Matsumoto E, Rosenbluth J
Anat Rec. 1986 Jun;215(2):182-91. doi: 10.1002/ar.1092150211.
The structure of the satellite cell sheath of frog dorsal root ganglion cells was studied in thin sections and freeze-fracture replicas. The sheath around the cell body is composed of thin satellite cell lamellae closely applied to the neuronal plasma membrane. At the axon hillock the sheath divides into outer and inner components separated by a broad space containing a distinctive extracellular matrix and occasional flattened satellite cell processes. The sheath around the initial segment is usually multilayered but less compact than that around the cell body, and in some places it exhibits node-like interruptions. Apart from occasional particle groupings characteristic of tight junctions and gap junctions, the satellite cells display homogeneously distributed intramembranous particles in both fracture faces in all regions of the sheath.
利用超薄切片和冷冻蚀刻复型技术研究了蛙背根神经节细胞卫星细胞鞘的结构。细胞体周围的鞘由紧密贴附于神经元质膜的薄卫星细胞片层组成。在轴丘处，鞘分为外层和内层，两者之间有一个宽阔的间隙，其中含有独特的细胞外基质和偶尔出现的扁平卫星细胞突起。起始段周围的鞘通常是多层的，但不如细胞体周围的鞘紧密，并且在某些部位呈现出节状中断。除了偶尔出现的紧密连接和缝隙连接特有的颗粒聚集外，卫星细胞在鞘的所有区域的两个断裂面上均显示出均匀分布的膜内颗粒。
