Abstract
Omalizumab is an anti-IgE monoclonal antibody (mAb) approved for the treatment of moderate-to-severe asthma. Herein, we report physicochemical, biological, pharmacological, and toxicological characteristics of an Omalizumab biosimilar mAb named KA. We show that KA and its originator present only minimum differences. Their charge heterogeneity and primary, secondary structures are similar. The two molecules are comparable regarding in vitro activity, including molecular binding and cell-based inhibition. Pharmacological and toxicological properties were assessed using a mouse model of allergy and cynomolgus monkeys, and we determined that the efficacy, safety, and pharmacokinetic characteristics of KA are comparable to its originator. Our data, which demonstrated that KA has similar activity to the Omalizumab reference product in relevant preclinical models, calls for a clinical evaluation of its bio-similarity.
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