Publication Date:
2010-10-12
Description:
Gastrointestinal stromal tumour (GIST) is the most common human sarcoma and is primarily defined by activating mutations in the KIT or PDGFRA receptor tyrosine kinases. KIT is highly expressed in interstitial cells of Cajal (ICCs)-the presumed cell of origin for GIST-as well as in haematopoietic stem cells, melanocytes, mast cells and germ cells. Yet, families harbouring germline activating KIT mutations and mice with knock-in Kit mutations almost exclusively develop ICC hyperplasia and GIST, suggesting that the cellular context is important for KIT to mediate oncogenesis. Here we show that the ETS family member ETV1 is highly expressed in the subtypes of ICCs sensitive to oncogenic KIT mediated transformation, and is required for their development. In addition, ETV1 is universally highly expressed in GISTs and is required for growth of imatinib-sensitive and resistant GIST cell lines. Transcriptome profiling and global analyses of ETV1-binding sites suggest that ETV1 is a master regulator of an ICC-GIST-specific transcription network mainly through enhancer binding. The ETV1 transcriptional program is further regulated by activated KIT, which prolongs ETV1 protein stability and cooperates with ETV1 to promote tumorigenesis. We propose that GIST arises from ICCs with high levels of endogenous ETV1 expression that, when coupled with an activating KIT mutation, drives an oncogenic ETS transcriptional program. This differs from other ETS-dependent tumours such as prostate cancer, melanoma and Ewing sarcoma where genomic translocation or amplification drives aberrant ETS expression. It also represents a novel mechanism of oncogenic transcription factor activation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2955195/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2955195/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chi, Ping -- Chen, Yu -- Zhang, Lei -- Guo, Xingyi -- Wongvipat, John -- Shamu, Tambudzai -- Fletcher, Jonathan A -- Dewell, Scott -- Maki, Robert G -- Zheng, Deyou -- Antonescu, Cristina R -- Allis, C David -- Sawyers, Charles L -- 5F32CA130372/CA/NCI NIH HHS/ -- CA148260/CA/NCI NIH HHS/ -- CA47179/CA/NCI NIH HHS/ -- F32 CA130372/CA/NCI NIH HHS/ -- F32 CA130372-02/CA/NCI NIH HHS/ -- GM40922/GM/NIGMS NIH HHS/ -- K08 CA140946/CA/NCI NIH HHS/ -- K08 CA140946-02/CA/NCI NIH HHS/ -- K08CA140946/CA/NCI NIH HHS/ -- P01 CA047179/CA/NCI NIH HHS/ -- P01 CA047179-169002/CA/NCI NIH HHS/ -- P01CA47179/CA/NCI NIH HHS/ -- R21 MH087840/MH/NIMH NIH HHS/ -- R21 MH087840-01/MH/NIMH NIH HHS/ -- R21MH087840/MH/NIMH NIH HHS/ -- RC2 CA148260-02/CA/NCI NIH HHS/ -- England -- Nature. 2010 Oct 14;467(7317):849-53. doi: 10.1038/nature09409. Epub 2010 Oct 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20927104" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Benzamides
;
Binding Sites
;
Biomarkers, Tumor/genetics/metabolism
;
Cell Line, Tumor
;
*Cell Lineage
;
Cell Survival/drug effects
;
*Cell Transformation, Neoplastic
;
DNA-Binding Proteins/antagonists & inhibitors/genetics/*metabolism
;
Disease Progression
;
Enhancer Elements, Genetic/genetics
;
Gastrointestinal Stromal Tumors/*metabolism/*pathology
;
Gene Expression Profiling
;
Gene Expression Regulation, Neoplastic/genetics
;
Humans
;
Imatinib Mesylate
;
Interstitial Cells of Cajal/metabolism/pathology
;
Mice
;
Mutant Proteins/genetics/metabolism
;
Mutation
;
NIH 3T3 Cells
;
Oncogenes/genetics/*physiology
;
Piperazines/pharmacology
;
Protein Stability
;
Proto-Oncogene Proteins c-kit/genetics/*metabolism
;
Pyrimidines/pharmacology
;
Signal Transduction
;
Transcription Factors/antagonists & inhibitors/genetics/*metabolism
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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