Influenza viruses that require 10 genomic segments as antiviral therapeutics

Autoři: Alfred T. Harding aff001;  Griffin D. Haas aff001;  Benjamin S. Chambers aff001;  Nicholas S. Heaton aff001
Působiště autorů: Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, United States of America aff001
Vyšlo v časopise: Influenza viruses that require 10 genomic segments as antiviral therapeutics. PLoS Pathog 15(11): e1008098. doi:10.1371/journal.ppat.1008098
Kategorie: Research Article
doi: 10.1371/journal.ppat.1008098


Influenza A viruses (IAVs) encode their genome across eight, negative sense RNA segments. During viral assembly, the failure to package all eight segments, or packaging a mutated segment, renders the resulting virion incompletely infectious. It is known that the accumulation of these defective particles can limit viral disease by interfering with the spread of fully infectious particles. In order to harness this phenomenon therapeutically, we defined which viral packaging signals were amenable to duplication and developed a viral genetic platform which produced replication competent IAVs that require up to two additional artificial genome segments for full infectivity. The modified and artificial genome segments propagated by this approach are capable of acting as “decoy” segments that, when packaged by coinfecting wild-type viruses, lead to the production of non-infectious viral particles. Although IAVs which require 10 genomic segments for full infectivity are able to replicate themselves and spread in vivo, their genomic modifications render them avirulent in mice. Administration of these viruses, both prophylactically and therapeutically, was able to rescue animals from a lethal influenza virus challenge. Together, our results show that replicating IAVs designed to propagate and spread defective genomic segments represent a potent anti-influenza biological therapy that can target the conserved process of particle assembly to limit viral disease.

Klíčová slova:

Genetic interference – Genomic signal processing – Influenza A virus – Influenza viruses – Mammalian genomics – Viral genomics – Viral replication – Virions


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2019 Číslo 11

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