ABSTRACT
This paper presents the results of an ultrustructural study of the hepatoma cell lines FSK 7901, FSK 7902 of long term cultures about 2 years more.The size of cell varies. Distribution of the cell is single or in epitheloid monolayer. Pseudopodial processes or microvilli cover the perimeter of certain hepatoma cells. In the monolayer, the microvilli exist where the neighboring plasmalemmae are in loose contact. When their contact is close, the neighboring plasmalemmae may be straight, wavelike or interdigitated. The nucleus and enlarged nucleoli are irregu- lar in shape. The deformity of nucleolonema is remarkable.Rough endoplasmic reticulum (RER) and mitochondria are much less in number in the cytoplasm, but the free ribosomes is very abundant. The shape of mitochondria and their cristae are irregular. The Golgi complex is often or less arranged around 10 in a group, situated near the nucleus. Typical coucentric body from RER or SER has not been observed. Annulate lamellae are easily found. A peculiar structure, primordial rough-surfaced endoplasmic reticulum (PRER) is seen.Juxta-nuclear acidophilic area consists of a group of Goigi complex or Golgi complex and mitochondria.
ABSTRACT
We prepared bovine epidermal keratin (EK) antibody, which can be used as a specific marker of cholangiocarcinoma(CC) cells to be distinguished from hepatocellular carcinoma (HCC) cells. The intrahepatically implanted solid tumors of FSK 7901 and FSK 7902 have the histological structures of CC and HCC, respectively. Using immunofluorescence and PAP techniques, we demonstrated that, in the solid tumors, FSK 7901 cells are definitely EK-positive, while most of the cells of FSK 7902 are EK-negative. Therefore, we considered FSK 7901 and FSK 7902 as CC and HCC, respectively. In the solid tumors of FSK 7902, few cells which are EK-positive may be those in which there are Mallory bodies or the structures are forming.
ABSTRACT
Epitheloid hepatomic cell lines FSK 7901, FSK 7902 were established in cell culture from male rats with an average body weight 103.03?26.73 g sacrified 131?24.94 days after feeding with 107.1?25.65 mg. of diethylnitrosamine(DEN).The chromosome number of the majority of the cells from FSK 7901, FSK 7902 falls between a range of 63～84 with a mode of 81.The cells are very closely arranged in FSK 7901, but loosely in FSK 7902.The distribution of the smallest basophilic hepatomic cells of FSK 7901 are regularly around or within the new growth area, but in FSK 7902 are irregularly scattered.The acentrically displaced bean-shaped nuclei of moderate or large hepatomic cells with large juxtanuclear acidophilic area are more numerous and distinct in FSK 7901 than in FSK 7902.The growth of FSK 7902 is more rapid than FSK 7901 as judged from the main cell cycle time from population doubling time during lorgarthmic growth of culture and the average of mitotic index.
ABSTRACT
Liver carcinogenesis induced by diethylnitrosamine (DEN) was studied in 19 male albino rats under electron microscope. The effects of DEN on hepatocytes included following basic abnomalities:1. The characteristic features of the nucleus are irregulat in shape, increase of interchromatin granules, and decrease of nucleolus-associated chromatin. The nucleoli are enlarged, irregular in shape and showing remarkable deformity of nucleolonema.2. The characteristic features of the cytoplasm are as follows. The mitochondria increase or decrease in number and size, they are irregular in shape with some variation in cristal pattern. Endoplasmic reticulum (ER) increases in the width of the lumina, detachment of some ribosomes from the membraneous component of rough endoplasmic reticulum (RER) and the appearance of concentric bodies of ER (RER concentric body or SER concentric body).3. The characteristic features of the cell membrane are the increase in the number of microvilli facing the Disses' space, the enlargement of bile canaliculi with increase or decrease in number of microvilli. Plasmalemma connecting between the adjacent hepatoma cells may be straight, wavelike or interdigitated.