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Autophagy01:27

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Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
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Crosstalk between Autophagy and RLR Signaling.

Po-Yuan Ke1,2

  • 1Department of Biochemistry & Molecular Biology, Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.

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|March 29, 2023
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Summary

Autophagy, a cellular process, can aid viral replication by modulating retinoic acid-inducible gene I (RIG-I)-like receptor (RLR) signaling, impacting innate antiviral immunity. This review explores the interplay between autophagy and RLR immunity during viral infections.

Keywords:
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Area of Science:

  • Cellular Biology
  • Immunology
  • Virology

Background:

  • Autophagy regulates cellular metabolism and acts as a host defense against pathogens like viruses.
  • Viral infections trigger retinoic acid-inducible gene I (RIG-I)-like receptor (RLR) signaling, initiating the innate antiviral response through type I interferons.
  • Emerging evidence suggests viruses exploit autophagy to enhance their replication by influencing host cellular processes, including RLR-mediated immunity.

Purpose of the Study:

  • To provide an overview of the functional molecules and regulatory mechanisms of RLR antiviral immune response and autophagy.
  • To summarize current knowledge on the biological role of autophagy in regulating RLR antiviral signaling.
  • To discuss the molecular mechanisms governing the crosstalk between autophagy and RLR innate immunity.

Main Methods:

  • Literature review and synthesis of existing research on autophagy and RLR signaling.
  • Analysis of molecular mechanisms underlying the interaction between autophagy and RLR pathways.
  • Compilation of studies investigating the role of autophagy in viral replication and innate immunity.

Main Results:

  • Autophagy activation by viruses can promote viral replication.
  • Autophagy modulates RLR signaling, affecting the host's innate antiviral defense.
  • Complex molecular crosstalk exists between autophagy and RLR-mediated immunity.

Conclusions:

  • Autophagy plays a dual role in viral infections, potentially aiding replication while also being part of the host defense.
  • Understanding the autophagy-RLR interaction is crucial for developing antiviral strategies.
  • Further research into the molecular mechanisms of this crosstalk is warranted.