1962 年 8 巻 3-4 号 p. 310-326
This experiment was attempted to bring to light the production mechanism of auto-antibody, homologous and heterologous antibodies to red cells, as well as the destruction mechanism in vivo of red cells caused by the presence of these antibodies.
Rabbits were used for the experiment.
Consideration was advanced principally concerning the determination of the activity value of Cr51 labelled on red cells, availing of the specific and convenient nature of isotope Cr51 and red cells in the ability of association and dissociation with each other, and at the same time a serological experiment on the serum was jointly performed for the consideration.
The survival time in vivo of the same typed as well as different typed red cells was measured after the rabbit's blood was typed with antisera, with the result that the loss curve of both the same type and the different type cells practically coincided with that of the auto-cells.
The repeated infusion of enzyme (trypsin) treated auto-cells into normal and splenectomized rabbits reveals an increased rapidity in the loss of the trypsin treated auto-cells with added frequency of the repetition. On further examining the serum of this particular rabbit, the presence of an antibody to auto-cells was proved.
The experiment made on a splenectomized rabbit by infusion homologous red cells of the same as well as different types, heterologous cells and trypsin treated auto-cells, made it clear that there was no significant difference in the loss curve of homologous cells, but that the losing speed of heterologous cells from the blood flow was extra rapid during the first 30 minutes of its infusion, and also that thereafter the loss curve was obtained almost in parallel with that of a normal rabbit.
With regard to trypsin treated cells it was confirmed that its repeated infusion caused reduction of the loss curve and production of an auto-antibody, regardless of the presence or non-presence of spleen.
The distribution of the infused normal auto-cells, trypsin treated auto-cells and heterologous cells was examined in heart blood, liver, spleen and kidney to find that the distribution of heterologous cells in the sysem was considerably different from that of homologous cells.
Of the blood cells denatured by trypsin treatment, the homologous cells and the heterologous cells differ remarkably in the way they are destroyed and disposed, but the homologous cells which have been subjected to a powerful irreversible change are disposed in the liver in compensation of the spleen, same as heterolgoous cells.