Karasek M, Hurlbut E C, Hansen J T, Reiter R J
Cell Tissue Res. 1982;226(1):167-75. doi: 10.1007/BF00217091.
The ultrastructure of the pinealocytes of the wild-captured ord kangaroo rat (Dipodomys ordi) was examined. A homogeneous population of pinealocytes was present in the pineal gland of the kangaroo rat. The Golgi apparatus, granular endoplasmic reticulum, mitochondria, lysosomes, dense-core vesicles, vacuoles containing a flocculent material and lipid droplets were consistent components of the pinealocyte cytoplasm, whereas infrequently-observed organelles included centrioles, multivesicular bodies, subsurface cisternae, "synaptic" ribbons and cilia. The number of dense-core vesicles was relatively high and dense-core vesicles and vacuoles containing a flocculent material were present in the same cell. Although it has been recently suggested that two different secretory processes, i.e., neurosecretory-like (Golgi apparatus - dense-core vesicles) and ependymal-like (granular endoplasmic reticulum - vacuoles containing a flocculent material) may be involved in different regulatory mechanisms in the pinealocytes, the definitive answer to this is still far from clear. Therefore, the pineal gland of the kangaroo rat appears to be a good model for the study of the potential relationship between these two secretory processes, especially in respect to seasonal changes.
对野生捕获的奥德更格卢鼠（Dipodomys ordi）松果体细胞的超微结构进行了检查。在更格卢鼠的松果体中存在同质的松果体细胞群。高尔基体、颗粒内质网、线粒体、溶酶体、致密核心小泡、含有絮状物质的液泡和脂滴是松果体细胞细胞质的常见组成部分，而很少观察到的细胞器包括中心粒、多囊泡体、表面下池、“突触”带和纤毛。致密核心小泡的数量相对较高，并且在同一细胞中存在致密核心小泡和含有絮状物质的液泡。尽管最近有人提出，两种不同的分泌过程，即神经分泌样（高尔基体 - 致密核心小泡）和室管膜样（颗粒内质网 - 含有絮状物质的液泡）可能参与松果体细胞的不同调节机制，但对此的明确答案仍远不清楚。因此，更格卢鼠的松果体似乎是研究这两种分泌过程之间潜在关系的良好模型，特别是在季节变化方面。
