鹅胸腺肥大细胞的超微结构特征

Ultrastructural Features of Mast Cells in the Thymus of Goose

应用透射电镜观察表明，鹅胸腺实质内存在大量的肥大细胞，它们主要分布于胸腺髓质；胞体圆形或椭圆形，表面有少许突起；胞核圆形、椭圆形或新月形，核仁明显；胞质内含有丰富的细胞器和大量的膜包分泌颗粒，颗粒多呈圆形，大小不一根据其超微结构特征，可将颗粒分为４型：Ａ型颗粒内含细颗粒状物质；Ｂ型颗粒内含粗颗粒状物质；Ｃ型颗粒内含同心性念珠链状物质；Ｄ型颗粒为均质状高电子密度颗粒内部均未见结晶状。

In this study, large numbers of mast cells were found in the thymus of goose under transmission electron microscope. They were located mainly in the medulla of the thymus, were round or ellipsoid in shape, had a few cytoplasmic processes, and possessed a rounded, elliptic, or crescent shaped nucleus with distinct nucleoli. Their cytoplasm contained abundant organelles and numerous membrane bound secretory granules that were mostly round in shape and varied in size. According to the ultrastructural features, these granules were classified into 4 types: type 1 granules contained electron dense fine granular material; type 2 granules contained electron dense coarse granular material; type 3 granules contained electron dense concentric beaded chains; type 4 granules showed almost homogeneous high electron density. No crystalline, scrolled or lamellar structures were evident in the granules.