Prebiotic effects of fermentable carbohydrate polymers may be modulated by faecal bulking of non-fermentable polysaccharides in the large bowel of rats
Autor: | Cloe Erika De Guzman, Gunaranjan Paturi, Nicole C. Roy, Christine A. Butts, Wayne Young, Juliet Ansell, Andrew McLachlan, John A. Monro |
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Rok vydání: | 2012 |
Předmět: |
chemistry.chemical_classification
biology Prebiotic medicine.medical_treatment Inulin food and beverages Carbohydrate biology.organism_classification Polysaccharide Industrial and Manufacturing Engineering Caecum Butyric acid chemistry.chemical_compound chemistry medicine Food science Cellulose Food Science Bifidobacterium |
Zdroj: | International Journal of Food Science & Technology. 47:968-976 |
ISSN: | 0950-5423 |
DOI: | 10.1111/j.1365-2621.2011.02929.x |
Popis: | This study investigated the impact of supplementary fermentable polysaccharides inulin (a prebiotic) and barley I²âglucan on the large bowel, when consumed against a background high or low intake of mixed nonâstarch polysaccharide. Rats were fed for 28âdays with diets containing high (15%) and low (5%) background dietary fibre (BDF; cellulose plus sugar beet fibre), with or without 5% supplementary fermentable fibre (SFF; inulin or barley I²âglucan). HighâBDF diets unsupplemented with inulin or barley I²âglucan caused greater improvement than supplemented lowâBDF diets in several parameters linked to gut health: they increased colonic Bifidobacterium spp., butyric acid concentration in the caecum, and colonic crypt depth more than inulin and barley I²âglucan. For these parameters, inulin and barley I²âglucan added little to the effects of the highâBDF diet alone. Furthermore, by allowing for dilution due to the greater faecal bulk induced by the mixed fibre compared with inulin or barley I²âglucan, the total quantity of butyric acid in the colon of BDFâfed rats was greatly amplified. Interpretation of the effects of prebiotics in diets containing dietary fibre requires concurrent analysis of the multiple effects of nonâfermentable bulk. |
Databáze: | OpenAIRE |
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