کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2485989 1114372 2012 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Viscosity Behavior of High-Concentration Monoclonal Antibody Solutions: Correlation with Interaction Parameter and Electroviscous Effects
موضوعات مرتبط
علوم پزشکی و سلامت داروسازی، سم شناسی و علوم دارویی اکتشاف دارویی
پیش نمایش صفحه اول مقاله
Viscosity Behavior of High-Concentration Monoclonal Antibody Solutions: Correlation with Interaction Parameter and Electroviscous Effects
چکیده انگلیسی
The purpose of this work was to understand the viscosity behavior of high-concentration monoclonal antibody (mAb) solutions in a wide range of solution conditions and generate guidelines helpful to formulate products with manageable viscosity. The zeta potential and effective isoelectric point (pI) were determined from electrophoretic mobility measurements. High-frequency rheology studies characterized viscoelasticity at high concentrations. The interaction parameter (kD) obtained from dynamic light scattering quantified intermolecular interactions. Circular dichroism characterized conformational stability upon change in solution pH. Except for mAb-1, all other mAb solutions were found to be more viscous at solution pHs closer to the molecular pI. For mAb-2, mAb-3, and mAb-10,the kD indicated intermolecular attractions at the pI, wherein the net molecular charge (Z) was zero, whereas repulsions dominated at pHs away from the pI. At the pI, Z and, hence, the charge-induced repulsions are minimal, whereas the charge distribution becomes most conspicuous. The resulting dominance of nonspecific attractive interactions at the pI increases the self-association or aggregation behavior of protein molecules, leading to a higher viscosity at the pI. mAb-1 is an exception to this general behavior. The kD could serve as a qualitative screening tool to predict high-concentration viscosity behavior, whereas the correlation with net charge was inconsistent. A higher negative kD generally resulted in a more viscous solution at high concentrations; however, direct quantitative assessment was not possible.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Pharmaceutical Sciences - Volume 101, Issue 3, March 2012, Pages 998-1011
نویسندگان
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