三种鲤科鱼类肠道内分泌细胞的初探

使用Grimelius嗜银染色法对草鱼，鲤，翘嘴红鳇3种不同食性的鲤科鱼的肠道内分泌细胞进行了研究，在3种鱼的整个肠道上均发现有内分泌细胞的分布。在前肠前段中，内分泌细胞分布最多，愈向后分布愈少，在肠褶各处均有内分泌细胞分布，以基部分布最密，内分泌细胞几乎都为开放型，位于上皮细胞和杯状细胞之间，将胞突伸向肠腔，有极少数内分泌细胞兼有开放型和封闭型细胞的特点，在它们顶端胞突伸向腔的同时，基部也伸出突起将分泌物送入邻近细胞或细胞间隙中，肠上皮中还发现一种与内分泌细胞具有同样嗜银特性的圆形颗粒。

PRELIMINARY STUDY ON ENDOCRINE CELLS IN THE GUT OF THREE CYPRINID FISHES

By using the Grimelius argyrophil staining method, an investigation was made into the endocrine cells in the gut of three cyprinids with different feeding habits, grass carp (Ctenopharyngodon idellus), common carp (Cyprinus carpio) and whitefish (Erythroculter ilishaeformis). Endocrine cells are detected throughout the gut of all three species. The number of endocrine cells is most in the anterior segment of the foregut, and decreases towards the posterior end. Endocrine cells are seldom found in the rectum of C. carpio and E. ilishaeformis. But in C. idellus, the number of endocrine cells is slightly larger in the rectum than in the anterior segment of the hindgut. Endocrine cells are distributed in every part of the gut folds and are most abundant at the base of the folds. Most endocrine cells seem to be of the open type. They lie between the intestinal epithelial cells and goblet cells, and their cytoplasmic processes extend to the lumen of gut. Only a small number of endocrine cells have the feature of both open and close types; the basilar cytoplasmic process extends to the adjacent cells or intercellular space while the apical cytoplasmic process extends to the lumen of gut. In the intestinal epithelium, there is a group of round granules that show similar argyrophil staining characteristics as the enteroendocrine cells.