Glycoprotein gonadotropin in the plasma and its cellular origin in the adenohypophysis of sham-operated and ovariectomized rainbow trout, salmo gairdneri
Open Access
- 1 July 1981
- journal article
- research article
- Published by Springer Nature in Cell and tissue research
- Vol. 218 (2) , 439-448
- https://doi.org/10.1007/bf00210356
Abstract
Among the cells of the pituitary generally believed to produce glycoprotein gonadotropin (GTH) five forms were distinguished, based on the amount and the diameter of granules and globules and the appearance of the rough endoplasmic reticulum. In sham-operated trout so-called "globular" cells predominated, whereas after ovariectomy these were replaced by so-called "cisternal" cells, suggesting that both belong to one GTH-cell type. In addition, ovariectomy caused a strong increase in plasma GTH-levels. This indicates that the transition from globular to cisternal cells is accompanied by extrusion of GTH, and thus points to a storage of GTH in the granules and globules. It is argued that one of the five forms has the morphological characteristics of thyrotropic cells and may not produce glycoprotein GTHKeywords
This publication has 24 references indexed in Scilit:
- Responses of two different types of pituitary gonadotrophs of the loach, Misgurnus anguillicaudatus, to gonadectomy and to exogenous sex steroidsGeneral and Comparative Endocrinology, 1980
- Immunocytochemical localization of glycoprotein hormones in the rat anterior pituitary. A light and electron microscope study using antisera against rat bet subunits: a comparison between preembedding and postembeeding methods.Journal of Histochemistry & Cytochemistry, 1980
- Studies on two types of gonadotropins from both salmon and carp pituitariesGeneral and Comparative Endocrinology, 1979
- Ultrastructural evidence for two types of gonadotropic cells in the pituitary gland of the male three-spined stickleback, Gasterosteus aculeatusGeneral and Comparative Endocrinology, 1978
- A vitellogenic hormone with a large and a small form from salmon pituitariesGeneral and Comparative Endocrinology, 1978
- Les cellules gonadotropes hypophysaires du Saumon de l'Atlantique: Unicité ou dualité?General and Comparative Endocrinology, 1976
- The adenohypophysis of the flounder, Pleuronectes flesus, and the minnow, Phoxinus phoxinusCell and tissue research, 1975
- The nucleus lateralis tuberis system of the gobiid fish Gillichthys mirabilis: III. Functional modifications of the neurons and gonadotropic cellsGeneral and Comparative Endocrinology, 1971
- THE USE OF LEAD CITRATE AT HIGH pH AS AN ELECTRON-OPAQUE STAIN IN ELECTRON MICROSCOPYThe Journal of cell biology, 1963
- Embedding in Epoxy Resins for Ultrathin Sectioning in Electron MicroscopyStain Technology, 1960