Molecular and functional analysis of monoclonal antibodies in support of biologics development

Abstract

Monoclonal antibody (mAb)-based therapeutics are playing an increasingly important role in the treatment or prevention of many important diseases such as cancers, autoimmune disorders, and infectious diseases. Multidomain mAbs are far more complex than small molecule drugs with intrinsic heterogeneities. The critical quality attributes of a given mAb, including structure, post-translational modifications, and functions at biomolecular and cellular levels, need to be defined and profiled in details during the developmental phases of a biologics. These critical quality attributes, outlined in this review, serve an important database for defining the drug properties during commercial production phase aswell as post licensure life cycle management. Specially, the molecular characterization, functional assessment, and effector function analysis of mAbs, are reviewed with respect to the critical parameters and the methods used for obtaining them. The three groups of analytical methods are three essential and integral facets making up the whole analytical package for a mAb-based drug.Such a package is critically important for thelicensure andthepost-licensure lifecyclemanagement of a therapeutic or prophylactic biologics. In addition, the basic principles on the evaluation of biosimilarmAbs were discussed briefly based on the recommendations by the World Health Organization.

Keywords

monoclonal antibody / molecular characterization / ligand binding assay / cell based assay / heterogeneity / functional assessment

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