Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.2.1.108 (lactase)
 2,133 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Morphologic and functional adaptations of the functioning intestine were evaluated in 41 patients before and after biliopancreatic bypass for morbid obesity. This surgical procedure diverts pancreatobiliary secretions via the duodenum and the jejunum into the colon, the remaining small intestine being anastomosed to the stomach after antrectomy. In the proximal ileum there was an 80% increase of the height of villi; the specific activities of maltase, sucrase, and aminopeptidase in brush border membranes remained unaffected, and that of lactase tended to decrease. In the distal ileum villi heights increased only by 58%, and disaccharidase activities (except for maltase) were slightly enhanced. In the colon the mucosa displayed, in some patients, focal appearance of true villi, and brush border enzyme activities increased concomitantly. We conclude that biliopancreatic bypass induces an adaptation of all intestinal segments of the functioning intestine; this adaptation tends to compensate for the shortening of the gut continuity.
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PMID:Small-intestinal and colonic changes after biliopancreatic bypass for morbid obesity. 310 Nov 67

A series of mucosal enzymes were estimated by analysis of homogenized biopsy specimens from the lower duodenal flexure, obtained from 10 large-bowel carcinoma patients, 15 patients with morbid obesity, and 15 controls. In 11 subjects the distribution along the upper small intestine was determined. The activities of the brush border enzymes lactase (p less than 0.01), neutral-alpha-glucosidase (p less than 0.01), and alkaline phosphatase (p less than 0.05) were significantly lower in the large-bowel carcinoma patients than in the controls. In obese subjects significantly lower activities (p less than 0.05) were demonstrated for the basolateral membrane enzyme 5'-nucleotidase and the lysosomal enzymes N-acetyl-beta-D-glucosaminidase and acid beta-glucuronidase, when compared with those in controls. Compared with the enzyme levels of the duodenal bulb, significantly higher activities of a series of enzymes were demonstrated at both the lower duodenal flexure and the angle of Treitz.
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PMID:Influence of remote cancer and obesity on, and distribution of mucosal enzymes in, the upper small intestine. 377 58

Biliopancreatic bypass (BPB), the exclusion of a duodenojejunal loop from the digestive continuity, has been proposed as a bariatric procedure for treatment of morbid obesity. The present study in rats investigated the effect of this surgical procedure on the mucosae of the ileum directly anastomosed to the stomach, and of the jejunum irrigated only by biliopancreatic secretions. The proximal part of the ileum adapted by two-fold increases in its mucosal mass, total protein and RNA content; DNA content was four-fold higher than in sham-operated animals. There was a correlated increase of mucosal enzyme content, except for lactase. In the distal ileal mucosae, a slight, transient augmentation of mucosal mass, protein, DNA and RNA content was observed which tended to compensate for the shortening of the functional gut. No morphological changes were found in the excluded loop, probably because of an endoluminal stimulation by biliopancreatic secretions. Thus, in BPB, biliopancreatic secretions seem to exert trophic effects on the intestinal mucosa, but they are less potent than the endoluminal nutrition that restores the oral-aboral mucosal gradient.
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PMID:Trophic and enzymatic adaptation of the intestine to biliopancreatic bypass in the rat. 769 35