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用国产时间分辨荧光免疫分析仪建立检测抗CCP抗体的TrFIA法 被引量:2

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摘要 目的用国产时间分辨荧光免疫分析(TrFIA)仪建立TrFIA法检测IgG类抗环瓜氨酸肽抗体(抗CCP-IgG抗体)。方法以人工合成的环瓜氨酸肽作为抗原包被微孔板,异氰酸苄基二乙烯三胺四乙酸络合铕(Eu3+-DTTA)标记鼠抗人IgG单克隆抗体,建立TrFIA法,分析CCP抗原包被浓度和Eu3+标记抗体最适用量,测定Eu3+标记抗体的标记率,用国产TrFIA仪进行检测,绘制标准曲线并分析本法的线性范围、精密度、特异性,计算回收率。对比分析建立的TrFIA法和欧蒙公司的ELISA法结果的一致率。结果本法CCP抗原的最适包被浓度为5μg/mL,最适Eu3+标记抗体稀释度为1∶1 000;平均每个鼠抗人IgG分子上连接10.27个Eu3+;标准曲线为Y=1.162X+2.819,相关系数(r2)=0.998;批内和批间CV分别为4.8%~5.6%和5.9%~7.6%;平均回收率为97.4%(96.5%~98.6%);用本法检测抗核抗体和抗CCP抗体无交叉反应;与ELISA比对试验结果,两法一致率为96.8%(90/93),Kappa值=0.95。结论建立的TrFIA法敏感性高、特异性好,可为抗CCP抗体的检测提供一种新的选择。
出处 《临床检验杂志》 CAS CSCD 北大核心 2012年第7期503-504,共2页 Chinese Journal of Clinical Laboratory Science
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