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Anat Embryol (Berl)
1975 May 16;1463:245-64. doi: 10.1007/bf00302173.
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Studies on the liver of Xenopus laevis. I. The ultrastructure of the parenchymal cell.
Spornitz UM
.
Abstract
The liver of Xenopus laevis was examined with electron microscopy. Its structure was found to be markedly different from that of mammals, particularly regarding the morphology of the hepatocytes to be classified as typical. It was established that the main function of such a cell is the storage of glycogen, and further that it possesses only scant organelles and other inclusions. Since this type of cell was found most frequently in the liver of untreated animals, it was designated as normal cell. The fact appears noteworthy that in the normal liver of Xenopus laevis an abundance of cell types occur which are otherwise found to be proliferated under experimental conditions, e.g. cells with pronouncedly augmented RER, enlarged Golgi complexes, increased lipid inclusions etc. This high number of divergent hepatocytes and the fact that all intermediate stages between the individual extremes are present and not to be accounted for by the position of the cell within the liver was interpreted as being the expression of a cyclic passage of the various stages of activity. It is of special interest that augmented degradation of glycogen in the liver cell takes place only during vitellogenesis. Acute and chronic hunger, as well as adaptation to cold, hardly affect the morphology of the normal cell, especially as far as the glycogen is concerned. The possible causes for this are discussed.
Berg,
Sulfate metabolism in pancreatic acinar cells.
1971, Pubmed
Berg,
Sulfate metabolism in pancreatic acinar cells.
1971,
Pubmed
Berlin,
Temperature-induced alterations in hepatocyte structure of rainbow trout (Salmo gairdneri).
1967,
Pubmed
Brachet,
[Seasonal morphological and biochemical changes in the liver of Rana esculenta].
1971,
Pubmed
Campbell,
Electron microscopic studies on granulocytopoiesis in the slender salamander.
1969,
Pubmed
Cardell,
Action of metabolic hormones on the fine structure of rat liver cells. I. Effects of fasting on the ultrastructure of hepatocytes.
1971,
Pubmed
Cardell,
Correlation between structure and glycogen content of livers from rats on a controlled feeding schedule.
1973,
Pubmed
ELIAS,
The structure of the liver of vertebrates.
1952,
Pubmed
Flaks,
Observations on the fine structure of the normal porcine liver.
1971,
Pubmed
Hodges,
The ultrastructure of the liver parenchyma of the immature fowl (Gallus domesticus).
1972,
Pubmed
ITO,
[Morphological studies of the fat storage cells of the liver in various vertebrates. I. Fat storage cells of hoofed animals].
1956,
Pubmed
KARRER,
Electron-microscopic study of glycogen in chick embryo liver.
1960,
Pubmed
Karasaki,
Cytoplasmic and nuclear glycogen synthesis in Novikoff ascites hepatoma cells.
1971,
Pubmed
Leveille,
Diurnal variations in tissue glycogen and liver weight of meal-fed rats.
1967,
Pubmed
Loud,
A quantitative stereological description of the ultrastructure of normal rat liver parenchymal cells.
1968,
Pubmed
Mizell,
Long period rhythms of liver glycogen content.
1971,
Pubmed
Mizell,
Short period rhythms of liver glycogen content.
1971,
Pubmed
Nicholls,
The effects of oestrogens and other steroid hormones on the ultrastructure of the liver of Xenopus laevis Daudin.
1968,
Pubmed
,
Xenbase
Orci,
Fenestrae in the rough endoplasmic reticulum of the exocrine pancreatic cells.
1972,
Pubmed
Oudea,
[Hepatic ultrastructure. I. The normal liver].
1967,
Pubmed
REYNOLDS,
The use of lead citrate at high pH as an electron-opaque stain in electron microscopy.
1963,
Pubmed
Rudack,
On the site of phosvitin synthesis in Xenopus laevis.
1968,
Pubmed
,
Xenbase
SOLLBERGER,
THE CONTROL OF CIRCADIAN GLYCOGEN RHYTHMS.
1964,
Pubmed
Spiegel,
Some observations on the ultrastructure of the hepatocyte in the metamorphosing tadpole.
1970,
Pubmed
Spornitz,
Ultrastructural studies of oogenesis in some European amphibians. II. Triturus vulgaris.
1973,
Pubmed
Spornitz,
Studies on the liver of Xenopus laevis. II. The ultrastructure of the peritoneal cover and the perihepatic layer.
1975,
Pubmed
,
Xenbase
Tuchweber,
Intramitochondrial lamellar formations induced by pregnenolone-16- -carbonitrile in the hepatocytes of pregnant rats.
1972,
Pubmed
Visentin,
Allantoinase: association with amphibian hepatic peroxisomes.
1969,
Pubmed
WOOD,
Some structural features of the bile canaliculus in calf liver.
1961,
Pubmed
WRIGHT,
Blood sugar studies in the bullfrog, Rana catesbiana.
1959,
Pubmed
Wake,
"Sternzellen" in the liver: perisinusoidal cells with special reference to storage of vitamin A.
1971,
Pubmed
Wallace,
Studies on amphibian yolk. 8. The estrogen-induced hepatic synthesis of a serum lipophosphoprotein and its selective uptake by the ovary and trasformation into yolk platelet proteins in Xenopus laevis.
1969,
Pubmed
,
Xenbase
Weibel,
Correlated morphometric and biochemical studies on the liver cell. I. Morphometric model, stereologic methods, and normal morphometric data for rat liver.
1969,
Pubmed
