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Development of a Rapid Point-Of-Care Test that Measures Neutralizing Antibodies to SARS-CoV-2
Douglas F. Lake; Alexa J. Roeder; Erin Kaleta; Paniz Jasbi; Kirsten Pfeffer; Calvin J Koelbel; Sivakumar Periasamy; Natalia Kuzmina; Alexander Bukreyev; Thomas E Grys; Liang Wu; John R. Mills; Kathrine McAulay; Alim Seit-Nebi; Sergei Svarovsky.
Afiliación
  • Douglas F. Lake; Arizona State University
  • Alexa J. Roeder; Arizona State University
  • Erin Kaleta; Mayo Clinic Arizona
  • Paniz Jasbi; Arizona State University
  • Kirsten Pfeffer; Arizona State University
  • Calvin J Koelbel; Arizona State University
  • Sivakumar Periasamy; University of Texas Medical Branch at Galveston
  • Natalia Kuzmina; University of Texas Medical Branch at Galveston
  • Alexander Bukreyev; University of Texas Medical Branch at Galveston
  • Thomas E Grys; Mayo Clinic Arizona
  • Liang Wu; Mayo Clinic Rochester
  • John R. Mills; Mayo Clinic Rochester
  • Kathrine McAulay; Mayo Clinic Arizona
  • Alim Seit-Nebi; Axim Biotechnologies
  • Sergei Svarovsky; Axim Biotechnologies
Preprint en En | PREPRINT-MEDRXIV | ID: ppmedrxiv-20248264
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ABSTRACT
BackgroundAfter receiving a COVID-19 vaccine, most recipients want to know if they are protected from infection and for how long. Since neutralizing antibodies are a correlate of protection, we developed a lateral flow assay (LFA) that measures levels of neutralizing antibodies from a drop of blood. The LFA is based on the principle that neutralizing antibodies block binding of the receptor-binding domain (RBD) to angiotensin-converting enzyme 2 (ACE2). MethodsThe ability of the LFA was assessed to correctly measure neutralization of sera, plasma or whole blood from patients with COVID-19 using SARS-CoV-2 microneutralization assays. We also determined if the LFA distinguished patients with seasonal respiratory viruses from patients with COVID-19. To demonstrate the usefulness of the LFA, we tested previously infected and non-infected COVID-19 vaccine recipients at baseline and after first and second vaccine doses. ResultsThe LFA compared favorably with SARS-CoV-2 microneutralization assays with an area under the ROC curve of 98%. Sera obtained from patients with seasonal coronaviruses did not show neutralizing activity in the LFA. After a single mRNA vaccine dose, 87% of previously infected individuals demonstrated high levels of neutralizing antibodies. However, if individuals were not previously infected only 24% demonstrated high levels of neutralizing antibodies after one vaccine dose. A second dose boosted neutralizing antibody levels just 8% higher in previously infected individuals, but over 63% higher in non-infected individuals. ConclusionsA rapid, semi-quantitative, highly portable and inexpensive neutralizing antibody test might be useful for monitoring rise and fall in vaccine-induced neutralizing antibodies to COVID-19.
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Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Idioma: En Año: 2020 Tipo del documento: Preprint
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Idioma: En Año: 2020 Tipo del documento: Preprint