"Autoimmunity" in rabbits. Sensitization to autologous ferritin by means of heterologous ferritin

Rabbits that had received repeated subcutaneous injections of horse spleen ferritin in adjuvant developed antibodies that gave precipitin reactions with horse, rat, human and rabbit ferritins, including autologous ferritin from spleens of immunized animals. In the immunized animals, cutaneous Arthus reactions were readily induced with all of the cross-reacting ferritins, including autologous rabbit ferritin. The antibodies also sensitized healthy rabbits to rabbit ferritin as shown by the development of passive cutaneous Arthus reactions.

These results underline the necessity of distinguishing between true autoimmunity, induced by an autologous immunogen, and `autoimmunity' induced by a foreign antigen related structurally to an autologous substance. To make this distinction with certainty, the primary immunogen must be known.

Experimental immune diabetes in the rabbit. Light, fluorescence, and electron microscopic studies

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The histopathology of immune diabetes in the rabbit

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Erythrocyte transfer RNA: change during chick development

Radioactive aminoacyl transfer RNA's isolated from erythrocytes in the blood of 4-day-old chick embryos and from reticulocytes of adult chickens were analyzed by chromatography on methylated albumin kieselguhr and freon columns. Embryonic and adult methionyl transfer RNA's showed qualitative and quantitative differences in both chromatographic systems. The patterns for arginyl, seryl, and tyrosyl transfer RNA's in the two cell types were similar, while the leucyl transfer RNA patterns suggested a difference.