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Article

Aberrant DNA methylation in the IFITM1 promoter enhances the metastatic phenotype in an intraperitoneal xenograft model of human ovarian cancer

  • Authors:
    • Nam Hee Kim
    • Hye Youn Sung
    • Eun Nam Choi
    • Dahyun Lyu
    • Hyuck Jae Choi
    • Woong Ju
    • Jung-Hyuck Ahn
  • View Affiliations / Copyright

    Affiliations: Department of Obstetrics and Gynecology, School of Medicine, Ewha Womans University, Yangcheon‑ku, Seoul 158-710, Republic of Korea, Department of Biochemistry, School of Medicine, Ewha Womans University, Yangcheon‑ku, Seoul 158-710, Republic of Korea, Department of Radiology and Research, Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, Songpa-ku, Seoul 138-736, Republic of Korea
  • Pages: 2139-2146
    |
    Published online on: March 24, 2014
       https://doi.org/10.3892/or.2014.3110
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Abstract

A lack of reliable biomarkers for the early detection and risk of metastatic recurrences makes ovarian cancer the most lethal gynecological cancer. To understand the molecular mechanisms involved in ovarian cancer metastasis in vivo, we analyzed the transcriptional expression pattern in metastatic implants of human ovarian carcinoma xenografts in mice. The expression of 937 genes was significantly different, by at least 2-fold, in the xenografts compared with that in SK-OV-3 cells. We investigated the mechanisms that regulate the expression of one of the profoundly upregulated genes, interferon-induced transmembrane protein 1 (IFITM1), in the metastatic implants. Specific CpG sites within the IFITM1 promoter were hypomethylated in the metastatic implants relative to those in the wild-type SK-OV-3 cells. Treating wild-type SK-OV-3 cells with the demethylating agent 5-aza-2'-deoxycytidine enhanced IFITM1 expression in a dose-dependent manner, implying transcriptional regulation by promoter methylation. We also found that IFITM1 overexpression caused increased migration and invasiveness in SK-OV-3 cells. Our results demonstrate that IFITM1 could be a novel metastasis-promoting gene that enhances the metastatic phenotype in ovarian cancer via epigenetic transcriptional regulation. Our findings also suggest that the status of DNA methylation within the IFITM1 promoter region could be a biomarker indicating metastatic progression in ovarian cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Kim NH, Sung HY, Choi EN, Lyu D, Choi HJ, Ju W and Ahn J: Aberrant DNA methylation in the IFITM1 promoter enhances the metastatic phenotype in an intraperitoneal xenograft model of human ovarian cancer. Oncol Rep 31: 2139-2146, 2014.
APA
Kim, N.H., Sung, H.Y., Choi, E.N., Lyu, D., Choi, H.J., Ju, W., & Ahn, J. (2014). Aberrant DNA methylation in the IFITM1 promoter enhances the metastatic phenotype in an intraperitoneal xenograft model of human ovarian cancer. Oncology Reports, 31, 2139-2146. https://doi.org/10.3892/or.2014.3110
MLA
Kim, N. H., Sung, H. Y., Choi, E. N., Lyu, D., Choi, H. J., Ju, W., Ahn, J."Aberrant DNA methylation in the IFITM1 promoter enhances the metastatic phenotype in an intraperitoneal xenograft model of human ovarian cancer". Oncology Reports 31.5 (2014): 2139-2146.
Chicago
Kim, N. H., Sung, H. Y., Choi, E. N., Lyu, D., Choi, H. J., Ju, W., Ahn, J."Aberrant DNA methylation in the IFITM1 promoter enhances the metastatic phenotype in an intraperitoneal xenograft model of human ovarian cancer". Oncology Reports 31, no. 5 (2014): 2139-2146. https://doi.org/10.3892/or.2014.3110
Copy and paste a formatted citation
x
Spandidos Publications style
Kim NH, Sung HY, Choi EN, Lyu D, Choi HJ, Ju W and Ahn J: Aberrant DNA methylation in the IFITM1 promoter enhances the metastatic phenotype in an intraperitoneal xenograft model of human ovarian cancer. Oncol Rep 31: 2139-2146, 2014.
APA
Kim, N.H., Sung, H.Y., Choi, E.N., Lyu, D., Choi, H.J., Ju, W., & Ahn, J. (2014). Aberrant DNA methylation in the IFITM1 promoter enhances the metastatic phenotype in an intraperitoneal xenograft model of human ovarian cancer. Oncology Reports, 31, 2139-2146. https://doi.org/10.3892/or.2014.3110
MLA
Kim, N. H., Sung, H. Y., Choi, E. N., Lyu, D., Choi, H. J., Ju, W., Ahn, J."Aberrant DNA methylation in the IFITM1 promoter enhances the metastatic phenotype in an intraperitoneal xenograft model of human ovarian cancer". Oncology Reports 31.5 (2014): 2139-2146.
Chicago
Kim, N. H., Sung, H. Y., Choi, E. N., Lyu, D., Choi, H. J., Ju, W., Ahn, J."Aberrant DNA methylation in the IFITM1 promoter enhances the metastatic phenotype in an intraperitoneal xenograft model of human ovarian cancer". Oncology Reports 31, no. 5 (2014): 2139-2146. https://doi.org/10.3892/or.2014.3110
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