一种检测针对主要关注变异株的中和抗体的SARS-CoV-2替代中和试验的验证
Validation of a SARS-CoV-2 Surrogate Neutralization Test Detecting Neutralizing Antibodies against the Major Variants of Concern.
作者信息
Santos da Silva Eveline, Servais Jean-Yves, Kohnen Michel, Arendt Vic, Staub Therese, Krüger Rejko, Fagherazzi Guy, Wilmes Paul, Hübschen Judith M, Ollert Markus, Perez-Bercoff Danielle, Seguin-Devaux Carole
机构信息
Department of Infection and Immunity, Luxembourg Institute of Health, 29 Rue Henri Koch, L-4354 Esch-sur-Alzette, Luxembourg.
National Service of Infectious Diseases, Centre Hospitalier de Luxembourg, 4 Rue Ernest Barblé, L-1210 Luxembourg, Luxembourg.
出版信息
Int J Mol Sci. 2023 Oct 6;24(19):14965. doi: 10.3390/ijms241914965.
SARS-CoV-2 infection and/or vaccination elicit a broad range of neutralizing antibody responses against the different variants of concern (VOC). We established a new variant-adapted surrogate virus neutralization test (sVNT) and assessed the neutralization activity against the ancestral B.1 (WT) and VOC Delta, Omicron BA.1, BA.2, and BA.5. Analytical performances were compared against the respective VOC to the reference virus neutralization test (VNT) and two CE-IVD labeled kits using three different cohorts collected during the COVID-19 waves. Correlation analyses showed moderate to strong correlation for Omicron sub-variants (Spearman's r = 0.7081 for BA.1, r = 0.7205 for BA.2, and r = 0.6042 for BA.5), and for WT (r = 0.8458) and Delta-sVNT (r = 0.8158), respectively. Comparison of the WT-sVNT performance with two CE-IVD kits, the "Icosagen SARS-CoV-2 Neutralizing Antibody ELISA kit" and the "Genscript cPass, kit" revealed an overall good correlation ranging from 0.8673 to -0.8773 and a midway profile between both commercial kits with 87.76% sensitivity and 90.48% clinical specificity. The BA.2-sVNT performance was similar to the BA.2 Genscript test. Finally, a correlation analysis revealed a strong association (r = 0.8583) between BA.5-sVNT and VNT sVNT using a double-vaccinated cohort ( = 100) and an Omicron-breakthrough infection cohort ( = 91). In conclusion, the sVNT allows for the efficient prediction of immune protection against the various VOCs.
严重急性呼吸综合征冠状病毒2(SARS-CoV-2)感染和/或疫苗接种引发了针对不同关注变体(VOC)的广泛中和抗体反应。我们建立了一种新的适应变体的替代病毒中和试验(sVNT),并评估了针对原始B.1(野生型,WT)以及VOC德尔塔、奥密克戎BA.1、BA.2和BA.5的中和活性。使用在新冠疫情期间收集的三个不同队列,将分析性能与各自的VOC相对于参考病毒中和试验(VNT)以及两种CE-IVD标记试剂盒进行了比较。相关性分析显示,奥密克戎亚变体(BA.1的斯皮尔曼相关系数r = 0.7081,BA.2的r = 0.7205,BA.5的r = 0.6042)以及WT(r = 0.8458)和德尔塔-sVNT(r = 0.8158)分别呈现中度至强相关性。将WT-sVNT性能与两种CE-IVD试剂盒“艾考斯根SARS-CoV-2中和抗体ELISA试剂盒”和“金斯瑞cPass试剂盒”进行比较,发现总体相关性良好,范围在0.8673至 -0.8773之间,且处于两种商业试剂盒之间的中间水平,灵敏度为87.76%,临床特异性为90.48%。BA.2-sVNT性能与BA.2金斯瑞检测相似。最后,相关性分析显示,在一个双疫苗接种队列(n = 100)和一个奥密克戎突破性感染队列(n = 91)中,BA.5-sVNT与VNT sVNT之间存在强关联(r = 0.8583)。总之,sVNT能够有效预测针对各种VOC的免疫保护作用。