Project description:We select 3 pairs of tissue samples, including 3 breast tissues and 3 adjacent tissues, and then perform miRNA chip detection to find differential miRNAs. We used microarrays to identify differential expressed miRNAs in breast cancer and paired normal breast tissue
Project description:Circulating transcriptional landscapes between breast cancer tissues and adjacent normal tissues were compared using the Affymetrix Human OE LncRNA Microarray with probes for profiling of 63542 human lncRNAs. Goal was to investigate potential lncRNAs involved in breast cancer progression.
Project description:Genome wide DNA methylation profiling of tumor adjacent normal tissue from patients with invasive breast cancer, as well as tissue from women undergoing reduction mammoplasty or prophylactic surgery. The Illumina Infinium 450k Human DNA methylation Beadchip was used to obtain DNA methylation profiles across approximately 485,577 CpGs in snap frozen breast tissue. Samples included 70 tumor-adjacent normal breast tissue with invasive disease, 8 tissues from breast prophylactic patients, and 18 tissues from breast reduction patients.
Project description:The early-onset breast cancer patients (age ≤40) often display higher incidence of axillary lymph node metastasis, and poorer five-year survival than the late-onset patients. To identify the genes and molecules associated with poor prognosis of early-onset breast cancer, we examined gene expression profiles from paired breast normal/ tumor tissues, and coupled with Gene Ontology and public data base analysis. Our data showed that the expression of GAS7b gene was lower in the early-onset breast cancer patients as compared to the elder patients. We found that GAS7 was associated with CYFIP1 and WAVE2 complex to suppress breast cancer metastasis via blocking CYFIP1 and Rac1 protein interaction, actin polymerization, and β1-integrin/FAK/Src signaling. We further demonstrated that p53 directly regulated GAS7 gene expression, which was inversely correlated with p53 mutations in breast cancer specimens. Our study uncover a novel regulatory mechanism of p53 in early-onset breast cancer progression through GAS7-CYFIP1 mediated signaling pathways.
Project description:To discriminate miRNA expression differences between adjacent normal and tumor tissues of breast cancer. 101 breast tumor + 15 adjacent breast normal tissue samples.
Project description:Genome wide DNA methylation profiling of tumor adjacent normal tissue from patients with invasive breast cancer, as well as tissue from women undergoing reduction mammoplasty or prophylactic surgery. The Illumina Infinium 450k Human DNA methylation Beadchip was used to obtain DNA methylation profiles across approximately 485,577 CpGs in snap frozen breast tissue. Samples included 70 tumor-adjacent normal breast tissue with invasive disease, 8 tissues from breast prophylactic patients, and 18 tissues from breast reduction patients. Bisulphite converted DNA from the 96 samples were hybridized to the Illumina Infinium 450k Human Methylation Beadchip.
Project description:In an attempt to search for metastasis-associated circRNAs, we performed RNA-sequencing on ribosomal RNA-depleted total RNA from three pairs of triple-negative breast cancer (TNBC) and adjacent normal tissues. A computational pipeline based on the anchor alignment of unmapped reads was used to identify circular RNAs. Taken together, 69,815 distinct circRNAs were found in this study and 87% were derived from exons, and the others were derived from introns, intergenic region and 3′ or 5′ UTR, etc. We further identified 5,033 differentially expressed circRNAs (fold change ≥ 2 and p < 0.05). Among them, 3,726 circRNAs were significantly down-regulated and 1,307 circRNAs were significantly up-regulated in TNBC tissues compared with adjacent normal tissues. These data indicate that circRNAs are abundant in human breast tissues and dysregulation of circRNAs may contribute to breast cancer progression.