MIR-137 regulates the tumorigenicity of colon cancer stem cells through the inhibition of DCLK1

Masazumi Sakaguchi, Shigeo Hisamori, Nobu Oshima, Fumiaki Sato, Yohei Shimono, Yoshiharu Sakai

研究成果: Article査読

53 被引用数 (Scopus)

抄録

miRNAs have important roles in regulating cancer stem cell (CSC) properties and are considered to be potential therapeutic targets. However, few studies have focused onmiRNAs which are specifically related to colon CSCs. Here, a PCR-based miRNA profiling analysis of normal colon stem cells (NCSC) and colon CSCs (EpCAM+/CD44+/CD66a-) identified miRNAs which regulate colon CSC properties. Interestingly, miRNA-137 (miR-137) expression was downregulated in the colon CSCs compared with NCSCs, while doublecortin-like kinase 1 (DCLK1) mRNA was highly expressed in the colon CSCs but low in the NCSCs. In fact, DCLK1-positive cancer cells were widely distributed in clinically resected colon cancer specimens, while DCLK1-positve epithelial cells were rarely detected in normal colon tissues including the crypt bottoms. Luciferase assay and immunoblot analysis revealed that miR-137 regulated DCLK1 gene expression. Transduction of exogenous miR-137 suppressed the development of colon cancer organoids in vitro and the tumorigenicity of colon cancer cells in vivo without affecting the growth of normal intestinal organoids. Furthermore, the suppression of miR-137 enhanced the organoid development of normal colon cells. These data demonstrate that miR-137 has the capacity to suppress the tumorigenicity of colon CSCs and that maintained expression of miR-137 in NCSCs contributes to suppressing uncontrolled cell proliferation through the inhibition of DCLK1 expression.

本文言語English
ページ(範囲)354-362
ページ数9
ジャーナルMolecular Cancer Research
14
4
DOI
出版ステータスPublished - 04-2016
外部発表はい

All Science Journal Classification (ASJC) codes

  • 分子生物学
  • 腫瘍学
  • 癌研究

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