FCER1G and atherosclerosis: The antibody was also used to assess macrophage foam cell formation via Oil Red O staining and mitogen-activated protein kinase signaling via immunoblotting in the FcαRIR209L/FcRγ-expressing RAW264.7 macrophage cell line I3D.<h4>Results</h4>Targeting of monovalent FcαRI induced inhibitory effects in the FcαRIR209L/FcRγApoE<sup>-/-</sup> mouse model of atherosclerosis by inhibiting macrophage infiltration.