Treatment of B-CLL With Autologous IL2 and CD40 Ligand-Expressing Tumor Cells + Lenalidomide

This is a research study to determine the safety and effectiveness of using special cells that may make the subject's immune system fight their chronic lymphocytic leukemia (CLL) in combination with a drug called Lenalidomide. To do this, the investigators will put a special gene into cancer cells that have been taken from the subject. This will be done in the laboratory. This gene will make the cells produce interleukin 2 (IL-2), which is a natural substance that may help the subject's immune system kill cancer cells. Additionally, the investigators will stimulate the cancer cells with normal embryonic fibroblasts (cells that develop into normal connective tissues in the body) so that they will make another natural protein called CD40 ligand (CD40L). Some of these cells will then be put back into the subject's body with the goal that they will act like a vaccine and stimulate the immune system to attack the CLL cells. The investigators have already conducted a study similar to this in other subjects with CLL. In those subjects the investigators saw some changes in the subject's immune system that might indicate that the modified cells were helping their immune system fight the cancer. However, in most of the subjects this change in the immune system went away after the injections were stopped. The investigators think that this may be due to a high level of cells called T regulatory cells. T regulatory cells are part of the immune system and prevent excessive reactions from other cells in the body. Studies have shown that reducing T regulatory cells allows the body to fight the cancer for a longer period of time. Recent studies have shown that using Lenalidomide helps the body reduce T regulatory cells. Using Lenalidomide along with the injections (shots) might help the body fight the cancer for a longer period of time. Lenalidomide is also called Revlimid. In this study the investigators want to see if they can make the change in the immune system last longer b