Cited by 285interferon and immune responsesImmune Response and InflammationInvertebrate Immune Response Mechanisms

Nucleic Acid Immunity

Open access
Hartmann, G.·2017·Advances in Immunology

Abstract

Organisms throughout biology need to maintain the integrity of their genome. From bacteria to vertebrates, life has established sophisticated mechanisms to detect and eliminate foreign genetic material or to restrict its function and replication. Tremendous progress has been made in the understanding of these mechanisms which keep foreign or unwanted nucleic acids from viruses or phages in check. Mechanisms reach from restriction-modification systems and CRISPR/Cas in bacteria and archaea to RNA interference and immune sensing of nucleic acids, altogether integral parts of a system which is now appreciated as nucleic acid immunity. With inherited receptors and acquired sequence information, nucleic acid immunity comprises innate and adaptive components. Effector functions include diverse nuclease systems, intrinsic activities to directly restrict the function of foreign nucleic acids (e.g., PKR, ADAR1, IFIT1), and extrinsic pathways to alert the immune system and to elicit cytotoxic immune responses. These effects act in concert to restrict viral replication and to eliminate virus-infected cells. The principles of nucleic acid immunity are highly relevant for human disease. Besides its essential contribution to antiviral defense and restriction of endogenous retroelements, dysregulation of nucleic acid immunity can also lead to erroneous detection and response to self nucleic acids then causing sterile inflammation and autoimmunity. Even mechanisms of nucleic acid immunity which are not established in vertebrates are relevant for human disease when they are present in pathogens such as bacteria, parasites, or helminths or in pathogen-transmitting organisms such as insects. This review aims to provide an overview of the diverse mechanisms of nucleic acid immunity which mostly have been looked at separately in the past and to integrate them under the framework nucleic acid immunity as a basic principle of life, the understanding of which has great potential to advance medicine.

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Crossref · 10.1016/bs.ai.2016.11.001

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  • Signaling cascades start with sensors such as RIG-I and MDA5 for cytoplasmic dsRNA, cGAS and AIM2 for cytoplasmic DNA, and TLRs for nucleic acids in the endosomal compartment.

    “The signaling cascades start with a variety of sensors, such as RIG-I (retinoic acid-inducible gene I) and MDA5 (melanoma differentiation-associated protein 5) to detect cytoplasmic dsRNA, cGAS (cyclic GMP-AMP synthase) and AIM2 (absent in melanoma 2) to detect cytoplasmic DNA, and TLRs (toll-like receptors) to detect a variety of nucleic acids in the endosomal compartment91.”

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Authors
Hartmann, G.
Affiliations
University of Bonn (DE)
Corresponding author
Hartmann, G.
Venue
Advances in Immunology
Publisher
Elsevier
Published
2017
Volume
133
Pages
121-169
ISSN
0065-2776 (ISSN-L)
OpenAlex
W2562935390
Cited by
285
References
257
Citations by year
2026: 23 · 2025: 38 · 2024: 37 · 2023: 35 · 2022: 40 · 2021: 42 · 2020: 25 · 2019: 17 · 2018: 16 · 2017: 12
FWCI
30.47
Type
book chapter
Language
en
Open access
Locations
  • Advances in immunology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Deutsches Zentrum für Infektionsforschung
  • Deutsche Forschungsgemeinschaft
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Immunology and Microbiology › Immunology › Invertebrate Immune Response Mechanisms
Keywords
innate immunity, adaptive immunity, restriction-modification systems, CRISPR-Cas, RNA interference, nucleic acid sensing, antiviral defense, endogenous retroelements, sterile inflammation, autoimmunity, PKR, ADAR1, IFIT1, viral replication restriction, phage defense, helminth immunity
MeSH terms
Animals, Archaea, Bacteria, Cytotoxicity, Immunologic, Humans, Immunity, Innate, Nucleic Acids, Viruses, Retroelements, Evolution, Molecular, RNA Interference, Receptors, Pattern Recognition, Adaptive Immunity, CRISPR-Cas Systems

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