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柯志, 周冬梅, 徐军, 等. 毛细管区带电泳检测抗EGFR抗体的电荷异质性[J]. 分析测试学报, 2015,34(12):1414-1418.
Charge Variants Determination of Anti-EGFR Antibody by Capillary Zone Electrophoresis[J]. 2015,34(12):1414-1418.
建立了抗表皮生长因子受体(EGFR)抗体电荷异质性的检测方法。采用毛细管区带电泳(CZE)模式,考察了分离缓冲液浓度和pH值、添加剂、分离电压、毛细管温度对主峰与酸碱性变体分离度的影响。以380 mmol?L-1 6-氨基己酸(EACA,pH 6.0)为分离缓冲液,0.1%羟丙基甲基纤维素(HPMC)和1.9 mmol?L-1三亚乙基四胺(TETA)作为添加剂,分离电压25 kV,分离时间8 min,毛细管温度20 ℃条件下,电荷变体能够得到良好分离,且在0.1~1 mg?mL-1范围内线性关系良好,相关系数均大于0.99,主成分、酸、碱变体1和碱变体2的定量下限(LOQ)分别为30.0,150.2,125.2,93.3 μg?L-1,重复性和中间精密度RSD值小于2%,回收率为95.4%~105.4%。该方法简单、快速、成本低,可以满足抗EGFR抗体的电荷异质性检测要求。
A simple and rapid capillary zone electrophoresis method was developed for charge variants determination of anti-epidermal growth factor receptor(EGFR) antibody.To obtain better resolution of antibody charge variants and less analysis time,a number of separation parameters were investigated,including concentration and pH value of separation buffer,concentration of additives,separation voltage and temperature of capillary.The optimized conditions were as follows: separation buffer:pH 6.0 380 mmol?L-1 6-aminocaproic acid(EACA) containing 0.1% hydroxypropyl methyl cellulose(HPMC) and 1.9 mmol?L-1 triethylenetetramine(TETA);applied separation voltage:25 kV;capillary temperature: 20 ℃.Under the optimized conditions,the highest resolution was obtained among all the charge variants in 8 min.Meanwhile,all the components,including the main component,acidic variants,basic variants 1 and basic variants 2,were linear in the range of 0.1-1 mg?mL-1 with correlation coefficients more than 0.99.The limit of quantitation for the four charge variants were 30.0,150.2,125.2 ,93.3 μg?L-1,respectively.The method showed a good repeatability and intermediate precision for all components with RSDs less than 2%,and the recoveries for all the antibody charge variants ranged from 95.4% to 105.4%.This method was simple,rapid and low cost,and could meet the requirement for the determination the charge variants of anti-EGFR antibody.
毛细管区带电泳电荷异质性抗EGFR抗体添加剂
capillary zone electrophoresischarge variantsanti-EGFR antibodyadditives
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