Cell Reports Medicine (Jun 2020)

Rapid Generation of Neutralizing Antibody Responses in COVID-19 Patients

  • Mehul S. Suthar,
  • Matthew G. Zimmerman,
  • Robert C. Kauffman,
  • Grace Mantus,
  • Susanne L. Linderman,
  • William H. Hudson,
  • Abigail Vanderheiden,
  • Lindsay Nyhoff,
  • Carl W. Davis,
  • Oluwaseyi Adekunle,
  • Maurizio Affer,
  • Melanie Sherman,
  • Stacian Reynolds,
  • Hans P. Verkerke,
  • David N. Alter,
  • Jeannette Guarner,
  • Janetta Bryksin,
  • Michael C. Horwath,
  • Connie M. Arthur,
  • Natia Saakadze,
  • Geoffrey H. Smith,
  • Srilatha Edupuganti,
  • Erin M. Scherer,
  • Kieffer Hellmeister,
  • Andrew Cheng,
  • Juliet A. Morales,
  • Andrew S. Neish,
  • Sean R. Stowell,
  • Filipp Frank,
  • Eric Ortlund,
  • Evan J. Anderson,
  • Vineet D. Menachery,
  • Nadine Rouphael,
  • Aneesh K. Mehta,
  • David S. Stephens,
  • Rafi Ahmed,
  • John D. Roback,
  • Jens Wrammert

Journal volume & issue
Vol. 1, no. 3
p. 100040

Abstract

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Summary: SARS-CoV-2, the virus responsible for COVID-19, is causing a devastating worldwide pandemic, and there is a pressing need to understand the development, specificity, and neutralizing potency of humoral immune responses during acute infection. We report a cross-sectional study of antibody responses to the receptor-binding domain (RBD) of the spike protein and virus neutralization activity in a cohort of 44 hospitalized COVID-19 patients. RBD-specific IgG responses are detectable in all patients 6 days after PCR confirmation. Isotype switching to IgG occurs rapidly, primarily to IgG1 and IgG3. Using a clinical SARS-CoV-2 isolate, neutralizing antibody titers are detectable in all patients by 6 days after PCR confirmation and correlate with RBD-specific binding IgG titers. The RBD-specific binding data were further validated in a clinical setting with 231 PCR-confirmed COVID-19 patient samples. These findings have implications for understanding protective immunity against SARS-CoV-2, therapeutic use of immune plasma, and development of much-needed vaccines.

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