Protein-coding mutations in clear cell renal cell carcinoma (ccRCC) have been extensively characterized, frequently involving inactivation of the von Hippel-Lindau (VHL) tumor suppressor. Roles for noncoding cis-regulatory aberrations in ccRCC tumorigenesis, however, remain unclear. Analyzing 10 primary tumor/normal pairs and 9 cell lines across 79 chromatin profiles, we observed pervasive enhancer malfunction in ccRCC, with cognate enhancer-target genes associated with tissue-specific aspects of malignancy. Superenhancer profiling identified ZNF395 as a ccRCC-specific and VHL-regulated master regulator whose depletion causes near-complete tumor elimination in vitro and in vivo. VHL loss predominantly drives enhancer/superenhancer deregulation more so than promoters, with acquisition of active enhancer marks (H3K27ac, H3K4me1) near ccRCC hallmark genes. Mechanistically, VHL loss stabilizes HIF2 alpha-HIF1 beta heterodimer binding at enhancers, subsequently recruiting histone acetyltransferase p300 without overtly affecting preexisting promoter-enhancer interactions. Subtype-specific driver mutations such as VHL may thus propagate unique pathogenic dependencies in ccRCC by modulating epigenomic landscapes and cancer gene expression. SIGNIFICANCE: Comprehensive epigenomic profiling of ccRCC establishes a compendium of somatically altered cis-regulatory elements, uncovering new potential targets including ZNF395, a ccRCC master regulator. Loss of VHL, a ccRCC signature event, causes pervasive enhancer malfunction, with binding of enhancer-centric HIF2 alpha and recruitment of histone acetyltransferase p300 at preexisting lineage-specific promoter-enhancer complexes. (C) 2017 AACR.
基金:
Biomedical Research Council Young Investigator Grant [1510851024]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [61661146004]; National Research Foundation [NRF2016NRF-NSFC001-057]; National Medical Research CouncilMedical Research Council UK (MRC) [NMRC/STaR/0026/2015, NMRC/STAR/0024/2014, NMRC/CIRG/1402/2014, NMRC/CBRG/069/2014]; Genome Institute of Singapore; Institute of Molecular and Cell Biology under the Agency for Science, Technology and Research; Institute of Molecular and Cell Biology under Duke-NUS Medical School; Cancer Science Institute of Singapore, NUS - National Research Foundation Singapore; Singapore Ministry of Education under its Research Centres of Excellence initiative; Biomedical Research Council Strategic Positioning Fund [2012/001]; Wellcome Trust Strategic AwardWellcome Trust [106130/Z/14/Z]; Medical Research Council (MRC)Medical Research Council UK (MRC); Wellcome Trust Clinical Research Training FellowshipWellcome Trust [098931/Z/12/Z]
Yao Xiaosai,Tan Jing,Lim Kevin Junliang,et al.VHL Deficiency Drives Enhancer Activation of Oncogenes in Clear Cell Renal Cell Carcinoma[J].CANCER DISCOVERY.2017,7(11):1284-1305.doi:10.1158/2159-8290.CD-17-0375.
APA:
Yao, Xiaosai,Tan, Jing,Lim, Kevin Junliang,Koh, Joanna,Ooi, Wen Fong...&Tan, Patrick.(2017).VHL Deficiency Drives Enhancer Activation of Oncogenes in Clear Cell Renal Cell Carcinoma.CANCER DISCOVERY,7,(11)
MLA:
Yao, Xiaosai,et al."VHL Deficiency Drives Enhancer Activation of Oncogenes in Clear Cell Renal Cell Carcinoma".CANCER DISCOVERY 7..11(2017):1284-1305