Sugar composition of water-soluble dietary fiber prepared from baobab (Adansonia digitata) fruit pulp, and evaluation of glucose tolerance in rats
2015
Yonezawa, K. (Junior College of Tokyo University of Agriculture, Setagaya-ku, Tokyo (Japan). Department of Nutrition) | Tanioka, Y. | Ishida, H. | Shimada, T. | Furusho, T.
In this study, soluble dietary fiber (SDF) prepared from baobab (Adansonia digitata) fruit pulp (BFP) was found to be composed of 82.9% acidic and 10.1% neutral sugar. When the methoxylated content of BFP-SDF was assayed, the proportion of methoxylated galacturonic acid was found to be 14.1%. The effect of BFP-SDF on the regulation of blood glucose level was examined in vitro and in vivo. BFP-SDF significantly reduced both glucose diffusion and permeation rates in cultured Caco-2cells. In oral glucose-tolerance tests conducted on Sprague-Dawley rats, compared to control rats administered 40% glucose solution, rats administered 40% glucose solution supplemented with 5% or 10% BFP-SDF showed significantly decreased postprandial blood glucose levels at 90 min and 120 min after administration. These results suggest that inclusion of BFP-SDF in the diet has a hypoglycemic effect in mammals, mainly due to a decrease in the diffusion of ingested glucose in the intestine.
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