 Before starting treatment some of the cancer cells will be taken from the patient and separated in the laboratory. A specially produced human virus adenovirus that carries the IL-2 gene will be put into the cells. The rest of the cancer cells will be stimulated to express on their surface a substance called the human CD40 ligand. These substances IL-2 and CD40L, already naturally present in the body, are meant to help the immune system fight the cancer. 