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The lncRNA microarray analysis in EZH2-overexpressing breast cancer cell MCF7

ABSTRACT: The lncRNA microarray analysis in EZH2-overexpressing breast cancer cell MCF7

PROVIDER: PRJNA614636 | ENA |

REPOSITORIES: ENA

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The lncRNA microarray analysis in EZH2-overexpressing breast cancer cell MCF7

Project description:To explore the potential target lncRNAs of EZH2 in breast cancer cells, we determined the lncRNA expression profiles in MCF7-control and MCF7-EZH2 overexpressing cells using lncRNA Microarray.

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Project description:Purpose: Increasing evidence suggests that epigenetic reprogramming contributes significantly to the development of endocrine therapy resistance in breast cancer. The goal of this work is to explore how the histone methyltransferase EZH2 interacts with ER signaling and drives the insensitiveness of breast cancer cells to the antagonistic effect of tamoxifen on ER activity. Therefore, we comprehensively analyzed the transcriptional program regulated by EZH2 in EZH2 overexpressed MCF-7 cells. Methods: MCF-7 cells between passage 142-144 were used for this assay. For mRNA-Seq, cells are infected with control empty vector (EV) or EZH2 expressing plasmid (EZH2) by lentivirus. Total RNA were extracted by TRIzol (Invitrogen) and libraries were constructed using Illumina TruSeq RNA Sample Prep Kit v2 (Cat.# RS-122-2001). Hiseq 3000 was used for sequencing.

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Project description:Abundant evidence has illustrated that long non-coding RNA (lncRNA) plays a vital role in the regulation of tumor development and progression. Most lncRNA have been proven to have biological and clinical significance in acute myeloid leukemia (AML), but further studies remain to be needed. In this study, we investigated lncRNA NR-104098 in AML and its specific mechanism. The microarray analysis was performed on NB4 cells. Based on the related analysis results, we identified that lncRNA NR-104098 is a suppressor gene that is significantly upregulated in AML cells. lncRNA NR-104098 could inhibit proliferation and induce differentiation in AML cells in vitro, and also play main role in the mouse xenografts. Mechanically, it was confirmed that lncRNA NR-104098 may effectively inhibit EZH2 transcription by directly binding E2F1 and recruiting E2F1 to EZH2 promoter. In addition, ATPR can significantly increase the expression of lncRNA NR-104098, whereas knocking down NR104098 can inhibit the inhibitory effect of ATPR on the proliferation and induction differentiation of AML cells. Taken together, these results lead to a deeper insight into the mechanism of ATPR induces AML differentiation and inhibits proliferation by inhibiting EZH2 on transcriptional level.

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