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Related Experiment Videos

A quantitative lymphocyte localization assay.

P Borgs, J B Hay

    Journal of Leukocyte Biology
    |March 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Researchers tracked radiolabeled lymphocytes in sheep skin lesions, finding high radioactivity accumulation in lesions but not normal skin. This method enables future studies on lymphocyte traffic dynamics.

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    Area of Science:

    • Immunology
    • Dermatology
    • Radiochemistry

    Background:

    • Investigating lymphocyte trafficking is crucial for understanding immune responses in skin conditions.
    • Previous methods lacked the precision to quantify cell migration to specific skin sites.

    Purpose of the Study:

    • To develop and validate a method for tracking lymphocyte migration to induced skin lesions in vivo.
    • To quantify the accumulation of radiolabeled lymphocytes in experimental skin lesions.

    Main Methods:

    • Induction of multiple skin lesions in sheep using allogeneic lymphocytes or tuberculin.
    • Isolation, radiolabeling (with 111-indium) of lymphocytes from lymph nodes.
    • Intravenous re-infusion of labeled cells and subsequent quantification of radioactivity in lesions and tissues using gamma spectrometry.

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    Main Results:

    • Significant accumulation of radiolabeled lymphocytes (up to 38,000 cpm/lesion) was observed in skin lesions.
    • Minimal radioactivity was detected in normal skin sites (few hundred cpm).
    • Dose-response and time kinetics of cell accumulation were demonstrated, with negligible cell-free radioactivity.

    Conclusions:

    • The developed method accurately quantifies lymphocyte traffic to skin lesions.
    • This technique provides a robust platform for future studies on immune cell dynamics in skin.
    • Enables research into the induction, promotion, and suppression of lymphocyte migration in vivo.