin).
    • Measurement of granular storage capacity for {(14)C} 5-HT.
    • Assessment of bleeding times and correlation with platelet function parameters.

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    Main Results:

    • Reduced platelet aggregation observed in at least two of eight HCL patients.
    • Diminished {(14)C} 5-HT storage capacity found in five of six patients.
    • Abnormal aggregation correlated with reduced storage pool and prolonged bleeding times, but no clinical hemostatic defect was noted.

    Conclusions:

    • A platelet storage pool defect (SPD) is likely responsible for aggregation abnormalities in HCL.
    • The platelet defect in HCL is probably due to abnormal platelet production secondary to marrow infiltration by hairy cells, rather than acquired factors.