Fernández-Llebrez P, Becerra J, Marín-Girón F
J Comp Neurol. 1982 Jul 10;208(4):345-51. doi: 10.1002/cne.902080405.
Paraphyseal epithelial cells of Natrix maura have been studied with light and electron microscopy. They showed a clear polarity apically related to the third ventricle and, basally, to a connective tissue layer which surrounded the whole organ. The apical surface of the cells, attached by junctional complexes, showed many microvilli, scarce cilia, and some pinocytotic coated vesicles. In their apical cytoplasm many mitochondria and a well-developed golgi apparatus and endoplasmic reticulum were observed. Whereas lamellar bodies were abundant and closely related with mitochondria, glycogen particles were absent. Basal cell membrane showed infoldings where pinocytotic coated vesicles were detected. In the connective tissue layer, fenestrated sinusoids and fibrocytes, as well as rare unmyelinated nerve fibers engulfed by Schwann cells, were present. The possible active role of paraphyseal cells in exchanging substances between cerebrospinal fluid and blood is discussed.
已用光镜和电镜对水游蛇的旁室上皮细胞进行了研究。它们显示出明显的极性，顶端与第三脑室相关，基部与围绕整个器官的结缔组织层相关。通过连接复合体附着的细胞顶端表面有许多微绒毛、少量纤毛和一些有被小泡。在其顶端细胞质中观察到许多线粒体以及发育良好的高尔基体和内质网。板层小体丰富且与线粒体密切相关，糖原颗粒不存在。基底细胞膜有内褶，在那里检测到有被小泡。在结缔组织层中，有窗孔的血窦和纤维细胞，以及被施万细胞吞噬的罕见无髓神经纤维。讨论了旁室细胞在脑脊液和血液之间进行物质交换中可能的积极作用。
