Adenosine deaminase acting on RNA 1 limits RIG-I RNA detection and suppresses IFN production responding to viral and endogenous RNAs.
Adenosine deaminase acting on RNA 1 limits RIG-I RNA detection and suppresses IFN production responding to viral and endogenous RNAs.
复制标题
DOI:
10.4049/jimmunol.1401136
复制
发表时间:
2014-10-01
期刊:
影响因子:
--
通讯作者:
Wang Q
中科院分区:
文献类型:
--
作者:
Yang S;Deng P;Zhu Z;Zhu J;Wang G;Zhang L;Chen AF;Wang T;Sarkar SN;Billiar TR;Wang Q
Type I interferons (IFNs) play central roles in innate immunity; however, overproduction of IFN can lead to immunopathology. Here, we demonstrate that adenosine deaminase acting on RNA 1 (ADAR1), an RNA-editing enzyme induced by interferon, is essential for cells to avoid inappropriate sensing of cytosolic RNA in an inducible knockout cell model – the primary mouse embryo fibroblast (MEF) derived from ADAR1 lox/lox & Cre-ER mice, as well as in HEK293 cells. ADAR1 suppresses viral and cellular RNA detection by RIG-I through its RNA binding rather than its RNA editing activity. DsRNA binds to both ADAR1 and RIG-I, but ADAR1 reduces RIG-I RNA binding. In the absence of ADAR1, cellular RNA stimulates type I IFN production without viral infection or exogenous RNA stimulation. Moreover, we showed in the ADAR1 inducible knockout mice that ADAR1 gene disruption results in a high level IFN production in neuronal tissues – the hallmark of Aicardi-Goutières Syndrome (AGS), a heritable autoimmune disease recently found to be associated with ADAR1 gene mutations. In summary, this study found that ADAR1 limits cytosolic RNA sensing by RIG-I through its RNA binding activity; therefore, ADAR1 suppresses type I IFN production stimulated by viral and cellular RNAs. These results explain why loss of ADARA1 causes IFN induction and also indicates a mechanism for the involvement of ADAR1 in autoimmune diseases such as AGS.
登录
查看更多内容
影响因子:
11.4
作者:
Heale, Bret S. E.;Keegan, Liam P.;McGurk, Leeanne;Michlewski, Gracjan;Brindle, James;Stanton, Chloe M.;Caceres, Javier F.;O'Connell, Mary A.
通讯作者:
O'Connell, Mary A.
影响因子:
64.8
作者:
Alexopoulou, L;Holt, AC;Flavell, RA
通讯作者:
Flavell, RA
影响因子:
4.4
作者:
Gowen, Brian B.;Wong, Min-Hui;Sidwell, Robert W.
通讯作者:
Sidwell, Robert W.
影响因子:
11.4
作者:
Eisenberg, E;Nemzer, S;Levanon, EY
通讯作者:
Levanon, EY
影响因子:
14.9
作者:
Herbert, A;Schade, M;Rich, A
通讯作者:
Rich, A