Effect of Transplanted Pieces from Non-X-irradiated Worms on Irradiated Ones in Dugesia japonica

概要

論文の詳細を見る
1. Upon X-ray irradiation at a dose over 3,000r regeneration of tissue of freshwater planarian, Dugesia japonica Ichikawa et Kawakatsu was completely inhibited, and the worm decayed resulting in death. But even just before death some neoblasts remained. 2. When the anterior part of an irradiated worm was joined to the posterior part of a non-irradiated worm, a cut was made in the anterior part, a head regenerated at the anterior cut surface to form a normal worm. Neoblats from the non-irradiated component multiplied by division and invaded the irradiated component, replacing the irradiated tissue. 3. When an irradiated worm and a non-irradiated worm were sectioned longitudinally along the median line, and corresponding parts were exchanged, and subsequently the head removed, healthy tissue invaded the irradiated component, resulting in a normal worm. 4. The irradiated region between the regeneration bud and non-irradiated region contains neoblasts and "differentiating cells" derived from them, just like the regeneration bud. From this and other data we propose that neoblasts do not migrate directly by ameboid movement, but reach the cut surface after repeated fission and multiplication. 5. The possibility that irradiated neoblasts recover under the influence of healthy tissue is excluded. Acknowledgement The authors wish to express sincere thanks to Dr. Atsuhiko Takeda, Radiation Center of Osaka Prefecture, and Dr. Iwashiro Oki, Osaka Prefetural Institute of Public Health, for their kind guidance on the techniques of X-ray irradiation.
大阪教育大学の論文

Effect of Transplanted Pieces from Non-X-irradiated Worms on Irradiated Ones in Dugesia japonica

スポンサーリンク

概要

著者

関連論文

スポンサーリンク