Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.2.1.26 (invertase)
 4,927 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Individuals with chronic renal failure (CRF) may have a variety of gastrointestinal (GI) problems, including dyspepsia, acid peptic disease, and bacterial overgrowth. We investigated gastrointestinal function in 11 uremic patients, seven of whom were on dialysis three times a week and four who were not on dialysis. Ten normal subjects were studied as controls. The nutritional status of the patients did not differ from that of the control subjects. Seven patients demonstrated abnormal GI endoscopic findings, although none was severe; they also had prolonged oral-cecal transit times but had no evidence of bacterial overgrowth, and all had normal numbers of lymphocyte subpopulations within the intestinal mucosa. The patients had significantly reduced activities of mucosal sucrase and maltase but not of lactase. In spite of the reductions in these enzymatic activities, carbohydrate malabsorption was not evident in the CRF group, probably because of the vast reserve of the small intestine. No differences were noted between the groups in the activities of several intestinal peptidases. From these data, we concluded that GI function is essentially normal in patients with CRF and postulate that this normality, which is in contrast to previous findings, is related to recent advances in the clinical management of uremic patients.
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PMID:Gastrointestinal function, morphology, and immune status in uremia. 213 74

We studied 24 patients with end-stage chronic renal failure not treated with hemodialysis (CRF1) and 16 patients on regular hemodialysis (CRF2), to investigate the digestive, absorptive and morphological aspects of the small intestinal mucosa. Serum d-xylose test and biochemical parameters of absorption (serum calcium and proteins) were determined. Jejunal mucosal biopsies were obtained and tissue homogenates assayed for disaccharidases (sucrase, maltase and lactase) and dipeptidases (glycyl-glycinase, leucyl-glycinase and leucyl-aminopeptidase). Histological changes were classified according to the severity of abnormality and compared with biopsies obtained from control subjects. Serum d-xylose test, calcium and proteins were normal in patients with CRF. Maltase specific activity was higher in CRF1 than in controls (p less than 0.05). Lactase and leucyl-aminopeptidase showed a tendency to decrease in CRF, but this difference did not reach statistical significance. Sucrase, glycyl-glycinase and leucyl-glycinase specific activity in CRF was similar to the control group. Histological changes of the small intestinal mucosa of mild to moderate degree were noted in 68% of patients with CRF vs 36% in control subjects (p less than 0.01). No significant difference was noted in the incidence of absorptive, enzymatic (with the exception of maltase) and histological changes between the two groups of patients with CRF. These changes are not influenced by hemodialysis, a long-term treatment averaging 6 months, they appear to represent primary manifestations of CRF and may be related to the nutritional status of patients with CRF.
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PMID:Small intestinal function and structure in patients with chronic renal failure. 339 24