Journal
MOLECULAR CELL
Volume 10, Issue 4, Pages 809-817Publisher
CELL PRESS
DOI: 10.1016/S1097-2765(02)00649-4
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Funding
- NIGMS NIH HHS [R01 GM044073-12] Funding Source: Medline
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Adenosine deaminases that act on RNA (ADARs) are RNA-editing enzymes that deaminate adenosines to create inosines in double-stranded RNA (dsRNA). Here we demonstrate that ADARs are not required for RNA interference (RNAi) and that they do not antagonize the pathway to a detectable level when RNAi is initiated by injecting dsRNA. We find, however, that transgenes expressed in the somatic tissues of wild-type animals are silenced in strains with deletions in the two genes encoding ADARs, adr-1 and adr-2. Transgene-induced gene silencing in adr-1;adr-2 mutants depends on genes required for RNAi, suggesting that a dsRNA intermediate is involved. In wild-type animals we detect edited dsRNA corresponding to transgenes, and we propose that editing of this dsRNA prevents somatic transgenes from initiating RNAi in wild-type animals.
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