REVEALING MOLECULAR MECHANISMS OF THE SYNCHROTRON RADIATION-INDUCED BYSTANDER EFFECT

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Radiotherapy, a major treatment for more than half of cancer patients, is based on the dogma that radiation kills targeted cells. The radiation-induced bystander effect, by which the neighbours of irradiated cells can also damaged, is a new paradigm. What is the "danger signal" which induces DNA damage in un-irradiated normal tissues, and what minimal volume of tissue needs to be irradiated to induce bystander damage? The answers could have a major impact on optimising radiotherapy treatment.