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Related Experiment Videos

Deae-dextran and T-cell rosette formation.

M Menon, S S Stefani

    Immunological Communications
    |January 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    DEAE-dextran stabilizes T-cell rosettes, speeding up formation from 24 hours to 1 hour. However, its use is not recommended in clinical immunology due to inconsistent results in patient samples.

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    Area of Science:

    • Immunology
    • Cell Biology

    Background:

    • Rosette formation between sheep red blood cells and human lymphocytes is a method for identifying T-cells.
    • Traditional rosette formation requires prolonged incubation periods (18-24 hours).

    Purpose of the Study:

    • To investigate the effect of DEAE-dextran on the formation and stability of T-cell rosettes.
    • To determine the specificity of DEAE-dextran-mediated rosette formation for T-cells.

    Main Methods:

    • Incubation of human peripheral blood lymphocytes with sheep red blood cells in the presence of DEAE-dextran.
    • Assessment of rosette formation and stability after one hour of incubation at 4°C.
    • Analysis to rule out non-specific cell aggregation (co-rosetting).

    Main Results:

    Related Experiment Videos

    • DEAE-dextran significantly increased and stabilized T-cell rosettes.
    • Reproducible rosettes were formed within one hour, a substantial reduction from the standard 18-24 hours.
    • Rosette formation was confirmed to be specific for T-cells, excluding co-rosetting.
    • Increased rosette formation was consistently observed only in normal control cells.

    Conclusions:

    • DEAE-dextran acts as an effective stabilizer and enhancer for T-cell rosette formation.
    • The method significantly reduces the time required for rosette identification.
    • Routine clinical immunology use of DEAE-dextran is not advised due to observed inconsistencies in patient samples.