Lamellae in the spindle of mitotic cells of Walker 256 carcinoma.

R C BUCK
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引用次数: 52

Abstract

In mitotic cells of Walker 256 carcinoma some four-layered lamellar structures were observed which had the appearance of paired cysternae of the ER. Two inner membranes were regular, smooth surfaced, and closely applied to each other. The two outer membranes were somewhat irregularly placed in relation to the inner pair; they showed attached RNP particles and connections with cysternae of the ER. The membranes often appeared to radiate from the region of the centrosphere towards the compact mass of chromosomes. Thus, they lay amid the spindle fibres and are referred to as "spindle lamellae." They approached the centrioles closely but were not observed to be continuous with them. They appeared to terminate in the pole of the spindle by joining smooth surfaced membranes in the centrosphere. Their equatorial termination was in relation to the chromosomes. At the surface of the chromosome mass they frequently split into two double membranes, which were closely applied to the chromosome substance. The most prominent and complicated membranes were seen in anaphase cells. An hypothesis is advanced which ascribes the development of the nuclear membrane to the spindle lamellae.

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Walker 256癌有丝分裂细胞纺锤体中的薄片。
Walker - 256癌有丝分裂细胞中可见四层板层结构,具有内质网成对囊状结构。两个内膜是规则的,表面光滑,彼此紧密地贴在一起。两个外膜相对于内膜的位置有些不规则;它们显示了附着的RNP颗粒和与ER的半胱氨酸的连接。膜通常表现为从中心球区向致密的染色体群辐射。因此,它们位于纺锤体纤维之间,被称为“纺锤体薄片”。它们接近中心粒,但没有观察到与中心粒连续。它们似乎在纺锤体的极点终止,通过在中心球中连接光滑表面的膜。它们的平伏终止与染色体有关。在染色体团块的表面,它们经常分裂成两层双层膜,这两层膜紧密地附着在染色体物质上。在后期细胞中可见最突出和复杂的膜。提出了一种将核膜的发育归因于纺锤片的假说。
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