An isoform of Dicer protects mammalian stem cells against multiple RNA viruses.

An isoform of Dicer protects mammalian stem cells against multiple RNA viruses.
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DOI:
10.1126/science.abg2264
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发表时间:
2021-07-09
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Reis e Sousa C
Reis e Sousa C
中科院分区:
其他
文献类型:
--
作者:
Poirier EZ;Buck MD;Chakravarty P;Carvalho J;Frederico B;Cardoso A;Healy L;Ulferts R;Beale R;Reis e Sousa C

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In mammals, early resistance to viruses relies on interferons, which protect differentiated cells but not stem cells from viral replication. Many other organisms rely instead on RNA interference (RNAi) mediated by a specialised Dicer protein that cleaves viral double stranded RNA. Whether RNAi also contributes to mammalian antiviral immunity remains controversial. We identified an isoform of Dicer, named antiviral Dicer (aviD), that protects tissue stem cells from RNA viruses—including Zika virus and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)—by dicing viral double-stranded RNA to orchestrate antiviral RNAi. Our work sheds light on the molecular regulation of antiviral RNAi in mammalian innate immunity in which different cell-intrinsic antiviral pathways can be tailored to the differentiation status of cells.
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