Journal
CELL REPORTS
Volume 20, Issue 6, Pages 1476-1489Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2017.07.043
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Funding
- Swedish Cancer Society [CAN 2015/494]
- CREATE Health
- BioCARE
- Torsten Gester Foundation
- Gunnar Nilsson's Cancer Foundation
- Regional ALF funds [40610]
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Comprehensive transcriptome studies of cancers often rely on corresponding normal tissue samples to serve as a transcriptional reference. In this study, we performed in-depth analyses of normal kidney tissue transcriptomes from the TCGA and demonstrate that the histological variability in cellularity, inherent in the kidney architecture, lead to considerable transcriptional differences between samples. This should be considered when comparing expression profiles of normal and cancerous kidney tissues. We exploited these differences to define renal-cell-specific gene signatures and used these as a framework to analyze renal cell carcinoma (RCC) ontogeny. Chromophobe RCCs express FOXI1-driven genes that define collecting duct intercalated cells, whereas HNF-regulated genes, specific for proximal tubule cells, are an integral part of clear cell and papillary RCC transcriptomes. These networks may be used as a framework for understanding the interplay between genomic changes in RCC subtypes and the lineage-defining regulatory machinery of their non-neoplastic counterparts.
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