Bertossi M, Ribatti D
Boll Soc Ital Biol Sper. 1983 Jun 30;59(6):723-9.
The ultrastructure of the blood capillaries has been analyzed in the adenohypophysis, the pineal body, the thyroid and the suprarenal gland of chick embryos of 7, 14 and 19 days of incubation and, respectively, of the adult fowl. During the organogenesis of these endocrine glands the vascular primordia, precociously appearing among the epithelial components, undergo morphological maturative changes leading to the formation of capillaries built of a fenestrated endothelium and an underlying thin layer of pericytes included in a splitting of the endothelial basement lamina. The capillary differentiation processes, almost identical in the mentioned glands, follow a different chronological sequence, occurring precociously in thyroid and suprarenal and later on in adenohypophysis and pineal body. The relationships between the structural modifications of the capillary wall and the morphological and functional differentiation of the endocrine cells during the organogenesis of the glands have been briefly discussed.
对孵化7天、14天和19天的鸡胚以及成年家禽的腺垂体、松果体、甲状腺和肾上腺中的毛细血管超微结构进行了分析。在这些内分泌腺的器官发生过程中，血管原基早熟地出现在上皮成分之间，经历形态学成熟变化，导致形成由有窗孔的内皮和包含在内皮基底膜分裂中的下层薄周细胞层构成的毛细血管。上述腺体中几乎相同的毛细血管分化过程遵循不同的时间顺序，在甲状腺和肾上腺中早熟发生，随后在腺垂体和松果体中发生。本文简要讨论了腺体器官发生过程中毛细血管壁的结构改变与内分泌细胞的形态和功能分化之间的关系。
