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KMID : 0376319940060010081
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Dental Journal of CNU
1994 Volume.6 No. 1 p.81 ~ p.132
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A Study on the Mast Cells in the Rat Vallate Papilla
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Abstract
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The present study evaluated the distribution. Histochemical characteristics and morphology of mast cells in the rat vallate papilla using light and electron microscope.
Mast Cells were especially numerous within the connective tissue(lamina propria) of the vallate papilla and many mast cells were seen near the nerve fibers. According to staining properties in alcian blue/safranin stain. Mast cells in the vallate
papilla were classified into 3 types : B (blue, mucosal mast cell-like) cells, R (red, connective tissue mast cell-like) cells and I (red-blue, intermediate) cells. In the lower lamina propria of the vallate papilla, mast cells were chiefly R
cells(72.2%) and only 3.5% of mast cells were B cells. But in the upper lamina propria of the vallate papilla. B cells(20.7%) and I cells(46.2%) as well as R cells(33.1%) were found.
In electron-microscopic observation. Most mast cells in vallate papilla exhibited the characteristics of the connective tissue mast cell but some mast cells were different from the connective tissue mast cell in the cellular form and the electron
density of the granules.
These results indicate that numerous mast cells are located in the rat vallate papilla-in which many nerve fibers were distributed-compared with the circumferential area of vallate papilla and mast cells in this papilla showed heterogeneity
histochemically and electron-microscopically.
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