Login / Signup

Transcriptomes of prostate cancer with TMPRSS2:ERG and other ETS fusions.

Konrad H StopsackXiaofeng A SuJ Bailey VaselkivRebecca E GraffEricka M EbotAndreas PetterssonRosina T LisMichelangelo FiorentinoMassimo LodaKathryn L PenneyTamara L LotanLorelei A Mucci
Published in: Molecular cancer research : MCR (2022)
The most common somatic event in primary prostate cancer is a fusion between the androgen-related TMPRSS2 gene and the ERG oncogene. Tumors with these fusions, which occur early in carcinogenesis, have a distinctive etiology. A smaller subset of other tumors harbor fusions between TMPRSS2 and members of the ETS transcription factor family other than ERG. To assess the genomic similarity of tumors with non-ERG ETS fusions and those with fusions involving ERG, this study derived a transcriptomic signature of non-ERG ETS fusions and assessed this signature and ERG-related gene expression in 1,050 men with primary prostate cancer from three independent population-based and hospital-based studies. While non-ERG ETS fusions involving ETV1, ETV4, ETV5, or FLI1 were individually rare, they jointly accounted for one in seven prostate tumors. Genes differentially regulated between non-ERG ETS tumors and tumors without ETS fusions showed similar differential expression when ERG tumors and tumors without ETS fusions were compared (differences explained: R2 69-77%), including ETS-related androgen receptor (AR) target genes. Differences appeared to result from similarities among ETS tumors rather than similarities among non-ETS tumors. Gene sets associated with ERG fusions were consistent with gene sets associated with non-ERG ETS fusions, including fatty acid and amino acid metabolism, an observation that was robust across cohorts. Implications: Considering ETS fusions jointly may be useful for etiologic studies on prostate cancer, given that the transcriptome is profoundly impacted by ERG and non-ERG ETS fusions in a largely similar fashion, most notably genes regulating metabolic pathways.
Keyphrases
  • transcription factor
  • prostate cancer
  • genome wide identification
  • dna binding
  • gene expression
  • genome wide
  • radical prostatectomy
  • acute lymphoblastic leukemia
  • fatty acid
  • single cell
  • amino acid
  • rna seq
  • drug induced