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Radiation Protection Dosimetry Advance Access originally published online on December 12, 2006
Radiation Protection Dosimetry 2006 122(1-4):260-265; doi:10.1093/rpd/ncl429
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Experimental techniques for studying bystander effects in vitro by high and low-LET ionising radiation

M. A. Hill1,*, D. L. Stevens1, M. Kadhim1, M. Blake-James2, A. J. Mill2 and D. T. Goodhead1

1 MRC Radiation and Genome Instability Unit, Harwell, Oxfordshire OX11 0RD, UK
2 University of Birmingham, School of Physics and Astronomy, Birmingham B15 2TT, UK

* Corresponding author: m.hill{at}har.mrc.ac.uk


  Abstract

Ionising radiation can induce responses within non-exposed neighbouring (bystander) cells which potentially have important implications on the estimates of risk from low dose or low dose rate exposures of ionising radiations. A range of strategies have been developed for investigating bystander effects in vitro for both high-LET alpha particles or low-LET ultrasoft X rays using either partial shielding (grids, half-shields and slits) or by using a co-culture system where two physically separated populations of cells can be cultured together, allowing one population of cells to be irradiated while the second population remains unirradiated. The techniques described provide a useful tool to study bystander effects and complement microbeam studies. Studies using these systems show significant increases in the unirradiated bystander cells for various end points including the induction of chromosomal instability in haemopoetic stem cells and transformation in CGL1 cells.


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