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Updated: Jan 12, 2026

Estimation of Telomeric Repeat-containing RNA from DNA/RNA Hybrid Complexes
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ADAR1 RNA-Editing Enzyme Regulates Telomeric R-Loop Formation.

Eito Ichihashi1, Mai Kubota1, Yusuke Shiromoto2

  • 1Graduate School of Biological Sciences, Tokyo University of Science, Chiba, Japan.

Methods in Molecular Biology (Clifton, N.J.)
|November 1, 2025
PubMed
Summary
This summary is machine-generated.

Adenosine deaminase acting on RNA (ADAR) enzymes edit RNA and can also affect DNA. This study details methods for measuring R-loop formation, a structure ADAR1 influences, impacting genome stability in cancer cells.

Keywords:
ADARAntibodyDNA:RNADot blotGenomic DNAR-loopS9.6 antibody

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Adenosine deaminase acting on RNA (ADAR) enzymes catalyze A-to-I RNA editing.
  • ADAR1 exhibits DNA editing activity on DNA:RNA hybrid strands.
  • R-loops are nucleic acid structures involving DNA:RNA hybrids, crucial in cellular processes.

Purpose of the Study:

  • To describe protocols for measuring R-loop accumulation and formation.
  • To highlight the role of ADAR1 in R-loop regulation.
  • To investigate ADAR1's impact on genome stability in cancer cells.

Main Methods:

  • Detailed protocols for R-loop measurement.
  • Analysis of ADAR1's interaction with DNA:RNA hybrids.
  • Assessment of genome stability in cancer cell models.

Main Results:

  • Established methods for quantifying R-loop structures.
  • Demonstrated ADAR1's role in modulating R-loop formation.
  • Linked ADAR1 activity to genome stability at telomeres in specific cancer contexts.

Conclusions:

  • ADAR1 plays a significant role in R-loop dynamics.
  • Accurate measurement of R-loops is essential for understanding genome stability.
  • Further research into ADAR1 and R-loops could offer therapeutic insights for cancer.