Dietary Regulation of Small-intestinal Disaccharidases.
نویسندگان
چکیده
منابع مشابه
Specificity of the Human Intestinal Disaccharidases
The existence of several different a-glucosidases has recently been demonstrated in extracts of pig intestinal mucosa (1-7). These enzymes have varying specificity for disaccharides with a-D-glucopyranoside structure (e.g., maltose, sucrose, isomaltose, trehalose), and thus the intestinal hydrolysis of these sugars is caused by a more complicated enzyme mixture than had been previously believed...
متن کاملSimilarity of hydrolyzing activity of human and rat small intestinal disaccharidases
BACKGROUND The purpose of this study was to clarify whether it is possible to extrapolate results from studies of the hydrolyzing activity of disaccharidases from rats to humans. MATERIALS AND METHODS We measured disaccharidase activity in humans and rats using identical preparation and assay methods, and investigated the similarity in hydrolyzing activity. Small intestinal samples without ma...
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Disaccharidases (DS) are brush border enzymes embedded in the microvillous membrane of small intestinal enterocytes. In untreated coeliac disease (CD), a general decrease of DS activities is seen. This manuscript reviews different aspects of DS activities in CD: their utility in the diagnosis and their application to in vitro toxicity testing. The latter has never been established in CD researc...
متن کاملEffect of diet upon intestinal disaccharidases and disaccharide absorption.
The administration of a carbohydrate-containing diet for 24 hours to rats previously fasted for 3 days led to a twofold increase in total intestinal sucrase and sucrase specific activity. The specific activity of maltase was similarly increased, but lactase activity was unaffected. The sucrose-containing diet led to a greater increase in sucrase than maltase activity, whereas the converse was t...
متن کاملStudies on the Ultrastructural Localization of Intestinal Disaccharidases
It is now firmly established that disaccharidases are an intrinsic part of the mammalian intestinal (1) and renal (2) brush border. Isolated brush borders of hamster and rabbit intestine (3-6) are studded with knobs (65 A in diameter) or doughnut-shaped particles (45-110 A in diameter) respectively, when viewed as negatively stained preparations . Isolated brush borders of rabbit kidney do not ...
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ژورنال
عنوان ژورنال: Nippon Eiyo Shokuryo Gakkaishi
سال: 1994
ISSN: 1883-2849,0287-3516
DOI: 10.4327/jsnfs.47.81