A Cell-Based Reporter Assay Measuring the Activation of Fc Gamma Receptors Induced by Therapeutic Monoclonal Antibodies.

Fc gamma receptors (FcγRs) are expressed on the surface of various immune cells, and the interactions between FcγRs and the Fc region of immunoglobulin G are involved in the activation of immune cells by antigen-bound antibodies. Fc-mediated immune-cell activations are related to both the efficacy and the safety of therapeutic monoclonal antibodies. It is indispensable to elucidate the Fc-mediated functions in the development of therapeutic monoclonal antibodies. Here, we describe a cell-based assay using FcγR-expressing reporter cell lines that can be used to evaluate the human FcγR-activation properties of therapeutic monoclonal antibodies by a rapid and simple procedure.