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- W2012335306 abstract "Abstract. The development of an organ-culture system for rat colonic mucosa has enabled a direct assessment of the effect of epidermal growth factor (EGF) on cell division. An augmented mitotic index (AIm) has been employed to identify changes in cell proliferation. Explants of colonic mucosa from four animals were maintained in a medium containing serum for five days. On the fifth day of culture, half of the explants received fresh medium containing EGF (40 ng/ml) and the remainder (controls) fresh medium only. At 6,12,24 and 48 hr thereafter groups of both experimental and control explants received the metaphase-arresting drug vincristine (4 μg/ml) for 3 hr prior to fixation. The proportions of vincristine-arrested metaphases within the explants were determined. Analysis of the data indicates that when serum is present exogenous EGF exerts a trophic effect which increases with time (P < 0.001). In a second experiment colonic explants from four animals were maintained for five days in a serum-free medium and were then divided into groups, each of which received one of a range of concentrations of EGF. The AIm was determined for each group after 36 hr. It was found that increasing concentrations of EGF produce a small but significant increase in cell proliferation (P < 0.01). This effect, however, was less pronounced than that seen when serum was present. These results suggest that EGF has a trophic action on the colon and interacts with additional factors found in serum." @default.
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- W2012335306 date "1987-01-01" @default.
- W2012335306 modified "2023-09-23" @default.
- W2012335306 title "A trophic effect of epidermal growth factor (EGF) on rat colonic mucosa in organ culture" @default.
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- W2012335306 doi "https://doi.org/10.1111/j.1365-2184.1987.tb01081.x" @default.
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