Cerebrospinal fluid-contacting area of the deep pineal: effects of photoperiod.
Cerebrospinal fluid-contacting area of the deep pineal: effects of photoperiod.
复制标题
松果体深部的脑脊液接触区：光周期的影响。
DOI：
10.1111/j.1600-079x.1989.tb00912.x
复制
发表时间：
1989
影响因子：
10.3
通讯作者：
Rollag,MD
中科院分区：
文献类型：
--
作者：
Welsh,MG;Sheridan,MN;Rollag,MD
叙利亚仓鼠的松果体隐窝的表面表现出三个形态上不同的区域，被分类为外围，过渡和中央区。中央区是最显着的，因为在这个地区，似乎表明脑脊液（CSF）和相关的脑室结构和深松果体之间的相互作用的可区分的形态专业化的数量。接触CSF的松果体细胞存在于中央区，除了存在表面泡和在深层松果体表面上行进的松果体细胞突起外，具有相对模糊的脑室表面。室管膜上神经元和神经元突起似乎会聚在中央区，偶尔具有与中央区细胞相关的假定终末。当仓鼠保持在短光照周期（LD 8：16）时，与开灯前2小时处死的仓鼠相比，关灯前2小时处死的仓鼠松果体隐窝的CSF接触面积显著更大（P < 0.01）。当比较两组保持在长光周期（LD 14：10，分别在开灯和关灯前2小时处死）的仓鼠时，CSF接触面积无显著差异。光照周期和死亡当天的时间对接触CSF的松果体细胞的外观有统计学显著的相互作用（P < 0.05）。与维持在LD 14：10的仓鼠相比，维持在LD 8：16的仓鼠睾丸重量显著降低。仓鼠松果体隐窝中央区和相关CSF接触松果体细胞的可塑性证明，该区域表现出依赖于动物生理状态的形态学变化。
The surface of the pineal recess of the Syrian hamster demonstrates three morphologically distinct zones that are classified as the peripheral, transitional, and central zones. The central zone is the most remarkable because of the number of distinguishable morphological specializations in this region that appear to indicate interaction between the cerebrospinal fluid (CSF) and associated ventricular structures and the deep pineal gland. CSF‐contacting pinealocytes are present in the central zone and have a relatively indistinct ventricular surface except for the presence of surface blebs and pinealocyte processes that course on the surface of the deep pineal. Supraependy‐mal neurons and neuronal processes appear to converge on the central zone, occasionally having presumptive terminals that are associated with the cells of the central zone. When the hamsters were maintained in a short photoperiod (LD 8: 16), the CSF‐contacting area of the pineal recess was significantly larger in those hamsters killed 2 hours before lights off compared to those killed 2 hours before lights on (P < 0.01). There were no significant differences in the CSF‐contacting area when comparing two groups of hamsters maintained in a long photoperiod (LD 14: 10, killed 2 hours before lights on and lights off, respectively). There was statistically significant interaction (P < 0.05) between the lighting cycle and the time of day of death on the appearance of CSF‐contacting pinealocytes. The hamsters maintained in LD 8: 16 had significantly reduced testicular weights when compared to those maintained in LD 14: 10. The plasticity of the central zone and the associated CSF‐contacting pinealocytes of the pineal recess of the hamster are evidence that this region demonstrates morphological changes that are dependent upon the physiological state of the animal.