硬骨魚類の副腎系に関する研究-1-

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As the first step in the studies of the adrenal bodies in teleosts, histological observations were made on the head kidneys and the Stannius bodies of some fishes (Carassius auratus, Parasilurus asotus and Hexagrammos otakii). The head kidney consists of lymphoid tissue containing histiocytes and blood cells of every kind. The acidophil cells surrounding the cardinal veins and their branches in the lymphoid head kidneys attract considerable attention. They are deeply stained with plasma stains. The groups of these cells were believed by some authors (BAECKER and GIACOHINI) to be homologous to the adrenal cortex of mammals. The existence of the chromaffin cells in the head kidney is affirmed by the chromaffin reaction. They have a close relationship with acidophil cells in the locality. The groups of the chromaffin cells are homologous to the adrenal medullary tissue of higher vertebrates. In all three species of fishes investigated, the Stannius bodies are present, and are described by some writers (DIAMARE and VINCENT) as homologous to the adrenal cortex of mammals. Stannius bodies are composed of alveoli of various sizes, surrounded with the fibrous capsule, and resemble the interrenal bodies of elasmobranchs in histological structure. The above mentioned acidophil cells and the parenchyme cells of the Stannius bodies are both free from lipoid droplets. It is observed that the cells of Stannius bodies are filled with siderophil granules, when they are fixed with Zenker-Formol solution and stained with Heidenhain's iron haematoxylin. In view of the observations described above, there are remarkable differences between the acidophil cells in the head kidneys and the cells of the Stannius bodies, and also the two types of cells are both quite different from the cortical cells of mammals. However, it is not obvious what organs of teleosts correspond to the adrenal cortex of higher vertebrates. Further investigations on this problem are being carried out.

硬骨魚類の副腎系に関する研究-1-

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