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Transforming growth factor(TGF)-beta 1 induces leukemic cell-growth-promoting activity in fibroblast cells
K Komatsu1, H Nakamura, H Akedo
1Department of Tumor Biochemistry, Center for Adult Diseases, Osaka, Japan.
Cell Biology International
|April 1, 1993
Abstract:
The production of the leukemic cell-growth-promoting factor (LGF) in TGF-beta 1-treated fibroblast cells was studied. BALB/c3T3 mouse fibroblast (3T3) cells cultured in Eagle's medium containing a low concentration of TGF-beta 1 (0.04-1 ng/ml) secreted 3-5 times more LGF than the cells cultured in the absence of TGF-beta 1. The amount of LGF secretion was dose-dependent on the concentration of post-cultured medium and time-dependent after the addition of TGF-beta 1. Similar findings were obtained in human diploid fibroblasts, WI-38 cells. LGF is a 18KD glycoprotein that is acid-stable but heat-unstable.