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Nuclear DNA Damage and Repair in Normal Ovarian Cells Caused by Epothilone B

  • Rogalska, Aneta (Department of Thermobiology, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz) ;
  • Marczak, Agnieszka (Department of Thermobiology, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz)
  • Published : 2015.10.06

Abstract

This study was designed to assess, whether a new chemotherapeutic microtubule inhibitor, Epothilone B (EpoB, Patupilone), can induce DNA damage in normal ovarian cells (MM14.Ov), and to evaluate if such damage could be repaired. The changes were compared with the effect of paclitaxel (PTX) commonly employed in the clinic. The alkaline comet assay technique and TUNEL assay were used. The kinetics of DNA damage formation and the level of apoptotic cells were determined after treatment with IC50 concentrations of EpoB and PTX. It was observed that PTX generated significantly higher apoptotic and genotoxic changes than EpoB. The peak was observed after 48 h of treatment when the DNA damage had a maximal level. The DNA damage induced by both tested drugs was almost completely repaired. As EpoB in normal cells causes less damage to DNA it might be a promising anticancer drug with potential for the treatment of ovarian tumors.

Keywords

Apoptosis;DNA damage;Epothilone B;Paclitaxel

Acknowledgement

Supported by : Ministry of Science and Higher Education

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