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Korean Society for Biochemistry and Molecular Biology (생화학분자생물학회)
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Ets-1 enhances tumor migration through regulation of CCR7 expression

  • Fang, Li-Wen (Department of Nutrition, I-Shou University) ;
  • Kao, Ying-Hsien (Department of Medical Research, E-Da Hospital, I-Shou University) ;
  • Chuang, Ya-Ting (Department of Medical Research, National Taiwan University Hospital) ;
  • Huang, Huey-Lan (Department of Bioscience Technology, College of Health Science, Chang Jung Christian University) ;
  • Tai, Tzong-Shyuan (Department of Medical Research, E-Da Hospital, I-Shou University)
  • Received : 2018.10.02
  • Accepted : 2018.12.23
  • Published : 2019.09.30
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Abstract

Ets-1 is a prototype of the ETS protein family. Members of the ETS protein family contain a unique ETS domain. Ets-1 is associated with cancer progression and metastasis in many types of cancer. Many studies have shown a link between elevated expression of Ets-1 in cancer biopsies and poor survival. CCR7 is a chemokine that binds to specific ligand CCL21/CCL19. CCR7 expression is associated with tumor metastasis and infiltration into lymph nodes. The objective of this study was to test whether Ets-1 could regulate CCR7 expression and enhance tumor metastasis. Our data showed that CCR7 expression was downregulated in Ets-1-deficient T cells upon T-cell stimulation. Overexpression of Ets-1 increased CCR7 expression in breast cancer cell lines. In contrast, knockdown of Ets-1 reduced CCR7 expression. Ets-1 could directly bind to CCR7 promoter and mediate CCR7 expression in luciferase reporter assays and chromatin immunoprecipitation assays. Transactivation activity of Ets-1 was independent of the Pointed domain of Ets-1. Ets-1 could also enhance $NF-{\kappa}B$ and CBP transactivation of CCR7 promoter. Our results also showed that Ets-1 could modulate cancer cell transmigration by altering CCR7 expression in transwell assay and wound healing assay. Taken together, our data suggest that Ets-1 can enhance CCR7 expression and contribute to tumor cell migration.

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References

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