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Lysek-Gladysinska M, Wieczorek A, Walaszczyk A, Jelonek K, Jozwik A, Pietrowska M, Dörr W, Gabrys D, Widlak P. Long-term effects of low-dose mouse liver irradiation involve ultrastructural and biochemical changes in hepatocytes that depend on lipid metabolism. Radiat Environ Biophys 2018; 57:123-132. [PMID: 29470638 DOI: 10.1007/s00411-018-0734-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 02/16/2018] [Indexed: 06/08/2023]
Abstract
The aim of the study was to investigate long-term effects of radiation on the (ultra)structure and function of the liver in mice. The experiments were conducted on wild-type C57BL/6J and apolipoprotein E knock-out (ApoE-/-) male mice which received a single dose (2 or 8 Gy) of X-rays to the heart with simultaneous exposure of liver to low doses (no more than 30 and 120 mGy, respectively). Livers were collected for analysis 60 weeks after irradiation and used for morphological, ultrastructural, and biochemical studies. The results show increased damage to mitochondrial ultrastructure and lipid deposition in hepatocytes of irradiated animals as compared to non-irradiated controls. Stronger radiation-related effects were noted in ApoE-/- mice than wild-type animals. In contrast, radiation-related changes in the activity of lysosomal hydrolases, including acid phosphatase, β-glucuronidase, N-acetyl-β-D-hexosaminidase, β-galactosidase, and α-glucosidase, were observed in wild type but not in ApoE-deficient mice, which together with ultrastructural picture suggests a higher activity of autophagy in ApoE-proficient animals. Irradiation caused a reduction of plasma markers of liver damage in wild-type mice, while an increased level of hepatic lipase was observed in plasma of ApoE-deficient mice, which collectively indicates a higher resistance of hepatocytes from ApoE-proficient animals to radiation-mediated damage. In conclusion, liver dysfunctions were observed as late effects of irradiation with an apparent association with malfunction of lipid metabolism.
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Affiliation(s)
- Malgorzata Lysek-Gladysinska
- Department of Cell Biology and Electron Microscopy, Institute of Biology, University of Jan Kochanowski, Swietokrzyska 15, 25-406, Kielce, Poland.
| | - Anna Wieczorek
- Department of Cell Biology and Electron Microscopy, Institute of Biology, University of Jan Kochanowski, Swietokrzyska 15, 25-406, Kielce, Poland
| | - Anna Walaszczyk
- Maria Sklodowska-Curie Institute, Oncology Center, Gliwice Branch Wybrzeze Armii Krajowej 15, 44-101, Gliwice, Poland
| | - Karol Jelonek
- Maria Sklodowska-Curie Institute, Oncology Center, Gliwice Branch Wybrzeze Armii Krajowej 15, 44-101, Gliwice, Poland
| | - Artur Jozwik
- Institute of Genetics and Animal Breeding, Polish Academy of Sciences, 05-552, Jastrzebiec, Poland
| | - Monika Pietrowska
- Maria Sklodowska-Curie Institute, Oncology Center, Gliwice Branch Wybrzeze Armii Krajowej 15, 44-101, Gliwice, Poland
| | - Wolfgang Dörr
- Department of Radiotherapy and Radiation Oncology, Medical Faculty Carl Gustav Carus, University of Technology, Dresden, Germany
- Department of Radiation Oncology, ATRAB, Applied and Translational Radiobiology, Medical University Vienna, Vienna, Austria
| | - Dorota Gabrys
- Maria Sklodowska-Curie Institute, Oncology Center, Gliwice Branch Wybrzeze Armii Krajowej 15, 44-101, Gliwice, Poland
| | - Piotr Widlak
- Maria Sklodowska-Curie Institute, Oncology Center, Gliwice Branch Wybrzeze Armii Krajowej 15, 44-101, Gliwice, Poland
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