Matrinxã, Brycon cephalus Gunther 1869 (Teleostei‐characters)肾间腺和嗜铬细胞的结构和超微结构特征

R. Rocha, H. S. Leme‐Dos Santos, C. A. Vicentini, C. da Cruz
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引用次数: 21

摘要

本文介绍了头蟾肾间腺和嗜铬细胞的结构和超微结构,以及头肾的形态。头肾由位于鱼鳔前部和脊柱腹外侧的融合双叶组成。实质显示淋巴-造血组织、黑素-巨噬细胞中心、肾间腺和嗜铬细胞。肾间腺由排列在后主静脉及其分支周围的细胞束或细胞束组成。嗜铬细胞呈小群分布,与肾间腺和/或后主静脉内皮密切相关。到目前为止,超微结构分析只发现了一种肾间细胞类型,它含有丰富的光滑内质网和大量具有小管泡嵴的线粒体,这是类固醇细胞的特征。观察到两种类型的嗜铬细胞。第一种类型的特征是存在带有圆形、强电子密度颗粒的囊泡,这些颗粒位于偏心位置。这些细胞被解释为去甲肾上腺素细胞。同时,含有更小的囊泡和电子发光颗粒的细胞被鉴定为肾上腺素细胞,这些颗粒与囊泡限制膜之间有一个小光环。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structural and Ultrastructural Characteristics of Interrenal Gland and Chromaffin Cell of Matrinxã, Brycon cephalus Gunther 1869 (Teleostei‐Characidae)
This work presents the structure and ultrastructure of the interrenal gland and chromaffin cells, as well as the morphology of the head kidney of Brycon cephalus. The head kidney is composed of fused bilateral lobes located anterior to the swim bladder and ventrolateral to the spinal column. The parenchyma revealed lympho‐haematopoietic tissue, melano‐macrophage centres, interrenal gland and chromaffin cells. The interrenal gland consisted of cords or strands of cells grouped around the posterior cardinal vein and their branches. Chromaffin cells are found in small groups, closely associated with the interrenal gland and/or under the endothelium of the posterior cardinal vein. So far, the ultrastructural analysis has revealed only one interrenal cell type which contained abundant smooth endoplasmic reticulum and numerous mitochondria with tubulo‐vesicular cristae, characteristic of steroid‐producing cells. Two types of chromaffin cells were observed. The first type was characterized by the presence of vesicles with round, strongly electron‐dense granules, which were eccentrically located. Such cells were interpreted as noradrenaline cells. Meanwhile, cells which contained smaller vesicles and electron‐lucent granules, with a small halo separating the granule from the vesicular limiting membrane, were identified as adrenaline cells.
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