Long non‑coding RNA profile revealed by microarray indicates that lncCUEDC1 serves a negative regulatory role in breast cancer stem cells

Zhang,Fengchun; Ma,Yue; Xu,Liang; Xu,Haiyan; Xu,Yingchun; Yan,Ningning

doi:10.3892/ijo.2020.4960

Long non‑coding RNA profile revealed by microarray indicates that lncCUEDC1 serves a negative regulatory role in breast cancer stem cells

Authors:
- Fengchun Zhang
- Yue Ma
- Liang Xu
- Haiyan Xu
- Yingchun Xu
- Ningning Yan
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Affiliations: Department of Oncology, Suzhou Kowloon Hospital, Shanghai Jiaotong University School of Medicine, Suzhou, Jiangsu 215021, P.R. China, Department of Oncology, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China, The First Department of Prevention and Cure Centre of Breast Disease, The Third Hospital of Nanchang City, Nanchang, Jiangxi 330009, P.R. China, Department of Oncology, Suzhou Kowloon Hospital, Shanghai Jiaotong University School of Medicine, Suzhou, Jiangsu 215021, P.R. China, Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450002, P.R. China
Published online on: January 13, 2020 https://doi.org/10.3892/ijo.2020.4960
Pages: 807-820

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Abstract

Previous studies have demonstrated that long non‑coding RNAs (lncRNAs) are involved in breast cancer development, progression and metastasis. However, the association between lncRNAs and breast cancer stem cells (BCSCs) has been poorly explored. To address this issue, microarray analyses were performed to detect the lncRNA profile of BCSCs. In addition, bioinformatics analyses, including Gene Ontology and the Kyoto Encyclopedia of Genes and Genomes pathway analyses, were performed to explore the functional roles of lncRNAs in BCSCs. Lastly, loss of function assays were used to explore the potential function of lncRNA CUE domain containing 1 (lncCUEDC1). A total of 142 differentially expressed lncRNAs were identified. Among these, 25 were downregulated and 117 were upregulated in BCSCs compared with in non‑BCSCs. In addition, the present study revealed that the lncRNAs were largely associated with stemness‑related signaling pathways. Furthermore, it was demonstrated that lncCUEDC1 negatively regulated the phenotype and biological functions of BCSCs in vitro. Mechanistically, lncCUEDC1 could bind NANOG to inhibit the stemness. To the best of our knowledge, the present study was the first to established the lncRNA profile of BCSCs. These findings provided evidence for exploring the functions of lncRNAs in BCSCs and indicated that lncCUEDC1 is a prospective target in BCSCs.

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