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Related Experiment Videos

Relation between stimulus intensity and neutrophil chemotactic response

H U Keller, J H Wissler, M W Hess

    Experientia
    |April 15, 1977
    PubMed
    Summary

    Neutrophil responses to chemotactic peptides follow a logarithmic or power function, indicating a consistent relationship between stimulus intensity and cell movement. This suggests a fundamental law governing cell migration in response to chemical signals.

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    Area of Science:

    • Immunology
    • Cell Biology
    • Biophysics

    Background:

    • Chemotaxis is crucial for immune cell function.
    • Understanding neutrophil chemotaxis aids in studying inflammatory and immune responses.
    • Previous research has explored various factors influencing leukocyte migration.

    Purpose of the Study:

    • To investigate the quantitative relationship between chemotactic peptide concentration and neutrophil migration.
    • To determine if established psychophysical laws apply to cellular responses.
    • To explore the significance of Weber-Fechner's law in leukocyte chemotaxis.

    Main Methods:

    • Utilizing chemotactic peptides lacking chemokinetic activity.
    • Measuring neutrophil response to varying peptide concentrations.

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  • Analyzing the dose-response relationship using logarithmic and power functions.

    • Main Results:

    • Neutrophil response is proportional to the logarithm of stimulus intensity.
    • Alternatively, response follows a power function with an exponent of 0.3.
    • Equal responses correlate with equal ratios of peptide concentration to threshold concentration.

    Conclusions:

    • Leukocyte chemotaxis adheres to principles similar to sensory perception, specifically Weber-Fechner's law.
    • The findings provide a quantitative framework for understanding neutrophil migration.
    • This research offers insights into the fundamental mechanisms of cell movement in response to chemical gradients.