NE phenotype prostate tumor cells in TRAMP mice display similar morphological and molecular characteristics to human NED and NEPC cells, including the expression of IHC markers, synaptophysin, chromogranin A and FOXA2, and loss of expression of cytokeratin 8 (CK8) [2], [4], [7], [8], [26]. This evidence concerns the gene KRT8 and prostate neoplasm.