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@ARTICLE{Liew:179288,
author = {H. Liew$^*$ and S. Mein$^*$ and T. Tessonnier and A.
Abdollahi$^*$ and J. Debus$^*$ and I. Dokic$^*$ and A.
Mairani$^*$},
title = {{T}he {I}mpact of {S}ub-{M}illisecond {D}amage {F}ixation
{K}inetics on the {I}n {V}itro {S}paring {E}ffect at
{U}ltra-{H}igh {D}ose {R}ate in {UNIVERSE}.},
journal = {International journal of molecular sciences},
volume = {23},
number = {6},
issn = {1422-0067},
address = {Basel},
publisher = {Molecular Diversity Preservation International},
reportid = {DKFZ-2022-00570},
pages = {2954},
year = {2022},
note = {#EA:E050#LA:E210#},
abstract = {The impact of the exact temporal pulse structure on the
potential cell and tissue sparing of ultra-high dose-rate
irradiation applied in FLASH studies has gained increasing
attention. A previous version of our biophysical mechanistic
model (UNIVERSE: UNIfied and VERSatile bio response Engine),
based on the oxygen depletion hypothesis, has been extended
in this work by considering oxygen-dependent damage fixation
dynamics on the sub-milliseconds scale and introducing an
explicit implementation of the temporal pulse structure. The
model successfully reproduces in vitro experimental data on
the fast kinetics of the oxygen effect in irradiated
mammalian cells. The implemented changes result in a
reduction in the assumed amount of oxygen depletion.
Furthermore, its increase towards conventional dose-rates is
parameterized based on experimental data from the
literature. A recalculation of previous benchmarks shows
that the model retains its predictive power, while the
assumed amount of depleted oxygen approaches measured
values. The updated UNIVERSE could be used to investigate
the impact of different combinations of pulse structure
parameters (e.g., dose per pulse, pulse frequency, number of
pulses, etc.), thereby aiding the optimization of potential
clinical application and the development of suitable
accelerators.},
keywords = {FLASH (Other) / UNIVERSE (Other) / electrons (Other) /
ionizing radiation (Other) / modeling (Other) / temporal
pulse structure (Other) / ultra-high dose rate (Other)},
cin = {E050 / E210 / HD01},
ddc = {540},
cid = {I:(DE-He78)E050-20160331 / I:(DE-He78)E210-20160331 /
I:(DE-He78)HD01-20160331},
pnm = {315 - Bildgebung und Radioonkologie (POF4-315)},
pid = {G:(DE-HGF)POF4-315},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:35328377},
pmc = {pmc:PMC8954991},
doi = {10.3390/ijms23062954},
url = {https://inrepo02.dkfz.de/record/179288},
}