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Expression profiling of isogenic A549 cell lines with and without ELF3 knock-down

ABSTRACT: Expression profiling of isogenic A549 cell lines with and without ELF3 knock-down

PROVIDER: PRJNA565714 | ENA |

REPOSITORIES: ENA

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Expression profiling of isogenic A549 cell lines with and without ELF3 knock-down

Project description:Gene function in cancer is often cell type-specific. The epithelial cell-specific transcription factor ELF3 is a documented tumour suppressor in many epithelial tumours yet displays oncogenic properties in others. Here, we show that ELF3 is an oncogene in the adenocarcinoma subtype of lung cancer (LUAD), providing genetic, functional, and clinical evidence of subtype specificity. We discover a region of focal amplification at chromosome 1q32.1 encompassing the ELF3 locus in LUAD which is absent in the squamous subtype. Gene dosage and promoter hypomethylation affect the locus in up to 80% of LUAD analysed. ELF3 expression was required for tumour growth and a pan-cancer expression network analysis supports its subtype and tissue specificity. We further show that ELF3 displays strong prognostic value in LUAD but not LUSC. We conclude that, contrary to many other tumours of epithelial origin, ELF3 is an oncogene and putative therapeutic target in LUAD.

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Project description:Aldehyde dehydrogenase isozymes ALDH1A1 and ALDH3A1 are highly expressed in non small cell cell lung cancer. Neither the mechanism nor the biological significance for such over expression have been studied. We used microarrays to analyze changes in A549 lung cancer cell line in which ALDH activity was reduced using lentiviral mediated expression of siRNA against both isozymes (Lenti 1+3) Keywords: Gene Profiling after ALDH Knock Down

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