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Platelets and diabetic vascular disease.

R C Paton, P Passa

    Diabete & Metabolisme
    |December 1, 1983
    PubMed
    Summary

    Platelet abnormalities are common in diabetes, but their role in microangiopathy is unclear. Improved blood sugar control can reverse some platelet changes, suggesting they may be secondary to vessel damage.

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    Area of Science:

    • Cardiovascular Research
    • Diabetology
    • Hematology

    Background:

    • Platelet behavior abnormalities, including aggregation and retention, are frequently observed in diabetic patients, especially those with vascular disease.
    • This has led to the hypothesis that platelet hyper-reactivity contributes to diabetic microangiopathy.
    • While platelets are implicated in atherosclerosis, direct evidence for their role in microangiopathy is limited.

    Purpose of the Study:

    • To investigate the role of platelet behavior abnormalities in the pathogenesis of diabetic microangiopathy.
    • To explore whether observed platelet changes are a cause or consequence of diabetic vascular complications.
    • To assess the impact of glycemic control on platelet function in diabetic patients.

    Main Methods:

    • In vitro tests of platelet aggregation and retention.
    • In vivo tests including platelet survival time and plasma beta-thromboglobulin levels.
    • Analysis of platelet behavior in diabetic patients compared to other conditions with vessel wall damage.

    Main Results:

    • Platelet behavior tests were frequently abnormal in diabetic patients with vascular disease.
    • Similar platelet alterations were noted in other conditions associated with vessel wall injury, suggesting a secondary role.
    • Some platelet function changes in diabetics were reversed with improved glycemic control.

    Conclusions:

    • Evidence for direct platelet involvement in diabetic microangiopathy remains circumstantial.
    • Platelet abnormalities may be secondary to underlying vessel wall injury in diabetes.
    • Ongoing trials of anti-platelet agents are expected to provide further clarity on the role of platelets in diabetic vascular complications.

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