Abstract
It is thought that eating habits induces individual variation in intestinal absorption and metabolism of drugs. The objective of this research was to clarify the influence of vegetables juices on CYP3A4 activity, which is an important enzyme in intestine. Five vegetables juices (VJ-o, Kagome Original(®); VJ-g, Kagome 30 kinds of vegetables and fruits(®); VJ-p, Kagome Purple vegetables(®); VJ-r, Kagome Sweet Tomato(®); and VJ-y, Kagome Fruity Salada(®); KAGOME Co., Ltd., Aichi, Japan) were centrifuged (1630×g, 10 min) and filtered using filter paper and 0.45-µm membrane filters. In this study, recombinant CYP3A4 and LS180 cells were used for the evaluation of CYP3A4 activity. The metabolisms to 6β-hydroxytestosterone by recombinant CYP3A4 were significantly inhibited by VJ-o, VJ-g, and VJ-y in a preincubation time-dependent manner, and CYP3A4 activity in LS180 cells were significantly inhibited by VJ-o and VJ-y. These results show that the difference in ingestion volume of vegetable juices and vegetables might partially induce individual difference in intestinal drug metabolism.
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