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Harnessing endogenous miRNAs to control virus tissue tropism as a strategy for developing attenuated virus vaccines.

Abstract：

:Live attenuated vaccines remain the safest, most cost-effective intervention against viral infections. Because live vaccine strains are generated empirically and the basis for attenuation is usually ill defined, many important viruses lack an efficient live vaccine. Here, we present a general strategy for the rational design of safe and effective live vaccines that harnesses the microRNA-based gene-silencing machinery to control viral replication. Using poliovirus as a model, we demonstrate that insertion of small miRNA homology sequences into a viral genome can restrict its tissue tropism, thereby preventing pathogenicity and yielding an attenuated viral strain. Poliovirus strains engineered to become targets of neuronal-specific miRNAs lost their ability to replicate in the central nervous system, leading to significant attenuation of neurovirulence in infected animals. Importantly, these viruses retained the ability to replicate in nonneuronal tissues. As a result, these engineered miRNA-regulated viruses elicited strong protective immunity in mice without producing disease.

journal_name

Cell Host Microbe

journal_title

Cell host & microbe

authors

Barnes D,Kunitomi M,Vignuzzi M,Saksela K,Andino R

doi

10.1016/j.chom.2008.08.003

subject

Has Abstract

pub_date

2008-09-11 00:00:00

pages

239-48

issue

3

eissn

1931-3128

issn

1934-6069

pii

S1931-3128(08)00259-X

journal_volume

4

pub_type

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