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Antigen production and development of an indirect ELISA based on the nucleocapsid protein to detect human SARS-CoV-2 seroconversion
Marcelo dos Santos Conzentino; Karl Forchhammer; Emanuel M Souza; Fabio de Oliveira Pedrosa; Meri B Nogueira; Sonia M Raboni; Fabiane G M Rego; Dalila L Zanette; Mateus N Aoki; Jeanine M Nardin; Bruna Fornazari; Hugo M P Morales; Paola A F Celedon; Carla V P Lima; Sibelle B Mattar; Vanessa H Lin; Luis G Morello; Fabricio K Marchini; Lucas B Bueno; Rodrigo A Reis; Luciano Huergo Sr..
Afiliación
  • Marcelo dos Santos Conzentino; UFPR
  • Karl Forchhammer; Interfaculty Institute of Mikrobiologie and Infection Medicine
  • Emanuel M Souza; UFPR
  • Fabio de Oliveira Pedrosa; Universidade Federal do Parana Setor de Ciencias Biologicas
  • Meri B Nogueira; UFPR
  • Sonia M Raboni; UFPR
  • Fabiane G M Rego; UFPR
  • Dalila L Zanette; Fiocruz
  • Mateus N Aoki; Fiocruz
  • Jeanine M Nardin; Hospital Erasto Gaertner
  • Bruna Fornazari; Hospital Erasto Gaertner
  • Hugo M P Morales; Hospital Erasto Gaertner
  • Paola A F Celedon; IBMP
  • Carla V P Lima; IBMP
  • Sibelle B Mattar; IBMP
  • Vanessa H Lin; IBMP
  • Luis G Morello; Fiocruz; IBMP
  • Fabricio K Marchini; Fiocruz; IBMP
  • Lucas B Bueno; UFPR
  • Rodrigo A Reis; UFPR
  • Luciano Huergo Sr.; UFPR
Preprint en En | PREPRINT-MEDRXIV | ID: ppmedrxiv-21252100
Artículo de revista
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ABSTRACT
Serological assays are important tools to identify previous exposure to SARS-CoV-2, helping to track COVID-19 cases and determine the level of humoral response to SARS-CoV-2 infections and/or immunization to future vaccines. Here the SARS-CoV-2 nucleocapsid protein was expressed in Escherichia coli and purified to homogeneity and high yield using a single chromatography step. The purified SARS-CoV-2 nucleocapsid protein was used to develop an indirect enzyme-linked immunosorbent assay for the identification of human SARS-CoV-2 seroconverts. The assay sensitivity and specificity were determined analyzing sera from 140 PCR-confirmed COVID-19 cases and 210 pre-pandemic controls. The assay operated with 90% sensitivity and 98% specificity; identical accuracies were obtained in head-to-head comparison with a commercial ELISA kit. Antigen coated plates were stable for up to 3 months at 4{degrees}C). The ELISA method described is ready to mass production and will be an additional toll to track COVID-19 cases.
Licencia
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Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Diagnostic_studies / Observational_studies Idioma: En Año: 2021 Tipo del documento: Preprint
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Diagnostic_studies / Observational_studies Idioma: En Año: 2021 Tipo del documento: Preprint