Investigation of Regulatory Mechanisms and Functional Roles of Long Non-Coding RNA NDRG1-OT1 in Breast Cancer Cells
碩士 === 國立臺灣大學 === 生理學研究所 === 107 === Hypoxia is a classic feature of tumor microenvironment, which has profound effects on cancer progression and is tightly associated with poor prognosis. Long non-coding RNAs (lncRNAs), a member of non-coding genome, have been increasingly investigated due to their...
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ndltd-TW-107NTU051160032019-06-27T05:48:11Z http://ndltd.ncl.edu.tw/handle/pabs3j Investigation of Regulatory Mechanisms and Functional Roles of Long Non-Coding RNA NDRG1-OT1 in Breast Cancer Cells 探討長片段非編碼核糖核酸NDRG1-OT1在乳癌細胞中的調控機制與扮演的功能角色 Jun-Liang Luo 羅俊良 碩士 國立臺灣大學 生理學研究所 107 Hypoxia is a classic feature of tumor microenvironment, which has profound effects on cancer progression and is tightly associated with poor prognosis. Long non-coding RNAs (lncRNAs), a member of non-coding genome, have been increasingly investigated due to their diverse roles in tumorigenesis. Previously, our lab identified a hypoxia-induced lncRNA, NDRG1-OT1, in MCF-7 breast cancer cells using next-generation sequencing. However, the regulatory mechanism and functional roles of NDRG1-OT1 remain elusive. Therefore, the purpose of this study is to investigate the transcriptional mechanism and potential function roles of NDRG1-OT1 in breast cancer cells. Expression profiling of NDRG1-OT1 revealed that it was upregulated under hypoxia in different breast cancer cells. Over-expression and knockdown of HIF-1α up- and down-regulated NDRG1-OT1 respectively. Luciferase reporter assays and chromatin immunoprecipitation assays validated that HIF-1α transcriptionally activated NDRG1-OT1 by binding to its promoter (-1,773 to -1,769 and -647 to -643 bp). Next, to investigate whether NDRG1-OT1 could function as miRNA sponge, in silico analysis, expression profiling of predicted miRNAs, and RNA immunoprecipitation assays were performed, and the results implied that NDRG1-OT1 could not act as miRNA sponge. Lastly, regarding the function of NDRG1-OT1, ectopic expression of NDRG1-OT1 could not affect cell proliferation, migration, and cell cycle distribution under normoxia and hypoxia mimic conditions. In summary, our findings revealed a novel transcriptional mechanism of NDRG1-OT1 regulated by HIF-1α upon hypoxic condition in breast cancer cells. Liang-Chuan Lai 賴亮全 2018 學位論文 ; thesis 64 en_US |
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碩士 === 國立臺灣大學 === 生理學研究所 === 107 === Hypoxia is a classic feature of tumor microenvironment, which has profound effects on cancer progression and is tightly associated with poor prognosis. Long non-coding RNAs (lncRNAs), a member of non-coding genome, have been increasingly investigated due to their diverse roles in tumorigenesis. Previously, our lab identified a hypoxia-induced lncRNA, NDRG1-OT1, in MCF-7 breast cancer cells using next-generation sequencing. However, the regulatory mechanism and functional roles of NDRG1-OT1 remain elusive. Therefore, the purpose of this study is to investigate the transcriptional mechanism and potential function roles of NDRG1-OT1 in breast cancer cells. Expression profiling of NDRG1-OT1 revealed that it was upregulated under hypoxia in different breast cancer cells. Over-expression and knockdown of HIF-1α up- and down-regulated NDRG1-OT1 respectively. Luciferase reporter assays and chromatin immunoprecipitation assays validated that HIF-1α transcriptionally activated NDRG1-OT1 by binding to its promoter (-1,773 to -1,769 and -647 to -643 bp). Next, to investigate whether NDRG1-OT1 could function as miRNA sponge, in silico analysis, expression profiling of predicted miRNAs, and RNA immunoprecipitation assays were performed, and the results implied that NDRG1-OT1 could not act as miRNA sponge. Lastly, regarding the function of NDRG1-OT1, ectopic expression of NDRG1-OT1 could not affect cell proliferation, migration, and cell cycle distribution under normoxia and hypoxia mimic conditions. In summary, our findings revealed a novel transcriptional mechanism of NDRG1-OT1 regulated by HIF-1α upon hypoxic condition in breast cancer cells.
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author2 |
Liang-Chuan Lai |
author_facet |
Liang-Chuan Lai Jun-Liang Luo 羅俊良 |
author |
Jun-Liang Luo 羅俊良 |
spellingShingle |
Jun-Liang Luo 羅俊良 Investigation of Regulatory Mechanisms and Functional Roles of Long Non-Coding RNA NDRG1-OT1 in Breast Cancer Cells |
author_sort |
Jun-Liang Luo |
title |
Investigation of Regulatory Mechanisms and Functional Roles of Long Non-Coding RNA NDRG1-OT1 in Breast Cancer Cells |
title_short |
Investigation of Regulatory Mechanisms and Functional Roles of Long Non-Coding RNA NDRG1-OT1 in Breast Cancer Cells |
title_full |
Investigation of Regulatory Mechanisms and Functional Roles of Long Non-Coding RNA NDRG1-OT1 in Breast Cancer Cells |
title_fullStr |
Investigation of Regulatory Mechanisms and Functional Roles of Long Non-Coding RNA NDRG1-OT1 in Breast Cancer Cells |
title_full_unstemmed |
Investigation of Regulatory Mechanisms and Functional Roles of Long Non-Coding RNA NDRG1-OT1 in Breast Cancer Cells |
title_sort |
investigation of regulatory mechanisms and functional roles of long non-coding rna ndrg1-ot1 in breast cancer cells |
publishDate |
2018 |
url |
http://ndltd.ncl.edu.tw/handle/pabs3j |
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