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    β-catenin nuclear translocation induced by HIF-1α overexpression leads to the radioresistance of prostate cancer

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    Author
    Luo, YONG; Li, MINGCHUAN; Zuo, XUEMEI; BASOURAKOS, SPYRIDON P.; Zhang, JIAO; Zhao, JIAHUI; Han, Yili; Lin, YUNHUA; Wang, YONGXING; Jiang, YONGGUANG; Lan, Ling
    Abstract
    Hypoxia-inducible factor-1α (HIF-1α) is known to play crucial roles in tumor radioresistance; however, the molecular mechanisms responsible for the promotion of tumor radioresistance by HIF-1α remain unclear. β-catenin is known to be involved in the metastatic potential of prostate cancer (PCa). In this study, to investigate the role of HIF-1α and β-catenin in the radioresistance of PCa, two PCa cell lines, LNCaP and C4-2B, were grouped as follows: Negative control (no treatment), HIF-1α overexpression group (transfected with HIF-1α overexpression plasmid) and β-catenin silenced group (transfected with HIF-1α plasmids and β-catenin-shRNA). Cell proliferation, cell cycle, cell invasion and radiosensitivity were examined under normal or hypoxic conditions. In addition, radiosensitivity was examined in two mouse PCa models (the LNCaP orthotopic BALB/c-nu mice model and the C4-2B subcutaneous SCID mice model). Our results revealed that in both the LNCaP and C4-2B cells, transfection with HIF-1α overexpression plasmid led to an enhanced β-catenin nuclear translocation, while β-catenin silencing inhibited β-catenin nuclear translocation. The enhanced β-catenin nuclear translocation induced by HIF-1α overexpression resulted in an enhanced cell proliferation and cell invasion, an altered cell cycle distribution, decreased apoptosis, and improved non-homologous end joining (NHEJ) repair under normal and irradiation conditions. Similar results were observed in the animal models. HIF-1α overexpression enhanced β-catenin nuclear translocation, which led to the activation of the β-catenin/NHEJ signaling pathway and increased cell proliferation, cell invasion and DNA repair. These results thus suggest that HIF-1α overexpression promotes the radioresistance of PCa cells.
    URI
    http://hdl.handle.net/10342/7942
    Date
    2018-03-16
    Citation:
    APA:
    Luo, YONG, & Li, MINGCHUAN, & Zuo, XUEMEI, & BASOURAKOS, SPYRIDON P., & Zhang, JIAO, & Zhao, JIAHUI, & Han, Yili, & Lin, YUNHUA, & Wang, YONGXING, & Jiang, YONGGUANG, & Lan, Ling. (March 2018). β-catenin nuclear translocation induced by HIF-1α overexpression leads to the radioresistance of prostate cancer. International Journal of Oncology, (52:6), p.1827-1840. Retrieved from http://hdl.handle.net/10342/7942

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    MLA:
    Luo, YONG, and Li, MINGCHUAN, and Zuo, XUEMEI, and BASOURAKOS, SPYRIDON P., and Zhang, JIAO, and Zhao, JIAHUI, and Han, Yili, and Lin, YUNHUA, and Wang, YONGXING, and Jiang, YONGGUANG, and Lan, Ling. "β-catenin nuclear translocation induced by HIF-1α overexpression leads to the radioresistance of prostate cancer". International Journal of Oncology. 52:6. (1827-1840.), March 2018. March 06, 2021. http://hdl.handle.net/10342/7942.
    Chicago:
    Luo, YONG and Li, MINGCHUAN and Zuo, XUEMEI and BASOURAKOS, SPYRIDON P. and Zhang, JIAO and Zhao, JIAHUI and Han, Yili and Lin, YUNHUA and Wang, YONGXING and Jiang, YONGGUANG and Lan, Ling, "β-catenin nuclear translocation induced by HIF-1α overexpression leads to the radioresistance of prostate cancer," International Journal of Oncology 52, no. 6 (March 2018), http://hdl.handle.net/10342/7942 (accessed March 06, 2021).
    AMA:
    Luo, YONG, Li, MINGCHUAN, Zuo, XUEMEI, BASOURAKOS, SPYRIDON P., Zhang, JIAO, Zhao, JIAHUI, Han, Yili, Lin, YUNHUA, Wang, YONGXING, Jiang, YONGGUANG, Lan, Ling. β-catenin nuclear translocation induced by HIF-1α overexpression leads to the radioresistance of prostate cancer. International Journal of Oncology. March 2018; 52(6) 1827-1840. http://hdl.handle.net/10342/7942. Accessed March 06, 2021.
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