Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA692812 | ENA |
REPOSITORIES: ENA
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Project description:Next Generation Sequencing of Unmethylated Alu (NSUMA) interrogation of more than 130,000 individual Alus for differential methylation with concomitant analysis of copy number variations applied to the study of hypomethylation in colorectal cancer. normal colon tissues, matched primary tumors, blood and colon derived cell lines
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Project description:Colorectal cancer is a heterogeneous disease molecularly characterized by inherent genomic instabilities, chromosome instability and microsatellite instability. In the present study we propose transcriptome instability as an analogue to genomic instability on the transcriptome level. Exon microarray data from two independent series of altoghether 160 colorectal cancer tissue samples was used for global alternative splicing detection using the FIRMA algorithm (aroma.affymetrix). The sample-wise amounts of these alternative splicing scores exceeding a defined threshold (deviating exon usage amounts) were summarized to provide the basis for description of transcriptome instability. This characteristic was shown to be associated with splicing factor expression levels and patient survival in both independent sample series. We analyzed genome-wide expression at the exon-level for two independent series of colorectal cancer tissue biopsies using the Affymetrix Human Exon 1.0 ST platform. This series of samples represents the test series.
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