Abstract

The action of coffee on the proliferation and invasion of a rat ascites hepatoma cell line of AH109A was investigated using in vitro and ex vivo assay systems. When rats were given oral intubation of instant coffee powder solution, the sera of those rats had the potent inhibitory activity on both the proliferation and invasion of AH109A. The activity of rat serum was both time- and dose-dependent. The instant coffee powder also inhibited the proliferation and invasion of AH109A in vitro. These results indicate that coffee has anti-proliferative and anti-invasive activity both in vitro and ex vivo. They also suggest that some anti-proliferative and anti-invasive material(s), which may be the ingredient(s) of coffee or their metabolites, appear in rat serum when rats are given oral intubation of coffee, although a possibility that host defense systems may be activated by the oral intubation of coffee cannot be ruled out.

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