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Senescent cell differentiation antigen.

M M Kay

    Progress in Clinical and Biological Research
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Senescent cell antigen, a marker of cell aging, is found on damaged cells. This antigen triggers immune responses for cell removal by macrophages, and it originates from the band 3 protein.

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    Area of Science:

    • Cell biology
    • Immunology
    • Biochemistry

    Background:

    • Senescent cells and damaged cells express a unique surface antigen.
    • This antigen plays a role in the body's natural immune surveillance and clearance mechanisms.
    • The origin and identity of this antigen are not fully understood.

    Purpose of the Study:

    • To identify the senescent cell antigen.
    • To investigate the origin and characteristics of the senescent cell antigen.
    • To understand the role of the senescent cell antigen in cellular processes.

    Main Methods:

    • Immunological assays to detect the antigen.
    • Protein analysis to identify the antigen's source.
    • Cell membrane studies to confirm antigen presence.

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    Main Results:

    • The senescent cell antigen appears on senescent and damaged cells.
    • This antigen binding by IgG autoantibodies leads to macrophage-mediated cell removal.
    • The senescent cell antigen is derived from band 3, a major erythrocyte anion transporter.
    • Both senescent cell antigen and band 3 are present in all examined cell membranes.

    Conclusions:

    • The senescent cell antigen is a key marker for identifying and clearing senescent and damaged cells.
    • The band 3 protein is the precursor to the senescent cell antigen.
    • This antigen-mediated process is crucial for tissue homeostasis and immune function.