Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10201/18304

Título: Effects of light deprivation on prolactin cells in golden hamsters: an immunoelectron microscopic study
Fecha de publicación: 1992
Editorial: Murcia : F. Hernández
ISSN: 0213-3911
Materias relacionadas: CDU::6 - Ciencias aplicadas::61 - Medicina::611 - Anatomía
Palabras clave: Prolactin cells
Pineal gland
Resumen: In the golden hamster light deprivation has been shown to induce gonadal regression and reduction of pituitary and plasma levels of prolactin (PRL). In the present study we examined changes in morphology and population ratios of three types of PRL cells 8 weeks after light deprivation, by means of blinding or exposure of hamsters to continuous darkness. In the pituitary of intact hamsters of either sex, which were entrained to a 14-h light: 10-h dark cycle, Type C cells with large secrtetory granules were the most numerous and Type A with smalier granules the least. After light deprivation the pituitary was found to contain remarkably atrophic PRL cells and showed a profound change in population ratio of PRL cell types, Le., Type A cells prevailed over the other two types. Pituitary glands from light-deprived and concurrently pinealectomized hamsters exhibited structures and a population ratio of three types of PRL cells similar to those from intact animals. It is suggested that small-granule-containing PRL cells represent an inactive stage of PRL cells, whereas medium- and large-granule-containing cells are functionally active cells. The atrophy of PRL cells can account for the decreased pituitary leve1 of PRL in light-deprived hamsters reported previously.
Autor/es principal/es: Seu-Mei Wang
Jiahn-Chun Wu
Chia-Man Lue
An-I Tsai
Wen-Ping Chen
Huai-San Lin
Publicado en: Histology and histopathology
URI: http://hdl.handle.net/10201/18304
Tipo de documento: info:eu-repo/semantics/article
Número páginas / Extensión: 7
Derechos: info:eu-repo/semantics/openAccess
Aparece en las colecciones:Vol. 7, nº 2 (1992)



Los ítems de Digitum están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.