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Updated: Feb 14, 2026

Author Spotlight: Optimizing Antibody-Based Cancer Treatments via Antibody-Dependent, Cell-Mediated Cytotoxicity Assay
05:21

Author Spotlight: Optimizing Antibody-Based Cancer Treatments via Antibody-Dependent, Cell-Mediated Cytotoxicity Assay

Published on: September 13, 2024

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Assessment of Antibody-Dependent Cellular Cytotoxicity by Flow Cytometry

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 antibody-dependent cellular cytotoxicity (ADCC). High-throughput flow cytometry assays enable rapid characterization of these antibody-mediated cell-killing effects.

    Area of Science:

    • Immunology
    • Biotechnology
    • Pharmacology

    Background:

    • Therapeutic antibodies can induce target cell death, a critical feature for efficacy.
    • Mechanisms of antibody-mediated cell killing include apoptosis, complement-dependent cytotoxicity, and antibody-dependent cellular cytotoxicity (ADCC).

    Purpose of the Study:

    • To describe methods for characterizing lead antibody candidates based on their cell-killing capabilities.
    • To highlight the utility of high-throughput flow cytometry for rapid, multidose antibody characterization.

    Main Methods:

    • Assays for apoptosis, complement-mediated killing, and ADCC.
    • High-throughput flow cytometry systems for extensive candidate characterization.
    • Characterization of antibodies utilizing the human IgG1 Fc portion for complement activation.

    Main Results:

    • Antibodies can trigger cell death via multiple pathways.
    • ADCC involves natural killer (NK) cells recognizing antibody-bound tumor cells via Fc receptors.
    • NK cell activation releases cytotoxic granules (perforin, granzymes) and interferon-γ.

    Conclusions:

    • High-throughput flow cytometry assays provide efficient characterization of antibody-mediated cell killing.
    • Understanding these mechanisms is crucial for developing effective therapeutic antibodies.
    • ADCC represents a key pathway for NK cell-mediated tumor cell lysis by therapeutic antibodies.

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