Control mice (left panel) with prostate cancer show large areas of metastasis in the lungs (blue). When a subset of animals were treated with unmodified T cells (middle panel), the secondary tumors were smaller than in untreated mice. And when a separate group of mice received T cells engineered to produce MDA-7/IL-24 (right panel), metastases shrunk even more, in some cases down to nothing. Credit: Shawn Wang, PhD Read Time: Through T cell engineering, researchers at Virginia Commonwealth University Massey Cancer Center show that it's possible to arrest tumor growth for a variety of cancers and squash the spread of cancer to other tissues. This research will be published in tomorrow's print edition of Cancer Research.