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- W2068651607 abstract "Monoclonal antibody (mAb) fragments are emerging as promising alternatives to full-length mAbs as protein therapeutic candidates. Antigen-binding fragments (Fabs) are the most advanced with three Fab-based drug products currently approved. This work presents preformulation characterization data on the effect of pH, NaCl concentration, and various cationic excipients on the physical and chemical stability of a Fab molecule with multiple negatively charged Asp residues in the complementarity-determining region. Conformational stability was evaluated using an empirical phase diagram approach based on circular dichroism, intrinsic Trp and extrinsic 8-anilino-1-naphthalene sulfonate (ANS) fluorescence, and static light scattering measurements. The effect of NaCl concentration, various cationic excipients and pH on the Fab molecule’s conformational stability, aggregation propensity, and chemical stability (Asp isomerization) was determined by differential scanning calorimetry, optical density measurements at 350 nm (OD350), and ion-exchange chromatography, respectively. Increasing NaCl concentration increased the overall conformational stability, decreased aggregation rates, and lowered the rates of Asp isomerization. No such trends were noted for pH or cationic excipients. The potential interrelationships between protein conformational and chemical stability are discussed in the context of designing stable protein formulations." @default.
- W2068651607 created "2016-06-24" @default.
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- W2068651607 date "2013-08-01" @default.
- W2068651607 modified "2023-09-25" @default.
- W2068651607 title "Effect of Ionic Strength and pH on the Physical and Chemical Stability of a Monoclonal Antibody Antigen-Binding Fragment" @default.
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- W2068651607 doi "https://doi.org/10.1002/jps.23645" @default.
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