Maddrell S H, Overton J A
J Embryol Exp Morphol. 1985 Dec;90:409-14.
We have found in an insect tissue, the Malpighian tubules of Rhodnius, instances of single epithelial cells which, as the result of a possible error in development, lie within the epithelium some distance from the main population of similar cells. This spatial separation makes it possible to measure the transport abilities of these cells. Their transport abilities were found to be the same as the cells in the main population. This finding shows that the maintenance of function in individual cells of epithelial tissues may not depend on direct contact with other similar cells.
我们在一种昆虫组织——红蝽的马尔皮基氏小管中发现,存在单个上皮细胞的情况,由于发育过程中可能出现的误差,这些细胞位于上皮组织内,与主要的同类细胞群体有一定距离。这种空间上的分离使得测量这些细胞的转运能力成为可能。结果发现它们的转运能力与主要群体中的细胞相同。这一发现表明,上皮组织中单个细胞功能的维持可能不依赖于与其他相似细胞的直接接触。