Morphologic studies of bone marrow cells exposed to the phospholipid fraction from the liver of irradiated animal, an experiment in vitro

With the purpose of revealing the biological effects of the X-ray irradiation the authors extracted phospholipids from the liver of irradiated animals and proved that this substance has the action to inhibit the growth of the bone marrow cells, the motility of pseudo-eosinophilis and the erythropoiesis in tissue culture, suggesting that the injury will mainly be induced by the toxic substances produced by irradiation.</p

Experimental Studies on the Nature of X-Ray Disturbance Part I. Effect of Unsaturated Fatty-Acid Fraction Extracted from X-Ray Irradiated Rabbit-Liver on Succinic Dehydrogenase System of Ehrlich-Ascites-Tumor Cells

There are many investigations on the disturbances caused by x-rays but these works are consisted mainly of histo-morphological researches and rerely from the viewpoint of the acting mechanism of cells. More recently Lea, Barron et al, however, have studied the histochemical changes in the animals irradiated with x-rays and they have clarified the direct action of x-ray irradiation to a certain extent. In our laboratory Dr. Yamamoto has succeeded in isolating a certain cytotoxin from unsaturated fatty acid fraction, an extract of the liver of the rabbits exposed to x-rays. In the subsequent studies with this cytotoxin it has been found that this substance has an inhibitory action on the mitosis of tumor cells. Therfore, we have carried out a series of experiments to see the effect of this substance, in the presence of succinic dehydrogenase, on the respiration of Ehrlich-ascites-tumor cells. As the result it has been confirmed that this cytotoxin possesses an action as to depress both the respiration of the cancer cell and that of normal liver cells

Studies on the Cell Toxin Produced by X-Ray Irradiation Part 2. The Morphological Changes and in Vivo Reactions of the Succinic Dehydrogenase System in Ehrlich Ascites Tumor Cells Induced by the Unsaturated Fatty Acid Fraction Extracted from the Rabbit Liver after X-ray Irradiation

In Part 1. the author investigatad the effects of the unsaturated fatty acid fraction extracted from the rabbit liver after x-ray irradiation on the succinic dehydrogenase system in Ehrlich ascites tumor cells and in the normal rabbit liver, and it was concluded that although this fraction does not greatly affect the normal liver cells, at a higher concentration it seems to induce cell degeneration which in turn results in a decrease in the respiratory enzyme activity. In the present experiment the author studied the morphological changes brought about by this substance in Ehrlich ascites tumor cell and the in vivo changes induced by it in the succinic dehydrogenase system. In conducting this experiment the results obtained by Yamamoto et al. of our department were referred to. With respect to the morphological changes in the tumor cells, it was observed that this substance acting for a short period of time will accelerate the respiratory enzyme activity transiently while when acting for a longer period, it decreases the activity. These findings agree more or less well with the results in Part 1. Even in the in vivo reactions the respiratory enzyme activity in the tumor cells is elevated temporarily and when acting for a longer period of time this substance decreases the activity. From these findings it is concluded that this substance does elevate the respiratory enzyme activity transiently but when it acts for a longer period of time, it seems to bring about a fall in the activity and further acting directly on the respiratory enzymes it induces the disorder in respiration

The Effect of the Unsaturated Fatty Acid Fraction from the Liver of Irradiated Rabbit on the Fertilization and Cell Division

The effect of unsaturted fatty acid fraction from the liver of irradiated animal on fertilization and cell division of sea urchin egg (Hemicentrotas tulcherrimus) have been observed. The sperms exposed to the substance for 5 minutes decrease in their mortility and lost the fertilization acivitity resuting in the lose of their ability for the formation of fertilizing membrae in eggs. The eggs exposed to this substance after fertilization present the stop or the delay in their cleavage. Such an action on eggs becomes marked when the concentration of this substance increases. The most susceptible stage seems to be the metaphase at which the chromosoms are arrested on the equatolial plate loosing the tendency to move toward the poles. These effects of this substace can be seen even after removing the peroxide as equally in the original substance