ウーロン茶はα-アミラーゼ活性を低下させる : 唾液α-アミラーゼ活性を指標として膵α-アミラーゼ活性を評価する

概要

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Suppression of the salivary and pancreatic α-amylase activities by the oolong tea was assayed by means of the iodine-starch reaction in vitro and photometric measurements of the reaction products. Within a range of dilution of oolong tea used, activities of human salivary α-amylase as well as porcine pancreatic one were suppressed dose-dependently (1/33 and 1/5, respectively). Linear correlation between suppression rates for the human salivary α-amylase activity and those for the porcine pancreas were observed within the range of oolong tea concentrations used. These finding suggested that daily ingest of the tea might suppress pancreatic α-amylase in vivo to reduce glucose uptake into the blood stream via the intestinal epithelium.
石巻専修大学の論文