Cytochemical variation of mast cells in the skin of the rat
- 1 January 1977
- journal article
- research article
- Published by Springer Nature in Archives of Dermatological Research
- Vol. 258 (1) , 69-80
- https://doi.org/10.1007/bf00582869
Abstract
The mast cells of the skin of the external ear of the rat have been examined, with a view to the possible identification of different cell-types. It was not possible to discern more than one type of cell using criteria of size, shape, nuclear chromophilia or sizes of granules. The cytoplasmic granules of all of the cutaneous mast cells were tingible with Alcian blue (pH. 1.0 and 2.5) and, metachromatically, with toluidine blue 0. These properties were attributable to the heparin contained in the granules. The cells all gave positive reactions with the diazosafranine method, possibly by virtue of their content of serotonin. About two thirds of the mast cells in the dermis contained granules which were stainable by the periodic acid-Schiff (PAS) method and which could bind concanavalin A. It is suggested that these latter cells contain, in addition to heparin, a neutral mucosubstance characterized by a high content of α-D-glucosyl and/or α-D-mannosyl monosaccharide residues. The PAS-positive cells were relatively more abundant in vascular adventitiae and nerves and less so in the general connective tissue of the dermis than were the mast cells which did not contain the second mucosubstance. Die Mastzellen der Ohraußenhaut von Ratten wurden im Hinblick auf verschiedene Typen der Mastzellen untersucht. Unter Beachtung der Form der nuklearen Chromophilie und der Größe der Granula, konnte nur ein Zelltyp aufgefunden werden. Die cytoplasmatische Granula aller cutanen Mastzellen waren mit Alcianblau (pH 1,0 und 2,0) und mit Toluidinblau färbbar. Diese Eigenschaften wurden auf den Heparingehalt der Granula bezogen. Alle Zellen reagierten positiv auf die Färbung mit Diazosafranin, wobei der Serotoningehalt möglicherweise verantwortlich ist. Etwa 2/3 der Mastzellen enthielten Granula, die mit der PAS-Methode färbbar waren und welche Concanavalin A binden konnten. Es wird angenommen, daß diese Zellen neben Heparin eine neuere Mucosubstanz enthielten, die durch einen hohen Gehalt an α-D-glucosyl und/oder α-D-mannosyl Monosaccharidkörper charakterisiert ist. Die PAS-positiven Zellen waren im Bereiche der Adventitia der Gefäße und Nerven häufiger vorhanden und weniger im übrigen Bindegewebe der Haut, wo die Mastzellen die charakteristischen Mucosubstanzen nicht aufwiesen.This publication has 40 references indexed in Scilit:
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