Simultaneous PLK1 inhibition improves local tumour control after fractionated irradiation
Purpose - Polo-like kinase 1 (PLK1) plays an important role in mitotic progression, is frequently overexpressed and associated with a poor prognosis of cancer patients, thus providing a promising target in anticancer treatment. Aim of the current project was to evaluate the effect of the novel PLK1...
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| Main Authors: | , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
25 July 2013
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| In: |
Radiotherapy and oncology
Year: 2013, Volume: 108, Issue: 3, Pages: 422-428 |
| ISSN: | 1879-0887 |
| DOI: | 10.1016/j.radonc.2013.06.038 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.radonc.2013.06.038 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0167814013003174 
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| Author Notes: | Mechthild Krause, Berit Kummer, Andre Deparade, Wolfgang Eicheler, Dorothee Pfitzmann, Ala Yaromina, Leoni A. Kunz-Schughart, Michael Baumann |
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| 245 | 1 | 0 | |a Simultaneous PLK1 inhibition improves local tumour control after fractionated irradiation |c Mechthild Krause, Berit Kummer, Andre Deparade, Wolfgang Eicheler, Dorothee Pfitzmann, Ala Yaromina, Leoni A. Kunz-Schughart, Michael Baumann |
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| 520 | |a Purpose - Polo-like kinase 1 (PLK1) plays an important role in mitotic progression, is frequently overexpressed and associated with a poor prognosis of cancer patients, thus providing a promising target in anticancer treatment. Aim of the current project was to evaluate the effect of the novel PLK1 inhibitor BI 6727 in combination with irradiation. - Material and methods - In vitro proliferation and radiation cell survival assays as well as in vivo local tumour control assays after single treatment and combined radiation and drug application were carried out using the squamous cell carcinoma models A431 and FaDu. In addition, cell cycle phases were monitored in vitro and in vivo. - Results - BI 6727 showed a dose-dependent antiproliferative effect and an increase in the mitotic fraction. BI 6727 alone reduced clonogenic cell survival, while radiosensitivity in vitro (SF2) and in vivo (single-dose TCD50 under clamped hypoxia) was not affected. In contrast, local tumour control was significantly improved after application of BI 6727 simultaneously to fractionated irradiation (A431: TCD50=60.5Gy [95% C.I. 57; 63] after IR alone and <30Gy after combined treatment; FaDu: 49.5Gy [43; 56Gy] versus 32.9Gy [26; 40]). - Conclusions - Despite the lack of direct cellular radiosensitisation, PLK1 inhibition with BI 6727 during fractionated irradiation significantly improves local tumour control when compared to irradiation alone. This result is likely explained by a considerable effect on cell cycle and an independent cytotoxic potential of BI 6727. | ||
| 650 | 4 | |a Cell cycle | |
| 650 | 4 | |a Combined treatment | |
| 650 | 4 | |a Local tumour control | |
| 650 | 4 | |a PLK1 inhibition | |
| 650 | 4 | |a Radiotherapy | |
| 700 | 1 | |a Kummer, Berit |e VerfasserIn |4 aut | |
| 700 | 1 | |a Deparade, Andre |e VerfasserIn |4 aut | |
| 700 | 1 | |a Eicheler, Wolfgang |e VerfasserIn |4 aut | |
| 700 | 1 | |a Pfitzmann, Dorothee |e VerfasserIn |4 aut | |
| 700 | 1 | |a Yaromina, Ala |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kunz-Schughart, Leoni A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Baumann, Michael |d 1962- |e VerfasserIn |0 (DE-588)131385399 |0 (DE-627)508500222 |0 (DE-576)298443244 |4 aut | |
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