Xencor's asthma candidate shows posive results in preclinical study Xencor will present preclinical data comparing activity of XmAb7195 to omalizumab in reducing IgE, a protein responsible for triggering disease activity in asthma and other allergic disorders. The study supports future studies in human clinical trials. The results of the study found that after a single 5 mg/kg intravenous dose of XmAb7195 or omalizumab in chimpanzees, XmAb7195 reduced free IgE to at least 10-fold lower levels than omalizumab. Similar to its effects in humans, omalizumab increased total IgE. In contrast, XmAb7195 rapidly depleted total IgE below quantifiable levels within 1 hour.