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Heat inactivation of serum interferes with the immunoanalysis of antibodies to SARS-CoV-2
Xiumei Hu; Taixue An; Bo Situ; Yuhai Hu; Zihao Ou; Qiang Li; Xiaojing He; Ye Zhang; Peifu Tian; Dehua Sun; Yongyu Rui; Qian Wang; Dan Ding; Lei Zheng.
Afiliación
  • Xiumei Hu; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Taixue An; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Bo Situ; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Yuhai Hu; Department of Medicine Laboratory, Hankou Hospital of Wuhan
  • Zihao Ou; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Qiang Li; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Xiaojing He; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Ye Zhang; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Peifu Tian; Department of Medicine Laboratory, Hankou Hospital of Wuhan
  • Dehua Sun; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Yongyu Rui; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Qian Wang; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
  • Dan Ding; State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive Materials, Ministry of Education, and College of Life Sciences, and State Key La
  • Lei Zheng; Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University. Guangdong Engineering and Technology Research Center for Rapid Diagnostic Bios
Preprint en En | PREPRINT-MEDRXIV | ID: ppmedrxiv-20034231
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ABSTRACT
The detection of serum antibodies to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is emerging as a new tool for the coronavirus disease-2019 (COVID-19) diagnosis. Since many coronaviruses are sensitive to heat, heating inactivation of samples at 56 {degrees}C prior to testing is considered a possible method to reduce the risk of transmission, but the effect of heating on the measurement of SARS-CoV-2 antibodies is still unclear. By comparing the levels of SARS-CoV-2 antibodies before and after heat inactivation of serum at 56 {degrees}C for 30 minutes using a quantitative fluorescence immunochromatographic assay, we shown that heat inactivation significantly interferes with the levels of antibodies to SARS-CoV-2. The IgM levels of all the 34 serum samples (100%) from COVID-19 patients decreased by an average level of 53.56%. The IgG levels were decreased in 22 of 34 samples (64.71%) by an average level of 49.54%. Similar changes can also be observed in the non-COVID-19 diseases group (n=9). Of note, 44.12% of the detected IgM levels were dropped below the cut-off value after heating, suggesting heat inactivation can lead to false-negative results of these samples. Our results indicate that heat inactivation of serum at 56 {degrees}C for 30 minutes interferes with the immunoanalysis of antibodies to SARS-CoV-2. Heat inactivation prior to immunoanalysis is not recommended and the possibility of false-negative results should be considered if the sample was pre-inactivated by heating.
Licencia
cc_by_nc_nd
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Diagnostic_studies / Experimental_studies / Prognostic_studies Idioma: En Año: 2020 Tipo del documento: Preprint
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Diagnostic_studies / Experimental_studies / Prognostic_studies Idioma: En Año: 2020 Tipo del documento: Preprint