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R-loop and diseases: the cell cycle matters.

Yuqin Xu1, Yue Jiao1, Chengbin Liu1

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Summary
This summary is machine-generated.

R-loops, RNA:DNA hybrids, can disrupt cell cycles and cause genomic instability. Understanding R-loop resolution factors is key to preventing cell death and disease.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • The cell cycle, essential for growth and reproduction, comprises G1, S, G2, and M phases, ensuring accurate DNA replication.
  • R-loops, RNA:DNA hybrids, are naturally occurring structures that can regulate gene expression but pose risks when accumulating aberrantly.
  • Aberrant R-loop accumulation leads to DNA damage, genomic instability, and cell cycle arrest, impacting cellular health.

Approach:

  • This review synthesizes current research on R-loop resolution factors across different cell cycle stages.
  • It examines the mechanisms by which these factors prevent R-loop buildup and maintain genomic integrity.
  • The review also explores the pathological consequences of mutations in R-loop resolving factors.

Key Points:

  • R-loops are ubiquitous RNA:DNA hybrids with significant roles in physiological processes.
  • Unresolved R-loops trigger DNA damage responses, activating cell cycle checkpoints and potentially leading to cell death.
  • Numerous factors are identified that resolve R-loops, safeguarding the genome.

Conclusions:

  • Detailed knowledge of R-loop resolution factors at various cell cycle phases is crucial for understanding cellular responses to R-loop stress.
  • Mutations in these factors are linked to disease onset and progression, highlighting their importance in human health.
  • Further research into R-loop resolution mechanisms offers therapeutic potential for diseases associated with genomic instability.