Construction and analysis of competing endogenous RNA network of MCF‑7 breast cancer cells based on the inhibitory effect of 6‑thioguanine on cell proliferation

Published on Dec 10, 2020in Oncology Letters2.311
· DOI :10.3892/OL.2020.12365
Hao Li1
Estimated H-index: 1
(JLU: Jilin University),
Xinglan An10
Estimated H-index: 10
(JLU: Jilin University)
+ 2 AuthorsZiyi Li14
Estimated H-index: 14
(JLU: Jilin University)
Previous research has proven that 6-thioguanine (6-TG) inhibits the growth of MCF-7 breast cancer cells. Accumulating evidence indicates that long non-coding (lnc)RNAs are involved in the development of various cancer types as competitive endogenous (ce)RNA molecules. The present study was conducted to investigate the regulatory mechanism underlying the function of lncRNAs as ceRNA molecules in MCF-7 cells and to identify more effective prognostic biomarkers for breast cancer treatment. The expression profiles of lncRNAs in untreated MCF-7 cells and 6-TG-treated MCF-7 cells were compared by RNA-seq. The regulatory associations among lncRNAs, micro (mi)RNAs and mRNAs were analyzed and verified by the TargetScan, miRDB and miRTarBas databases. The ceRNA networks were constructed by Cytoscape. The expression levels of two lncRNAs and two miRNAs in the ceRNA network were measured by reverse transcription-quantitative PCR. The OncoLnc and Kaplan-Meier plotter network databases were utilized to determine the effects of lncRNA and miRNA expression on the survival of patients with breast cancer. A ceRNA network was constructed for MCF-7 breast cancer cells treated with 6-TG, and this network may provide valuable information for further research elucidating the molecular mechanism underlying the effects of 6-TG on breast cancer. Moreover, LINC00324, MIR22HG, miR-370-3p and miR-424-5p were identified as potential prognostic and therapeutic biomarkers for breast cancer.
#1Lijuan Lyu (ZJU: Zhejiang University)H-Index: 4
#2Jia Yao (ZJU: Zhejiang University)H-Index: 4
Last. Zhijun Dai (ZJU: Zhejiang University)
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#2Yehui ShiH-Index: 1
Last. Zhongsheng TongH-Index: 1
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#1Tongtong Li (Dalian Medical University)H-Index: 2
#2Lele Xu (Dalian Medical University)H-Index: 1
Last. Xuefeng Liu (Dalian Medical University)H-Index: 4
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Background/Aims Esophageal squamous cell carcinoma (ESCC) is one of the most prevalent cancers with poor prognosis. Metastasis is the leading cause of cancer-related deaths. The growth arrest and DNA damage-inducible 45 gamma (GADD45G) has been reported to correlate with survival, invasion, and metastasis of ESCC. This study was aimed to investigate the role and mechanism of GADD45G in ESCC cell migration and invasion.
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#1Hao Li (JLU: Jilin University)H-Index: 1
#2Xinglan An (JLU: Jilin University)H-Index: 10
Last. Ziyi Li (JLU: Jilin University)H-Index: 14
view all 7 authors...
Background: 6-thioguanine (6-TG), as a conventional "ancient" drug for the treatment of acute leukemia, has been proved to have extensive anti-tumor roles. This study was created to investigate the hidden function of 6-TG on the MCF-7 breast cancer cell line (ER+, PR+) and its mechanisms. Methods: MCF-7 cells were treated with 6-TG, and the IC50 value was measured by a cell counting kit-8 assay. Differentially expressed genes (DEGs) were confirmed by RNA-seq analysis. Apoptosis and cell cycle co...
2 CitationsSource
#1Weijie Dai (Nanjing Medical University)H-Index: 7
#2Jiajie Zhou (Nanjing Medical University)H-Index: 1
Last. Wei Song (Nanjing Medical University)H-Index: 5
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Abstract Background Colorectal cancer (CRC) is one of the most common malignancies worldwide usually diagnosed at advanced stages which causes poor prognosis of patients. Therefore, novel diagnostic biomarkers and therapeutic targets are urgently needed. Materials and methods miR-424-5p was identified through integrated analysis of three public databases. Loss-of-function experiments in HT29 and SW480 cells and mouse xenograft models were performed to explore the regulatory role of miR-424-5p in...
11 CitationsSource
#1Xiaoli Liu (JLU: Jilin University)H-Index: 13
#2Yantao Fu (JLU: Jilin University)H-Index: 6
Last. Hui Sun (JLU: Jilin University)H-Index: 15
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Abstract miR-424-5p has been widely identified to function as an oncomiR in multiple human cancer types. However, the biological function of miR-424-5p in distant metastasis of thyroid cancer, as well as the underlying mechanism remains not clarified yet. In the current study, miR-424-5p expression was elucidated in 10 paired fresh thyroid cancer tissues and thyroid cancer dataset from TCGA. Lung metastasis colonization models in vivo and functional assays in vitro were used to determine the rol...
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#1Ni X (SHU: Shanghai University)H-Index: 1
#2Xie JkH-Index: 1
Last. Song HrH-Index: 1
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OBJECTIVE: Increasing evidence demonstrated that long non-coding RNA (lncRNA) played a vital role in human tumorigenesis and progression, including colorectal cancer (CRC). However, the underlying mechanisms are still largely unknown. The aim of this study was to investigate the function of lncRNA LINC00324 on the development of CRC and explore the possible mechanisms. MATERIALS AND METHODS: The expression level of LINC00324 and miR-214-3p was measured by quantitative real time polymerase chain ...
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Long non‐coding RNAs (lncRNAs), which competitively bind miRNAs to regulate target mRNA expression in the competing endogenous RNAs (ceRNAs) network, have attracted increasing attention in breast cancer research. We aim to find more effective therapeutic targets and prognostic markers for breast cancer. LncRNA, mRNA and miRNA expression profiles of breast cancer were downloaded from TCGA database. We screened the top 5000 lncRNAs, top 5000 mRNAs and all miRNAs to perform weighted gene co‐express...
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#1Chong Li (SJTU: Shanghai Jiao Tong University)H-Index: 4
#2Yaoyao Liang (SJTU: Shanghai Jiao Tong University)H-Index: 2
Last. Yuhong Xu (SJTU: Shanghai Jiao Tong University)H-Index: 31
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The Wnt signaling pathway is involved in tumorigenesis and various stages of tumor progression, including the epithelial-mesenchymal transition, metastasis, and drug resistance. Many efforts have been made to develop drugs targeting this pathway. CGX1321 is a porcupine inhibitor that can effectively block Wnt ligand synthesis and is currently undergoing clinical trials. However, drugs targeting the Wnt pathway may frequently cause adverse events in normal tissues, such as the intestine and skin....
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#1Xueyan Fu (PRC: China Medical University (PRC))H-Index: 2
#2Yawei Wang (PRC: China Medical University (PRC))H-Index: 4
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