Cell Movements in Hydra
Cell Movements in Hydra
复制标题
九头蛇的细胞运动
DOI：
10.1093/icb/14.2.523
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发表时间：
1974
影响因子：
2.6
通讯作者：
R. D. Campbell
中科院分区：
文献类型：
--
作者：
R. D. Campbell
水龙体内的所有细胞都会在息肉体内进行连续和系统的运动。不同类型的细胞表现出不同的运动模式和运动机制。被动移位是细胞运动最明显的形式之一：由于组织的膨胀生长，体柱和触须上皮细胞以离心式运动。上皮细胞被动移位的另一个因素涉及形态特征在组织中的传播，而不是细胞或组织本身的实际运动。真正的细胞运动，即细胞通过自我推进相对于邻近组织移动，在某些情况下也明显地由上皮细胞表现出来，特别是在发生形态发生变化的部位(例如，芽和触须基地)。上皮细胞总是以片状细胞的形式迁移，而不是单独迁移。相反，线状细胞和间质细胞分别进行主动迁移。线粒细胞的迁移被强烈地极化，很可能是由它们沿着其移动的上皮细胞肌肉突起的垫子来实现的。间质细胞迁移似乎在许多情况下发生，但并不像经典假设的那样常见。最后，在某些情况下，间质细胞和成线虫细胞似乎在细胞间隙中大量移动。这种运动可能是由于上皮细胞的活动，并被用来重新分布位于间质中的细胞。
All cells in hydra undergo continuous and systematic locomotion across the polyp body. Different patterns and mechanisms of movement are exhibited by the various cell types. Passive displacement is one of the most conspicuous forms of cell movement: The epithelial cells of the body column and tentacles move centrifugally due to the expansive growth of the tissues. Another factor in the passive displacement of epithelial cells involves the propagation of morphological characters across the tissue, rather than actual movement of cells or tissues per se. True cell locomotion , where cells move relative to neighboring tissue by means of self-propulsion, is also apparently exhibited by epithelial cells in certain situations, notably at sites where morphogenetic changes are taking place (e.g., bud and tentacle bases). Epithelial cells always migrate as sheets of cells, never individually. In contrast, nematocytes and interstitial cells undergo active migration individually. Nematocyte migration is strongly polarized, very possibly by the mat of epithelial cell muscular processes along which they move. Interstitial cell migration appears to occur under many conditions, but not nearly as commonly as was classically supposed. Finally it appears that interstitial cells and nematoblasts move in bulk through the intercellular spaces in some situations. This movement is probably due to epithelial cell activities and is used to redistribute cells located in the interstitial spaces.