Project description:PRO-seq assay was performed to detect the function of Top1 in the activation of acutely activated phase-separated MegaTrans enhancers.
Project description:Long non-coding Rnas (lncRNAs) can act as oncogenes or tumor suppressors to regulate cancer development. We found that CYP1B1-AS1 was down-regulated in breast cancer tissues and correlated with the prognosis of patients. Lentiviral vectors were used to overexpress CYP1B1-AS1 in MCF7 cells, and the target proteins bound to CYP1B1-AS1 were detected by pulldown assay and mass spectrometry. The function of CYP1B1-AS1 is unknown. Our study revealed the molecular mechanism of CYP1B1-AS1 inhibiting breast cancer proliferation in breast cancer, and provided a new strategy for the treatment of breast cancer targeting lncRNA.
Project description:The MCF7 cell line represents a typical epithelial cell line and corresponds to luminal A breast cancer (estrogen-responsive). Overexpression of HAX1 was demonstrated in MCF7 cell line as well as in breast cancer samples, suggesting a role of HAX1 in breast cancer progression. HAX1 is a 32-kDa protein of unknown structure, involved in the regulation of apoptosis, cell migration and calcium homeostasis. It was also shown to bind mRNA. Scarcity of structural elements and the presence of a disordered region, inferred from HAX1 sequence, suggests that HAX1 is intrinsically disordered, and may have many protein-protein interactions. So far about 40 different proteins were characterized as HAX1 protein partners. In the present work, applying immunoaffinity chromatography coupled with mass spectrometry, we identified new candidates for HAX1 binding partners in breast cancer cells. Newly identified proteins may be divided into three, partially overlapping groups: cytoskeleton-associated proteins, GTP-ase associated proteins and RNA-binding proteins. These results imply that HAX1 has more protein partners than hitherto described. Subsequent analysis of these interactions may shed some light into molecular mechanisms of HAX1 functions.
Project description:Gene expression from MCF7 breast cancer cells at different times of TNFa incubation:pcs2 and 14-3-3 transduced cells Keywords: Expression Profiling by array We analyzed 2 arrays from each condition:MCF7-control tnf 0, MCF7-control tnf 20min, MCF-control tnf 90min, MCF7-14-3-3 tnf 0, MCF7-14-3-3 tnf 20min, MCF7-14-3-3 tnf 90min
Project description:We adapted the DiR barcode-based parallel reporter assay systems strategy to systematically identify the breast cancer related SNPs that affect gene expression by modulating activities of regulatory elements. Among 293 SNPs linked with GWAS-identified breast cancer-risk SNPs, we found seven functional regulatory SNPs in MCF7 cells. Further mechanism study indicates that one SNP regulates gene expression in breast cancer malignancy. The DiR system has great potential to advance the functional study of risk SNPs that have associations with polygenic diseases. Our findings hold great promise in benefiting breast cancer patients with prognostic prediction.
Project description:Gene expression from MCF7 breast cancer cells at different times of TNFa incubation:pcs2 and 14-3-3 transduced cells Keywords: Expression Profiling by array
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.