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@ARTICLE{McFadden:147460,
author = {C. H. McFadden and S. Rahmanian$^*$ and D. B. Flint and S.
J. Bright and D. S. Yoon and D. J. O'Brien and A. Asaithamby
and A. Abdollahi$^*$ and S. Greilich$^*$ and G. O.
Sawakuchi},
title = {{I}solation of time dependent {DNA} damage induced by
energetic carbon ions and their fragments using fluorescent
nuclear track detectors.},
journal = {Medical physics},
volume = {47},
number = {1},
issn = {2473-4209},
address = {College Park, Md.},
publisher = {AAPM},
reportid = {DKFZ-2019-02542},
pages = {272-281},
year = {2020},
note = {2020 Jan;47(1):272-281.},
abstract = {High energetic carbon (C-) ion beams undergo nuclear
interactions with tissue producing secondary nuclear
fragments. Thus, at depth, C-ion beams are composed of a
mixture of different particles with different linear energy
transfer (LET) values. We developed a technique to enable
isolation of DNA damage response (DDR) in mixed radiation
fields using beam line microscopy coupled to fluorescence
nuclear track detectors (FNTDs).We imaged live cells on a
coverslip made of FNTDs right after C-ion, proton or photon
irradiation using an in-house built confocal microscope
placed in the beam path. We used the FNTD to link track
traversals with DNA damage and separated DNA damage induced
by primary particles from fragments.We were able to
spatially link physical parameters of radiation tracks to
DDR in live cells to investigate spatiotemporal DDR in
multi-ion radiation fields in real time, which was
previously not possible. We demonstrated that the response
of lesions produced by the high-LET primary particles
associates most strongly with cell death in a multi-LET
radiation field, and that this association is not seen when
analyzing radiation induced foci in aggregate without
primary/fragment classification.We report a new method that
uses confocal microscopy in combination with FNTDs to
provide sub-micrometer spatial-resolution measurements of
radiation tracks in live cells. Our method facilitates
expansion of the radiation-induced DDR research because it
can be used in any particle beam line including particle
therapy beam lines.},
cin = {E040 / E210 / HD01},
ddc = {610},
cid = {I:(DE-He78)E040-20160331 / I:(DE-He78)E210-20160331 /
I:(DE-He78)HD01-20160331},
pnm = {315 - Imaging and radiooncology (POF3-315)},
pid = {G:(DE-HGF)POF3-315},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31677156},
doi = {10.1002/mp.13897},
url = {https://inrepo02.dkfz.de/record/147460},
}