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VHL Deficiency Drives Enhancer Activation of Oncogenes in Clear Cell Renal Cell Carcinoma

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机构: [1]Genome Inst Singapore, Canc Therapeut & Stratified Oncol, Singapore, Singapore; [2]Inst Mol & Cell Biol, Singapore, Singapore; [3]Natl Canc Ctr, Dept Med Sci, Lab Canc Epigenome, Singapore, Singapore; [4]Sun Yat Sen Univ, Canc Ctr, State Key Lab Oncol South China, Guangzhou, Guangdong, Peoples R China; [5]Duke NUS Med Sch, Canc & Stem Cell Biol Program, Singapore, Singapore; [6]Natl Univ Singapore, Grad Sch Integrat Sci & Engn, Singapore, Singapore; [7]Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Physiol, Singapore, Singapore; [8]Natl Univ Singapore, Canc Sci Inst Singapore, Singapore, Singapore; [9]Univ Oxford, Weatherall Inst Mol Med, MRC, Mol Haematol Unit, Oxford, England; [10]Duke NUS Med Sch, Cardiovasc & Metab Disorders Programme, Singapore, Singapore; [11]Natl Canc Ctr Singapore, Div Med Oncol, Singapore, Singapore; [12]Singapore Gen Hosp, Dept Urol, Singapore, Singapore; [13]KK Womens & Childrens Hosp, Dept Pathol & Lab Med, Singapore, Singapore; [14]Singapore Gen Hosp, Dept Pathol, Singapore, Singapore; [15]Genome Inst Singapore, Translat Res, Singapore, Singapore; [16]Univ Cologne, Inst Virol, Fuerst Pueckler Str, Cologne, Germany; [17]Natl Heart Ctr Singapore, SingHlth Duke NUS Inst Precis Med, Singapore, Singapore; [18]Duke NUS Med Sch, 8 Coll Rd, Singapore 169857, Singapore
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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.

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大类 | 1 区 医学
小类 | 1 区 肿瘤学
最新[2023]版:
大类 | 1 区 医学
小类 | 1 区 肿瘤学
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第一作者机构: [1]Genome Inst Singapore, Canc Therapeut & Stratified Oncol, Singapore, Singapore; [2]Inst Mol & Cell Biol, Singapore, Singapore;
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通讯机构: [1]Genome Inst Singapore, Canc Therapeut & Stratified Oncol, Singapore, Singapore; [2]Inst Mol & Cell Biol, Singapore, Singapore; [3]Natl Canc Ctr, Dept Med Sci, Lab Canc Epigenome, Singapore, Singapore; [5]Duke NUS Med Sch, Canc & Stem Cell Biol Program, Singapore, Singapore; [8]Natl Univ Singapore, Canc Sci Inst Singapore, Singapore, Singapore; [17]Natl Heart Ctr Singapore, SingHlth Duke NUS Inst Precis Med, Singapore, Singapore; [18]Duke NUS Med Sch, 8 Coll Rd, Singapore 169857, Singapore
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