1097-Mosaic Chromosomal Alterations in Aging Blood Genome

Researchers utilized whole-genome sequencing to investigate mosaic chromosomal alterations (mCAs) within the blood of nearly half a million participants from the UK Biobank. By developing a high-resolution computational method, the study identified over 43,000 alterations, revealing a significant increase in detection sensitivity compared to traditional techniques. This approach uncovered numerous genomic hotspots for short mutations and provided insights into the DNA-repair mechanisms that drive these changes as people age. The findings highlight how specific chromosomal deletions are linked to chronic lymphocytic leukemia, offering new potential for clinical screening. Additionally, the research identifies inherited genetic variants that influence the expansion of these mutations, illustrating the predictable ways in which the blood genome evolves over a lifetime.

References:

• Tang D, Kamitaki N, Mukamel R E, et al. Patterns and drivers of 43,617 mosaic chromosomal alterations in blood[J]. Nature Genetics, 2026: 1-12.