NKX3-1 and posterior cortical atrophy: Reverse-transcription (RT) PCR amplified AR, PCa-specific homeobox gene NKX3-1 and EPCAM transcripts for each PCSC population, each within similar ranges, with the exception of EPCAM, the expression of which was elevated in PXIII PCSCs, which possessed the lowest Gleason score of 3 + 3 (Figure 2F and Figure S3).