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@ARTICLE{Brzozowska:154584,
author = {Brzozowska, K. and Wojcik, A. and Kriehuber, R. and
Schmitz, Sabine},
title = {{C}omparison of {I}ndividual {R}adiosensitivity of {PBL}
from {P}rostate {C}ancer {P}atients and {H}ealthy {D}onors},
journal = {Radioprotection},
volume = {43},
number = {5},
issn = {1769-700X},
address = {Les Ulis},
publisher = {EDP Sciences},
reportid = {FZJ-2014-03878},
pages = {p.241},
year = {2008},
abstract = {Individual radiosensitivity is a biological feature
distributed heterogeneously withinthe population.
Approximately 10 $\%$ of people have an enhanced intrinsic
radiosensitvityand hence a higher risk for developing side
effects during radiotherapy. Theunderlying mechanisms remain
unclear. DNA repair deficiency and altered
apoptosischaracteristics are discussed to be markers for
radiosensitivity that can easilybe analysed in peripheral
blood lymphocytes (PBL). The aim of our study is tofind out
whether PBL from cancer patients with strong clinical side
effects underradiotherapy, as assessed clinically on the
basis of the RTOG/EORTC scale,show enhanced rates of double
strand breaks (dsb), decreased DNA repair capacityand
altered induction of apoptosis in vitro when compared to
lymphocytes frompatients without side effects and
age-matched healthy donors. Additionally, toinvestigate
whether the in vitro radiosensitivity of PBL is a marker of
prostatecancer predisposition the data of patients are
analysed versus the data of PBLcollected from healthy
donors. To achieve this goal blood samples are
collected,exposed to a dose of 1 Gy or 0.5 Gy and the
following biological endpoints are analysed:the initial
level of dsb and the repair kinetics (°-H2AX-Assay),
apoptosis(Annexin V-Assay) and the induction of
chromatid-type chromosomal aberrations(G2-Assay).
Preliminary results reveal that the maximum induction of
foci asmeasured by °-H2AX-Assay occurs 30 min after
irradiation. 24 h after irradiationthe amount of foci
declines to approximately control level. FACS data
confirmthese findings. First results derived from the
Annexin V-Assay show a significantincrease of early
apoptosis 24 h after irradiation compared to the controls.},
organization = {36th Annual Meeting of the European
Radiation Research Society, Tours
(France)},
cin = {S-US},
ddc = {530},
cid = {I:(DE-Juel1)S-US-20090406},
pnm = {899 - ohne Topic (POF2-899)},
pid = {G:(DE-HGF)POF2-899},
typ = {PUB:(DE-HGF)16},
doi = {10.1051/radiopro:2008664},
url = {https://juser.fz-juelich.de/record/154584},
}