FOLH1 and posterior cortical atrophy: First, we tested for IGR-CaP1 cell expression of AR and one of its target genes, prostate specific membrane antigen (PSMA), in a representative PCa cell line panel composed of known AR(+) cell lines (LNCaP, and its derivative, C4-2B), compared to AR(–) (DU145 and PC3) cell lines.