Nowicki M, Przybylska-Gornowicz B
Division of Histology, Department of Functional Morphology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 13, 10-719 Olsztyn, Poland.
Pol J Vet Sci. 2006;9(2):87-99.
This study was conducted to investigate structural transformations of the goat pineal gland during postnatal development. The pineals of newborn, 4-week-, 4-month-, 1-year- and 3-year-old male goats were prepared for qualitative and quantitative investigations at both light and transmission electron microscopy levels. In the first 4 months after birth, the pinealocytes developed very intensively, which was connected with enlargement of their volume as well as distinct qualitative and quantitative transformations of their cytoplasmic organelles. Parallel to these changes, the pineal parenchyma underwent deep reorganization and the mosaic pattern, characteristic for newborns, disappeared. At the same time the meshwork of blood vessels supporting the goat pineal gland developed conspicuously. From fourth months to one year of postnatal life continuation of the growth of some pinealocyte organelles and very intensive development of all components of the pineal connective tissue were observed. In the three-year-old goats some decrease in the relative volume of most cytoplasmic structures of pinealocytes as well as increase in collagen fibers in stroma were noticed. The investigations established intensive growth of the goat pineal to the age of 4 months, which included mainly some increase in the pinealocyte and their structures. The pineal gland of 4-month- and 1-year-old goats showed morphological features which are considered as symptoms of high secretory activity. The structure of the pineal gland in 3-year-old animals and the changes observed both in their pinealocytes and connective tissue in comparison with 1-year-old individuals point to some decrease in the goat pineal activity in this age.
本研究旨在调查山羊松果体在出生后发育过程中的结构变化。对新生、4周龄、4月龄、1岁和3岁雄性山羊的松果体进行了准备，以便在光学显微镜和透射电子显微镜水平上进行定性和定量研究。在出生后的前4个月，松果体细胞发育非常旺盛，这与它们体积的增大以及细胞质细胞器在质和量上的明显变化有关。与这些变化同时发生的是，松果体实质经历了深度重组，新生儿特有的镶嵌模式消失。与此同时，支持山羊松果体的血管网络显著发育。从出生后4个月到1岁，观察到一些松果体细胞器继续生长，松果体结缔组织的所有成分都非常旺盛地发育。在3岁的山羊中，注意到松果体细胞大多数细胞质结构的相对体积有所减少，以及基质中胶原纤维增加。研究确定山羊松果体在4个月龄前生长旺盛，主要包括松果体细胞及其结构的一些增加。4月龄和1岁山羊的松果体表现出被认为是高分泌活动症状的形态特征。与1岁个体相比，3岁动物松果体的结构以及在其松果体细胞和结缔组织中观察到的变化表明该年龄山羊松果体活动有所下降。
