Comparison of chemiluminescence enzyme immunoassay based on magnetic microparticles with traditional colorimetric ELISA for the detection of serum α-fetoprotein

A chemiluminescence enzyme immunoassay based on magnetic microparticles (MmPs-CLEIA) was developed to evaluate serum a-fetoprotein (AFP) in parallel with traditional colorimetric enzyme-linked immunosorbent assay (ELISA).A systematic comparison between the MmPs-CLEIA and colorimetric ELISA concluded that the MPs-CLEIA exhibited fewer dosages of immunoreagents,less total assay time,and better linearity,recovery,precision,sensitivity and validity.AFP was detected in forty human serum samples by the proposed MPs-CLEIA and ELISA,and the results were compared with commercial electrochemiluminescence immunoassay (ECLIA) kit.The correlation coefficient between MPs-CLEIA and ELISA was obtained with R 2 0.6703;however,the correlation between MPs-CLEIA and ECLIA (R 2 0.9582) was obviously better than that between colorimetric ELISA and ECLIA (R 2 0.6866).

高灵敏的磁酶免疫吸附分析法用于谷物中伏马菌素FB_1的快速检测

建立谷物中伏马菌素FB1磁酶免疫吸附分析法（Magnetic enzyme-linked immunoassay,MELISA）,并对实际样品进行测定。以自制磁性纳米颗粒为固相载体,负载伏马菌素FB1-卵清蛋白偶联物（FB1-OVA）,建立检测FB1的MELISA方法,并与传统ELISA法和国标方法（HPLC,GB/T 255228—2010）进行比较。该方法线性回归方程为y=-0.229 5x＋0.569 3（x为lg（CFB 1）,y为OD/OD0）,线性范围0.1~25.0 ng/m L,相关系数r=0.995 4,检测限为0.071 ng/m L,与其他4种真菌毒素交叉反应率均低于2.0%。在不同的加标水平下,玉米和小麦批内加标回收率分别为95.2%~120.0%和84.4%~120.0%,对应的批间加标回收率分别为90.0%~100.0%和90.0%~110.0%（其相应的批内和批间RSD分别小于6.5%和12.8%）。与传统的ELISA和HPLC法相比,MELISA具有更低的检测限和更高的灵敏度。本研究所建立的MELISA灵敏度高、操作简单、检测快速,适用于大批量谷物样品中FB1含量的快速测定。