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miR-190 enhances endocrine therapy sensitivity by regulating SOX9 expression in breast cancer.
- Source :
- Journal of Experimental & Clinical Cancer Research (17569966); 1/18/2019, Vol. 38 Issue 1, pN.PAG-N.PAG, 1p
- Publication Year :
- 2019
-
Abstract
- Background: Breast cancer is the most common cancer among women worldwide, and approximately 70% of breast cancers are hormone receptor-positive and express estrogen receptor-α (ERα) or/and progesterone receptor. Therapies targeting ERα have been successfully used in patients with ERα<superscript>+</superscript> breast cancer. However, intrinsic or acquired resistance to anti-estrogen therapy presents a major challenge. The Wnt/β-catenin signaling pathway regulates various processes that are important for cancer progression, and emerging evidences have shown a close interaction between Wnt/β-catenin and ERα signaling. miR-190 is also involved in ER signaling and our previous study indicated that miR-190 suppresses breast cancer metastasis. Methods: The effect of miR-190 on breast cancer anti-estrogen sensitivity was investigated both in vitro and in vivo. The protein expression levels and localization were analyzed by western blotting and immunofluorescence, respectively. Chromatin immunoprecipitation and dual-luciferase reporter assays were used to validate the regulation of the zinc-finger E-box binding homeobox 1/ ERα-miR-190-SRY-related high mobility group box 9 (ZEB1/ERα-miR-190-SOX9) axis. Results: miR-190 increased the anti-estrogen sensitivity of breast cancer cells both in vitro and in vivo. miR-190 inhibited Wnt/β-catenin signaling by targeting SOX9, and its expression inversely correlated with that of SOX9 in breast cancer samples. Furthermore, ERα and ZEB1 competitively regulated miR-190 expression. Conclusions: Our data uncover the ZEB1/ERα-miR-190-SOX9 axis and suggest a mechanism by which the Wnt/β-catenin signaling pathway is involved in breast cancer anti-estrogen therapy. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17569966
- Volume :
- 38
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Journal of Experimental & Clinical Cancer Research (17569966)
- Publication Type :
- Academic Journal
- Accession number :
- 134228340
- Full Text :
- https://doi.org/10.1186/s13046-019-1039-9