将抗兔IgG(即二抗)物理吸附于聚苯乙烯微孔板上作为通用固相,通过免疫反应制备固相抗体。采用辣根过氧化物酶催化鲁米诺-过氧化氢化学发光体系,建立了一种高通量、简便、快速的化学发光酶免疫分析方法用于临床测定人血清中的孕酮。对各种影响因素如免疫试剂的稀释度、发光底物选择、发光反应时间及温育条件等进行了考察和优化,最终选定的实验条件:孕酮抗体和HRP标记物的最佳稀释度分别为1:100000和1:15000;选用Ⅱ号发光底物,发光反应10min后测定;37℃水浴条件下温育1h。对建立的方法进行了评价。该方法的灵敏度为0.08μg/L;批内和批间相对标准偏差均在15%之内;低、中、高3个不同浓度值样品的平均回收率分别为101%、101%和94.4%(在87.8%~108%之间)。使用本方法和经典的放射免疫法同时对36份人血清样品进行测定,结果显示,本方法与放射免疫分析方法相关性良好,其相关系数为0.9502。
A high-throughput, simple and rapid chemiluminescence enzyme immunoassay (CLEIA)was developed for the clinical determination of progesterone in human serum, and the luminol-hydrogen peroxide was used as chemiluminescence system catalyzed by horseradish peroxidase (HRP). The solid phase of anti-progesterone antibody was prepared through the immunoreaction between anti-progesterone polyclonal antibody with donkey anti-rabbit IgG, i.e. second antibody, which had been physically absorbed on the wells of poly-styrene microplate and was used as a universal solid phase. The effect of several factors, such as the dilution ratios of the immunoreagents, the chemiluminescent substrate, the chemiluminescence reaction time and incu- bation condition were examined and optimized. The optimal dilutions of anti-progesterone antibody and HRP-progesterone conjugate were 1:10000 and 1:15000, respectively. The substrate Ⅱ was chosen and the luminescence was determined after 10 min incubation. The immunoreaction was incubated in water bath at 37 ℃ for 1 h. The assay was evaluated with sensitivity as low as 0.08 μg/L. The RSD was less than 15% for both intra-and inter-assay precision. The recoveries of three different spiked concentration samples were 101%, 101% and 94.4%, respectively. This proposed method has been successfully applied to the clinical evaluation of progesterone in 36 human sera. The results showed a good correlation with the commercially available radioimmunoassay kit with a correlative coefficient of 0. 9502.