Ebola virus antibody decay–stimulation in a high proportion of survivors

Adaken, C. et al. (2021) Ebola virus antibody decay–stimulation in a high proportion of survivors. Nature, 590, pp. 468-472. (doi: 10.1038/s41586-020-03146-y) (PMID:33505020) (PMCID:PMC7839293)

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Abstract

Neutralizing antibody function provides a foundation for the efficacy of vaccines and therapies1,2,3. Here, using a robust in vitro Ebola virus (EBOV) pseudo-particle infection assay and a well-defined set of solid-phase assays, we describe a wide spectrum of antibody responses in a cohort of healthy survivors of the Sierra Leone EBOV outbreak of 2013–2016. Pseudo-particle virus-neutralizing antibodies correlated with total anti-EBOV reactivity and neutralizing antibodies against live EBOV. Variant EBOV glycoproteins (1995 and 2014 strains) were similarly neutralized. During longitudinal follow-up, antibody responses fluctuated in a ‘decay–stimulation–decay’ pattern that suggests de novo restimulation by EBOV antigens after recovery. A pharmacodynamic model of antibody reactivity identified a decay half-life of 77–100 days and a doubling time of 46–86 days in a high proportion of survivors. The highest antibody reactivity was observed around 200 days after an individual had recovered. The model suggests that EBOV antibody reactivity declines over 0.5–2 years after recovery. In a high proportion of healthy survivors, antibody responses undergo rapid restimulation. Vigilant follow-up of survivors and possible elective de novo antigenic stimulation by vaccine immunization should be considered in order to prevent EBOV viral recrudescence in recovering individuals and thereby to mitigate the potential risk of reseeding an outbreak.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Scott, Dr Janet
Authors: Adaken, C., Scott, J. T., Sharma, R., Gopal, R., Dicks, S., Niazi, S., Ijaz, S., Edwards, T., Smith, C. C., Cole, C. P., Kamara, P., Kargbo, O., Doughty, H. A., van Griensven, J., Horby, P. W., Gevao, S. M., Sahr, F., Dimelow, R. J., Tedder, R. S., Semple, M. G., Paxton, W. A., and Pollakis, G.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
Journal Name:Nature
Publisher:Nature Research
ISSN:0028-0836
ISSN (Online):1476-4687
Published Online:27 January 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Nature 590:468–472
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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