Mechanism of action
Firstly, IgG neutralizes pathogens such as viruses and bacteria by binding to key pathogen surface proteins and preventing interaction of the pathogen with host cells. In doing so, the antibody neutralizes the ability of the pathogen to enter host cells and replicate.The mechanisms of action of Ig not only involve the blockade of Fc receptors of phagocytes, but also control complement pathways, idiotype-anti-idiotype dimer formation, blockage of superantigen binding to T cells, inhibition of dendritic cells and stimulation of regulatory T cells (Tregs).