Feeding of potato starch increases maltase and sucrase activity only in duodenal segment of the small intestine in rats
2008
Mineo, H.(Hokkaido Bunkyo Univ., Eniwa (Japan)) | Kanazawa, T. | Morikawa, N. | Ishida, K. | Ohmi, S. | Machida, A. | Noda, T. | Fukushima, M. | Chiji, H.
Adaptation of digestive enzymes in the small intestine and pancreas was evaluated in rats fed different types of starch. Male Sprague-Dawley rats at 6 weeks were fed 3 types of diet containing, corn starch, or two kinds of potato starch with different phosphorus contents. The changes in sucrase, maltase and lactase activities in the duodenum, jejunum, jejuno-ileum and ileum of the small intestinal tract, and alpha-amylase activity in the pancreas were determined at 1, 3 and 5 weeks of feeding. There were significant differences in sucrase and maltase, but not lactase activity in the duodenum among the 3 starch groups. There were no differences in jejunal and ileal disaccharidase, and pancreatic alpha-amylase activity among the 3 diet groups. Thus, adaptation of disaccharidase to different type of starch occurred locally in the duodenal segment but not in subsequent lower segments of the small intestine in rats.
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