Three common chemotherapy drugs cause DNA mutations not only in mice that receive treatment, but also in their offspring, according to a study published today in the Proceedings of the National Academy of Sciences USA1. The results suggest that the genome in treated mice became destabilized yielding new mutations long after exposure to the drugs has ceased. A similar phenomenon has been observed in mice exposed to radiation. Genomic damage can be seen in the offspring of mice who have received chemotherapy drugs. PAUL WOOTTON/SCIENCE PHOTO LIBRARY The work emphasizes the importance of looking at the effects of chemotherapy not only on recipients, but also on their descendants, but Yuri Dubrova, a geneticist at the University of Leicester, UK, who led the study, cautions against extrapolating the results of this study to humans. Most adults treated for cancer are either too old to have children or become sterile from the treatment. “So we’re talking about one group only: childhood cancer survivors,” says Dubrova. One recent study found no significant impact of radiation or chemotherapy on the rate of birth defects in 4,699 children of childhood cancer survivors2. Furthermore, children who are treated for cancer will not have children of their own … Continue reading
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