Subtopic Deep Dive

ADAR RNA editing in innate immunity and antiviral responses
Research Guide

What is ADAR RNA editing in innate immunity and antiviral responses?

ADAR RNA editing in innate immunity and antiviral responses refers to the process where ADAR deaminases convert adenosine to inosine in viral and endogenous RNAs to modulate RIG-I/MDA5 sensing and interferon signaling.

ADAR1 edits dsRNA to prevent excessive activation of innate immune sensors like RIG-I-like receptors during viral infections (Lamers et al., 2019, 256 citations). This editing distinguishes self from non-self RNA, averting autoinflammatory responses (Crowl et al., 2017, 222 citations). Over 10 papers from 2010-2022 detail these mechanisms, with key reviews citing 100-1500 times.

Curated Papers

Key Challenges

Why It Matters

ADAR1 editing suppresses interferon responses to endogenous RNAs, preventing type I interferonopathies like Aicardi-Goutières syndrome (Uggenti et al., 2019). In viral contexts, HCV exploits PKR and RIG-I modulation via ADAR to evade immunity (Arnaud et al., 2010, 117 citations). These insights guide antiviral therapies and vaccine designs targeting RNA editing to enhance immune discrimination (Rehwinkel and Gack, 2020; Hur, 2019). Dysregulation links to autoinflammatory diseases, informing immunomodulatory drugs.

Key Research Challenges

Self vs. Non-Self Discrimination

ADAR editing must differentiate viral from host dsRNA to avoid autoimmunity. Failure triggers interferonopathies (Crowl et al., 2017, 222 citations). Balancing antiviral defense with self-tolerance remains unresolved (Uggenti et al., 2019).

Viral Evasion of Editing

Viruses like HCV counteract ADAR1 via NS3/4A protease to sustain replication. This disrupts RIG-I signaling (Arnaud et al., 2010). Mechanisms of viral override need clarification (Onomoto et al., 2021).

Therapeutic Editing Modulation

Targeting ADAR1 risks inflammation or impaired development (Heraud-Farlow et al., 2017, 129 citations). Optimal editing levels for therapy are unknown. Delivery to immune cells poses barriers (Cui et al., 2022).

Essential Papers

RIG-I-like receptors: their regulation and roles in RNA sensing

Jan Rehwinkel, Michaela U. Gack · 2020 · Nature reviews. Immunology · 1.6K citations

RIG-I and Other RNA Sensors in Antiviral Immunity

Kwan T. Chow, Michael Gale, Yueh–Ming Loo · 2018 · Annual Review of Immunology · 423 citations

Pattern recognition receptors (PRRs) survey intra- and extracellular spaces for pathogen-associated molecular patterns (PAMPs) within microbial products of infection. Recognition and binding to cog...

Double-Stranded RNA Sensors and Modulators in Innate Immunity

Sun Hur · 2019 · Annual Review of Immunology · 401 citations

Detection of double-stranded RNAs (dsRNAs) is a central mechanism of innate immune defense in many organisms. We here discuss several families of dsRNA-binding proteins involved in mammalian antivi...

Regulation of RIG-I-like receptor-mediated signaling: interaction between host and viral factors

Koji Onomoto, Kazuhide Onoguchi, Mitsutoshi Yoneyama · 2021 · Cellular and Molecular Immunology · 388 citations

RNA modifications: importance in immune cell biology and related diseases

Lian Cui, Rui Ma, Jiangluyi Cai et al. · 2022 · Signal Transduction and Targeted Therapy · 344 citations

ADAR1: “Editor-in-Chief” of Cytoplasmic Innate Immunity

Mart M. Lamers, Bernadette G. van den Hoogen, Bart L. Haagmans · 2019 · Frontiers in Immunology · 256 citations

Specialized receptors that recognize molecular patterns such as double stranded RNA duplexes-indicative of viral replication-are potent triggers of the innate immune system. Although their activati...

Intracellular Nucleic Acid Detection in Autoimmunity

John T. Crowl, Elizabeth Gray, Kathleen Pestal et al. · 2017 · Annual Review of Immunology · 222 citations

Protective immune responses to viral infection are initiated by innate immune sensors that survey extracellular and intracellular space for foreign nucleic acids. The existence of these sensors rai...

Reading Guide

Foundational Papers

Start with Arnaud et al. (2010, 117 citations) for HCV-ADAR-PKR basics, then Peisley and Hur (2012) for dsRNA recognition mechanisms, as they establish core viral sensing principles.

Recent Advances

Lamers et al. (2019, 256 citations) for ADAR1's immune role; Rehwinkel and Gack (2020, 1550 citations) for RIG-I updates; Cui et al. (2022) for RNA mods in immunity.

Core Methods

A-to-I sequencing quantifies edits; RIG-I pulldowns assess binding; CRISPR ADAR1 knockouts test interferon phenotypes (Heraud-Farlow et al., 2017; Hur, 2019).

How PapersFlow Helps You Research ADAR RNA editing in innate immunity and antiviral responses

Discover & Search

Research Agent uses searchPapers and exaSearch to find ADAR1 editing papers like 'ADAR1: “Editor-in-Chief” of Cytoplasmic Innate Immunity' by Lamers et al. (2019), then citationGraph reveals connections to Rehwinkel and Gack (2020, 1550 citations) and findSimilarPapers uncovers related RIG-I reviews.

Analyze & Verify

Analysis Agent applies readPaperContent to extract ADAR-RIG-I interactions from Hur (2019), verifies claims with CoVe against Crowl et al. (2017), and uses runPythonAnalysis for statistical comparison of citation impacts or editing site frequencies with GRADE scoring for evidence strength in interferon pathway claims.

Synthesize & Write

Synthesis Agent detects gaps in viral evasion mechanisms across Arnaud et al. (2010) and Onomoto et al. (2021), flags contradictions in self-RNA sensing; Writing Agent employs latexEditText, latexSyncCitations for review drafting, latexCompile for PDF output, and exportMermaid for RIG-I/ADAR signaling diagrams.

Use Cases

"Extract and plot ADAR1 editing frequencies in immune vs. viral RNA from recent papers."

Research Agent → searchPapers → Analysis Agent → runPythonAnalysis (pandas/matplotlib on extracted data from Lamers et al., 2019) → plot of editing rates vs. interferon induction.

"Draft LaTeX review on ADAR in HCV evasion with citations."

Research Agent → citationGraph (Arnaud et al., 2010) → Synthesis Agent → gap detection → Writing Agent → latexEditText + latexSyncCitations + latexCompile → formatted PDF review.

"Find GitHub repos analyzing ADAR RNA-seq data for antiviral studies."

Research Agent → searchPapers (Cui et al., 2022) → Code Discovery → paperExtractUrls → paperFindGithubRepo → githubRepoInspect → curated code list for RNA editing pipelines.

Automated Workflows

Deep Research workflow scans 50+ papers like Rehwinkel (2020) and Hur (2019) for systematic ADAR-immunity review with structured report on RIG-I modulation. DeepScan applies 7-step analysis with CoVe checkpoints to verify editing mechanisms in Lamers (2019) vs. viral papers. Theorizer generates hypotheses on ADAR1 knockout effects from Heraud-Farlow (2017) and Crowl (2017).

Try Doxa for ADAR RNA editing in innate immunity and antiviral responses Research

Frequently Asked Questions

What is the definition of ADAR RNA editing in innate immunity?

ADAR deaminases edit adenosine to inosine in dsRNAs to prevent RIG-I/MDA5 overactivation, distinguishing self from viral RNA (Lamers et al., 2019).

What are key methods for studying ADAR in antiviral responses?

RNA-seq detects A-to-I edits; RIG-I binding assays measure immune evasion; PKR activation tests interferon control (Arnaud et al., 2010; Hur, 2019).

What are landmark papers?

Rehwinkel and Gack (2020, 1550 citations) on RIG-I regulation; Lamers et al. (2019, 256 citations) on ADAR1 as innate immunity editor; Arnaud et al. (2010, 117 citations) on HCV-PKR interference.

What open problems exist?

Precise self/non-self thresholds; therapeutic windows without autoimmunity; virus-specific editing inhibitors (Uggenti et al., 2019; Heraud-Farlow et al., 2017).