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  • Title: Characterization of the inhibitory effects of transforming growth factor-beta on a human colon carcinoma cell line.
    Author: Hoosein NM, Brattain DE, McKnight MK, Levine AE, Brattain MG.
    Journal: Cancer Res; 1987 Jun 01; 47(11):2950-4. PubMed ID: 3471320.
    Abstract:
    The effects of transforming growth factor-beta (TGF beta) on a human colon carcinoma cell line (MOSER) were investigated. TGF beta, at low concentrations (between 0.1 and 1.0 ng/ml), inhibited the proliferation of MOSER cells both in monolayer culture and soft agarose, in a dose-dependent manner. MOSER cells adapted to growth in chemically defined serum-free medium were more sensitive to the inhibitory effects of TGF beta than cells maintained in serum-supplemented medium. Morphological changes in MOSER cells, observed with TGF beta, were similar to those seen with the chemical differentiation agent N,N-dimethylformamide. Also in similarity to the effects of N,N-dimethylformamide, TGF beta induced a time- and concentration-dependent increase in soluble extracellular fibronectin. Binding studies with [125I]TGF beta revealed a relatively low number of binding sites on MOSER cells (13%) compared with mouse embryo fibroblastic (AKR-2B) cells. Thus far, other colon carcinoma cell lines, some displaying TGF beta receptors, have been reported to be unresponsive to TGF beta. This study is therefore the first to demonstrate a TGF beta-responsive colon carcinoma cell line.
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