RELATIONSHIP BETWEEN THE POSTERIOR PITUITARY PROJECTING VASOPRESSIN-LIKE IMMUNOREACTIVE NEURONS AND THE EPENDYMA OF THE THIRD VENT-RICLE AND THE PIAMATER IN THE RAT
- VernacularTitle:大鼠投射到垂体后叶的加压素样免疫反应神经元与第三脑室室管膜及软脑膜的关系
- Author:
Hong YANG
;
Gong JU
- Publication Type:Journal Article
- Keywords:
Vasopressin;
Periventricular area;
Posterior pituitary;
HRP technique;
Immunohistochemistry;
Rat
- From:
Acta Anatomica Sinica
1953;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
By combining WGA-HRP retrograde tracing and immunohistochemical methods,the characteristics of the vasopressin(VP)-like immunoreactive neurons, which project to the posterior pituitary were studied. They were located subependymally, and predominately along:(1) the dorsal wall of the third ventricle at the preoptic area and posterior magnocellular paraventricular nucleus levels, (2) the ventral wall of the third ventricle at the suprachiasmatic nucleus level, and (3) at the floor of the third ventricle. Four types of the cells could be distinguished. They were found to squeeze in between the ependymal cells, bring themselves very close to the cerebrospinal fluid (CSF),or to be situated in the subependymal layer, sending some of their processes into the ependyma. The double labelled neurons were also detected subpially in the supraoptic nucleus (SON) and the retrochiasmatic nucleus. A large number of dendrites from the neurons in the SON extended toward the CSF in the subarachnoidspace. In summary, the VP-like immunoreactive neurons which projected to the posterior pituitary were very close to the CSF. It is, therefore, proposed that these neurons may monitor changes in the CSF and adjust the secretion of VP in the posterior pituitary. They may also release VP directly into the CSF.
