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Characterization of critical reagents in ligand-binding assays: enabling robust bioanalytical methods and lifecycle management

    Brian J Geist

    * Author for correspondence

    Biologics Clinical Pharmacology, Biotechnology Center of Excellence, Janssen R&D, LLC, Radnor, PA 19087, USA.

    ,
    Adrienne Clements Egan

    Biologics Clinical Pharmacology, Biotechnology Center of Excellence, Janssen R&D, LLC, Radnor, PA 19087, USA

    ,
    Tong-Yuan Yang

    Biologics Clinical Pharmacology, Biotechnology Center of Excellence, Janssen R&D, LLC, Radnor, PA 19087, USA

    ,
    Yuxin Dong

    Biologics Clinical Pharmacology, Biotechnology Center of Excellence, Janssen R&D, LLC, Radnor, PA 19087, USA

    &
    Gopi Shankar

    Biologics Clinical Pharmacology, Biotechnology Center of Excellence, Janssen R&D, LLC, Radnor, PA 19087, USA

    Published Online:https://doi.org/10.4155/bio.12.304

    The effective management of validated ligand-binding assays used for PK, PD and immunogenicity assessments of biotherapeutics is vital to ensuring robust and consistent assay performance throughout the lifetime of the method. The structural integrity and functional quality of critical reagents is often linked to ligand-binding assay performance; therefore, physicochemical and biophysical characterization coupled with assessment of assay performance can enable the highest degree of reagent quality. The implementation of a systematic characterization process for monitoring critical reagent attributes, utilizing detailed analytical techniques such as LC–MS, can expedite assay troubleshooting and identify deleterious trends. In addition, this minimizes the potential for costly delays in drug development due to reagent instability or batch-to-batch variability. This article provides our perspectives on a proactive critical reagent QC process. Case studies highlight the analytical techniques used to identify chemical and molecular factors and the interdependencies that can contribute to protein heterogeneity and integrity.

    Papers of special note have been highlighted as: ▪ of interest ▪▪ of considerable interest

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