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Quantitative methods for scoring cell migration and invasion in filter-based assays

D Muir1, L Sukhu, J Johnson

  • 1Department of Pediatrics, University of Florida College of Medicine, Gainesville 32610.

Analytical Biochemistry
|November 15, 1993
PubMed
Summary

Two new methods, colorimetric and radiolabel assays, offer efficient, semiautomated scoring for cell migration and invasion studies. These techniques improve upon traditional visual counting for more reliable cell assessment in filter-based assays.

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Area of Science:

  • Cell biology
  • Cancer research
  • Assay development

Background:

  • Filter-based assays are crucial for studying cell chemoattraction, migration, and invasion.
  • Traditional visual counting of cells in these assays is laborious, time-consuming, and potentially unreliable.
  • Accurate quantification of cell migration and invasion is essential for understanding tumor cell behavior.

Purpose of the Study:

  • To develop and compare two novel methods for scoring cell numbers in filter-based assays: a colorimetric assay and a radioassay.
  • To evaluate the sensitivity, variability, ease of use, efficiency, and suitability of these methods for cell migration and invasion studies.
  • To provide reliable and efficient semiautomated alternatives to manual cell counting.

Main Methods:

  • Development of a colorimetric assay utilizing toluidine blue binding.

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  • Development of a radioassay involving prelabeling cells with [3H]thymidine.
  • Comparative evaluation of both methods against traditional visual counting for accuracy and efficiency.

    • Main Results:

    • The radiolabeling method demonstrated high sensitivity, reliability, and superior efficiency.
    • The colorimetric dye method provided a rapid, reliable, nonradioactive alternative, preserving cultures for further analysis.
    • Both colorimetric and radiolabel scoring methods proved to be reliable and efficient semiautomated techniques.

    Conclusions:

    • Colorimetric and radiolabel scoring are effective semiautomated methods for filter-based cell migration and invasion assays.
    • These methods offer significant improvements in efficiency and reliability over manual counting.
    • The choice between methods depends on specific assay requirements, balancing sensitivity, radioactivity, and preservation of cell cultures.