Growth Factors and Human Cancer Cells
Author Information
Author(s): C. McLeod, A. Thornley, R. Veale, E. Scott
Primary Institution: University of the Witwatersrand
Hypothesis
Can the secretion of transforming growth factors (TGFs) by human squamous cell carcinoma (SCC) cell lines explain their growth in soft agar?
Conclusion
The study suggests that SNO cells secrete low levels of a TGF-like factor, which may influence their growth in soft agar.
Supporting Evidence
- SNO cells express higher than normal numbers of EGF/TGFa receptors.
- EGF inhibits the proliferation of SNO cells in monolayer culture.
- SNO cells secrete low levels of a TGF-like factor that stimulates soft agar growth.
Takeaway
Some cancer cells can grow without being attached to a surface, and this study looks at how certain growth factors help them do that.
Methodology
The study involved culturing SNO cells and assessing their growth in soft agar with various growth factors and conditioned media.
Limitations
The study does not establish a clear autocrine pathway for TGF secretion in SNO cells.
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