牛鼻表皮角质细胞增厚的细胞包膜。

Thickened cellular envelope of the horny cells in cow snout epidermis.

作者信息

Tezuka T

出版信息

Tohoku J Exp Med. 1975 May;116(1):45-52. doi: 10.1620/tjem.116.45.

DOI:10.1620/tjem.116.45

Abstract

The cow snout epidermis consists of two different parts. The one has the granular cell layers, and the other not. Electron-microscopically, the generation of the lamellated granules and the thickened cellular envelope of a horny cell were noted in both regions. In the horny cell layer the remnant of the lamellated granules were observed locating in the intercellular space, that is, outside of the thickened cellular envelope. The thickened cellular envelope was generated by the precipitation of electron dense material along the inner leaflet of the plasma membrane, but neither by the attachment of small keratohyalin granules to the plasma membrane nor by the coating of the plasma membrane with the content of lamellated granules.

摘要

牛鼻表皮由两个不同部分组成。一部分有颗粒细胞层，另一部分没有。在电子显微镜下，在这两个区域均观察到板层颗粒的生成以及角质形成细胞增厚的细胞包膜。在角质形成细胞层中，观察到板层颗粒的残余物位于细胞间隙中，即在增厚的细胞包膜之外。增厚的细胞包膜是由电子致密物质沿质膜内小叶沉淀形成的，而不是由小的透明角质颗粒附着于质膜或质膜被板层颗粒的内容物覆盖形成的。