کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10162188 1114320 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solid-State mAbs and ADCs Subjected to Heat-Stress Stability Conditions can be Covalently Modified with Buffer and Excipient Molecules
موضوعات مرتبط
علوم پزشکی و سلامت داروسازی، سم شناسی و علوم دارویی اکتشاف دارویی
پیش نمایش صفحه اول مقاله
Solid-State mAbs and ADCs Subjected to Heat-Stress Stability Conditions can be Covalently Modified with Buffer and Excipient Molecules
چکیده انگلیسی
We report that a unique type of chemical modification occurs on lyophilized proteins. Freeze-dried mAbs and antibody-drug conjugates (ADCs) can be covalently modified with buffer and excipient molecules on the side chains of Glu, Asp, Thr, and Ser amino acids when subjected to temperature stress. The reaction occurs primarily via condensation of common buffers and excipients such as histidine, tris, trehalose and sucrose, with Glu and Asp carboxylates in the primary sequence of proteins. The reaction was also found to proceed through condensation of carboxylate containing buffers such as citrate, with Thr and Ser hydroxyls in the primary sequence of proteins. Based on the mass of the covalent adducts observed on mAbs and ADCs, it is apparent that the reaction produces water as a product and is thus favored in a low moisture environments such as a lyophilized protein cake. Herein, we present the evidence for the covalent modification of proteins drawn from case studies of in-depth characterization of heat-stressed mAbs and ADCs in the solid state. We also demonstrate how common charge variant assays such as imaged capillary isoelectric focusing and mass spectrometry can be used to monitor this specific class of protein modification.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Pharmaceutical Sciences - Volume 104, Issue 2, February 2015, Pages 652-665
نویسندگان
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