Abstract
Cell-based assays using primary cells and cell lines have been increasingly utilized to address scientific questions related to disease and therapeutic agents in clinical trials to: (1) gain greater understanding into the mechanism of action (MOA) of therapeutic agents; (2) identify patients that may respond to therapy; and (3) monitor pharmacodynamic biomarkers. Cell-based assays are also vital for the evaluation of target engagement or saturation, evaluation of safety markers, and monitoring mechanisms of resistance. However, implementation of cell-based assays in a clinical setting is challenging due to inherent variability (e.g., inter-subject, inter-assay) and stochastic factors that affect assay outcome. Hence, appropriate cell-based assay qualification and validation is required prior to testing clinical study samples. Assay qualification should include: (1) evaluation and optimization of relevant assay controls; (2) well-defined cell culture conditions; (3) stability determination of the analytes; and (4) inter-assay and intra-assay variance. This chapter provides an overview for some of the cell-based assays applicable for clinical studies. Examples of such assays include functional assays utilizing primary cells and cell lines, antibody-dependent cellular cytotoxicity (ADCC) and complement dependent cytotoxicity (CDC) assays, circulating tumor cell (CTC) assays, and receptor occupancy assays. Implementation and translational utility of these cell-based assays in clinical studies, including assay challenges and result interpretation, are discussed.
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Acknowledgments
The authors would like to thank Brett M. Hall, Senior Director Oncology Biomarkers, Janssen R&D for his review and suggestions. The authors would also like to thank the Diane Mohr, Director Biomarker Operations and Eric Dichter, Assistant General Counsel (all from Janssen R&D) for review and approval of the chapter.
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Reddy, M.P., Sasser, A.K. (2016). Application of Cell-Based Assays in Clinical Trials. In: Weiner, R., Kelley, M. (eds) Translating Molecular Biomarkers into Clinical Assays . AAPS Advances in the Pharmaceutical Sciences Series, vol 21. Springer, Cham. https://doi.org/10.1007/978-3-319-40793-7_11
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DOI: https://doi.org/10.1007/978-3-319-40793-7_11
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