Effects of Pullulan and Cellulose on the Gastrointestinal Tract of Rats

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  • OKU Tsuneyuki
    Department of Nutrition, School of Health Sciences, Faculty of Medicine, University of Tokyo
  • YAMADA Kazuhiko
    Department of Nutrition, School of Health Sciences, Faculty of Medicine, University of Tokyo
  • HOSOYA Norimasa
    Department of Nutrition, School of Health Sciences, Faculty of Medicine, University of Tokyo

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Other Title
  • 白ネズミ消化管に及ぼすプルランならびにセルロースの影響
  • ハク ネズミ ショウカカン ニ オヨボス プルラン ナラビニ セルロース ノ

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Description

The influences of pullulan and cellulose on the growth, digestive tracts and intestinal disaccharidi-dases were studied for rats raised on the diets containing various concentrations of pullulan and cellulose.<BR>1. When rats were fed with the diets containing 20% or 40% of pullulan, the gain of body weight was suppressed remarkably. The growth curve of rats fed with the diet containing 40% cellulose was relatively similar to those of the groups given the pullulan diets.<BR>2. The increase of weight of the stomach, small intestine, caecum and large intestine was recognized in the groups given a diet containing 20% and 40% pullulan. The hypertrophic change was great in the caecum. When the rats were given cellulose diets, the weight of large intestine was increased. The intensity of hypertrophy and the site of influence in the digestive tracts of the rats were different depending on the feeding period and the concentration of pullulan and cellulose in the diet. The organs, except for the digestive tracts, were not affected by the diets containing pullulan and cellulose.<BR>3. The activities of maltase, sucrase and isomaltase in the small intestine were not affected by the pullulan and cellulose feeding. However, pullulan was partially hydrolyzed by the enzyme in the small intestinal mucosa in vitro.<BR>4. Also, pullulan was partially digested in the small intestine within a 60 minute period, when pullulan was administered to the stomach using a zonde.<BR>From these results, pullulan seems to be a carbohydrate which is resistant to the intestinal digestion of the rat. The hypertrophy of the intestinal tracts may be due to a physiological adaptation for the unavailable carbohydrate.

Journal

  • Eiyo To Shokuryo

    Eiyo To Shokuryo 32 (4), 235-241, 1979

    JAPAN SOCIETY OF NUTRITION AND FOOD SCIENCE

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