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- W2112135750 abstract "Epidemiological studies suggest that βcarotene is able to modulate the risk of cancer. A number of in vitro studies reported that βcarotene inhibits the growth of cancer cells; however, so far little is known about the molecular mechanisms of the antiproliferative effect of βcarotene. Here we have investigated the effects of two βcarotene preparations, (i) βcarotene dissolved in tetrahydrofuran (final concentration in cell culture medium: 0.5%) and (ii) βcarotene incorporated in a water dispersible bead form, on cultured human colon carcinoma cells HT29. The treatment of cells with βcarotene up to 30 M for 72 h led to a significant increase in the cellular βcarotene concentration and formation of retinol. βCarotene showed only low cytotoxicity for confluent cells tested up to 30 M, but at dietary relevant concentrations for the intestinal tract (10, 30 M) βcarotene was strongly cytotoxic for growing cells and induced apoptosis in HT29 cells as assessed by the AnnexinV assay (the maximal effect was observed 15 h after treatment with βcarotene). Exposure of cells to retinol at concentrations yielding cellular retinol levels similar to those observed by βcarotene treatment had no antiproliferative or cytotoxic effect. Furthermore, βcarotene did not affect the activation of the extracellular signalregulated kinases (ERK1 and ERK2) that are essential for cellular growth. In summary, βcarotene can inhibit growth of human colon carcinoma cells in vitro by induction of apoptosis in proliferating cells." @default.
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- W2112135750 date "2001-01-19" @default.
- W2112135750 modified "2023-10-18" @default.
- W2112135750 title "β-Carotene Inhibits Growth of Human Colon Carcinoma Cells in Vitro by Induction of Apoptosis" @default.
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- W2112135750 doi "https://doi.org/10.1515/bc.2001.201" @default.
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