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beta 2-Microglobulin secretion from lymphoid cells: a study at the cellular level.

L Hammarström, C I Smith

    Medical Microbiology and Immunology
    |January 1, 1985
    PubMed
    Summary

    A new protein plaque assay detects human lymphocytes secreting beta 2-microglobulin. Both T- and B-cells secrete this protein, correlating with DNA synthesis, challenging previous assumptions about restricted secretion.

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    Area of Science:

    • Immunology
    • Cell Biology

    Background:

    • Beta 2-microglobulin is a protein found on the surface of most nucleated cells.
    • Its secretion is thought to be restricted to specific lymphoid cell subpopulations.

    Purpose of the Study:

    • To develop a novel protein plaque assay for detecting human lymphocytes that secrete beta 2-microglobulin.
    • To investigate the cellular distribution of beta 2-microglobulin secretion in lymphocytes.

    Main Methods:

    • Development of a protein plaque assay.
    • Detection of beta 2-microglobulin secretion by human lymphocytes.
    • Correlation analysis with DNA synthesis and immunoglobulin secretion.

    Main Results:

    • The assay requires a secretion rate exceeding 25 molecules per second for plaque formation.

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  • Both T-cells and B-cells were observed to form plaques after activation.
  • A strong correlation was found between beta 2-microglobulin production and DNA synthesis.
  • Immunoglobulin secretion did not correlate with beta 2-microglobulin secretion.

    • Conclusions:

    • The developed plaque assay effectively detects beta 2-microglobulin secretion in human lymphocytes.
    • Beta 2-microglobulin secretion is not restricted to specific subpopulations, as both T- and B-cells can secrete it upon activation.
    • Beta 2-microglobulin secretion is closely linked to cellular proliferation, indicated by its correlation with DNA synthesis.