作　　者： ; ; ; ; ;

机构地区： 华南农业大学兽医学院

出　　处： 《畜牧兽医学报》 2003年第5期468-470,共3页

摘　　要： 透射电镜观察表明,比格犬(Beagle)脑垂体远侧部实质中含有6种细胞,即生长激素细胞、催乳激素细胞、促甲状腺激素细胞、促性腺激素细胞、促肾上腺皮质激素细胞和滤泡—星形细胞,它们各有其超微结构特征。生长激素细胞呈圆形;胞核为圆形;分泌颗粒很多,圆形,直径约233～465nm。催乳激素细胞多呈不规则形;胞核为不规则形;分泌颗粒很多,圆形,直径约310～620nm。促甲状腺激素细胞呈圆形或卵圆形;胞核为圆形或卵圆形;分泌颗粒较少,直径约78～232nm。促肾上腺皮质激素细胞呈圆形或卵圆形;胞核为圆形或卵圆形;分泌颗粒较多,圆形,直径约155～310nm,分布于细胞周边。促性腺激素细胞呈圆形或椭圆形;胞核为圆形或椭圆形;分泌颗粒较少,呈圆形、卵圆形、杵状或不规则形,长径约155～434nm。滤泡一星形细胞呈星形或不规则形,有突起伸入相邻细胞之间;胞核为圆形或卵圆形;胞质内无分泌颗粒。 Under transmission electron microscope,the adenohypophysis pars distalis of Beagle dog have six cells types in common,i.e. somatotrophs,lactotrophs,thyrotrophs,adenocorticotrophs,gonadotrophs and folliculostellate cells.Their ultrastructural features appeared characteristically.Somatotrophs are round in shape,contain rounded nuclei,numerous secretory granules which are about 233～465 nm in diameter.Lactotrophs are mostly irregular in shape,contain irregular nuclei,numerous secretory granules which are about 310～620 nm in diameter.Thyrotrophs are round or ovoid in shape,contain rounded or ovoid nuclei,a few secretory granules which are about 78～232 nm in diameter.Adenocorticotrophs are round or ovoid in shape,contain rounded or ovoid nuclei,many secretory granules which are occurred in cytoplasmic periphery and about 155～310 nm in diameter.Gonadotrophs are round or ellipse in shape,contain rounded or elliptic nuclei,a few secretory granules which are round,ovoid,rod or irregularshape and about 155～434 nm in length.Folliculostellate cells are stellate or irregular in shape,contain rounded or ovoid nuclei,have some processes extended adjacent cells,without secretory granules in their cytoplasm.

关 键 词： 比格犬 脑垂体 侧部细胞 电镜观察 生长激素细胞 催乳激素细胞 促甲状腺激素 促性腺激素

领　　域： [农业科学] [农业科学]