Olsson R, Fujita H
Cell Tissue Res. 1976 Sep 14;172(2):185-94. doi: 10.1007/BF00226026.
The elopiform teleost Engraulis japonica was used for a light and electron microscopical study of the follicle epithelium in the rostral pars distalis of the pituitary. In this species, which has one large follicle in the anterior hypophysis, there is no persistent orohypophysial duct in postmetamorphic stages. The apical pole of the prolactin cells is almost completely overlaid by a surface layer of flattened epithelial cells with a thick glycocalyx. The prolactin cells reach the follicular lumen through "pores" in this cell layer and at the site of the pore the prolactin cells bear unusual specializations consisting of one cilium, several tall microvilli, and a mass of granular material. Prolactin release takes place at the basal pole of the cells.
将日本鳀这种鲱形目硬骨鱼用于对垂体吻部远侧部的滤泡上皮进行光镜和电镜研究。在这种前叶垂体中有一个大滤泡的物种中，变态后期不存在持续的口垂体管。催乳素细胞的顶端几乎完全被一层具有厚糖萼的扁平上皮细胞表面层覆盖。催乳素细胞通过该细胞层中的“孔”到达滤泡腔，在孔的部位，催乳素细胞具有由一根纤毛、几根高微绒毛和一团颗粒物质组成的异常特化结构。催乳素在细胞的基底部释放。
