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Systems-wide RNAi analysis of different chr13 genes in colorectal cancer cell line (SW480)

ABSTRACT: Expression profiles were generated for eight genes located on chromosome 13 following RNAi to enable the determination of gene specific LOF RNAi signatures in the colorectal cancer cell line SW480. Triplicate transfections of SW480 cells were performed using two different siRNA duplexes corresponding to each gene target in 6-well plates using the same protocol scaled 30-fold. RNA was purified 72 hrs after transfection. RNA was also purified from negative control siRNA-transfected cells (AllStar siNegative (siNEG), Qiagen). Reduction in target mRNA levels was confirmed by real-time PCR prior to the array analysis.

ORGANISM(S): Homo sapiens

SUBMITTER: Tim Beissbarth 

PROVIDER: E-GEOD-33824 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Chromosomal copy number alterations (aneuploidy) define the genomic landscape of most cancer cells, but identification of the oncogenic drivers behind these imbalances remains an unfinished task. In this study, we conducted a systematic analysis of colorectal carcinomas that integrated genomic copy number changes and gene expression profiles. This analysis revealed 44 highly overexpressed genes mapping to localized amplicons on chromosome 13, gains of which occur often in colorectal cancers (CRC  ...[more]

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