Bartels H, Schewe H, Potter I C
Abteilung für Zellbiologie und Elektronenmikroskopie, Medizinische Hochschule Hannover, Germany.
Am J Physiol. 1993 Sep;265(3 Pt 1):C733-9. doi: 10.1152/ajpcell.1993.265.3.C733.
Freeze-fracture replicas demonstrate that the apical membrane of the chloride cells of young adult lampreys (Geotria australis) undergoes a structural change when the animal is acclimated from freshwater to seawater. Although the particles on both the P face and the E face of this membrane are randomly distributed in freshwater animals, they are usually arranged in clusters on both fracture faces in seawater-acclimated animals. Light optical diffraction analysis demonstrates that the particles forming the clusters are periodically arranged. Although comparable clusters of particles have not been recorded in other epithelial membranes that are engaged in transporting ions into a hypertonic environment, they may be involved in the final step of Cl- secretion by the chloride cells of lampreys in seawater.
冷冻蚀刻复型显示，当幼年成年七鳃鳗（澳洲短颈七鳃鳗）从淡水环境适应到海水环境时，其氯化物细胞的顶端膜会发生结构变化。在淡水环境中的动物体内，该膜的P面和E面上的颗粒都是随机分布的，但在适应海水环境的动物体内，这两个断裂面上的颗粒通常会聚集成簇。光学衍射分析表明，形成簇的颗粒呈周期性排列。尽管在其他将离子转运到高渗环境的上皮膜中尚未记录到类似的颗粒簇，但它们可能参与了海水环境中七鳃鳗氯化物细胞分泌氯离子的最后一步。
