scholarly journals Response of PAS-positive cells of the pituitary pars intermedia in the teleost Carassius auratus to acid water

1986 ◽  
Vol 243 (3) ◽  
pp. 609-617 ◽  
Author(s):  
S. E. Wendelaar Bonga ◽  
J. C. A. van der Meij ◽  
G. Flik
Keyword(s):  
Carassius Auratus ◽  
Acid Water ◽  
Pars Intermedia

Histophysiology and innervation of the pituitary gland of the goldfish, Carassius auratus L.: a light and electron microscope investigation

1972 ◽  
Vol 50 (6) ◽  
pp. 835-844 ◽  
Author(s):  
John F. Leatherland
Keyword(s):  
Electron Microscope ◽  
Basement Membrane ◽  
Carassius Auratus ◽  
Secretory Cell ◽  
Morphological Characteristics ◽  
Cell Types ◽  
Pars Intermedia ◽  
Electron Microscope Investigation ◽  
Goldfish Carassius Auratus ◽  
Granule Release

Six secretory cell types (prolactin-, ACTH-, somatotropin- (STH-), TSH-, and two presumptive gonadotropin- (GTH-) secreting cells) were identified in light or electron microscope preparations of goldfish pars distalis. A further two cell types of unknown function were demonstrated in the pars intermedia. Cellular identification was based on the position of cells within the adenohypophysis and on the staining properties or morphological characteristics of the cytoplasmic granules.The prolactin-, ACTH-, and STH-secreting cells and the pars intermedia cells appeared to release granules into the basement membrane whereas granule release from TSH- and GTH-secreting cells was not found.Many of the adenohypophysial cell types were innervated directly or across a basement membrane by B-type neurohypophysial fibers. A-type neurosecretory fibers were associated with blood vessels and pituicytes within the neurohypophysis. The possible role(s) of the two types of pituicytes is discussed.

SEM of Hepatocytes and Biliary Passages in Goldfish Liver

1977 ◽  
Vol 35 ◽  
pp. 556-557
Author(s):  
Waykin Nopanitaya ◽  
Joe W. Grisham ◽  
Johnny L. Carson
Keyword(s):  
Carassius Auratus ◽  
Cell Layer ◽  
Three Dimensional ◽  
Cell Types ◽  
Biliary System ◽  
Fish Food ◽  
Commercial Fish ◽  
Goldfish Carassius Auratus ◽  
Commercial Fish Food

An interesting feature of the goldfish liver is the morphology of the hepatic plate, which is always formed by a two-cell layer of hepatocytes. Hepatic plates of the goldfish liver contain an infrequently seen second type of cell, in the centers of plates between two hepatocytes. A TEH study by Yamamoto (1) demonstrated ultrastructural differences between hepatocytes and centrally located cells in hepatic plates; the latter were classified as ductule cells of the biliary system. None of the previous studies clearly showed a three-dimensional organization of the two cell types described. In the present investigation we utilize SEM to elucidate the arrangement of hepatocytes and bile ductular cells in intralobular plates of goldfish liver.Livers from young goldfish (Carassius auratus), about 6-10 cm, fed commercial fish food were used for this study. Hepatic samples were fixed in 4% buffered paraformaldehyde, cut into pieces, fractured, osmicated, CPD, mounted Au-Pd coated, and viewed by SEM at 17-20 kV. Our observations were confined to the ultrastructure of biliary passages within intralobular plates, ductule cells, and hepatocytes.

Ultrastructural investigation of an adenoma of the pituitary post mortem

1987 ◽  
Vol 45 ◽  
pp. 622-623
Author(s):  
Shirley Siew ◽  
W. C. deMendonca
Keyword(s):  
Deleterious Effect ◽  
Anterior Lobe ◽  
Definitive Diagnosis ◽  
Pars Intermedia ◽  
Post Mortem ◽  
Close Apposition ◽  
Autopsy Material ◽  
Progressive Loss ◽  
Transmission Electron ◽  
Means Of Transmission

The deleterious effect of post mortem degeneration results in a progressive loss of ultrastructural detail. This had led to reluctance (if not refusal) to examine autopsy material by means of transmission electron microscopy. Nevertheless, Johannesen has drawn attention to the fact that a sufficient amount of significant features may be preserved in order to enable the establishment of a definitive diagnosis, even on “graveyard” tissue.Routine histopathology of the autopsy organs of a woman of 78 showed the presence of a well circumscribed adenoma in the anterior lobe of the pituitary. The lesion came into close apposition to the pars intermedia. Its architecture was more compact and less vascular than that of the anterior lobe. However, there was some grouping of the cells in relation to blood vessels. The cells tended to be smaller, with a higher nucleocytoplasmic ratio. The cytoplasm showed a paucity of granules. In some of the cells, it was eosinophilic.

Induction of Gynogenesis and Androgenesis in Goldfish Carassius auratus (var. oranda)

2001 ◽  
Vol 36 (3-4) ◽  
pp. 195-198 ◽  
Author(s):  
I Paschos ◽  
L Natsis ◽  
C Nathanailides ◽  
I Kagalou ◽  
E Kolettas
Keyword(s):  
Carassius Auratus ◽  
Goldfish Carassius Auratus
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