The study, which published Aug. 25 in Cell, describes how a powerful subset of immune cells, known as “gamma delta T cells,” prevents other tumor-fighting T cells from entering pancreatic tumors. Without interference from gamma delta T-cells, CD4 and CD8 cells multiply and actively attack tumors the way they attack invading viruses or bacteria. Unfortunately, the immune system generates a large number of pro-tumor gamma delta T cells that infiltrate pancreatic tumors. Read more . . .