水螅刺细胞清除的超微结构分析
Ultrastructural analysis of nematocyte removal in Hydra.
作者信息
Lyon M K, Kass-Simon G, Hufnagel L A
出版信息
Tissue Cell. 1982;14(3):415-24. doi: 10.1016/0040-8166(82)90036-2.
A consecutive series of ultrathin sections through the distal one-third of a Hydra tentacle has revealed at least four categories of nematocytes: (1) normal, mounted nematocytes, in specific arrangements within the battery cells; (2) degenerating nematocytes, within the battery cells; (3) mature nematocytes, enclosed within endodermal cells: (4) a mature nematocyte, in the enteric cavity. The degenerating nematocytes within the battery cells and the nematocytes in the endoderm and enteric cavity appeared to be aging nematocytes undergoing death and removal. The results provide the first ultrastructural evidence for nematocyte degeneration within battery cells and also suggest phagocytosis of mature nematocytes by endodermal cells.
对水螅触手远端三分之一处进行的一系列连续超薄切片显示，至少有四类刺细胞：(1) 正常的、已固定的刺细胞，在刺丝囊细胞内呈特定排列；(2) 正在退化的刺细胞，在刺丝囊细胞内；(3) 成熟的刺细胞，被包裹在内胚层细胞内；(4) 一个成熟的刺细胞，位于肠腔中。刺丝囊细胞内正在退化的刺细胞以及内胚层和肠腔中的刺细胞似乎是正在经历死亡和清除的衰老刺细胞。这些结果为刺丝囊细胞内刺细胞的退化提供了首个超微结构证据，也表明内胚层细胞对成熟刺细胞进行了吞噬作用。
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