Epigenetic and transcriptional analysis reveals a core transcriptional program conserved in clonal prostate cancer metastases [ChIP-seq]

We performed transcriptional profiling and chromatin immunoprecipitation for the key oncogenic driver in prostate cancer, Androgen Receptor (AR) and FOXA1, H3K27ac, H3K27me3 and CTCF to chart the epigenomic landscape in four clonal metastatic tumors from a single prostate cancer patient whose clinical course was closely followed over 17 years. The vast majority (~80% ) of all AR binding sites were shared among all samples and found in normal prostate tissue and primary prostate cancers signifying core binding events within the prostate lineage. Remarkably, active (H3K27ac marked) metastatic sample-specific AR binding sites showed no differential transcriptional output, indicating a robustness of transcriptional programming across different metastases samples. Overall design: Examination of AR, FOXA1, CTCF, H3K27ac, H3K27me3 and RNA-seq in 4 separate metastases samples from a single metastatic castration resistant prostate cancer patient.