TY  - JOUR
AU  - Johnson, K.
AU  - Chang-Claude, J.
AU  - Critchley, A-M
AU  - Kyriacou, C.
AU  - Lavers, S.
AU  - Rattay, T.
AU  - Seibold, P.
AU  - Webb, A.
AU  - West, C.
AU  - Symonds, R. P.
AU  - Talbot, C. J.
AU  - Azria, David
AU  - Brookes, Anthony
AU  - Burr, Tom
AU  - Chang-Claude, Jenny
AU  - Davidson, Susan
AU  - De Ruysscher, Dirk
AU  - Dunning, Alison
AU  - Elliott, Rebecca
AU  - Gutiérrez Enríquez, Sara
AU  - Lambin, Philippe
AU  - Rancati, Tiziana
AU  - Rosenstein, Barry
AU  - Seibold, Petra
AU  - Symonds, R Paul
AU  - Talbot, Chris
AU  - Thierens, Hubert
AU  - Valdagni, Riccardo
AU  - Vega, Ana
AU  - Veldeman, Liv
AU  - Wenz, Frederik
AU  - Yuille, Martin
AU  - West, Catharine
TI  - Genetic Variants Predict Optimal Timing of Radiotherapy to Reduce Side-effects in Breast Cancer Patients.
JO  - Clinical oncology
VL  - 31
IS  - 1
SN  - 0936-6555
CY  - [S.l.]
PB  - Saunders
M1  - DKFZ-2018-01830
SP  - 9-16
PY  - 2019
AB  - Radiotherapy is an important treatment for many types of cancer, but a minority of patients suffer long-term side-effects of treatment. Multiple lines of evidence suggest a role for circadian rhythm in the development of radiotherapy late side-effects.We carried out a study to examine the effect of radiotherapy timing in two breast cancer patient cohorts. The retrospective LeND cohort comprised 535 patients scored for late effects using the Late Effects of Normal Tissue-Subjective Objective Management Analytical (LENT-SOMA) scale. Acute effects were assessed prospectively in 343 patients from the REQUITE study using the CTCAE v4 scales. Genotyping was carried out for candidate circadian rhythm variants.In the LeND cohort, patients who had radiotherapy in the morning had a significantly increased incidence of late toxicity in univariate (P = 0.03) and multivariate analysis (P = 0.01). Acute effects in the REQUITE group were also significantly increased in univariate analysis after morning treatment (P = 0.03) but not on multivariate analysis. Increased late effects in the LeND group receiving morning radiotherapy were associated with carriage of the PER3 variable number tandem repeat 4/4 genotype (P = 6 × 10-3) and the NOCT rs131116075 AA genotype (P = 5 × 10-3).Our results suggest that it may be possible to reduce toxicity associated with breast cancer radiotherapy by identifying gene variants that affect circadian rhythm and scheduling for appropriate morning or afternoon radiotherapy.
LB  - PUB:(DE-HGF)16
C6  - pmid:30389261
DO  - DOI:10.1016/j.clon.2018.10.001
UR  - https://inrepo02.dkfz.de/record/141311
ER  -