Protocol for the murine antibody-dependent cellular phagocytosis assay.

Antibody-dependent cellular phagocytosis (ADCP) is a process through which myeloid cells are able to exert their phagocytic function after recognition of opsonized bacteria, viruses, infected cells or any cells targeted by a specific antibody. ADCP of tumor cells represents a potent effector mechanism of monoclonal antibody therapy mediated by tumor associated macrophages (TAM) and other phagocytic cells as an in situ anti-tumor activity. Here we described a protocol based on flow cytometry and immunofluorescence assays enabling extensive comparative studies to address whether a monoclonal antibody engaging Fcγ receptors on macrophages can mediate in vitro ADCP of tumor cells.