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Growth modulatory effects of granulocyte-macrophage colony-stimulating factor on human cell lines derived from
T J Herzog1, T K Horiuchi, S Williams
1Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO 63110, USA.
Objective:
In spite of increased expression of granulocyte-macrophage colony-stimulating factor surface receptors on solid tumors, the growth modulatory effects of granulocyte-macrophage colony-stimulating factor have not been well defined in gynecologic malignancies. We assessed the in vitro growth effects of granulocyte-macrophage colony-stimulating factor on such cell lines.
Study Design:
By use of a chromium 51 incorporation assay the in vitro growth effects of granulocyte-macrophage colony-stimulating factor on 12 cell lines derived from human malignancies were measured.
Results:
No growth stimulatory or inhibitory effect was mediated by granulocyte-macrophage colony-stimulating factor on six cell lines, whereas three lines showed consistent but not statistically significant dose-dependent growth stimulation. There was, however, a statistically significant increase in growth of short duration in three other cell lines at clinically relevant doses of granulocyte-macrophage colony-stimulating factor. Fluorometric cell cycle analysis demonstrated no change in cell-cycle distribution.
Conclusion:
Within this in vitro system, stimulation of gynecologic malignancies in patients receiving granulocyte-macrophage colony-stimulating factor for mitigation of the myelosuppressive effects of cytotoxic chemotherapy does not appear to be widespread nor sustained beyond 48 hours.