両生類の幼生に投与した放射性銀

概要

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The disribution of radiosilver in various tissues and organs in larvae of Rhacophorus arboreus (OKADA ET KAWANO) and Hynobius nebulosus (SCHLEGEL) reared in tap water containing ^<110m>AgNO_3 with carrier silver nitrate equivalent to 1.5μg Ag per ml, was studied mainly by the aid of photometry of their autoradiographs. There was found no essential difference in radiosilver distribution between the two species. Radiosilver was found to be retained markedly in intestinal and branchial epithelium, slightly in pigment epithelium of retina, skin, and coelomic epithelium and hardly any in muscle, cartilage, brain and other tissues. Rhacophorus larvae accumulated radiosilver in the lumen of the intestine as much as a 20 times higher concentration than those of the rearing water, whereas in Hynobius larvae the case is altered. This may be due to the fact that Rhacophorus larvae have opportunities to take up the radiosilver deposited on the wall of vessel more frequently than Hynobius larvae which never nibble on the wall. Radiosilver injected into tissue such as muscle or brain remained at the site of injection, showing no symptoms of disappearance at least within 48 hours. If we employ radiosilver for the purpose of detecting cell migration in the course of regeneration or development, radiosilver may be suitable for labeling muscle or epithelial cells.
社団法人日本動物学会の論文
1965-01-15