Project description:Transcriptional profiling of cancer stem cells (ALDH-high cells) comparing non-cancer stem cells (ALDH-low cells), sorted out using ALDEFLUOR assay. Goal was to identity cancer stem cell-specific genes. Two-condition experiment, sphere-cultured cells vs. adherent-cultured cells: 1 ALDH-high replicate and 1 ALDH-low replicate.
Project description:Colorectal cancer (CRC) is one of the most prevalent tumors, with a high mortality rate. Nearly half of CRC patients develop metastasis, which accounts for as many as 90% of CRC-related deaths. In the metastasis process, cancer cells exhibit altered dependency on specific metabolic pathways and some of the metabolites discovered might be useful as potential diagnostic biomarkers. To identify metabolic pathway dependencies in CRC metastasis, mass spectrometry-based untargeted metabolomic analysis was performed in two pairs of CRC cell lines with different metastatic abilities. Each pair of cell lines was comprised of primary and metastatic colorectal cancer cell lines (SW480 vs. SW620; HT-29 vs. COLO 205). Relative levels of intracellular metabolites distinguished high-metastatic CRC cells from low-metastatic CRC cells.
Project description:We developed an experimentally derived molecular signature from mouse tumor models that is closely associated with survival of colorectal cancer (CRC) patients. We isolated single cell-derived progenies (SCPs) from the SW480 CRC cell line and compared their metastatic potential in an orthotopic implantation model of murine CRC. We compared the differences in the gene expression profiles of a high metastatic variant SCP51, a low metastatic variant SCP58 and their parent SW480/EGFP.
Project description:DEAD-box RNA helicase 21 (DDX21), is a nucleolar protein harboring ATP-dependent double-stranded RNA unwinding activities, essential in rRNA processing and ribosome biogenesis. However, its role in colorectal cancer (CRC) progression remains unclear. In this study, we performed RNAseq in colorectal cancer line HCT8 with or without DDX21 gene silencing, to reveal the role of DDX21 in transcriptional and epigenetic control of CRC cell proliferation.
Project description:We performed comprehensive genome-scale DNA methylation profiling by Illumina Infinium HumanMethylation27 of 18 DNA pools that represent 84 colorectal cancer (CRC) samples divided according to their high-, intermediate-, and low-methylation epigenotypes (HME, IME, and LME, respectively) and 3 pools representing 70 normal-adjacent colonic tissues. Bisulphite converted DNA from the 21 DNA pools were hybridised to the Illumina Infinium 27k Human Methylation Beadchip v1.2
Project description:To identify genes that are differentially expressed between ALDH-high and ALDH-low cells in endometrial cancer-derived spheroids, we performed whole genome microarray expression profiling as a discovery platform. Human endometrial cancer stem spheroid cells from three patients were sorted into ALDH-high and ALDH-low cells using the FACS Aria II Cell Sorter. Total RNA extracted from the cells were labeled with Cy3 and used for microarray analyses with Agilent Whole Human Genome Oligo Microarrays.
Project description:Transcriptional profiling of cancer stem cells (ALDH-high cells) comparing non-cancer stem cells (ALDH-low cells), sorted out using ALDEFLUOR assay. Goal was to identity cancer stem cell-specific genes.
Project description:Approximately two decades ago, Vogelstein and Fearon proposed the adenoma-carcinoma sequence of sporadic CRC development and illustrated the accumulation of genetic alterations during the stepwise progression, thereby providing a guideline for clinical practice. Although the detection and excision of precancerous lesions could prevent colorectal cancer and reduce mortality, 6% of adenomas will ultimately develop into colorectal cancer. Thus, this genetic model for colorectal tumorigenesis may not completely reflect the complex essence of the disease and whether the mode of initiation of the events in the multistep progression affects the outcome of CRC is still unknown. In this study, mRNA and miRNA expression profiling was performed with human colorectal tissues, including normal mucosa, adenoma and adenocarcinoma. Then, an integrated approach was adopted to establish the regulatory interaction networks that were correlated with colorectal carcinogenesis. Finally, a 55-gene signature whose expression was down-regulated in precancerous lesions compared to normal tissue was identified as a potential early indicator of CRC survival. The results suggested that genes related to immunity and homeostasis played a critical role in protection against adenoma initiation and that the altered molecular events that influence colorectal cancer prognosis may be set in an early, precancerous stage. Four types of human colorectal tissues were selected by colonoscopic resection or colorectal surgery, including 12 normal mucosae, 21 low-grade adenomas (mild or moderate atypical hyperplasia), 30 high-grade adenomas (severe atypical hyperplasia or carcinoma in situ) and 25 adenocarcinomas. Gene expression profiling analysis of these samples was performed using Agilent 4x44K human whole genome gene expression microarray (G4112F).
Project description:We evaluated the modulation of mRNA upon spiperone treatment in colorectal cancer epithelial cell line (HCT116) and colorectal cancer stem cells (CRC-SC#1)
