Abnormal response to IL-5 in B-cell chronic lymphocytic leukemia.
In B-cell chronic lymphocytic leukemia, neoplastic B-lymphocytes are arrested in development. Since interleukins are essential for B-cell differentiation, we examined whether B-CLL cells were capable of responding normally to interleukins. Purified B-lymphocytes from B-CLL patients and controls were compared for their ability to proliferate and differentiate after stimulation with MCAT or SAC plus rhIL-2 or rhIL-5. When rhIL-5 was added to MCAT-stimulated cells, 8 of 10 controls showed a substantial increase in IgM production, compared with only 1 of 10 B-CLL patients. Lack of IL-5 responsiveness could provide insight into the arrested B-lymphocyte development of some B-CLL patients.
Hayes
T G
TG
Department of Medicine, Baylor College of Medicine, Houston, Texas.
Tan
X L
XL
Moseley
A B
AB
Huston
M M
MM
Huston
D P
DP
D002455:Cell Division / Q000187:drug effects; D006801:Humans; D007075:Immunoglobulin M / Q000096:biosynthesis; D007376:Interleukin-2 / Q000494:pharmacology; D015848:Interleukin-5 / Q000494:pharmacology*; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000276:immunology / Q000473:pathology*; D008934:Mitogens / Q000494:pharmacology; D011994:Recombinant Proteins / Q000494:pharmacology; D014407:Tumor Cells, Cultured
D007075:Immunoglobulin M; D007376:Interleukin-2; D015848:Interleukin-5; D008934:Mitogens; D011994:Recombinant Proteins