INDUCTION OF A RETINAL DISORDER WITH CYCASIN IN NEWBORN MICE AND RATS

The newborns, less than 24 hours old, of C57BL/kg/day) was studied in rats which were kept either on a standard laboratory diet, or on a diet containing a large amount of fat (40%) and cholesterol (5%). PDC significantly increased the lactate dehydrogenase activity in the aortae of rats kept on a standard diet, and the malate dehydrogenase activity in the aortae of rats kept on high‐fat diet.6 strain mice and Morlyamaso strain rats received a single subcutaneous Injection of cycasin (0.5 mg/kg/day) was studied in rats which were kept either on a standard laboratory diet, or on a diet containing a large amount of fat (40%) and cholesterol (5%). PDC significantly increased the lactate dehydrogenase activity in the aortae of rats kept on a standard diet, and the malate dehydrogenase activity in the aortae of rats kept on high‐fat diet.g body weight In mice, 0.2 mg and 0.5 mg/g body weight In rats), and effects of cycasin on the retina were studied. Rosette formations were seen after the necrosis of cells in the neuroblasts layer. Especially, In rats treated with a large dose of cycasin, retinal hemorrhage from the choroid completely arrested the differentiation to each layer in the retina and resulted In its severe disorder. These changes were considered to belong to the same category as necrotic damage in the external granular layer of the cerebellum induced by cycasin.