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High-Content Screening Assay for the Identification of Antibody-Dependent Cellular Cytotoxicity Modifying Compounds
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Complement-Dependent Cytotoxicity Assay

Thomas D Duensing, Susan R Watson

    Cold Spring Harbor Protocols
    |February 14, 2018
    PubMed

    Insights

    Therapeutic antibodies can eliminate target cells through various mechanisms like apoptosis and complement-dependent cytotoxicity. High-throughput assays enable rapid characterization of antibody candidates for drug development.

    Area of Science:

    • Immunology and Pharmacology
    • Biotechnology and Drug Discovery

    Background:

    • Therapeutic antibodies offer targeted cell elimination, a crucial feature for drug efficacy.
    • Antibody-mediated cell killing involves diverse mechanisms including apoptosis and cytotoxicity.

    Purpose of the Study:

    • To outline methods for characterizing lead antibody candidates.
    • To highlight the role of antibody Fc regions in cell killing.

    Main Methods:

    • Utilizing high-throughput flow cytometry assays for rapid, multidose characterization.
    • Assaying for apoptosis, complement-mediated mechanisms, and antibody-dependent cellular cytotoxicity.

    Main Results:

    • Human IgG1 Fc portions can activate complement-mediated cell death.
    • Complement-dependent cytotoxicity involves direct tumor cell killing via the membrane attack complex.

    Conclusions:

    • High-throughput assays facilitate efficient characterization of therapeutic antibody candidates.
    • Understanding antibody-mediated cell killing mechanisms is vital for optimizing antibody-based therapies.

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