LncRNA HOTTIP facilitates the stemness of breast cancer via regulation of miR-148a-3p/WNT1 pathway

被引：50

作者：

Han, Li ^{[1
,2
]}

Yan, Yuanyuan ^{[1
,2
]}

Zhao, Lin ^{[1
,2
]}

Liu, Yinuo ^{[1
,2
]}

Lv, Xuemei ^{[1
,2
]}

Zhang, Liwen ^{[1
,2
]}

Zhao, Yanyun ^{[1
,2
]}

Zhao, Haishan ^{[1
,2
]}

He, Miao ^{[1
,2
]}

Wei, Minjie ^{[1
,2
]}

机构：

[1] China Med Univ, Sch Pharm, Dept Pharmacol, 77 Puhe Rd, Shenyang 110122, Liaoning, Peoples R China

[2] China Med Univ, Liaoning Key Lab Mol Targeted Antitumor Drug Dev, Liaoning Canc Immune Peptide Drug Engn Technol Re, Key Lab Precis Diag & Treatment Gastrointestinal, Shenyang, Peoples R China

来源：

JOURNAL OF CELLULAR AND MOLECULAR MEDICINE | 2020年 / 24卷 / 11期

基金：

中国国家自然科学基金;

关键词：

breast cancer; HOXA transcript at the distal tip (HOTTIP); miR-148a-3p; stemness; WNT1; NONCODING RNA HOTTIP; CELL LUNG-CANCER; DISEASE PROGRESSION; SIDE POPULATION; IDENTIFICATION; EXPRESSION; LIVER; CHEMORESISTANCE; PROLIFERATION; TUMORIGENESIS;

D O I：

10.1111/jcmm.15261

中图分类号：

Q2 [细胞生物学];

学科分类号：

071009 ; 090102 ;

摘要：

Emerging evidence suggests that dysregulation of long non-coding RNA (lncRNA) plays a key role in tumorigenesis. The lncRNA, HOXA transcript at the distal tip (HOTTIP), has been reported to be up-regulated in multiple cancers, including breast cancer, and is involved in various biological processes, including the maintenance of stemness. However, the biological function and underlying modulatory mechanism of HOTTIP in breast cancer stem cells (BCSCs) remains unknown. In this study, we found that HOTTIP was markedly up-regulated in BCSCs and had a positive correlation with breast cancer progression. Functional studies revealed that overexpression of HOTTIP markedly promoted cell clonogenicity, increased the expression of the stem cell markers, OCT4 and SOX2, and decreased the expression of the differentiation markers, CK14 and CK18, in breast cancer cells. Knockdown of HOTTIP inhibited the CSC-like properties of BCSCs. Consistently, depletion of HOTTIP suppressed tumour growth in a humanized model of breast cancer. Mechanistic studies demonstrated that HOTTIP directly binds to miR-148a-3p and inhibits the mediation of WNT1, which leads to inactivation of the Wnt/beta-catenin signalling pathway. Our study is the first to report that HOTTIP regulates the CSC-like properties of BCSCs by as a molecular sponge for miR-148a-3p to increase WNT1 expression, offering a new target for breast cancer therapy.

引用

页码：6242 / 6252

页数：11

共 47 条

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