目的建立检测抗CD52单克隆抗体原液中残余DNA的方法,并对该方法进行验证。方法利用CHO Host Cell DNA Extraction&Amplification Kit,采用qPCR法检测抗CD52单克隆抗体中宿主细胞残留DNA含量,并进行方法的专属性、线性、准确度、精密度和耐用性验证。结果该方法可以准确定量检测CHO细胞残留DNA含量。专属性验证试验中对照制剂无特异扩增曲线,而CHO细胞上清有明显的扩增曲线;5次试验中标准曲线相关系数R~2均≥0.98,表明该方法线性良好;准确度验证试验中所有试验的加标回收率均在70%~130%范围内;精密度验证试验中所有试验检测结果的相对标准偏差(RSD)均不大于30%;耐用性验证试验中,Proteinase K不同消化温度下检测结果的CV为0.85%,不同稀释倍数的供试品加标回收率在70%~130%范围内,不同稀释倍数外源DNA检测结果CV为4.71%。结论该方法专属性、准确度、精密度、线性和耐用性均符合要求,可采用该试剂盒qPCR法检测外源DNA残留量。
【英文摘要】
Objective To establish and validate a method for determination of residual host cell DNA in anti-CD52 monoclonal antibody. Methods The residual exogenous DNA was determined by qPCR using CHO Host Cell DNA Extraction & Amplification Kit. The method was verified for specificity, linearity, accuracy, precision and durability.Results The residual DNA of CHO cells was accurately quantified by the developed method. No specific amplification curve was obtained by specificity validation test on control reagent, whi...
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