目的考察包被不同种类的胶体金标记(金标)抗原对抗新型冠状病毒(2019 novel coronavirus,2019-nCoV)抗体快速检测测试卡检测质量的影响。
方法采用抗2019-nCoV抗体样本盘检测厂家L包被有不同金标抗原的胶体金测试卡,比较产品的灵敏度、特异度、准确度和正确指数,暂时以准确度>95%、正确指数>0.85为合格标准。
结果厂家L的6个批次分别包被有重组2019-nCoV的刺突(spike,S)+核衣壳(nucleocapsid,N)蛋白(L002)、受体结合域(receptor-binding domain,RBD)+N蛋白(L003)、N蛋白(L004)、RBD蛋白(L006)、S蛋白(L007)、N+S蛋白(L008)的测试卡,检测IgG的准确度/正确指数分别为98.38%/0.966、97.30%/0.946、97.84%/0.954、90.82%/0.873、97.86%/0.958、95.72%/0.919;检测IgM的准确度/正确指数分别为90.51%/0.736、95.57%/0.890、73.10%/0.298、68.37%/0.331、83.96%/0.533、87.17%/0.658。
结论所有金标抗原包被的测试卡检测IgG均合格,只有RBD与N蛋白组合的包被金标抗原测试卡检测IgM合格,通过优化包被的金标抗原种类可提高测试卡检测IgM的质量。
ObjectiveTo investigate the effect of different types of coated gold-labeled antigens on the quality of anti-2019 novel coronavirus (2019-nCoV) antibody rapid detection test cassettes.
MethodsAn anti-2019-nCoV antibody sample panel was used to test colloidal gold test cassettes coated with different gold-labeled antigens from manufacturer L. The sensitivity, specificity, accuracy and correctness index of the product were compared. For the time being, the eligibility standard was set at accuracy >95% and correctness index >0.85.
ResultsFor the 6 batches of test cassettes from manufacturer L coated with recombinant 2019-nCoV spike (S)+ nucleocapsid (N) proteins (L002), receptor-binding domain (RBD)+ N proteins (L003), N protein(L004), RBD protein(L006), S protein(L007), N+ S proteins (L008), the accuracies/correctness indexes of detecting IgG were 98.38%/0.966, 97.30%/0.946, 97.84%/0.954, 90.82%/0.873, 97.86%/0.958, 95.72%/0.919, respectively, and those of detecting IgM were 90.51%/0.736, 95.57%/0.890, 73.10%/0.298, 68.37%/0.331, 83.96%/0.533, 87.17%/0.658, respectively.
ConclusionsTest cassettes coated with all kinds of gold-labeled antigens are qualified for IgG detection, but only the combination of RBD and N proteins coated test cassette is qualified for IgM detection. The quality of IgM detection can be improved by optimizing the types of gold-labeled antigens coated.
Hu Yong and Zhou Zhijun have contributed equally to the article
胡勇,周志军,岳胜兰,等. 包被抗原种类对抗新型冠状病毒抗体胶体金测试卡检测质量的影响[J]. 国际生物制品学杂志,2021,44(03):129-132.
DOI:10.3760/cma.j.cn311962-20201019-00101版权归中华医学会所有。
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抗原 | 阳性 | 阴性 | 灵敏度/% | 特异度/% | 准确度/% | 正确指数 | |
---|---|---|---|---|---|---|---|
RBD(L006) | |||||||
阳性盘( n=71) | 62 | 9 | 87.32 | 100.00 | 90.82 | 0.873 | |
阴性盘( n=27) | 0 | 27 | |||||
S(L007) | |||||||
阳性盘( n=88) | 87 | 1 | 98.86 | 96.97 | 97.86 | 0.958 | |
阴性盘( n=99) | 3 | 96 | |||||
N(L004) | |||||||
阳性盘( n=84) | 81 | 3 | 96.43 | 99.01 | 97.84 | 0.954 | |
阴性盘( n=101) | 1 | 100 |
注:RBD:受体结合域;S:刺突;N:核衣壳
抗原 | 阳性 | 阴性 | 灵敏度/% | 特异度/% | 准确度/% | 正确指数 | |
---|---|---|---|---|---|---|---|
RBD(L006) | |||||||
阳性盘( n=46) | 17 | 29 | 36.96 | 96.15 | 68.37 | 0.331 | |
阴性盘( n=52) | 2 | 50 | |||||
S(L007) | |||||||
阳性盘( n=57) | 33 | 24 | 57.89 | 95.38 | 83.96 | 0.533 | |
阴性盘( n=130) | 6 | 124 | |||||
N(L004) | |||||||
阳性盘( n=55) | 17 | 38 | 30.91 | 98.89 | 73.10 | 0.298 | |
阴性盘( n=90) | 1 | 89 |
注:RBD:受体结合域;S:刺突;N:核衣壳
抗原 | 阳性 | 阴性 | 灵敏度/% | 特异度/% | 准确度/% | 正确指数 | |
---|---|---|---|---|---|---|---|
S+N(L002) | |||||||
阳性盘( n=84) | 82 | 2 | 97.62 | 99.01 | 98.38 | 0.966 | |
阴性盘( n=101) | 1 | 100 | |||||
RBD+N(L003) | |||||||
阳性盘( n=84) | 82 | 2 | 97.62 | 97.03 | 97.30 | 0.946 | |
阴性盘( n=101) | 3 | 98 | |||||
N+S(L008) | |||||||
阳性盘( n=88) | 88 | 0 | 100.00 | 91.92 | 95.72 | 0.919 | |
阴性盘( n=99) | 8 | 91 |
注:S:刺突;N:核衣壳;RBD:受体结合域
抗原 | 阳性 | 阴性 | 灵敏度/% | 特异度/% | 准确度/% | 正确指数 | |
---|---|---|---|---|---|---|---|
S+N(L002) | |||||||
阳性盘( n=55) | 41 | 14 | 74.55 | 99.03 | 90.51 | 0.736 | |
阴性盘( n=103) | 1 | 102 | |||||
RBD+N(L003) | |||||||
阳性盘( n=55) | 50 | 5 | 90.91 | 98.06 | 95.57 | 0.890 | |
阴性盘( n=103) | 2 | 101 | |||||
N+S(L008) | |||||||
阳性盘( n=57) | 41 | 16 | 71.93 | 93.85 | 87.17 | 0.658 | |
阴性盘( n=130) | 8 | 122 |
注:S:刺突;N:核衣壳;RBD:受体结合域

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