Journal
SCIENTIFIC REPORTS
Volume 3, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/srep02850
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Funding
- Japan Society for the Promotion of Science
- Emergency Budget for the Reconstruction of Northeastern Japan, MEXT, Japan
- Discretionary Expense of the President of Tohoku University
- Nippon Life Insurance Foundation
- Programme for Promotion of Basic and Applied Researches for Innovations in Bio-oriented Industry
- Grants-in-Aid for Scientific Research [23780278, 24659174] Funding Source: KAKEN
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We aimed to investigate the effect of chronic radiation exposure associated with the Fukushima Daiichi Nuclear Plant accident on the testis from 2 bulls. Estimated dose of internal exposure in one bull was 0.7-1.2 mGy (Cs-134) and 0.4-0.6 mGy (Cs-137) and external exposure was 2.0 mGy (Cs-134) and 0.8 mGy (Cs-137) (196 days). Internal dose in the other was 3.2-6.1 mGy (Cs-134) and 1.8-3.4 mGy (Cs-137) and external dose was 1.3 mGy (Cs-134) and 0.6 mGy (Cs-137) (315 days). Sperm morphology and spermatogenesis were within normal ranges. (134,) Cs-137 radioactivity was detected but Cs was not detectable in the testis by electron probe microanalysis. Thus, adverse radiation-induced effects were not observed in bull testes following chronic exposure to the above levels of radiation for up to 10 months. Since we could analyse a limited number of testes, further investigation on the effects of ionizing radiation on spermatogenesis should be extended to more animals.
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