Mechanisms and disease relevance of DNA break repair pathway choice.

DNA repair pathway choice between homologous recombination and non-homologous end joining is regulated by DNA end resection and specific repair factors.

• Why it matters: Understanding how cells select DNA repair pathways is crucial for elucidating mechanisms of genome stability and drug resistance in cancer.
• What they did: The review discusses how repair factors, regulators, and chromatin modifications influence pathway choice, focusing on the roles of BRCA1-BARD1 and 53BP1, and examines RNA-DNA hybrid processing.
• The result: Dysfunction in repair pathway choice is linked to tumorigenesis and chemotherapeutic resistance, highlighting potential targets for improving cancer treatments.