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Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology

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


PMID 25842967

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.