Document Type : Original Article
Razi Drug Research Centre, School of Medicine, Iran University of Medical Sciences, Tehran, Iran;Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
Department of Radiology Technology, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4Department of Medical Physics and Medical Engineering, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
This study intended to observe the effects of methoxyamine (Mx) on cytotoxic effects and DNA damage caused by 5-Fluorouracil (5-FU) in combination with gamma radiation in a human colon cancer cell line, HT29.
Materials and Methods
In this experimental study, HT29 cells were cultured as a monolayer and treated with different concentrations of 5-FU along with 1 mM Mx for 24 hours. Next, the cells were irradiated with 2 Gy gamma radiation. After the treatments, we assessed for DNA damage, cytotoxicity, and viability by alkaline comet, clonogenic survival, and trypan blue dye exclusion assays.
Cytotoxicity and DNA damage increased with increasing 5-FU concentration. The 1 mM Mx concentration had no significant effect on cytotoxicity and DNA damage from 5-FU; however, it increased the cytotoxic and genotoxic effects of different concentrations of 5-FU when used in combination with 2 Gy gamma radiation.
Mx combined with 5-FU enhanced the radiosensitivity of colon cancer cells.