To address the role of TNF in metastasis following androgen deprivation, we initially employed three cell lines, representing CRPC (C4-2), prostate stromal myofibroblasts (WPMY-1) and tumor associated macrophages (THP-1), either alone, in co-culture or via conditioned media, to simulate the in vivo context of PCa. This evidence concerns the gene TNF and neoplasm.