X-ray- and ultraviolet-radiation-induced mutations in Muta(TM) mouse

Tetsuya Ono, Hironobu Ikehata, Yoshio Hosoi, Bok Shil Shung, Akihiro Kurishita, Xue Wang, Kazuo Yamamoto, Takayoshi Suzuki, Toshio Sofuni

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


To evaluate the usefulness of the transgenic Muta(TM) mouse for investigating radiation-induced mutations in vivo, we have examined the effects of whole-body X irradiation and compared them to the effects of ultraviolet light. The spontaneous mutation frequencies in young adults were about 7 x 10-5 in the spleen, liver and skin. The mutation frequencies 1 week after a lethal dose of X radiation (8 Gy) were 3.2, 2.6 and 2.7 times the spontaneous levels in the spleen, liver and skin, respectively. When the skin was irradiated with 10 kJ m-2 of UVB, the mutation frequency increased about 6 times. The mutation frequencies induced by an acute dose of 4 Gy or by a fractionated dose of 11.7 Gy (0.15 Gy x 78 times, 3 times/week) in the spleen and liver were less than 2-fold the spontaneous levels at 16 weeks after irradiation. A comparison of X and UV radiation was also conducted with cultured cells derived from the mouse embryo. UVC of 5 J m-2 raised the mutation frequency to 15 times that of unirradiated cells, while 10 Gy X rays raised it 2.6 times. The findings indicate that the Muta(TM) mouse is less sensitive to X-ray-induced mutation than UV-induced mutation.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalRadiation Research
Issue number2
Publication statusPublished - 1997 Aug


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