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Abstract Title:

Low doses ionizing radiation enhances the invasiveness of breast cancer cells by inducing epithelial-mesenchymal transition.

Abstract Source:

Biochem Biophys Res Commun. 2011 Aug 19 ;412(1):188-92. Epub 2011 Jul 23. PMID: 21810413

Abstract Author(s):

Xin Zhang, Xiaoyan Li, Ning Zhang, Qifeng Yang, Meena S Moran

Article Affiliation:

Department of Chemotherapy, Cancer Center, Qilu Hospital, Shandong University, School of Medicine, West Wenhua Road No. 107, Ji'nan, Shandong 250012, PR China.

Abstract:

Epithelial-mesenchymal transition (EMT) is a process cellular morphologic and molecular alterations facilitate cell invasion. We hypothesized that low dose ionizing irradiation (LDIR) enhances the invasiveness of breast cancer cells by inducing EMT. The effects of LDIR on cellular morphology and the EMT markers of MCF-7 breast cancer cells were analyzed by western blot/RT-PCR and migration/invasion was examined using the transwell assay. We found that LDIR led to the phenotypic changes of EMT in MCF-7 cells and down-regulation of epithelial differentiation markers and transcriptional induction of mesenchymal markers. Furthermore, the radiated cells demonstrated enhanced migration/invasion MCF-7 cells compared with non-radiated cells. In summary, LDIR promotes the invasiveness of breast cancer cells through epithelial to mesenchymal transition. These findings may ultimately provide a new targeted approach for improving the therapeutic effectiveness of radiation in breast cancer.

Study Type : In Vitro Study

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Sayer Ji
Founder of GreenMedInfo.com

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