Evidence for two secretory cell types in the Stannius bodies of the teleosts Fundulus heteroclitus and Carassius auratus

1980 ◽  
Vol 212 (2) ◽  
pp. 295-306 ◽  
Author(s):  
S. E. Wendelaar Bonga ◽  
J. C. A. van der Meij ◽  
P. K. T. Pang
Keyword(s):  
Carassius Auratus ◽  
Fundulus Heteroclitus ◽  
Secretory Cell ◽  
Cell Types

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.

scholarly journals LOCALIZATION OF PHOSPHATASE ACTIVITIES IN THE RAT ANTERIOR PITUITARY GLAND

1972 ◽  
Vol 20 (1) ◽  
pp. 1-12 ◽  
Author(s):  
GEORGES PELLETIER ◽  
ALEX B. NOVIKOFF
Keyword(s):  
Golgi Apparatus ◽  
Pituitary Gland ◽  
Anterior Pituitary ◽  
Secretory Cell ◽  
Cell Types ◽  
Anterior Pituitary Gland ◽  
Pituitary Cells ◽  
Blood Capillaries ◽  
Phosphatase Activities ◽  
Thiamine Pyrophosphatase

All five known secretory cell types of the rat anterior pituitary gland display nucleoside diphosphatase (NDPase) activity throughout the endoplasmic reticulum (ER), including the nuclear envelope but not the specialized region of ER at the inner aspect of the Golgi apparatus known as GERL. The functions of the ER diphosphatase are currently unknown. However, speculations concerning its association with glucuronyl transferase may focus on the metabolic roles of the ER in pituitary cells other than those directly related to secretory protein transport. The gonadotrophs have been studied for thiamine pyrophosphatase and acid phosphatase activities as well as NDPase activity. The results suggest that the secretory granules of gonadotrophs arise from GERL and not from the inner element of the Golgi apparatus. The innermost Golgi element of this cell type shows NDPase and thiamine pyrophosphatase activities and appears to be composed, in part at least, of anastomosing tubules. Nucleoside phosphatase activity is also present at the surfaces of all five secretory cell types and between the cells and adjacent blood capillaries.

Development and androgen regulation of the secretory cell types of the Syrian hamster (Mesocricetus auratus) Harderian gland

1993 ◽  
Vol 274 (1) ◽  
pp. 189-197 ◽  
Author(s):  
Maria J. Rodr�guez-Colunga ◽  
Carmen Rodr�guez ◽  
Isaac Antol�n ◽  
Higinio Ur�a ◽  
Delio Tolivia ◽  
...  
Keyword(s):  
Syrian Hamster ◽  
Secretory Cell ◽  
Harderian Gland ◽  
Cell Types ◽  
Mesocricetus Auratus ◽  
Androgen Regulation

scholarly journals Histological and histochemical characterization of the secretory cells of Choeradoplana iheringi Graff, 1899 (Platyhelminthes: Tricladida: Terricola)

2004 ◽  
Vol 64 (3a) ◽  
pp. 511-522 ◽  
Author(s):  
S. A. de Souza ◽  
A. M. Leal-Zanchet
Keyword(s):  
Secretory Cell ◽  
Basic Protein ◽  
Cell Types ◽  
Secretory Cells ◽  
Mucous Secretion ◽  
Cell Type ◽  
The Common ◽  
First Time ◽  
Histochemical Characterization

The present study aims at providing a detailed description of the histology, as well as the first histochemical characterization, of the secretory cells of the epidermis, pharynx, and copulatory organs of Choeradoplana iheringi, in order to give further support to studies on the physiology of these organs. The secretory cells are distinguished on the basis of secretion morphology and its staining properties, using trichrome methods and histochemical reactions. Four cell types open through the epidermis of Ch. iheringi, three of them secreting basic protein and a fourth containing glycosaminoglycan mucins. The epidermal lining cells store glycogen. In the pharynx, four secretory cell types were distinguished. Two types produce glycoprotein, a third type secretes basic protein, and another one produces glycosaminoglycan mucins. In the male copulatory organs, the prostatic vesicle receives four secretory cell types containing basic protein, except for one type which produces glycoprotein. The two secretory cell types opening into the male atrium secrete, respectively, glycoprotein, and glycosaminoglycan mucins. In the female copulatory organs, the female atrium and its proximal diverticulum, the vagina, receive two types of secretory cells producing, respectively, basic protein and glycosaminoglycan mucins. Another secretory cell type constitutes the so-called shell glands which open into the common glandular duct, secreting basic protein. The lining cells of the male and female atria produce a mucous secretion containing glycosaminoglycans. In addition, the lining epithelium of the female atrium presents an apical secretion of a proteic nature. The occurrence of a kind of spermatophore is reported for the first time for a species of Choeradoplana. This structure is located in the male or female atria in different specimens, and characterized by erythrophil, xanthophil, and/or mixed secretions associated with sperm.

Morphological study of the gut in Sagitta setosa, S. serratodentata and S. pacifica (Chaetognatha). Functional implications in digestive processes

1999 ◽  
Vol 79 (6) ◽  
pp. 1097-1109 ◽  
Author(s):  
Y. Perez ◽  
J. Arnaud ◽  
M. Brunet ◽  
J.-P. Casanova ◽  
J. Mazza
Keyword(s):  
Intestinal Epithelium ◽  
Morphological Study ◽  
Secretory Cell ◽  
Secretory Granules ◽  
Ciliated Cell ◽  
Posterior Part ◽  
Cell Types ◽  
Cell Type ◽  
Distinct Cell ◽  
Functional Implications

The study of the digestive epithelium in Sagitta setosa, S. serratodentata, and S. pacifica revealed only a few morphological and cytological differences among the three species. The gut was divided in two main regions. The first is the cephalic region where the epithelium is composed of three distinct cell types (S1, S2, and S3), the ultrastructure of which is probably specialized either for the synthesis of mucosubstances (S1), or enzymes (S3), or both (S2). The second region of the gut extends to the trunk and is mainly composed of the intestine and a short vertical rectum. No intestinal diverticula were observed. The intestinal epithelium displayed two ciliated cell types, anteriorly, a secretory cell type (S4) containing large mucus-like granules, and a second cell type (A) predominated in the posterior part of the intestine. A-cells appear to have two main functions. Although they exhibit secretory granules, they also display typical endocytotic features in their upper half, i.e. coated vesicles, a well-developed tubulo–vesicular network and two distinct types of digestive vacuoles corresponding to an endosome–lysosome-like system. From the distribution and presumed function of the cells, the gut may be divided in two main functional units, i.e. the cephalic and trunk units.

Three-dimensional architecture of Golgi apparatus in the hormone secretory cell

1991 ◽  
Vol 49 ◽  
pp. 252-253
Author(s):  
S. Tai ◽  
R.M. Albrecht
Keyword(s):  
Golgi Apparatus ◽  
Golgi Complex ◽  
Secretory Cell ◽  
Secretory Granules ◽  
Three Dimensional ◽  
Cell Types ◽  
Pituitary Cells ◽  
Golgi Stack ◽  
Secretory Products ◽  
Cell Fractions

The Golgi apparatus plays an important role in the process of packaging and sorting of secretory granules in endocrine and exocrine cells. The intra Golgi site for concentrating secretory materials, packaging, and sorting the secretory granules has been widely studied using cytochemical, immunocytochemical and biochemical methods on cells and cell fractions. It is generally accepted that the secretory products fo How the cis to trans pathway across the Golgi stack. Within the Golgi complex, secretory products appear to be concentrated in the dilated rims of the trans-most cisternae which are associated with the formation of secretory granules. In pituitary cells the organization of the Golgi apparatus is not as regular as that described for many other cell types. The cisternae of different Golgi stacks are irregular in size and shape. The cis-trans arrangement is not in a definitive orientation.

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