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Updated: Feb 14, 2026
05:21
Author Spotlight: Optimizing Antibody-Based Cancer Treatments via Antibody-Dependent, Cell-Mediated Cytotoxicity Assay
Published on: September 13, 2024
923
Assessment of Antibody-Dependent Cellular Cytotoxicity by Flow Cytometry
Cold Spring Harbor Protocols
|February 14, 2018
Summary
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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