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Receptor occupancy assessment by flow cytometry as a pharmacodynamic biomarker in biopharmaceutical development

2015; Wiley; Volume: 90; Issue: 2 Linguagem: Inglês

10.1002/cyto.b.21259

1552-4957

Meina Liang, Martin Schwickart, Amy Schneider, Inna Vainshtein, Christopher Del Nagro, Nathan Standifer, Lorin Roskos,

Microfluidic and Bio-sensing Technologies

Receptor occupancy (RO) assays are designed to quantify the binding of therapeutics to their targets on the cell surface and are frequently used to generate pharmacodynamic (PD) biomarker data in nonclinical and clinical studies of biopharmaceuticals. When combined with the pharmacokinetic (PK) profile, RO data can establish PKPD relationships, which are crucial for informing dose decisions. RO is commonly measured by flow cytometry on fresh blood specimens and is subject to numerous technical and logistical challenges. To ensure that reliable and high quality results are generated from RO assays, careful assay design, key reagent characterization, data normalization/reporting, and thorough planning for implementation are of critical importance during development. In this article, the authors share their experiences and perspectives in these areas and discuss challenges and potential solutions when developing and implementing a flow cytometry-based RO method in support of biopharmaceutical drug development.