A nanoenzyme linked immunochromatographic sensor for rapid and quantitative detection of SARS-CoV-2 nucleocapsid protein in human blood

SENSORS AND ACTUATORS B-CHEMICAL

卷:349

Article

Liang, Chaolan¹  Liu, Bochao^1,2,3  Li, Jinfeng⁴  Lu, Jinhui¹  Zhang, Enhui¹  Deng, Qitao¹  Zhang, Ling¹  Chen, Ruiai^5,6  Li, Chengyao¹  Li, Tingting¹ 

[1] Southern Med Univ, Dept Transfus Med, Sch Lab Med & Biotechnol, Guangzhou 510515, Peoples R China

[2] Guangzhou Bai Rui Kang BRK Biol Sci & Technol Ltd, Guangzhou, Peoples R China

[3] Guangzhou Blood Ctr, Guangzhou, Peoples R China

[4] Shenzhen Ctr Dis Control & Prevent, Shenzhen Key Lab Mol Epidemiol, Shenzhen, Peoples R China

[5] Guangdong Lab Lingnan Modern Agr Sci & Technol, Zhaoqing Branch Ctr, Zhaoqing, Peoples R China

[6] South China Agr Univ, Coll Vet Med, Guangzhou, Peoples R China

关键词: SARS-CoV-2;    Rapid detection;    Immunochromatography;    Photometer;    Smartphone;   

DOI  :  10.1016/j.snb.2021.130718

来源: Elsevier

【 摘 要 】

The establishment of a simple, low-cost, high-sensitive and rapid immunoassay for detecting SARS-CoV-2 antigen in human blood is an effective mean of discovering early SARS-CoV-2 infection and controlling the pandemic of COVID-19. Herein, a smartphone based nanozyme linked immunochromatographic sensor (NLICS) for the detection of SARS-CoV-2 nucleocapsid protein (NP) has been developed on demand. The system is integrated by disposable immunochromatography assay (ICA) and optical sensor devices. Immunoreaction and enzyme-catalyzed substrate color reaction were carried out on the chromatographic strip in a device, of which the light signal was read by a photometer through a biosensor channel, and the data was synchronously transmitted via the Bluetooth to the app in-stored smartphone for reporting the result. With a limit of detection (LOD) of 0.026 ng/mL NP, NLICS had the linear detection range (LDR) between 0.05 and 1.6 ng/mL NP, which was more sensitive than conventional ICA. NLICS took 25 min for reporting results. For detection of NP antigen in clinical serum samples from 21 COVID-19 patients and 80 healthy blood donor controls, NLICS and commercial enzyme linked immunosorbent assay (ELISA) had 76.2% or 47.6% positivity, and 100% specificity, respectively (P = 0.057), while a good correlation coefficient (r = 0.99) for quantification of NP between two assays was obtained. In conclusion, the NLICS was a rapid, simple, cheap, sensitive and specific immunochromatographic sensing assay for early diagnosis of SARS-CoV-2 infection.

【 授权许可】

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