RESUMEN
Chronic lymphocytic leukemia (CLL), a proliferative disease of mature looking B lymphocytes, is the commonest leukemia in western countries. It remains incurable by available treatment modalities. We report on the establishment of a permanent, EBV-negative, B-CLL line (WSU-CLL) from the peripheral blood of a patient with CLL. The cells grow as suspension in liquid culture, express IgG lambda and other B cell markers and show lg heavy and light gene rearrangements. Karyotypic analysis shows 45,X,del(3)(p14;p24),t(4;12;12) (q31;q22;p13), t(5;12) (q31;p13), add(16)(q24)X2, t(18;21) (q12;p12). WSU-CLL forms colonies when grown on soft agar. A xenograft model was established by injecting the WSU-CLL cells subcutaneously (s.c.) in severe combined immune deficient (SCID) mice. When the s.c. tumor was transplanted in vivo to other SCID mice, the success rate was 100% with a doubling time of 7.3 days. The CLL-SCID xenograft model was used to test the efficacy of selected standard chemotherapy drugs and new therapeutic agents against WSU-CLL. The cell line and the xenograft described can be used as a model to facilitate the development of new therapeutic agents against CLL in man.
Asunto(s)
Leucemia Linfocítica Crónica de Células B/patología , Anciano , Animales , Antineoplásicos/uso terapéutico , Aberraciones Cromosómicas , Modelos Animales de Enfermedad , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Inmunofenotipificación , Cariotipificación , Leucemia Linfocítica Crónica de Células B/tratamiento farmacológico , Leucemia Linfocítica Crónica de Células B/genética , Masculino , Ratones , Ratones SCID , Trasplante de Neoplasias , Trasplante Heterólogo , Células Tumorales Cultivadas/inmunología , Células Tumorales Cultivadas/patologíaRESUMEN
Spontaneous remission of renal cell carcinoma is a rare occurrence for which immunological factors have been implicated as a possible mechanism. We report a case of spontaneous remission of metastatic renal cell carcinoma in which we assayed various immune parameters. At remission we found no enhancement of natural killer cell, lymphokine-activated killer cell or lymphocyte proliferative response.