Whole-Genome and Transcriptional Analysis of Treatment-Emergent Small-Cell Neuroendocrine Prostate Cancer Demonstrates Intraclass Heterogeneity.

Published

Journal Article

Therapeutic resistance in metastatic castration-resistant prostate cancer (mCRPC) can be accompanied by treatment-emergent small-cell neuroendocrine carcinoma (t-SCNC), a morphologically distinct subtype. We performed integrative whole-genome and -transcriptome analysis of mCRPC tumor biopsies including paired biopsies after progression, and multiple samples from the same individual. t-SCNC was significantly less likely to have amplification of AR or an intergenic AR-enhancer locus, and demonstrated lower expression of AR and its downstream transcriptional targets. Genomic and transcriptional hallmarks of t-SCNC included biallelic loss of RB1, elevated expression levels of CDKN2A and E2F1, and loss of expression of the AR and AR-responsive genes including TMPRSS2 and NKX3-1. We identified three tumors that converted from adenocarcinoma to t-SCNC and demonstrate spatial and temporal intrapatient heterogeneity of metastatic tumors harboring adenocarcinoma, t-SCNC, or mixed expression phenotypes, with implications for treatment strategies in which dual targeting of adenocarcinoma and t-SCNC phenotypes may be necessary. IMPLICATIONS: The t-SCNC phenotype is characterized by lack of AR enhancer gain and loss of RB1 function, and demonstrates both interindividual and intraindividual heterogeneity.Visual Overview: http://mcr.aacrjournals.org/content/molcanres/17/6/1235/F1.large.jpg.

Full Text

Duke Authors

Cited Authors

  • Aggarwal, RR; Quigley, DA; Huang, J; Zhang, L; Beer, TM; Rettig, MB; Reiter, RE; Gleave, ME; Thomas, GV; Foye, A; Playdle, D; Lloyd, P; Chi, KN; Evans, CP; Lara, PN; Feng, FY; Alumkal, JJ; Small, EJ

Published Date

  • June 2019

Published In

Volume / Issue

  • 17 / 6

Start / End Page

  • 1235 - 1240

PubMed ID

  • 30918106

Pubmed Central ID

  • 30918106

Electronic International Standard Serial Number (EISSN)

  • 1557-3125

Digital Object Identifier (DOI)

  • 10.1158/1541-7786.MCR-18-1101

Language

  • eng

Conference Location

  • United States