Lennart Enerbäck

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PURPOSE Interstitial cystitis (IC) is a chronic disabling condition of unknown etiology. One of its major characteristics is an increase in mast cells (MC) showing signs of activation. It has been suggested that the proteinase content defines two MC types: MC(TC), containing chymase and tryptase, and MC(T), which contains tryptase but lacks chymase. Here,(More)
A cytofluorometric study on the binding of the fluorescent cationic dye Berberine sulphate to some tissue anions is reported. Measurements were performed on peritoneal cells and on models containing heparin or DNA. The dye was found to be suitable for cytofluorometric quantitation of heparin. At pH 4 a staining equilibrium was established when the dye(More)
Rats were infected with the nematode Nippostrongylus brasiliensis, resulting in an approx. 5-fold increase in the number of mucosal mast cells and the histamine content of the intestinal (jejunum) wall. After injection of the infected animals with inorganic [35S]sulphate, a similar increase in the yield of labelled intestinal glycosaminoglycans was(More)
The relationship between the IgE load on mast cells and their secretory capacity when challenged with anti-IgE was studied in peritoneal cells obtained from rats of three different strains, Hooded Lister (HL), Wistar Kyoto (WKY) and Sprague-Dawley (SD). IgE was determined cytofluorometrically after labelling with FITC-conjugated anti-IgE before and after(More)
Mast cells are often observed near nerves and functional evidence suggests an innervation of these cells. In the present ultrastructural study, nerve terminals containing many small clear vesicles and a few large vesicles with dense matrix were observed in direct contact with the plasma membrane of mucosal mast cells in the rat ileum, strongly suggestive of(More)
Rat mast cells from peritoneal washings were purified by centrifugation on a medium containing silica particles coated with PVP (Percoll). By isopycnic centrifugation on continuous Percoll gradients, the buoyant density of mast cells ranged from 1.09 to 1.17 and was consistently lower in mast cells from younger rats than in mast cells from older rats. In(More)
Mucosal mast cells of the gastrointestinal tract constitute a separate cell line within the mast cell system of the rat, differing in several respects from the classical connective tissue mast cells and, unlike the latter, requiring special fixation techniques for their demonstration. We have examined some histochemical properties of mucosal mast cells of(More)
The myenteric plexus of the guinea pig ileum was studied in stretch preparations of the longitudinal muscle layer with adherent plexuses, and in freeze-dried transverse sections from the small intestinal wall. Catecholamines and serotonin (5-HT) were visualized according to the Falck-Hillarp technique. Emission spectra from the resulting fluorophores and(More)