Cited by 538RNA regulation and diseaseinterferon and immune responsesRNA Research and Splicing

Human ADAR1 Prevents Endogenous RNA from Triggering Translational Shutdown

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Chung, Hachung, Calis, Jorg J.A., Wu, Xianfang, Sun, Tony, Yu, Yingpu, Sarbanes, Stephanie L., Dao Thi, Viet Loan, Shilvock, Abigail R. +3 more·2018·Cell

Abstract

Type I interferon (IFN) is produced when host sensors detect foreign nucleic acids, but how sensors differentiate self from nonself nucleic acids, such as double-stranded RNA (dsRNA), is incompletely understood. Mutations in ADAR1, an adenosine-to-inosine editing enzyme of dsRNA, cause Aicardi-Goutières syndrome, an autoinflammatory disorder associated with spontaneous interferon production and neurologic sequelae. We generated ADAR1 knockout human cells to explore ADAR1 substrates and function. ADAR1 primarily edited Alu elements in RNA polymerase II (pol II)-transcribed mRNAs, but not putative pol III-transcribed Alus. During the IFN response, ADAR1 blocked translational shutdown by inhibiting hyperactivation of PKR, a dsRNA sensor. ADAR1 dsRNA binding and catalytic activities were required to fully prevent endogenous RNA from activating PKR. Remarkably, ADAR1 knockout neuronal progenitor cells exhibited MDA5 (dsRNA sensor)-dependent spontaneous interferon production, PKR activation, and cell death. Thus, human ADAR1 regulates sensing of self versus nonself RNA, allowing pathogen detection while avoiding autoinflammation.

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Crossref · 10.1016/j.cell.2017.12.038

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  • Major sources of dsRNA, inverted Alu repeats, are normally deaminated by ADAR to reduce their double-stranded character; decreased processing can be sensed by MDA5, resulting in IFN-I activation.

    “Major sources of dsRNA, inverted Alu repeats, are normally deaminated by ADAR to reduce their double-stranded character; decreased processing can be sensed by MDA5, resulting in IFN-I activation50, 51, 98.”

    From The role of retrotransposable elements in ageing and age-associated diseases (2021) · cites this paper as [50]

    The Results (page unavailable) show that ADAR1 edits Alu elements and that loss of ADAR1 in neuronal progenitor cells leads to MDA5-mediated IFNβ production. The paper also says inverted Alu elements can form dsRNA, but it does not establish that they are the major source of dsRNA or directly show that editing reduces their double-stranded character; the Introduction presents destabilization as a hypothesis. (LLM, conf=0.84)

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Authors
Chung, H., Calis, J. J. A., Wu, X., Sun, T., Yu, Y., Sarbanes, S. L., Dao Thi, V. L., Shilvock, A. R., Hoffmann, H.-H., Rosenberg, B. R., & Rice, C. M.
Affiliations
Rockefeller University (US)
Corresponding author
Rice, Charles M.
Venue
Cell
Publisher
Elsevier BV
Published
2018-02
Volume
172
Issue
4
Pages
811-824.e14
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2784970793
Cited by
538
References
55
Citations by year
2026: 53 · 2025: 69 · 2024: 67 · 2023: 71 · 2022: 64 · 2021: 74 · 2020: 60 · 2019: 44 · 2018: 36
FWCI
19.03
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • NIAID/NIH (R01-AI091707, F32AI114211)
  • John C. Whitehead Presidential Fellowship
  • Netherlands Organization for Scientific Research
  • Helmsley postdoctoral fellowship
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA regulation and disease
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
Keywords
ADAR1, Aicardi-Goutières syndrome, type I interferon, dsRNA sensing, PKR, MDA5, Alu elements, RNA editing, autoinflammation, neural progenitor cells, cell death, RNA polymerase II transcripts
MeSH terms
Interferon-Induced Helicase, IFIH1, Adenosine Deaminase, Humans, Inflammation, Nervous System Malformations, RNA Polymerase II, RNA, Double-Stranded, Protein Biosynthesis, RNA-Binding Proteins, Cell Death, eIF-2 Kinase, Alu Elements, Autoimmune Diseases of the Nervous System, Gene Knockout Techniques, HEK293 Cells, Neural Stem Cells

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