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Series GSE35988 Query DataSets for GSE35988
Status Public on May 23, 2012
Title The Mutational Landscape of Lethal Castrate Resistant Prostate Cancer
Organism Homo sapiens
Experiment type Expression profiling by array
Genome binding/occupancy profiling by genome tiling array
Summary Characterization of the prostate cancer transcriptome and genome has identified chromosomal rearrangements and copy number gains/losses, including ETS gene fusions, PTEN loss and androgen receptor (AR) amplification, that drive prostate cancer development and progression to lethal, metastatic castrate resistant prostate cancer (CRPC)1. As less is known about the role of mutations2-4, here we sequenced the exomes of 50 lethal, heavily-pretreated metastatic CRPCs obtained at rapid autopsy (including three different foci from the same patient) and 11 treatment naïve, high-grade localized prostate cancers. We identified low overall mutation rates even in heavily treated CRPC (2.00/Mb) and confirmed the monoclonal origin of lethal CRPC. Integrating exome copy number analysis identified disruptions of CHD1, which define a subtype of ETS‑ prostate cancer. Similarly, we demonstrate that ETS2, which is deleted in ~1/3 of CRPCs (commonly through TMPRSS2:ERG fusions), is a prostate cancer tumor suppressor that can also be deregulated through mutation. Further, we identified recurrent mutations in multiple chromatin/histone modifying genes, including MLL2 (mutated in 8.6% of prostate cancers), and demonstrate interaction of the MLL complex with AR, which is required for AR mediated signaling. We also identified novel recurrent mutations in the AR collaborating factor FOXA1, which is mutated in 5 of 147 (3.4%) prostate cancers (both untreated localized prostate cancer and CRPC) , and showed that mutated FOXA1 represses androgen signaling and increases tumor growth in vitro and in vivo. Proteins that physically interact with AR, such as the ERG gene fusion product, FOXA1, MLL2, UTX, and ASXL1 were found to be mutated in CRPC, suggesting novel drivers of prostate cancer progression and potential resistance mechanisms to anti-androgen therapies. In summary, we describe the mutational landscape of a heavily treated metastatic cancer, identify novel mechanisms of AR signaling deregulated in prostate cancer, and prioritize candidates for future study.
Overall design Gene expression profiling and array CGH (aCGH) was performed on matched benign prostate tissues (n=28), localized prostate cancer (n=59), and metastatic castrate resistant prostate cancer (CRPC, n=35). For gene expression profiling, frozen prostate tissue samples (channel 2), were hybridized against a commercial pool of benign prostate tissue (Clontech, channel 1). For aCGH, frozen prostate tissue samples (channel 2) were hybridized against a commerical sample of Human Male Genomic DNA (Promega, channel 1).
Contributor(s) Tomlins SA, Chinnaiyan AM
Citation(s) 22722839
Submission date Feb 21, 2012
Last update date Jan 23, 2019
Contact name Scott Tomlins
Phone 734-615-1417
Organization name University of Michigan
Department Pathology
Lab Chinnaiyan Lab
Street address 1400 E. Medical Center Dr., 5410 CCGC
City Ann Arbor
State/province MI
ZIP/Postal code 48109
Country USA
Platforms (4)
GPL6480 Agilent-014850 Whole Human Genome Microarray 4x44K G4112F (Probe Name version)
GPL6848 Agilent-012391 Whole Human Genome Oligo Microarray G4112A (Probe Name version)
GPL9075 Agilent-014698 Human Genome CGH Microarray 105A (G4412A) [Probe Name version]
Samples (244)
GSM878750 N1
GSM878751 N2
GSM878752 N4
BioProject PRJNA151651

Download family Format
SOFT formatted family file(s) SOFTHelp
MINiML formatted family file(s) MINiMLHelp
Series Matrix File(s) TXTHelp

Supplementary file Size Download File type/resource
GSE35988_RAW.tar 5.2 Gb (http)(custom) TAR (of TXT)
Processed data included within Sample table

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