High-Dose Irradiation Inhibits Motility and Induces Autophagy in Caenorhabditis elegans
| Autor: | Tetsuya Sakashita, Qiu-Mei Zhang-Akiyama, Tomoo Funayama, Michiyo Suzuki, Akira Yamasaki, Takahito Moriwaki, Yasuhiko Kobayashi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
autophagy
QH301-705.5 Gfp reporter microbeam Motility Catalysis Green fluorescent protein Inorganic Chemistry Recovery mechanism Irradiation Physical and Theoretical Chemistry swimming Biology (General) Molecular Biology QD1-999 Spectroscopy Caenorhabditis elegans biology Chemistry Organic Chemistry Autophagy General Medicine region-specific irradiation C. elegans biology.organism_classification Computer Science Applications locomotion Fluorescence intensity Biophysics |
| Zdroj: | International Journal of Molecular Sciences, Vol 22, Iss 9810, p 9810 (2021) International Journal of Molecular Sciences; Volume 22; Issue 18; Pages: 9810 |
| ISSN: | 1661-6596 1422-0067 |
| Popis: | Radiation damages many cellular components and disrupts cellular functions, and was previously reported to impair locomotion in the model organism Caenorhabditis elegans. However, the response to even higher doses is not clear. First, to investigate the effects of high-dose radiation on the locomotion of C. elegans, we investigated the dose range that reduces whole-body locomotion or leads to death. Irradiation was performed in the range of 0–6 kGy. In the crawling analysis, motility decreased after irradiation in a dose-dependent manner. Exposure to 6 kGy of radiation affected crawling on agar immediately and caused the complete loss of motility. Both γ-rays and carbon-ion beams significantly reduced crawling motility at 3 kGy. Next, swimming in buffer was measured as a motility index to assess the response over time after irradiation and motility similarly decreased. However, swimming partially recovered 6 h after irradiation with 3 kGy of γ-rays. To examine the possibility of a recovery mechanism, in situ GFP reporter assay of the autophagy-related gene lgg-1 was performed. The fluorescence intensity was stronger in the anterior half of the body 7 h after irradiation with 3 kGy of γ-rays. GFP::LGG-1 induction was observed in the pharynx, neurons along the body, and the intestine. Furthermore, worms were exposed to region-specific radiation with carbon-ion microbeams and the trajectory of crawling was measured by image processing. Motility was lower after anterior-half body irradiation than after posterior-half body irradiation. This further supported that the anterior half of the body is important in the locomotory response to radiation. |
| Databáze: | OpenAIRE |
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