Omalizumab is a recombinant, humanized, monoclonal antibody against human immunoglobulin E (IgE) with a KD of 0.393 nM. Omalizumab binds to the human FcγRIIb receptors with a KD of 6.37 uM. Omalizumab has the potential for persistent allergic asthma research[2].In Vitro: Omalizumab (0.1, 0.5, 1.0, 2.0 μg/mL) has a direct effect on the B cells and can reduce the number of membrane IgE+ cells present in IL-4 plus anti-CD40 treated B cell cultures. Omalizumab alone has no effect on the viable cell number.
Omalizumab (1 μg/mL; 3, 7 days) reduces IL-6 secretion in human B cells. Omalizumab does not induce apoptosis in human B cells.
In Vivo: Omalizumab (10 mg/kg/day; ip; on day 8 to 42) increases IgE levels in human PBMC-engrafted severe combined immunodeficiency (huSCID) mice.