Characterization of Nanoparticle Tracking Analysis for Quantification and Sizing of Submicron Particles of Therapeutic Proteins

被引:23
作者
Zhou, Chen [1 ]
Krueger, Aaron B. [1 ]
Barnard, James G. [1 ]
Qi, Wei [1 ]
Carpenter, John F. [1 ]
机构
[1] Univ Colorado, Dept Pharmaceut Sci, Aurora, CO 80045 USA
关键词
analysis; particle size; proteins; protein aggregation; protein formulation; light scattering; nanoparticles; physical characterization; nanotechnology; SUBVISIBLE PARTICLES; IMMUNOGENICITY; PRODUCTS;
D O I
10.1002/jps.24510
中图分类号
R914 [药物化学];
学科分类号
100701 ;
摘要
Submicron particles may play important roles in therapeutic protein product quality, stability, and adverse effects in patients. However, quantitation of these particles has been challenging. Nanoparticle tracking analysis (NTA) is capable of both sizing and counting submicron particles. We investigated the effects of product and instrument parameters on NTA results for nanoparticle standards and therapeutic protein samples. To obtain proper particle size distributions, complete tracking numbers of at least 200 and 400 were required for latex nanobeads and protein nanoparticles, respectively. In addition, when set at suboptimal values, the minimum expected particle size parameter led to inaccurate sizing and counting for all particles types investigated. A syringe pump allowed for higher sampling volumes, and results were reproducible for nanoparticle sizing and counts at flow rates 7 L/min. Finally, because therapeutic protein products are being formulated at relatively high protein concentrations, we investigated the effects of protein concentration on nanoparticle characterization. With high protein concentrations, nanoparticle sizing was not affected, whereas particle concentrations were significantly reduced. Linear relationships between particle count and dilution factor were obtained when a high protein concentration formulation was diluted into particle-free solutions at the same protein concentrations, but not when dilutions were made into buffer. (c) 2015 Wiley Periodicals, Inc. and the American Pharmacists Association J Pharm Sci 104:2441-2450, 2015
引用
收藏
页码:2441 / 2450
页数:10
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