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The developmental changes in the ability of the small intestinal epithelium to take up and transfer into blood the macromolecules bovine serum albumin (BSA), bovine immunoglobulin G (BIgG), and fluorescein isothiocyanate-labeled dextran 70,000 (FITC-dextran) were studied in guinea pigs 0-14 days of age. In addition, in the same animals, the activities of the proteases ca-thepsin B and D within the
We report the presence of platelet-activating factor (PAF-acether; l-0-alkyl-2-acetyl-.v«-glycero-3-phosphocholine) in small-intestinal and colonic mucosa of neonatal rats. The PAF-acether content was higher in the colon than in the small intestine, and was lower in the small intestine of 30-day-old animals than in 14-day-old animals. We also report that cultured intestinal epithelial cells (INT 4
C. A. de Wit and B. R. Weström. Purification and characterization of α2-, α2-β- and β-macroglobulin inhibitors in the hedgehog, Erinaceus europaeus: β-macroglobulin identified as the plasma antihemorrhagic factor. Toxicon 25, 1209 - 1219, 1987. - Three macroglobulin inhibitors were purified from hedgehog (Erinaceus europaeus) plasma by sequential chromatography on Cibacron Blue Sepharose, Sephacry
High concentrations of insulin (411 ± 214 μU/ml), neurotensin-like (265 ± 72 pg/ml), and bom-besin-like immunoreactivities (1995 ± 288 pg/ml) were detected in porcine colostrum using radioimmunoassay, as compared to the levels found in sow blood serum at farrowing (5 μU/ml, <12 pg/ml, and 17 pg/ml, respectively). After 72 h of lactation, the levels of insulin and neurotensin-like immunoreactivitie
We have studied the development of phospholipase A2 (PLA2) and lysophosphatidylcholine (lysoPC)-metabolising enzyme activities in the neonatal rat intestine and its relation to the intestinal permeability of macromolecules. The permeability was determined by feeding young rats a mixture of bovine serum albumin, bovine immunoglobulin G and fluorescein-isothiocyanate-conjugated dextran 70,000, and a
Die Charakterisierung der im Schweineserum vorhandenen Inhibitorfraktionen fur Trypsin, Chymotrypsin und Elastase wurde durch Gelfiltration über Ultrogel AcA44 und Aga-rosegelelektrophorese mit anschließender Demonstration der Hemmaktivität der getrennten Fraktionen durchgeführt. Die Inhibitorfraktionen aus der Gelfiltration wurden weiterhin mittels Antikörper identifiziert, die gegen die Protease
We studied the neural and hormonal regulation of the secretion of pancreatic spasmolytic polypeptide (PSP), a potential growth factor, from isolated perfused porcine pancreas and the pancreatic exocrine secretion of PSP in response to a meal in young conscious pigs. PSP concentrations in the pancreatic juice ranged from 1 to 180 μg/ml. PSP released to the venous effluent amounted to 0.4-7% of the
Four groups of eight newborn calves were used to study the intestinal transmission of colostral immunoglobulin from the intestinal lumen to the blood circulation. The first feed was given one, eight, 16 or 24 hours after birth. Thereafter, three feeds were given with eight hour intervals. All feeds were from the same pool of colostrum and the amount fed each time corresponded to 3 per cent of the
Abstract: The degradation of the vasopressin analogue dDAVP was studied by reversed phase high‐performance liquid chromatography (HPLC) after incubations in pancreatic juice and intestinal mucosa homogenates. dDAVP remained stable in pancreatic juice for a period of 60 min. while the parent hormone arginine vasopressin (AVP) was completely degraded within 5 min. In intestinal mucosa homogenates d
Wang Q, Pantzar N. Jeppsson B, Weström BR, Karlsson BW. Increased intestinal marker absorption due to regional permeability changes and decreased intestinal transit during sepsis in the rat. Scand J Gastroenterol 1994;29:1001-1008. Background: The intestinal barrier properties are impaired during inflammation and sepsis, but the mechanisms behind this are unknown and were therefore investigated du
A rat model was developed to assess bidirectional passage of macromolecules and low-molecular-weight markers across the intestinal barrier in intact and injured mucosa. Isolated in situ loops of distal small intestine were luminally perfused for 30 min with saline as control or HCl (pH 2.0) to induce an acute injury. The lumen-to-blood passage was followed during perfusion with bovine serum albumi
The development of exocrine pancreas function was studied in Swedish Landrace pigs surgically fitted with a chronic pancreatic duct catheter and a duodenal re-entrant cannula. The juice secretion and output of total protein and trypsin activity were followed before (basal secretion) and after feeding (postprandial secretion) during the first 1-13 weeks of life. The results showed that throughout t
Using electroimmunoassay the levels of the individual protease inhibitors, α2-macroglobulin f, α2-macroglobulin s, inter-α-trypsin inhibitor, α1-protease inhibitor and α2-antitrypsin were studied in the serum and the amniotic fluid during the fetal and postnatal development of the pig. High concentrations, far above the adult ones, of α2-antitrypsin and especially α1-protease inhibitor, were obser
Protease inhibitors and protease (caseinolytic, elastinolytic and esterolytic) activity were analysed in 190 milk samples from 94 mothers from day 1 to day 160 after delivery The main protease inhibitors in human milk are α1-antichymotrypsin and α1-antitrypsin. As measured by electroimmunoassay, the level of α1-antichy-motrypsin in day 1 colostrum was higher than that in normal serum. Trace amount
The intestinal transmission of two macromolecular markers, of similar molecular weight but different susceptibility to proteolytic digestion, was investigated in the neonatal pig. Piglets of varying age (0 h-7 days old) were given a mixture of bovine scrum albumin (BSA) and fluorescein-isothiocyanalc labelled dextran 70,000 (FiTC-D 70) by stomach tube, and the scrum concentrations were determined
Monoclonal gammopathy of undetermined significance (MGUS) is the precursor of multiple myeloma (MM) and related disorders. MGUS is characterized by asymptomatic paraproteinemia. In some cases, multiple paraproteins can be identified but the clinical implications of this phenomenon are poorly understood. In this study, we aim to inform the approach to this challenging MGUS subgroup by utilizing dat
