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A motility test of leukocytes under agar
International Journal of Nuclear Medicine and Biology
|January 1, 1985
Summary
A novel leukocyte migration assay was developed for analyzing cell motility. This method, using stained agar plates and projection, accurately assesses spontaneous and directed migration, with potential applications in abscess localization studies.
Area of Science:
- Immunology
- Cell Biology
- Medical Diagnostics
Background:
- Leukocyte migration is crucial for immune response and inflammation.
- Accurate assessment of leukocyte motility is vital for understanding disease processes and evaluating therapeutic interventions.
- Existing methods for analyzing leukocyte migration can be time-consuming or require specialized equipment.
Purpose of the Study:
- To develop and validate a novel, efficient, and reproducible assay for quantifying leukocyte migration under agar.
- To establish a migration index for objective assessment of leukocyte motility.
- To evaluate the impact of cell-labeling agents on leukocyte migration for potential use in diagnostic imaging.
Main Methods:
- Development of an under-agar leukocyte migration assay using stained Blood Agar Base plates.
- Visualization of leukocyte migration via projection, obviating the need for light microscopy.
- Definition and calculation of a migration index to quantify motility.
- Assessment of the effect of indium-111 (111In) labeled cell-binding complexes (oxinate, tropolonate, pyrithionate) on leukocyte migration.
Main Results:
- Leukocytes demonstrated significant migration under anaerobic blood agar conditions.
- The developed assay showed good reproducibility, enabling paired comparisons of different leukocyte treatments.
- Cell-labelling complexes 111In-oxinate and 111In-tropolonate did not affect leukocyte migration at a concentration of 3.5 µg/mL.
- 111In-pyrithionate significantly impaired leukocyte motility.
Conclusions:
- A robust and reproducible under-agar leukocyte migration assay has been established.
- The assay allows for the assessment of both spontaneous and chemotactically directed leukocyte migration.
- The findings suggest that while some 111In-labeled agents are suitable for cell tracking, 111In-pyrithionate negatively impacts cell function, and the assay can be utilized for retrospective analysis in abscess localization studies.