Low-dose radiation-induced cell death in doxorubicin-sensitive leukemic K562 and resistant leukemic K562/Dox cancer cells associated with ferroptosis induction

Springer Science and Business Media LLC - Tập 15 - Trang 249-255 - 2023
Sakornniya Wattanapongpitak1,2, Suchart Kothan1,2, Singkome Tima3, Montree Tungjai1,2
1Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
2Center of Radiation Research and Medical Imaging, Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
3Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand

Tóm tắt

It has been reported that low-dose total body irradiation techniques can be applied to blood cancers such as leukemia. The aim of this study is to investigate the effect of low-dose radiation-induced cell death via ferroptosis phenomenon in doxorubicin-sensitive leukemic K562 and resistant leukemic K562/Dox cancer cells. The cells were irradiated with X-rays at total doses of 0, 0.02, 0.05, and 0.1 Gy. The cell viability was determined at 48 h post-irradiation. Other biological endpoints related to ferroptosis included intracellular reactive oxygen species (ROS) that were determined at 5, 10, and 30 min post-irradiation. Also, intracellular iron, lipid peroxidation, and glutathione peroxidase (GSH-Px) were determined at 1, 4, and 24 h post-irradiation. The results showed that cell viability significantly decreased in irradiated cells when compared to non-irradiated cells. Intracellular ROS, intracellular iron, and lipid peroxidation increased in irradiated cells at all harvest time points compared to non-irradiated cells. GSH-Px decreased in irradiated cells at all harvest time points compared to non-irradiated cells. These findings suggest that low-dose radiation can induce cell death in doxorubicin-sensitive leukemic K562 and resistant leukemic K562/Dox cancer cells through ferroptosis pathways.

Tài liệu tham khảo

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