Application of a high-throughput relative chemical stability assay to screen therapeutic protein formulations by assessment of conformational stability and correlation to aggregation propensity

Journal of Pharmaceutical Sciences
Joseph M RizzoMohammed Shameem

Abstract

In this study, an automated high-throughput relative chemical stability (RCS) assay was developed in which various therapeutic proteins were assessed to determine stability based on the resistance to denaturation post introduction to a chaotrope titration. Detection mechanisms of both intrinsic fluorescence and near UV circular dichroism (near-UV CD) are demonstrated. Assay robustness was investigated by comparing multiple independent assays and achieving r(2) values >0.95 for curve overlays. The complete reversibility of the assay was demonstrated by intrinsic fluorescence, near-UV CD, and biologic potency. To highlight the method utility, we compared the RCS assay with differential scanning calorimetry and dynamic scanning fluorimetry methodologies. Utilizing C1/2 values obtained from the RCS assay, formulation rank-ordering of 12 different mAb formulations was performed. The prediction of long-term stability on protein aggregation is obtained by demonstrating a good correlation with an r(2) of 0.83 between RCS and empirical aggregation propensity data. RCS promises to be an extremely useful tool to aid in candidate formulation development efforts based on the complete reversibility of the method to allow for multiple assessm...Continue Reading

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Jun 12, 2013·Journal of Pharmaceutical Sciences·Shuai ShiMohammed Shameem
Jun 26, 2013·Drug Discovery Today·Ernesto FreireRichard K Brown

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Citations

Jan 27, 2016·Journal of Chromatography. a·S H M HedbergJ M Liddell
Apr 26, 2017·Analytical Chemistry·Marc B TarabanY Bruce Yu
Feb 26, 2019·Biotechnology Advances·Arabelle CassedyRichard O'Kennedy
Oct 27, 2021·Molecular Pharmaceutics·Diana C GomesChristopher J Roberts

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