GHRL and posterior cortical atrophy: Evaluation of mRNA expression of ghrelin-system in androgen-dependent and castration-resistant PCa cell-lines compared with the normal-like prostate cell-line RWPE1 revealed that while native-ghrelin was expressed in normal RWPE1-cells and in LNCaP/VCaP PCa-cells (Fig. 1h), its expression was almost undetectable in the other PCa cell-lines analyzed (Fig. 1h).