To do this, we conducted experiments in which CAR T cells were cocultured with either murine B-ALL cells (hCD19+ B-ALL) or murine pancreatic cancer cells engineered to express the ectodomain of human CD19 [hCD19+ Pancreatic Ductal Adenocarcinoma (PDAC)]. This evidence concerns the gene CD19 and pancreatic ductal adenocarcinoma.