Interrenal tissue, chromaffin cells and corpuscles of Stannius of Nile tilapia (Oreochromis niloticus)
- PMID: 30805608
- DOI: 10.1093/jmicro/dfy146
Interrenal tissue, chromaffin cells and corpuscles of Stannius of Nile tilapia (Oreochromis niloticus)
Abstract
Twenty-three fishes were used to study the structure and ultrastructure of interrenal tissue, chromaffin cells and corpuscles of Stannius of Nile tilapia. The interrenal tissue and chromaffin cells are present within the head kidney. The interrenal tissue is arranged in the form of highly convoluted cords, bordered by the lining endothelium of the adjacent sinusoids. It has no connective tissue capsule. The cytoplasm of the interrenal cells contains abundance of mitochondria, vacuoles and smooth endoplasmic reticulum, characterizing of steroid-producing tissues. Two types of chromaffin cells; noradrenaline (NA) cells and adrenaline cells (A) could be recognized by light microscope using chromaffin reaction, as well as by electron microscope they could be distinguished depending on the size and electron density of their granules. The corpuscles of Stannius are two in number and located on the dorsal aspect of the tail kidney. Each corpuscle is surrounded by thick connective tissue capsule. The parenchyma is divided into lobules, each of which is surrounded by distinct basal lamina and has a pseudo lumen. Depending on the presence of secretory granules and the relative abundance of cell organelles, three cell types could be recognized; granular cell, agranular cell (Type I) and agranular cell (Type II). In conclusion, the morphological and ultrastructural analysis of the endocrine tissues of the kidney of Nile tilapia has revealed only one type of interrenal cells, two types of chromaffin cells and three staged-cells of Stannius corpuscles.
Keywords: Nile tilapia; chromaffin cells; corpuscles of stannius; interrenal tissue; light and electron microscopy.
© The Author(s) 2019. Published by Oxford University Press on behalf of The Japanese Society of Microscopy. All rights reserved. For permissions, please e-mail: [email protected].
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