Antigen Presentation/immunology; Immunologic Factors/pharmacology; Leukemia, Lymphocytic, Chronic, B-Cell/immunology; T-Lymphocytes/immunology; Actins/metabolism; Animals; Antigen Presentation/drug effects; Antineoplastic Agents/pharmacology; B-Lymphocytes/drug effects; B-Lymphocytes/immunology; CD4-Positive T-Lymphocytes/drug effects; CD4-Positive T-Lymphocytes/immunology; CD4-Positive T-Lymphocytes/metabolism; CD8-Positive T-Lymphocytes/drug effects; CD8-Positive T-Lymphocytes/immunology; CD8-Positive T-Lymphocytes/metabolism; Humans; Interleukin-2/metabolism; Lenalidomide; Leukemia, Lymphocytic, Chronic, B-Cell/blood; Lymphocyte Activation/immunology; Lymphocyte Culture Test, Mixed; Lymphocyte Function-Associated Antigen-1/metabolism; Lymphocyte Specific Protein Tyrosine Kinase p56(lck)/metabolism; Mice; Mice, Inbred Strains; Mice, Transgenic; Microfilament Proteins/metabolism; Protein-Tyrosine Kinases/metabolism; Proto-Oncogene Proteins/genetics; Receptors, Antigen, T-Cell/metabolism; Superantigens/immunology; T-Lymphocytes/drug effects; T-Lymphocytes/metabolism; T-Lymphocytes, Cytotoxic/immunology; Thalidomide/analogs & derivatives; Thalidomide/pharmacology