PMID: 9422080Jan 9, 1998Paper

Growth-regulative activity of human alpha-fetoprotein for different types of tumor and normal cells

Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine
Elena DudichG Sukhikh

Abstract

The dose-dependent alpha-fetoprotein (AFP) reactivity of different types of tumor cells and normal embryonal fibroblasts, which are capable of taking up AFP, was investigated. High doses (more than 100 micrograms/ml) of purified human AFP were shown to induce strongly dose-dependent growth inhibition of human hepatoma HepG2 cells, human lymphoblastoma MT4 cells, lymphoma Jurkat cells and murine fibroblastoma L929 cells. Human mammary carcinoma MCF-7 cells also revealed a growth inhibitory response to AFP, although to a lesser extent. Equivalent doses of human serum albumin (HSA) demonstrated no effect on these cells. On the contrary, normal embryonal fibroblasts of different organ origin showed dose-dependent stimulation (50-90%) of proliferation in response to AFP. A similar stimulative effect was obtained when embryonal fibroblasts were treated with the same doses of HSA. The myeloblastoma cell line U-937 and the normal epidermal fibroblast cell line M19 were shown to be resistant to the AFP action over a wide range of protein concentrations. It was demonstrated that growth factor deprivation (i.e. low serum concentration) could stimulate U-937 cell proliferation in response to high doses of AFP. It was also shown that intens...Continue Reading

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