CpG dinucleotide enrichment in the influenza A virus genome as a live attenuated vaccine development strategy
CpG dinucleotide enrichment in the influenza A virus genome as a live attenuated vaccine development strategy
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甲型流感病毒基因组中 CpG 二核苷酸富集作为减毒活疫苗的开发策略
DOI:
10.1101/2022.04.29.490024
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Sharp C
中科院分区:
文献类型:
--
作者:
Sharp C
Synonymous recoding of RNA virus genomes is a promising approach for generating attenuated viruses to use as vaccines. Problematically, recoding typically hinders virus growth, but this may be rectified using CpG dinucleotide enrichment. CpGs are recognised by cellular zinc-finger antiviral protein (ZAP), and so in principle, removing ZAP sensing from a virus propagation system will reverse attenuation of a CpG-enriched virus, enabling high titre yield of a vaccine virus. We tested this using a vaccine strain of influenza A virus (IAV) engineered for increased CpG content in genome segment 1. Virus attenuation was mediated by the short isoform of ZAP, correlated with the number of CpGs added, and was enacted via turnover of viral transcripts. The CpG-enriched virus was strongly attenuated in mice, yet conveyed protection from a potentially lethal challenge dose of wildtype virus. Importantly for vaccine development, CpG-enriched viruses were genetically stable during serial passage. Unexpectedly, in both MDCK cells and embryonated hens’ eggs that are used to propagate live attenuated influenza vaccines, the ZAP-sensitive virus was fully replication competent. Thus, ZAP-sensitive CpG enriched viruses that are defective in human systems can yield high titre in vaccine propagation systems, providing a realistic, economically viable platform to augment existing live attenuated vaccines.
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影响因子:
9.8
作者:
Shaw AE;Hughes J;Gu Q;Behdenna A;Singer JB;Dennis T;Orton RJ;Varela M;Gifford RJ;Wilson SJ;Palmarini M
通讯作者:
Palmarini M
影响因子:
5.3
作者:
COOPER, DN;KRAWCZAK, M
通讯作者:
KRAWCZAK, M
影响因子:
10.7
作者:
N. Saitou;M. Nei
通讯作者:
M. Nei
DOI:
10.1073/pnas.2121453119
发表时间:
2022-08-02
影响因子:
11.1
作者:
通讯作者:
--
影响因子:
16.6
作者:
Koliopoulos MG;Lethier M;van der Veen AG;Haubrich K;Hennig J;Kowalinski E;Stevens RV;Martin SR;Reis e Sousa C;Cusack S;Rittinger K
通讯作者:
Rittinger K