Effects of galacto-oligosaccharide and bacterial status on mucin distribution in mucosa and on large intestine fermentation in rats
| Autor: | Odette Szylit, Martine Bensaada, Jean-Claude Meslin, Takashi Sakata, P. Beaumatin, Françoise Popot, Claude Andrieux, M. Durand |
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| Přispěvatelé: | Laboratoire de nutrition et sécurité alimentaire, Institut National de la Recherche Agronomique (INRA), Unité de recherche d'Écologie et Physiologie du Système Digestif (UEPSD), ProdInra, Migration |
| Rok vydání: | 1993 |
| Předmět: |
Male
medicine.medical_specialty Colon Medicine (miscellaneous) Oligosaccharides Caecum chemistry.chemical_compound Internal medicine medicine Animals Germ-Free Life Large intestine Intestine Large Intestinal Mucosa Cecum Nutrition and Dietetics biology Bacteria Mucin Mucins Hindgut Metabolism TOS biology.organism_classification Fatty Acids Volatile beta-Galactosidase Rats Inbred F344 Lactic acid Rats [SDV.AEN] Life Sciences [q-bio]/Food and Nutrition medicine.anatomical_structure Endocrinology chemistry Fermentation RAT Digestion [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition |
| Zdroj: | Scopus-Elsevier British Journal of Nutrition British Journal of Nutrition, Cambridge University Press (CUP), 1993, 69, pp.903-912 |
| ISSN: | 0007-1145 1475-2662 |
| Popis: | The purpose of the present paper was to study the effects of a dietary undigestible carbohydrate and intestinal microflora on mucin distribution (neutral, acid, sulphonated), glycolytic activities: η-D-galactosidase (EC3.2.1.23),N-acetyl-η-D-galactosaminidase (Ec3.2.1.43),N-acetyl-η-D-gluco-saminidase (EC3.2.1.30), β-L-fucosidase (EC3.2.1.51) and bacterial metabolism (gas production, short-chain fatty acids (SCFA) and lactic acid caecal concentration) in germ-free (GF), conventional (CV) and heteroxenic (HE) rats (GF rats associated with a human flora). Rats were fed on either a control diet or a diet containing 40 gtrans-galactosylated oligosaccharide (TOS)/kg. In GF rats fed on the control diet caecal pH was almost neutral and glycolytic activities negligible. The number of mucus- containing cells increased from the caecum to the colon for the three types of mucin. TOS had no effect in the caecum but it modified mucin cell repartition in the colon. In CV and HE rats fed on the control diet caecal pH was similar (6.8), but caecal SCFA and lactic acid concentrations (μmol/g) and gas production (m1/24 h) were higher in CV (70, 5.9 and 2.3 respectively) than in HE rats (32, 4.6 and 0.4 respectively). In CV, as in HE rats, acid-mucin-containing cells increased from the caecum to the colon and glycolytic activities were similar. TOS reduced acid-mucin-containing cells in the caecum of CV rats by twofold but had no effect in either the caecum or the colon of HE rats. TOS strongly increased η- galactosidase activity and slightly modified the other glycolytic activities. Its effect on bacterial metabolites depended on bacterial status. However, comparison between CV and HE rats showed no evident relationship between the number of mucus-containing cells and measured bacterial metabolites. Differences between CV and HE rats might be due to bacterial microflora specificity. TOS had an intrinsic effect on mucus cell distribution in the colon of GF rats. In CV and HE rats the presence of the flora abolished this effect. |
| Databáze: | OpenAIRE |
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