Platinum chemotherapy gives children's tissues an adult-level mutation load
Duplex sequencing shows platinum drugs raise mutation burdens in children's normal tissues to adult levels, and the liver carries a signature seen in no other tissue.
Childhood cancer survivors often develop late adverse effects, and chemotherapy-induced DNA damage has been suspected as a contributor. Researchers examined normal pediatric tissues using NanoSeq, a duplex sequencing method that can detect mutations from single DNA molecules.
Platinum-based drugs pushed the mutation burden of these healthy tissues up to levels typical of adults. In the liver, platinum exposure left a distinctive mutational signature that was not found in the other tissues examined. Gene-focused sequencing also showed a wide variety of protein-altering variants, some with possible functional impact, including variants in blood associated with leukemia development.
The abstract does not report sample size. It also frames the link to late effects as plausible rather than proven: the findings show that mutations accumulate, not that they cause later health problems.
Summary prepared with AI assistance from the published abstract and reviewed by a physician. Not medical advice. Learn more
