Observation of morphological abnormalities in silkworm pupae after feeding 137CsCl-supplemented diet to evaluate the effects of low dose-rate exposure
| Autor: | Akihiro Nohtomi, Tomoyuki Takahashi, Tadatoshi Kinouchi, Sota Tanaka, Daisuke Maki, Tsuguru Fujii, Tetsuji Imanaka, Sentaro Takahashi, Satoshi Fukutani |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
animal structures lcsh:Medicine 010501 environmental sciences Biology 01 natural sciences Particle transport Article Environmental impact 03 medical and health sciences Animal science Low dose rate lcsh:Science 0105 earth and related environmental sciences Multidisciplinary Dosimeter lcsh:R fungi Chronic ingestion Environmental sciences Fully developed Pupa Radiation exposure 030104 developmental biology Absorbed dose lcsh:Q |
| Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020) Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-020-72882-y |
| Popis: | Since the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident, morphological abnormalities in lepidopteran insects, such as shrinkage and/or aberration of wings, have been reported. Butterflies experimentally exposed to radiocesium also show such abnormalities. However, because of a lack of data on absorbed dose and dose–effect relationship, it is unclear whether these abnormalities are caused directly by radiation. We conducted a low dose-rate exposure experiment in silkworms reared from egg to fully developed larvae on a 137CsCl-supplemented artificial diet and estimated the absorbed dose to evaluate morphological abnormalities in pupal wings. We used 137CsCl at 1.3 × 103 Bq/g fresh weight to simulate 137Cs contamination around the FDNPP. Absorbed doses were estimated using a glass rod dosimeter and Monte Carlo particle transport simulation code PHITS. Average external absorbed doses were approximately 0.24 (on diet) and 0.016 mGy/day (near diet); the average internal absorbed dose was approximately 0.82 mGy/day. Pupal wing structure is sensitive to radiation exposure. However, no significant differences were observed in the wing-to-whole body ratio of pupae between the 137CsCl-exposure and control groups. These results suggest that silkworms are insensitive to low dose-rate exposure due to chronic ingestion of high 137Cs at a high concentration. |
| Databáze: | OpenAIRE |
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