Project description:Investiage global methylation changes between patients at diagnosis and after relapse by CpG island methylation microarray analysis and determine the role of gene-specific methylation associated with relapse of cancer patients. Two-condition experiment, Biological replicates: 2 biological replicates and 2 samples from the same methylated CpG island amplification (MCA).
Project description:This SuperSeries is composed of the following subset Series: GSE35476: Array CGH analysis of human colorectal tumors GSE35508: Methylated CpG island amplification (MCA) microarray analysis of human colorectal tumors Refer to individual Series
Project description:Aberrant DNA methylation is implicated in the epigenetic field defect seen in gastric cancer (GC). Our aim in this study was to identify predictive biomarkers by screening for DNA methylation in noncancerous background gastric mucosa from GC patients. A total of 46 endoscopically obtained human gastric mucosa, 10 gastric cancer and 5 cell lines were analyzed using MCA microarray. Aberrant DNA methylation was compared with clinicopathological features. Healthy individuals were divided into two groups based on the types of chronic gastritis; A: antrum-predominant gastritis P or C: pangastritis or corpus-predominant gastritis
Project description:The goal of the experiment – genome-wide profiling of DNA methylation reveals a class of normally methylated CpG island promoters Keywords: DNA methylation, Methylated CpG island amplification coupled with promoter arrays, normal tissue
Project description:Methylation profiles of pancreatic adenocarcinoma cell lines were compared with normal pancreatic ductal tissues Methylated CpG island amplification was followed by CpG island microarray
Project description:Despite the effort in defining the molecular mechanisms for the drug resistance, predictors of response to chemotherapy have yet to be developed in gastric cancer. With microarray of whole human genes, we determined 29 genes associated with the response to cisplatin and docetaxel combination chemotherapy for metastatic gastric cancer. We obtained Fresh-frozen samples of tumor tissue and background gastric mucosa tissue from 19 patients with gastric cancer by endoscopic biopsy before DCS therapy. Total RNA was extracted from individual microdissected populations of cancer cells and background mucosa cells using RNAeasy mini kits and amplified with a random primer, WT-Ovation FFPE RNA Amplification System V2; NuGEN, Cincinnati, Ohio) according to the manufacturer’s protocols. The amplified fragmented RNA was hybridized on a Whole Human Genome Oligo Microarray Chip (Agilent Technologies) containing 44,000 cDNA clones.
Project description:We used NimbleGen human CpG/promoter microarrays for profiling epigenetic changes (DNA methylation, H3K27me3 and H3K4me3 marks) in colon tumors (Duke's stage II) and matching mucosa samples from patients. Analysis of DNA methylation was done by using the methylated CpG island recovery assay (MIRA) technique with further hybridization versus input on NimbleGen human CpG/promoter microarrays. For profiling of H3K27me3 and H3K4me3 marks, we performed chromatin immunoprecipitation with H3K27me3 (#07-449, Millipore) and H3K4me3 (#39159, Active Motif) antibodies and further hybridized versus input on NimbleGen human CpG/promoter microarrays. All experiments were performed simultaneously for matching tissue samples.
Project description:Methylated genomic fragments from tumor DNA and matching normal control were enriched with the methylated-CpG island recovery assay (MIRA); amplified, labeled and hybridized on Agilent CpG island tiling oligo arrays. MIRA enriched samples from tumor were labeled with Cy5 while MIRA enriched DNA samples from normal tissue were labeled with Cy3. Keywords: Cancer
Project description:Methylated genomic fragments from tumor and matching normal DNA were enriched with the methylated-CpG island recovery assay (MIRA); amplified, labeled and hybridized on Agilent CpG island tiling oligo arrays. Samples from tumor were labeled with Cy5 while the matching normal were labeled with Cy3 so that methylation differences can be detected. Keywords: Cancer
