It may be possible to use "stem cell shielding" to protect the body from the damaging effects of chemotherapy, early results from a US trial suggest.
Chemotherapy drugs try to kill rapidly dividing cancer cells, but they can also affect other healthy tissues such as bone marrow.
A study, in Science Translational Medicine, used genetically modified stem cells to protect the bone marrow.
Cancer Research UK said it was a "completely new approach".
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