Fernández-Llebrez P, Pérez-Fígares J M, Becerra J, Pérez J, Marín-Girón F
Cell Tissue Res. 1984;238(2):407-9. doi: 10.1007/BF00217314.
Two different types of ependymal cells were found in the subcommissural organ (SCO) of Natrix maura. Most secretory cells showed morphological features resembling the general structure and ultrastructure of cells in the SCO of other vertebrates. This report describes a second population of cells lining a portion of the dorsal groove of the SCO. These cells were not selectively stained by chromalum-hematoxylin and, under the electron microscope, they were characterized by scarce surface differentiations, sparse apical cytoplasm and short basal processes. Flat, parallel cisternae of the rough endoplasmic reticulum produced vesicles that appeared to be transported to the well-developed Golgi apparatus. Dense secretory granules about 200 nm in diameter were found in the Golgi region. Similar granules were seen in the vicinity of the apical plasma membrane; some of them opened toward the ventricle. All these characteristics clearly differentiate this cell group from the other secretory cells lining the SCO laterally and ventrally.
在南欧水蛇的连合下器官（SCO）中发现了两种不同类型的室管膜细胞。大多数分泌细胞呈现出的形态特征类似于其他脊椎动物SCO中细胞的一般结构和超微结构。本报告描述了另一群排列在SCO背侧沟一部分的细胞。这些细胞不能被铬苏木精选择性染色，在电子显微镜下，它们的特征是表面分化稀少、顶端细胞质稀疏且基部突起短。粗糙内质网的扁平、平行池产生小泡，这些小泡似乎被运输到发达的高尔基体。在高尔基体区域发现了直径约200纳米的致密分泌颗粒。在顶端质膜附近也可见类似的颗粒；其中一些颗粒向脑室开放。所有这些特征清楚地将这个细胞群与横向和腹侧排列在SCO的其他分泌细胞区分开来。
