目的建立用于全人源抗人肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)单克隆抗体鉴别的毛细管等电聚焦(capillary isoelectric focusing,c IEF)方法,并进行验证。方法通过优化c IEF过程中各关键实验参数,如阴极稳定剂浓度、阳极稳定剂浓度、两性电解质浓度、3-10与8-10.5两性电解质比例、聚焦时间、聚焦电压,建立c IEF方法,并对方法的专属性、重复性、中间精密度进行验证。结果确定c IEF方法的实验参数为:阴极稳定剂浓度30 mmol/L,阳极稳定剂浓度3.2 mmol/L,3-10两性电解质在样品溶液中体积比为6.0%,聚焦电压为25 k V,聚焦时间为10 min。保护剂在样品出峰时间无紫外吸收峰,阳性对照阿达木单抗与样品出峰时间及峰形一致,阴性对照利妥昔单抗生物类似药、贝伐珠单抗、曲妥珠单抗生物类似药、西妥昔单抗与样品出峰时间及峰形均不一致,且对样品无干扰;样品制备重复性主峰等电点的相对标准差(relative standard deviation,RSD)为0.114%,中间精密度RSD为0.837%。结论建立的c IEF方法 p H...
【英文摘要】
Objective To develop and validate a capillary isoelectric focusing(c IEF) method for identification of fully human anti-tumor necrosis factor(TNF)-α monoclonal antibody(m Ab). Methods A capillary isoelectric focusing method was developed by optimization of key parameters in c IEF, such as the concentrations of cathodic and anodic stabilizers and carrier ampholytes, the ratio of ampholytes 3-10 to 8-10. 5 as well as the time and voltage for focusing, and validated for specificity, reproducibility and interme...
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