Human Gene Set: HEIDENBLAD_AMPLICON_8Q24_DN


Standard name HEIDENBLAD_AMPLICON_8Q24_DN
Systematic name M11584
Brief description Down-regulated genes whose expression is associated with amplification of the 8q24 chromosome region in pancreatic cancer cell lines.
Full description or abstract DNA copy number alterations are believed to play a major role in the development and progression of human neoplasms. Although most of these genomic imbalances have been associated with dysregulation of individual genes, their large-scale transcriptional consequences remain unclear. Pancreatic carcinomas frequently display gene copy number variation of entire chromosomes as well as of chromosomal subregions. These changes range from homozygous deletions to high-level amplifications and are believed to constitute key genetic alterations in the cellular transformation of this tumor type. To investigate the transcriptional consequences of the most drastic genomic changes, that is, genomic amplifications, and to analyse the genome-wide transcriptional effects of DNA copy number changes, we performed expression profiling of 29 pancreatic carcinoma cell lines and compared the results with matching genomic profiling data. We show that a strong association between DNA copy numbers and mRNA expression levels is present in pancreatic cancer, and demonstrate that as much as 60% of the genes within highly amplified genomic regions display associated overexpression. Consequently, we identified 67 recurrently overexpressed genes located in seven precisely mapped commonly amplified regions. The presented findings indicate that more than one putative target gene may be of importance in most pancreatic cancer amplicons.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 15688027   Authors: Heidenblad M,Lindgren D,Veltman JA,Jonson T,Mahlamäki EH,Gorunova L,van Kessel AG,Schoenmakers EF,Höglund M
Exact source Fig 4A: green in the first 5 samples
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Source species Homo sapiens
Contributed by Arthur Liberzon (MSigDB Team)
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identifier namespace		 Human_Image_Clone_ID
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Version history 3.0: First introduced

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