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Updated: Nov 15, 2025

Confocal Imaging of Double-Stranded RNA and Pattern Recognition Receptors in Negative-Sense RNA Virus Infection
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Confocal Imaging of Double-Stranded RNA and Pattern Recognition Receptors in Negative-Sense RNA Virus Infection

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Endogenous Double-Stranded RNA.

Shaymaa Sadeq1, Surar Al-Hashimi1, Carmen M Cusack1

  • 1Biosciences Institute, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK.

Non-Coding RNA
|March 6, 2021
PubMed
Summary
This summary is machine-generated.

Cellular defense systems distinguish between self and non-self double-stranded RNA (dsRNA). This discrimination is crucial for immunity against viruses while tolerating endogenous dsRNA, preventing autoimmune diseases and enabling cancer therapy.

Keywords:
antisense transcriptdouble-stranded RNA (dsRNA)innate immunityrepetitive DNA elements (RE)

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Area of Science:

  • Molecular Biology
  • Immunology
  • Genetics

Background:

  • Long non-coding RNAs (lncRNAs) originate from repetitive genomic elements, which also produce double-stranded RNA (dsRNA).
  • Cells possess intricate defense mechanisms to differentiate between endogenous dsRNA and exogenous viral dsRNA.
  • dsRNA is a critical molecular pattern recognized by cellular sensors, initiating immune responses and stress pathways.

Purpose of the Study:

  • To elucidate the cellular strategies for distinguishing endogenous dsRNA from viral dsRNA.
  • To understand the role of dsRNA sensing in innate immunity, autoimmune diseases, and cancer therapeutics.

Main Methods:

  • Analysis of lncRNA biogenesis and its association with repetitive elements.
  • Investigation of dsRNA localization (nucleus/mitochondria vs. cytoplasm).
  • Characterization of dsRNA sensor proteins and their recognition mechanisms (e.g., 5' phosphate, length).
  • Examination of downstream signaling pathways, including interferon signaling, caspase activation, and apoptosis.

Main Results:

  • Compartmentalization separates endogenous dsRNA (nucleus/mitochondria) from exogenous dsRNA (cytoplasm).
  • Cellular sensors detect specific features of dsRNA, such as the 5' phosphate group and length, rather than sequence.
  • dsRNA sensing triggers crucial cellular responses, including innate immunity, stress pathways, and apoptosis.

Conclusions:

  • The cell employs a multi-layered defense network to manage dsRNA, distinguishing self from non-self to maintain homeostasis.
  • Dysregulation of dsRNA sensing is linked to autoimmune diseases.
  • Targeting dsRNA sensing pathways holds potential for cancer treatment.