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The nuclear receptor TLX (NR2E1) inhibits growth and progression of triple-negative breast cancer

ABSTRACT: The nuclear receptor TLX (NR2E1) inhibits growth and progression of triple-negative breast cancer

PROVIDER: PRJNA803306 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17879868.fastq.gz	Fastqsanger.gz
	SRR17879869.fastq.gz	Fastqsanger.gz
	SRR17879870.fastq.gz	Fastqsanger.gz
	SRR17879871.fastq.gz	Fastqsanger.gz
	SRR17879872.fastq.gz	Fastqsanger.gz

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The nuclear receptor TLX (NR2E1) inhibits growth and progression of triple-negative breast cancer

Project description:Development of targeted therapies will be a critical step towards reducing the mortality associated with triple-negative breast cancer (TNBC). To achieve this, we searched for targets that met three criteria: (1) pharmacologically targetable, (2) expressed in TNBC, and (3) expression is prognostic in TNBC patients. Since nuclear receptors have a well-defined ligand-binding domain and are thus highly amenable to small-molecule intervention, we focused on this class of protein. Our analysis identified TLX (NR2E1) as a candidate. RNA-Seq analysis revealed that TLX reduced the expression of genes implicated in the pro-proliferative KRAS signaling pathway as well as epithelial-mesenchymal transition (EMT), a cellular program known to drive metastatic progression. Indeed, TLX overexpression significantly decreased cell proliferation, migration and invasion, and robustly decreased the metastatic capacity of TNBC cells in murine models. Taken together, our work indicates that TLX retards the progression of TNBC. Several ligands have been shown to regulate the transcriptional activity of TLX, providing a framework for the future development of this receptor for therapeutic intervention.

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FZD7 Plays a Critical Role in Triple Negative Breast Cancer Proliferation

Project description:Breast cancer is genetically and clinically heterogeneous. Triple negative cancer (TNBC) is a subtype of breast cancer usually associated with poor outcome and lack of benefit from target therapy. A pathway analysis in a microarray study was performed using TNBC compared with non-triple negative breast cancer (non-TNBC). Overexpression of several Wnt pathway genes, such as frizzled homolog 7 (FZD7), Low density lipoprotein receptor-related protein 6 (LRP6) and transcription factor 7 (TCF7) has been observed in TNBC. Focus was given to the Wnt pathway receptor, FZD7. To validate its function, inhibition of FZD7 using FZD7shRNA was carried out. Notably decreased cell proliferation, suppressed invasiveness and colony formation in triple negative MDA-MB-231 and BT-20 cells were observed. Mechanism study indicated that these effects occurred through silencing the canonical Wnt signaling pathway, as evidenced by loss of nuclear accumulation of ï?¢-catenin and decreased transcriptional activity of TCF7. In vivo study revealed that FZD7shRNA significantly suppressed the tumor formation in xenotransplation mice due to decrease cell proliferation. Our finding suggests that FZD7 involved canonical Wnt signaling pathway is essential for tumorigenesis of TNBC. Thus, FZD7 may be a biomarker and a potential therapeutic target for triple negative breast cancer. 14 pretreatment non-triple negative breast tumors compare with 5 triple negative breast tumor.

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