Cardiff University Researchers Uncover Mechanism Behind Severe DNA Damage

Cardiff University researchers have identified the mechanism behind chromoanasynthesis, a severe form of DNA damage characterized by complex chromosome rearrangements. This process contributes to the development of cancer and inherited genetic conditions. The study was led by Dr. Greg Ngo and Professor Duncan Baird from Cardiff University's School of Medicine. Previously, the biological process driving these mutations was unclear.

Unraveling the DNA Repair Process

Using an advanced DNA sequencing technique, the team found that these mutations occur when DNA breaks during cell division. Dividing cells utilize a repair mechanism that reconnects broken strands using small segments of matching DNA.

Researchers discovered that two distinct DNA repair systems combine during this process, causing DNA-copying machinery to move erratically across the genome.

This can result in large sections of DNA being duplicated multiple times, forming the chaotic patterns associated with chromoanasynthesis.

Implications for Cancer Research and Diagnostics

Understanding this process is significant because these events can accelerate cancer development and influence tumor characteristics. The findings present new opportunities for medical research, including the potential development of drugs targeting these mechanisms and new diagnostic methods to detect these mutation signatures in early-stage disease.

Cancer Research UK supported the study, which was published in Nature Communications.