A codon-pair deoptimized live-attenuated vaccine against respiratory syncytial virus is immunogenic and efficacious in non-human primates.

Abstract:

:Despite a critical need for a respiratory syncytial virus (RSV) vaccine and decades of development efforts, a vaccine to protect infants, elderly, and other at-risk populations from RSV infection remains elusive. We have previously generated a new, live-attenuated vaccine candidate against RSV using rational, computer-aided gene design and chemical synthesis through a process termed viral gene "deoptimization." In this study, we assessed the attenuation, immunogenicity, and efficacy of this synthetic, live-attenuated RSV vaccine candidate, RSV-MinL4.0, in African Green Monkeys. RSV-MinL4.0 was produced under good-manufacturing-practice (GMP) in Vero cells. Vaccination with RSV-MinL4.0 resulted in minimal virus shedding after vaccination, generation of robust humoral and cellular immune responses (despite the presence of baseline RSV neutralizing antibodies in one animal) that were comparable to a wildtype infection, and protection from virus shedding post-challenge with wildtype RSV. These findings demonstrate the promise of RSV-MinL4.0 as a live-attenuated vaccine which will undergo clinical trials to test its ability to safely and effectively protect pediatric and elderly populations from infection with RSV.

journal_name

Vaccine

journal_title

Vaccine

authors

Mueller S,Stauft CB,Kalkeri R,Koidei F,Kushnir A,Tasker S,Coleman JR

doi

10.1016/j.vaccine.2020.02.056

subject

Has Abstract

pub_date

2020-03-23 00:00:00

pages

2943-2948

issue

14

eissn

0264-410X

issn

1873-2518

pii

S0264-410X(20)30279-6

journal_volume

38

pub_type

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