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(1) We investigated the trophic effect of pectin on the intestinal mucosa injured by formyl methionyl-leucyl-phenylalanine (FMLP), a chemoattractant produced by the intestinal bacterial flora. (2) We first demonstrated that oral administration of FMLP for 7 days reduced the disaccharidase activities and increased the permeability, measured by fluorescein-isothiocyanate-conjugated dextran, of rat small intestine. (3) After 7 days of FMLP administration, rats were divided into fiber-free group which was given liquid elemental diet (Elental) and the pectin group which was given Elental supplemented with 2.5% pectin. (4) After 3 days of feeding (Day 3), the maltase activities of the pectin group was significantly greater than that of the fiber-free group and than that of the initial level just after the 1 week administration of FMLP. At Day 7, there was no difference of maltase activity between the two groups. The sucrase activity of the pectin group was also significantly greater than that of fiber-free group at Day 3. (5) Plasma enteroglucagon was significantly increased in the pectin group. We conclude that pectin-supplemented diet promoted the recovery of disaccharidase activities in the FMLP-injured intestinal mucosa which may be mediated by enteroglucagon.

Effect of Pectin on Formyl Methionyl-Leucyl-Phenylalanine(FMLP)-injured Intestinal Mucosa of Rat.