Decrease in BSF-2/IL-6 response in advanced cases of multiple myeloma
H Asaoku, M Kawano, K Iwato, O Tanabe, H Tanaka, T Hirano, T Kishimoto and A Kuramoto
Department of Internal Medicine, Hiroshima University, Japan.
Human myeloma cells freshly isolated from 40 patients with IgG multiple
myeloma (MM, 10 in stage I and 30 in stage III), were cultured for 48 hours
with recombinant B cell stimulatory factor 2 (rBSF-2)/interleukin- 6
(IL-6), which is considered a major growth factor for myeloma cells. Uptake
of 3H-thymidine by these purified myeloma cells was measured, and BSF-2
response was evaluated by stimulation index and delta cpm induced by
rBSF-2. Myeloma cells from cases in stage I responded to rBSF-2 better than
those in stage III. Moreover rBSF-2 responders also showed better response
to chemotherapy. Therefore, these results suggest that in vitro response of
myeloma cells to BSF-2 correlates with disease progression and clinical
response in patients of MM.
Volume 72,
Issue 2,
pp. 429-432,
08/01/1988
Copyright © 1988 by The American Society of Hematology