Radiation-induced genomic instability and bystander effects: inter-related nontargeted effects of exposure to ionizing radiation

Sally A. Lorimore, Philip J. Coates, Eric G. Wright

    Research output: Contribution to journalReview articlepeer-review

    182 Citations (Scopus)

    Abstract

    The paradigm of genetic alterations being restricted to direct DNA damage after exposure to ionizing radiation has been challenged by observations in which cells that are not exposed to ionizing radiation exhibit responses typically associated with direct radiation exposure. These effects are demonstrated in cells that are the descendants of irradiated cells (radiation-induced genomic instability) or in cells that are in contact with irradiated cells or receive certain signals from irradiated cells (radiation-induced bystander effects). There is accumulating evidence that radiation-induced genomic instability may be a consequence of, and in some cell systems may also produce, bystander interactions involving intercellular signalling, production of cytokines and free-radical generation. These processes are also features of inflammatory responses that are known to have the potential for both bystander-mediated and persisting damage as well as for conferring a predisposition to malignancy. Thus, radiation-induced genomic instability and untargeted bystander effects may reflect inter-related aspects of inflammatory-type responses to radiation-induced stress and injury and contribute to the variety of pathological consequences of radiation exposures.
    Original languageEnglish
    Pages (from-to)7058-69
    Number of pages12
    JournalOncogene
    Volume22
    Issue number45
    DOIs
    Publication statusPublished - 2003

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