1. Apoptosis-inducing factor (AIF) nuclear translocation mediated caspase-independent mechanism involves in X-ray-induced MCF-7 cell death.
- Author
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Yang, Shana, Huang, Jianrong, Liu, Pan, Li, Jianhua, and Zhao, Shenting
- Subjects
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APOPTOSIS inducing factor , *RADIOTHERAPY , *BREAST cancer treatment , *CASPASE inhibitors , *WESTERN immunoblotting - Abstract
Purpose:Breast cancer is the most common cancer among women and radiotherapy is a conventional therapy following surgery. Previous studies have demonstrated that except the caspase-dependent pathway, caspase-independent pathway is also involved in the cell death responding to irradiation, despite the unclear mechanism. The purpose of the present study was to observe the role of apoptosis-inducing factor (AIF), the first identified caspase-independent molecule, in X-ray-induced breast cancer cell (MCF-7) cell death. Materials and methods:In this study, WST-1 assay, DAPI nuclear staining and clonogenic survival assay were used to test the cell response to different treatments; Western blot was used to detect the protein expression; RT-PCR and plasmid transfection were used to observe the role of AIF. Results:X-ray-induced AIF transferred from the mitochondrion to the nucleus. Inhibition of AIF expression reduced X-ray-induced MCF-7 cell death. Further, AIF nuclear translocation is in a caspase-independent manner in this process, but not caspase-dependent manner. Conclusions:The present study revealed that AIF nuclear translocation proceeded in X-ray-induced MCF-7 cell death in a caspase-independent manner. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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