Chicken Luteinizing Hormone-Releasing hormone-I and -II are located in distinct fiber terminals in the median eminence of the quail: a light and electron microscopic study

Using highly specific antibodies directed towards the avian luteinizing hormone-releasing hormones-I and -II (cLHRH-I and -II), we were able to show the presence of both peptides in the median eminence of the quail. In order to examine in more detail the morphological organization of both gonadotropin-releasing hormone systems in the median eminence, the present paper describes the results from a light and ultrastructural immunocytochemical double labeling study. These results demonstrate the presence of cLHRH-I and cLHRH-II in distinct fiber systems in the median eminence of the quail. Moreover, close associations between cLHRH-I or -II- immunoreactive neurons and glial cells were observed, suggesting glial-neuronal interactions.