Effect of chronic intake of dietary fibers on the ultrastructural topography of rat jejunum and colon: a scanning electron microscopy study

This report is an attempt to quantitate the observable topographical characteristics of small and large intestine after a specific dietary regimen under well-defined states of lipid absorption and metabolism. Alfalfa, white wheat bran, cellulose, and pectin were fed for 6 wk at a level of 15 g/100 g...

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Veröffentlicht in:The American journal of clinical nutrition 1981-02, Vol.34 (2), p.218-228
Hauptverfasser: Cassidy, M M, Lightfoot, F G, Grau, L E, Story, J A, Kritchevsky, D, Vahouny, G V
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container_start_page 218
container_title The American journal of clinical nutrition
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creator Cassidy, M M
Lightfoot, F G
Grau, L E
Story, J A
Kritchevsky, D
Vahouny, G V
description This report is an attempt to quantitate the observable topographical characteristics of small and large intestine after a specific dietary regimen under well-defined states of lipid absorption and metabolism. Alfalfa, white wheat bran, cellulose, and pectin were fed for 6 wk at a level of 15 g/100 g diet to four groups of rats (12 rats per dietary group). A 5th control group was maintained on Purina Rat Chow. Three animals from each group were blind-coded for morphological assessment. After anesthesia, the jejunum and mid-colon were removed and processed for scanning electron microscopy. Beginning with the mildest mucosal surface changes, the observed order in terms of increasing severity is bran < cellulose < pectin < alfalfa. Our observations suggest that altered rates of cell loss in intestinal tract cytokinetics may be occurring with particular feeding patterns and should be considered as a possible mechanism in the nutritional consequences of dietary fiber intake.
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subjects alfalfa
Animals
bran
cellulose
Cellulose - pharmacology
Colon - drug effects
Colon - ultrastructure
Dietary fiber
Dietary Fiber - pharmacology
Intestinal Mucosa - ultrastructure
intestine
Jejunum - drug effects
Jejunum - ultrastructure
Male
Medicago sativa
Microscopy, Electron, Scanning
Microvilli - ultrastructure
mucosal surface
pectin
Pectins - pharmacology
Rats
scanning microscopy
Triticum
title Effect of chronic intake of dietary fibers on the ultrastructural topography of rat jejunum and colon: a scanning electron microscopy study
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