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Dengue vaccine breakthrough infections reveal properties of neutralizing antibodies linked to protection
Sandra Henein, … , Ralph Baric, Aravinda M. de Silva
Sandra Henein, … , Ralph Baric, Aravinda M. de Silva
Published May 18, 2021
Citation Information: J Clin Invest. 2021;131(13):e147066. https://doi.org/10.1172/JCI147066.
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Concise Communication Virology Article has an altmetric score of 79

Dengue vaccine breakthrough infections reveal properties of neutralizing antibodies linked to protection

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Abstract

The 4 serotypes of dengue virus (DENV1–4) are mosquito-borne flaviviruses that infect humans. Live attenuated tetravalent DENV vaccines are at different phases of clinical testing. DENV vaccine developers have relied on neutralizing antibodies (NAbs) as a correlate of protection. A leading tetravalent vaccine (Dengvaxia) stimulated NAbs to the 4 DENV serotypes, yet overall vaccine efficacy was low in children who were DENV seronegative at baseline before vaccination. We compared the properties of (a) NAbs induced by WT DENV1 or DENV3 infections, which are strongly correlated with protection from repeat infections, and (b) NAbs induced by Dengvaxia in individuals who subsequently experienced DENV1 or DENV3 breakthrough infections. WT infections induced NAbs that recognized epitopes unique (type specific) to each serotype, whereas the vaccine stimulated qualitatively different NAbs that recognized epitopes conserved (crossreactive) between serotypes. Our results indicate that, among children who were DENV-seronegative at baseline, unbalanced replication of the DENV type 4 vaccine component in the tetravalent vaccine stimulates Abs capable of crossneutralizing DENV1 and DENV3 in vitro, but not protecting in vivo. In DENV-seronegative individuals who are vaccinated, we propose that type-specific NAbs are a better correlate of protection than total levels of NAbs.

Authors

Sandra Henein, Cameron Adams, Matthew Bonaparte, Janice M. Moser, Alina Munteanu, Ralph Baric, Aravinda M. de Silva

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