EurekAlert reports on a novel way of combining gene therapy with stem cells to cure cancer. Tissue repair stem cells (mesenchymal progenitor cells or MSC) migrate to tumors in the body in order to build tissue, but researchers altered them to attack cancerous cells instead. In effect, stem cells become the delivery mechanism for the gene therapy. From the article: "Andreeff will present animal data suggesting that gene modified MSC can inhibit the growth of leukemias, lung metastases of melanomas and breast cancer, ovarian and brain tumors. For example, MSC gene therapy cured 70 percent of mice implanted with one kind of human ovarian cancer."