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    Area of Science:

    • Cell Biology
    • Biophysics
    • Theoretical Biology

    Background:

    • Galvanotaxis, or directed cell migration in electric fields, is driven by molecular redistribution (sensors) via electrophoresis and electroosmosis.
    • Previous models focused on sensor stochasticity, lacking consideration for cell geometry.

    Purpose of the Study:

    • To update galvanotaxis models by incorporating cell shape and orientation effects on electric field sensing.
    • To investigate how cell geometry influences information acquisition about electric field direction.

    Main Methods:

    • Computational modeling of galvanotaxis.
    • Calculation of Fisher information to quantify directional sensing.
    • Analysis of sensor redistribution models and their impact on cell elongation.

    Main Results:

    • Cell orientation relative to the electric field impacts information gain about field direction.
    • For weak fields, perpendicular cell orientation may yield less variable direction estimation.
    • A 'vector sum' cueing mechanism introduces bias towards the cell's short axis.

    Conclusions:

    • Cell shape and orientation are critical factors modulating galvanotaxis efficiency and accuracy.
    • The model explains how sensor redistribution can lead to observed cell elongation patterns, either parallel or perpendicular to the electric field.