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Related Experiment Videos

Optimal efficiency of human platelet shape changes.

D Dubler, D A Deranleau, E F Lüscher

    Haemostasis
    |January 1, 1983
    PubMed
    Summary

    Platelets change shape efficiently at 37°C when stimulated by ADP. Temperature affects platelet shape change rates and final morphology, with optimal discoid platelet shape at 37°C.

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    Area of Science:

    • Biophysics
    • Hematology
    • Cell Biology

    Background:

    • Platelets are crucial for hemostasis and thrombosis.
    • Adenosine diphosphate (ADP) is a key platelet activator.
    • Platelet shape change is a fundamental response to activation.

    Purpose of the Study:

    • To investigate the effect of temperature on ADP-induced platelet shape changes.
    • To compare kinetic rate constants and light scattering properties at different temperatures.
    • To determine the optimal temperature for platelet shape transformation.

    Main Methods:

    • Light scattering extinction coefficients were measured.
    • Kinetic rate constants for shape changes were determined.
    • Platelet shape changes were analyzed at 31°C, 37°C, and 41°C.

    Main Results:

    • Platelets showed optimal efficiency in shape change at 37°C.
    • Temperature significantly influenced the rates of disc-to-sphere and sphere-to-spiny sphere transformations.
    • Unstimulated platelets were flatter at 37°C; pseudopodia were more prominent at 41°C.

    Conclusions:

    • 37°C is the optimal temperature for ADP-induced platelet shape changes.
    • Deviations from 37°C impair the disc-to-sphere reaction.
    • Temperature influences platelet morphology and activation dynamics.

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