Chronic Occupational Exposure to Ionizing Radiation Induces Alterations in the Structure and Metabolism of the Heart: A Proteomic Analysis of Human Formalin-Fixed Paraffin-Embedded (FFPE) Cardiac Tissue

被引:21
作者
Azimzadeh, Omid [1 ]
Azizova, Tamara [2 ]
Merl-Pham, Juliane [3 ]
Blutke, Andreas [4 ]
Moseeva, Maria [2 ]
Zubkova, Olga [2 ]
Anastasov, Natasa [1 ]
Feuchtinger, Annette [4 ]
Hauck, Stefanie M. [3 ]
Atkinson, Michael J. [1 ,5 ]
Tapio, Soile [1 ]
机构
[1] German Res Ctr Environm Hlth GmbH, Helmholtz Zentrum Munchen, Inst Radiat Biol, D-85764 Neuherberg, Germany
[2] Southern Urals Biophys Inst SUBI, Ozyorsk 456780, Russia
[3] German Res Ctr Environm Hlth, Helmholtz Zentrum Munchen, Res Unit Prot Sci, D-80939 Munich, Germany
[4] German Res Ctr Environm Hlth GmbH, Helmholtz Zentrum Munchen, Res Unit Analyt Pathol, D-85764 Neuherberg, Germany
[5] Tech Univ Munich, Chair Radiat Biol, D-81675 Munich, Germany
关键词
FFPE; ionizing radiation; occupational exposure; proteomics; label-free; PPAR alpha; heart; ischemia; cardiovascular disease; SAMPLE PREPARATION; MASS-SPECTROMETRY; MAYAK PA; DISEASE; EXPRESSION; PROTEINS; FROZEN; COHORT; MODEL;
D O I
10.3390/ijms21186832
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Epidemiological studies on workers employed at the Mayak plutonium enrichment plant have demonstrated an association between external gamma ray exposure and an elevated risk of ischemic heart disease (IHD). In a previous study using fresh-frozen post mortem samples of the cardiac left ventricle of Mayak workers and non-irradiated controls, we observed radiation-induced alterations in the heart proteome, mainly downregulation of mitochondrial and structural proteins. As the control group available at that time was younger than the irradiated group, we could not exclude age as a confounding factor. To address this issue, we have now expanded our study to investigate additional samples using archival formalin-fixed paraffin-embedded (FFPE) tissue. Importantly, the control group studied here is older than the occupationally exposed (>500 mGy) group. Label-free quantitative proteomics analysis showed that proteins involved in the lipid metabolism, sirtuin signaling, mitochondrial function, cytoskeletal organization, and antioxidant defense were the most affected. A histopathological analysis elucidated large foci of fibrotic tissue, myocardial lipomatosis and lymphocytic infiltrations in the irradiated samples. These data highlight the suitability of FFPE material for proteomics analysis. The study confirms the previous results emphasizing the role of adverse metabolic changes in the radiation-associated IHD. Most importantly, it excludes age at the time of death as a confounding factor.
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页码:1 / 21
页数:24
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