Longitudinal Analysis of the Human B Cell Response to Ebola Virus Infection

Cell. 2019 May 30;177(6):1566-1582.e17. doi: 10.1016/j.cell.2019.04.036. Epub 2019 May 16.

Abstract

Ebola virus (EBOV) remains a public health threat. We performed a longitudinal study of B cell responses to EBOV in four survivors of the 2014 West African outbreak. Infection induced lasting EBOV-specific immunoglobulin G (IgG) antibodies, but their subclass composition changed over time, with IgG1 persisting, IgG3 rapidly declining, and IgG4 appearing late. Striking changes occurred in the immunoglobulin repertoire, with massive recruitment of naive B cells that subsequently underwent hypermutation. We characterized a large panel of EBOV glycoprotein-specific monoclonal antibodies (mAbs). Only a small subset of mAbs that bound glycoprotein by ELISA recognized cell-surface glycoprotein. However, this subset contained all neutralizing mAbs. Several mAbs protected against EBOV disease in animals, including one mAb that targeted an epitope under evolutionary selection during the 2014 outbreak. Convergent antibody evolution was seen across multiple donors, particularly among VH3-13 neutralizing antibodies specific for the GP1 core. Our study provides a benchmark for assessing EBOV vaccine-induced immunity.

Keywords: B cell repertoire; Ebola; IgG subclass; antibody evolution; public clonotype.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adult
  • Amino Acid Sequence / genetics
  • Animals
  • Antibodies, Monoclonal / immunology*
  • Antibodies, Monoclonal / isolation & purification
  • Antibodies, Neutralizing / immunology
  • Antibodies, Viral / immunology
  • B-Lymphocytes / metabolism
  • B-Lymphocytes / physiology*
  • Chlorocebus aethiops
  • Ebola Vaccines / immunology
  • Ebolavirus / genetics
  • Ebolavirus / metabolism
  • Ebolavirus / pathogenicity
  • Epitopes / blood
  • Female
  • Glycoproteins / genetics
  • Hemorrhagic Fever, Ebola / immunology*
  • Hemorrhagic Fever, Ebola / metabolism
  • Hemorrhagic Fever, Ebola / virology
  • Humans
  • Immunoglobulin G / immunology
  • Jurkat Cells
  • Longitudinal Studies
  • Male
  • Mice
  • Mice, Inbred BALB C
  • Survivors
  • Vero Cells
  • Viral Envelope Proteins / genetics

Substances

  • Antibodies, Monoclonal
  • Antibodies, Neutralizing
  • Antibodies, Viral
  • Ebola Vaccines
  • Epitopes
  • Glycoproteins
  • Immunoglobulin G
  • Viral Envelope Proteins