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Int. J. Mol. Sci. 2016, 17(7), 1025; doi:10.3390/ijms17071025

CD133 Modulate HIF-1α Expression under Hypoxia in EMT Phenotype Pancreatic Cancer Stem-Like Cells

1
Division of Cancer and Regenerative Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan
2
Department of Surgical Oncology and Digestive Surgery, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan
3
Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Tronto, ON M5T 3M7, Canada
4
Department of Hematology and Immunology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan
5
Center for Innovative Therapy Research and Application, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan
6
Tanegashima Medical Center, 7463 Nishi-no-omote, Nishi-no-omote 891-3198, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Li Yang
Received: 28 April 2016 / Revised: 19 June 2016 / Accepted: 23 June 2016 / Published: 28 June 2016
(This article belongs to the Special Issue Tumor Microenvironment and Metabolism)
View Full-Text   |   Download PDF [1860 KB, uploaded 28 June 2016]   |  

Abstract

Although CD133 is a known representative cancer stem cell marker, its function in tumor aggressiveness under hypoxia is not fully known. The aim of this study is to demonstrate that CD133 regulates hypoxia inducible factor (HIF)-1α expression with tumor migration. The CD133+ pancreatic cancer cell line, Capan1M9, was compared with the CD133 cell line, shCD133M9, under hypoxia. HIF-1α expression levels were compared by Western blot, HIF-1α nucleus translocation assay and real-time (RT)-PCR. The hypoxia responsive element (HRE) was observed by luciferase assay. The migration ability was analyzed by migration and wound healing assays. Epithelial mesenchymal transition (EMT) related genes were analyzed by real-time RT-PCR. HIF-1α was highly expressed in Capan1M9 compared to shCD133M9 under hypoxia because of the high activation of HRE. Furthermore, the migration ability of Capan1M9 was higher than that of shCD133M9 under hypoxia, suggesting higher expression of EMT related genes in Capan1M9 compared to shCD133M9. Conclusion: HIF-1α expression under hypoxia in CD133+ pancreatic cancer cells correlated with tumor cell migration through EMT gene expression. Understanding the function of CD133 in cancer aggressiveness provides a novel therapeutic approach to eradicate pancreatic cancer stem cells. View Full-Text
Keywords: pancreatic cancer; CD133; cancer stem cell; HIF-1α; hypoxia; migration; EMT pancreatic cancer; CD133; cancer stem cell; HIF-1α; hypoxia; migration; EMT
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Maeda, K.; Ding, Q.; Yoshimitsu, M.; Kuwahata, T.; Miyazaki, Y.; Tsukasa, K.; Hayashi, T.; Shinchi, H.; Natsugoe, S.; Takao, S. CD133 Modulate HIF-1α Expression under Hypoxia in EMT Phenotype Pancreatic Cancer Stem-Like Cells. Int. J. Mol. Sci. 2016, 17, 1025.

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