Səhifə 1 dan 51 nəticələr
Cobalamin (Cbl; vitamin B(12)) malabsorption in pancreatic insufficiency can be partially corrected by bicarbonate and completely corrected by pancreatic proteases but the mechanisms involved are unknown. Because saliva contains enough R-type Cbl-binding protein (R protein) to bind all of the
The sensitivity of human intestinal lactase to pancreatic proteases was tested both in vitro and in vivo. Lactase specific activity in brush border membranes was decreased by 26%-27% during incubation with trypsin at pH 7.0 in patients with normal intestinal lactase levels, whereas in patients with
Pancreatic enzyme extracts have been used for several decades to decrease maldigestion of macro- and micronutrients due to pancreatic insufficiency and to alleviate various abdominal symptoms, including the pain of alcohol-induced chronic pancreatitis and distal intestinal obstruction. Decreasing
7 patients suffering from severe exocrine pancreatic insufficiency have been treated with a lipolytic enzyme extracted from Rhizopus arrhizus. Comparing the fungal lipase with a placebo the drug lowered the daily stool weight from 809 g to 443 g on an average, i.e. by 45.2%. The steatorrhea was
The activities of pancreatic enzymes decrease during their passage from the duodenum to the terminal ileum, but degradation rates of individual enzymes are different. Whereas lipase activity is lost most rapidly, proteases and amylase are more stable. The mechanism by which lipase activity is
Crude preparations of hog gastric intrinsic factor or their own previously collected gastric juices administered with labeled vitamin B12 did not enhance vitamin B12 absorption in patients with vitamin B12 malabsorption secondary to pancreatic insufficiency. However, when these sources of gastric
Introduction: The Food and Drug Administration in 2006 required that all pancreatic enzyme products demonstrate bioavailability of lipase, amylase, and protease in the proximal small intestine.
Methods:
Pancreatic insufficiency (PI) when left untreated results in a state of malnutrition due to an inability to absorb nutrients. Frequently, PI is diagnosed as part of a larger clinical presentation in cystic fibrosis or Shwachman-Diamond syndrome. In this study, a mouse model for isolated exocrine PI
The indication for initiation of a replacement therapy with pancreatic enzymes in the course of ongoing exocrine pancreatic insufficiency is clinically given with the appearance of loss of body weight, steatorrhea with stool fat excretion of more than 15 g per day, dyspeptic symptoms with strong
Pancreatic elastase 1 (E1), a digestive protease, is synthesized by the acinar cells of the pancreas. Using an enzyme-linked immunosorbent assay, we evaluated stool E1 levels in the following groups of patients. (a) Specimens submitted for occult blood examination from 20 adults, over 3 consecutive
In vitro studies indicate that [(57)Co]cobalamin (Cbl) is preferentially bound to salivary R protein as opposed to intrinsic factor (IF) and that [(57)Co]Cbl bound to R protein is not transferred to IF at either pH 2 or pH 8. Incubation of R protein-[(57)Co]Cbl with pancreatic proteases causes a
A specific method for pancreatic elastase II activity analysis was developed. True elastase II activity could be discriminated from that of elastase I and chymotrypsin. The postnatal development of four pancreatic proteases in the duodenal juice of children and in the pancreatic homogenates of
This paper reviews the role of pancreatic proteases (focusing upon trypsin, chymotrypsin and elastase) in the diagnosis and management of chronic pancreatic insufficiency (CPI), emphasizing advances over the last 5 years. Some important novel aspects of these enzymes in acute pancreatitis are also
A genetically conditioned mouse model of exocrine pancreatic insufficiency (epi) has been used to study the effect of the absence of lumenal proteases on small intestinal mucosal proteins. The small bowel was divided into eight equal segments. Enzyme activity was increased only in the first three
The roles of extracellular and intracellular mechanisms in the degradation of brush border proteins have been investigated by studying the small intestinal mucosa of dogs with naturally occurring exocrine pancreatic insufficiency. Peroral jejunal biopsies were homogenised and the organelles