Project description:At present, the DNA microarray application to study traditional Chinese medicines (TCMs) has received more and more attention. Furthermore, kinds of TCMs were too large, and ingredients in TCMs were also extremely abundant, which afforded an extraordinary source for drug development. To pursue a suitable approach on the research of TCM components, we produced gene expression profiles of 102 TCM ingredients treating MCF7 cells. All selected molecules were main ingredients in Chinese herb and TCM formula. In addition, the gene expression profiles data can be analyzed in combination with public database connectivity map (CMAP) and other bioinformatics methods, which could identify the underlying pharmacological mechanisms and molecular targets/pathway of numerous components. This study indicated that the gene expression profiles data of TCM components was a very convenient and useful approach for researchers engaged in study of TCMs.
Project description:Gene set enrichment analysis links several pathways are upregulated or downregulated in MCF7-6SA, compared to MCF7-CV. To elucidate the downstream signaling by which 6SA-Snail suppresses colonization, we first compared the expression profiles of MCF7-CV and MCF7-6SA with the use of microarray data. Through gene set enrichment analysis (GSEA), we found that several pathways were upregulated or downregulated in MCF7-6SA, compared to MCF7-CV. Of these, estrogen-dependent gene expression and estrogen receptor (ESR)-mediated signaling were among the most downregulated pathways in MCF7-6SA, which may contribute to the previously observed phenotypic changes in these ER+ cancer cell lines.
Project description:Human mesenchymal stem cell (MSC)-conditioned medium (CM) was previously reported to affect the biology of tumor cells; however, the precise mechanisms remain unclear. Here, we show that MSCs secreted 40- to 100-nm particles, which have the typical characteristics of exosomes, and these MSC-derived exosomes promoted migration of the breast cancer cell line MCF7. To further investigate the effect of MSC-exosomes on MCF7, we analyzed the gene expression profiles of MCF7 treated with or without MSC-exosomes for 24 h.
Project description:This experiment is designed to assess the role of RIP140 in estrogen receptor-dependent gene expression in MCF7 luminal breast cancer cells. MCF7 cells were transfected with an siRNA to target RIP140 or siControl, and subsequently depleted from hormones for three days. Thereafter, cells were treated for 6 hours with 10nM Estradiol and RNA was isolated and further processed for expression analyses.
Project description:The goal of this study is to identify ERalpha-target genes affected by overexpression of the histone arginine methyltransferase CARM1 in breast cancer cells. The roles of CARM1 in ERalpha+ breast cancer was not well characterized. Therefore, we created a Dox inducible CARM1 overexpressing MCF7 cell line where CARM1 is overexpressed by 2 fold to determine the created a Dox-inducible CARM1 overexpressing MCF7 cells for evaluation of the global effects of CARM1 on Eralpha-target gene expression. MCF7-tet-on-CARM1 clone 13 were treated under 4 conditions: DMSO; Dox; E2 (10nM); Dox+E2. In Dox+E2 condition, cells were pre-treated with Dox for 5 days before treating with E2 for 4 hours. 3 biological replicates were included and total of 12 samples were analyzed.