GHRL and posterior cortical atrophy: Remarkably, In1-ghrelin treatment, but not native-ghrelin, increased PSA (a prostate-specific marker associated to PCa progression) protein secretion (Fig. 2b) and mRNA expression (Fig. 2c) in NP-cell cultures at 4 h and 24 h, being In1–19 the most effective peptide (Fig. 2b, c).