Harnessing R-loop dynamics: Challenging cancer therapy resistance

Area of Science:

• Molecular Biology
• Genetics
• Cancer Research

Background:

• R-loops are DNA:RNA hybrid structures critical for gene regulation and DNA replication.
• Proper R-loop regulation is essential for maintaining genome stability.
• Aberrant R-loop accumulation is a hallmark of cancer cells, linked to oncogene and tumor suppressor gene mutations.

Purpose of the Study:

• To review the role of R-loops in cancer biology.
• To discuss R-loop regulators in cancer cells.
• To explore therapeutic strategies targeting R-loops and resistance mechanisms.

Main Methods:

• Literature review of R-loop functions in normal and cancer cells.
• Analysis of R-loop involvement in DNA damage, replication, and epigenetic regulation.
• Examination of R-loop-targeting cancer therapies and resistance pathways.

Main Results:

• Unscheduled R-loops induce DNA damage and compromise genome stability.
• Altered R-loop levels in cancer disrupt physiological processes and drive genomic instability.
• Antineoplastic drugs targeting R-loops can exacerbate instability but also induce cell death.

Conclusions:

• R-loops are key players in cancer development and progression.
• Therapeutic strategies aimed at modulating R-loops show promise in cancer treatment.
• Understanding R-loop dynamics is crucial for overcoming therapy resistance in cancer.