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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.9
- 수록면
- 272 - 276 (5page)
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HOX genes are transcription factors that play important roles in body patterning and cell fate specification during normal development. In previous study, we found aberrant overexpression of HOXB5 in breast cancer tissues and cell lines, and demonstrated that HOXB5 is important in regulation of cell proliferation, tamoxifen resistance, and invasiveness through the epithelial-mesenchymal transition (EMT). Although the relationship between HOXB5 and phenotypic changes in MCF7 breast cancer cells has been studied, the molecular function of HOXB5 as a transcription factor remains unclear. IL-6 has been reported to be involved in not only inflammation but also cancer progression, which is characterized by the increase of growth speed and invasiveness of tumor cells. In this study, we selected Interleukin-6 (IL-6) as HOXB5 putative downstream target gene and discovered that HOXB5 transcriptionally up-regulated the expression of IL-6 in HOXB5 overexpressing MCF7 cells. The upstream region (~1.2 kb) of IL-6 promoter turned out to contain several putative HOX consensus binding sites. Chromatin immunoprecipitation assay confirmed that HOXB5 directly binds to the promoter region of IL-6 and positively regulated the expression of IL-6. These data all together, indicate that HOXB5 promotes IL-6 transcription by actively binding to the putative binding sites located in the upstream region of IL-6, which enable to increase its promoter activity in MCF7 breast cancer cells.
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참고문헌 (21)
참고문헌 신청
Abe M, Hamada J, Takahashi O, Takahashi Y, Tada M, Miyamoto M, Morikawa T, Kondo S, Moriuchi T. Disordered expression of HOX genes in human non-small cell lung cancer. Oncology Reports. 2006. 15: 797-802.
Allison KH. Molecular pathology of breast cancer: what a pathologist needs to know. Journal Of Clinical Pathology. 2012. 138: 770-780.
Cillo C, Barba P, Freschi G, Bucciarelli G, Magli MC, Boncinelli E. HOX gene expression in normal and neoplastic human kidney. International Journal of Cancer. 1992. 51: 892-897.
Coussens LM, Zitvogel L, Palucka AK. Neutralizing tumorpromoting chronic inflammation: a magic bullet? Science. 2013. 339: 286-291.
Fessner A, Esser JS, Bluhm F, Grundmann S, Zhou Q, Patterson C, Bode C, Moser M. The transcription factor HoxB5 stimulates vascular remodelling in a cytokine-dependent manner. Cardiovascular Research. 2014. 101: 247-255.
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UCI(KEPA) : I410-ECN-0101-2018-510-001347568