caa a22 4500 465765513 CHVBK 20180323111912.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF02544343 doi (NATIONALLICENCE)springer-10.1007/BF02544343 Contrasting effects of water-soluble and water-insoluble dietary fibers on bile acid conjugation and taurine metabolism in the rat [Elektronische Daten] [Takashi Ide, Masaharu Horii, Tadashi Yamamoto, Kenji Kawashima] The effect of the type of dietary fiber on the bile acid and taurine metabolism was examined in rats. Diets containing 10% of various water-soluble fibers (citrus pectin, konjak mannan, guar gum) as compared to a fiber-free diet increased biliary excretion of total bile acids. In contrast, water-insoluble dietary fibers (cellulose, corn bran, chitin; 10% in the diets) as well as cholestyramine (5% in the diet) considerably, decreased bile acid excretion. Water-soluble dietary fibermediated increases in bile acid excretion were totally attributable to increases in glycine-conjugates. Thus, these fibers greatly increased by the bile acid glycine-to-taurine ratio (G/T). Excretio of glycine conjugates decreased more than that of taurine conjugates in rats fed various water-insoluble dietary fibers. As a results, G/T in rats fed water-insoluble fibers was significantly lowered as compared to G/T in animals fed a fiber-free diet. Cholestyramine did not affect the G/T ratio of bile acids. Fecal bile acid excretion and the activities of hepatic cholesterol 7α-hydroxylase (EC 1.14.13.17) in rats fed various water-soluble dietary fibers approximately doubled as compared to the respective values for rats fed a fiber-free diet. Whereas cholestyramine greatly increased these parameters, water-insoluble fibers did not significantly affect them. Various water-soluble fibers decreased hepatic concentration and urinary excretion of taurine as well as the activity of hepatic cysteine dioxygenase (EC 1.13.11.20). In contrast, water-insoluble fibers considerably increased hepatic taurine concentrations and enzyme activities. The parameters for taurine metabolism were unaffected by cholestyramine. It was suggested that the types of dietary fiber affected hepatic taurine synthesis and thus modified bile acid glycine/taurine ratios. American Oil Chemists' Society, 1990 Ide Takashi Laboratory of Nutrition Chemistry, National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, 305, Tsukuba, Japan aut Horii Masaharu Laboratory of Nutrition Chemistry, National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, 305, Tsukuba, Japan aut Yamamoto Tadashi Laboratory of Nutrition Chemistry, National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, 305, Tsukuba, Japan aut Kawashima Kenji Laboratory of Nutrition Chemistry, National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, 305, Tsukuba, Japan aut Lipids Springer-Verlag 25/6(1990-06-01), 335-340 0024-4201 25:6<335 1990 25 11745 https://doi.org/10.1007/BF02544343 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02544343 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ide Takashi Laboratory of Nutrition Chemistry, National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, 305, Tsukuba, Japan aut NATIONALLICENCE 700 1- Horii Masaharu Laboratory of Nutrition Chemistry, National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, 305, Tsukuba, Japan aut NATIONALLICENCE 700 1- Yamamoto Tadashi Laboratory of Nutrition Chemistry, National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, 305, Tsukuba, Japan aut NATIONALLICENCE 700 1- Kawashima Kenji Laboratory of Nutrition Chemistry, National Food Research Institute, Ministry of Agriculture, Forestry and Fisheries, 2-1-2 Kannondai, 305, Tsukuba, Japan aut NATIONALLICENCE 773 0- Lipids Springer-Verlag 25/6(1990-06-01), 335-340 0024-4201 25:6<335 1990 25 11745 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer