Correlation between the radiation responses of fibroblasts cultured from individual patients and the risk of late reaction after breast radiotherapy
Late normal tissue toxicity varies widely between patients and limits breast radiotherapy dose. Here we aimed to determine its relationship to DNA damage responses of fibroblast cultures from individual patients. Thirty-five breast cancer patients, with minimal or marked breast changes after breast-...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
23 February 2016
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| In: |
Cancer letters
Year: 2016, Jahrgang: 374, Heft: 2, Pages: 324-330 |
| ISSN: | 1872-7980 |
| DOI: | 10.1016/j.canlet.2016.02.036 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1016/j.canlet.2016.02.036 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0304383516301045 
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| Verfasserangaben: | Otilia Nuta, Navita Somaiah, Sue Boyle, Melvin Lee Kiang Chua, Lone Gothard, John Yarnold, Kai Rothkamm, Carsten Herskind |
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| 245 | 1 | 0 | |a Correlation between the radiation responses of fibroblasts cultured from individual patients and the risk of late reaction after breast radiotherapy |c Otilia Nuta, Navita Somaiah, Sue Boyle, Melvin Lee Kiang Chua, Lone Gothard, John Yarnold, Kai Rothkamm, Carsten Herskind |
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| 520 | |a Late normal tissue toxicity varies widely between patients and limits breast radiotherapy dose. Here we aimed to determine its relationship to DNA damage responses of fibroblast cultures from individual patients. Thirty-five breast cancer patients, with minimal or marked breast changes after breast-conserving therapy consented to receive a 4 Gy test irradiation to a small skin field of the left buttock and have punch biopsies taken from irradiated and unirradiated skin. Early-passage fibroblast cultures were established by outgrowth and irradiated in vitro with 0 or 4 Gy. 53BP1 foci, p53 and p21/CDKN1A were detected by immunofluorescence microscopy. Residual 53BP1 foci counts 24 h after in vitro irradiation were significantly higher in fibroblasts from RT-sensitive versus RT-resistant patients. Furthermore, significantly larger fractions of p53- but not p21/CDKN1A-positive fibroblasts were found in cultures from RT-sensitive patients without in vitro irradiation, and 2 h and 6 d post-irradiation. Exploratory analysis showed a stronger p53 response 2 h after irradiation of fibroblasts established from patients with severe reaction. These results associate the radiation response of fibroblasts with late reaction of the breast after RT and suggest a correlation with severity. | ||
| 650 | 4 | |a 53BP1 | |
| 650 | 4 | |a Breast cancer | |
| 650 | 4 | |a Double-strand breaks | |
| 650 | 4 | |a Individual radiosensitivity | |
| 650 | 4 | |a Normal-tissue reaction | |
| 650 | 4 | |a p53 | |
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