Cyclic hypoxia does not alter RAD51 expression or PARP inhibitor cell kill in tumor cells

Abstract Solid tumors contain regions of chronic and cyclic hypoxia. Chronic hypoxia can downregulate RAD51 and sensitize cells to PARP inhibition. Herein, we show that RAD51 expression, cell survival and toxicity to PARP inhibition is not affected under cyclic hypoxic conditions. This suggests that...

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Veröffentlicht in:Radiotherapy and oncology 2015-09, Vol.116 (3), p.388-391
Hauptverfasser: Kumareswaran, Ramya, Chaudary, Naz, Jaluba, Karolina, Meng, Alice, Sykes, Jenna, Borhan, Asm, Hill, Richard P, Bristow, Robert G
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Sprache:eng
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Zusammenfassung:Abstract Solid tumors contain regions of chronic and cyclic hypoxia. Chronic hypoxia can downregulate RAD51 and sensitize cells to PARP inhibition. Herein, we show that RAD51 expression, cell survival and toxicity to PARP inhibition is not affected under cyclic hypoxic conditions. This suggests that PARP inhibition may be selectively toxic in tumor sub-regions associated with chronic hypoxia.
ISSN:0167-8140
1879-0887
DOI:10.1016/j.radonc.2015.03.027