Ultrastructure of the ovarian medulla in the newly hatched chick treated with human chorionic gonadotropin
Por:
del Pliego M.G., González-Morán G., Pedernera E.
Publicada:
1 ene 1988
Resumen:
The ultrastructural characteristics of the ovarian medulla of the newly hatched white leghorn chick were studied in control animals and compared with chicks that were treated with human chorionic gonadotropin during embryonic development. The ovarian medulla was mainly occupied by epithelial cells which formed cords or islets surrounded by a basal lamina. Within this epithelial compartment, steroidogenic cells, poorly differentiated cells and a lacunary system could be recognized. When chicks were treated with human chorionic gonadotropin, steroidogenic cells became discernible; there was an increment in the amount of cytoplasm and the area of mitochondria. Poorly differentiated cells exhibited signs of stimulation, and transitional images suggested the transformation of these cells into steroidogenic cells. The epithelial cells of the lacunar system also displayed stimulated cytoplasmic organelles. Evidence was supplied suggesting that relatively undifferentiated cells persist in the ovarian medulla until hatching and can develop into steroidogenic cells under gonadotropic stimulation. © 1988 Springer-Verlag.
Filiaciones:
del Pliego M.G.:
Departamento de Embriología, Facultad de Medicina, Universidad Nacional Autónoma de México, México, DF, Mexico
González-Morán G.:
Departamento de Embriología, Facultad de Medicina, Universidad Nacional Autónoma de México, México, DF, Mexico
Pedernera E.:
Departamento de Embriología, Facultad de Medicina, Universidad Nacional Autónoma de México, México, DF, Mexico
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