Lymphocytic B-Leukemia (B-CLL) w/Human IL-2 Gene Modified & Human CD40 Ligand-Expressing Autologous Tumor Cells

In the laboratory, we will put a special gene into cancer cells that have been taken from the subject. This gene will make the cells produce interleukin 2 (IL-2), which may help the patient's immune system kill cancer cells. Also, we will use CD40 ligand (CD40L) with the IL-2. Studies of cancers in animals and in cancer cells that are grown in laboratories have suggested adding the CD40L helps the IL-2 work better. Some of these new cells will then be given back to the subject as a vaccine shot. We believe that a part of the subject's immune system (cells called T-reg cells) might try to kill off these special cells. If the T-reg cells do that, the vaccine would not work as well or last as long. To try to avoid this, before the special cells are put back into the subject's body, we will give them an intravenous (IV) dose of IL-2 immunotoxin (called denileuk diftitox or ONTAK). ONTAK should get rid of some of the T-reg cells in the subject's body which should help the special cells work better and longer. The purpose of this study is to learn the safety and cancer-fighting effects of using IL-2 with the vaccine.