CHARACTERIZATION OF PUTATIVE SECRETORY SITES ON AMELOBLASTS OF THE RAT INCISOR
CHARACTERIZATION OF PUTATIVE SECRETORY SITES ON AMELOBLASTS OF THE RAT INCISOR
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DOI：
10.1002/aja.1001710204
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发表时间：
1984-01-01
影响因子：
--
通讯作者：
WARSHAWSKY, H
中科院分区：
文献类型：
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作者：
NANCI, A;WARSHAWSKY, H
通过将外部形貌与Tomes突中细胞器的分布相关联，研究了成釉细胞分泌釉基质的假定位点的分布和结构。杆间和杆分泌位点都与深层膜内折叠有关。棒间分泌位点完全包围每个成釉细胞;相邻细胞的显著交错导致棒间釉质的合作生长前沿。与此相反，杆状物分泌部位仅存在于Tomes突的交错部分的一个表面上。在与两个位点相关的膜内折叠附近观察到许多颗粒，并且看到颗粒与膜内折叠融合，这表明釉质基质是局部分泌的分泌产物。
The distribution and structure of the putative sites where enamel matrix is secreted from the ameloblast were studied by correlating the external topography with the distribution of organelles in Tomes'' process cut in various planes of section. Both the interrod and rod secretion sites are associated with deep membrane infoldings. The interrod secretion site completely surrounds each ameloblast; the marked interdigitation of adjacent cells results in a cooperative growth front for interrod enamel. In contrast, the rod secretion site is present on only one surface of the interdigitating portion of Tomes'' process. Numerous granules were observed adjacent to the membrane infoldings associated with both sites, and granules were seen fused to membrane infoldings, suggesting that the matrix of enamel is a merocrine secretion product.