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Ardasheva R, Popov V, Yotov V, Prissadova N, Pencheva M, Slavova I, Turiyski V, Krastev A. Accelerated Electron Ionization-Induced Changes in the Myenteric Plexus of the Rat Stomach. Int J Mol Sci 2024; 25:6807. [PMID: 38928511 PMCID: PMC11203758 DOI: 10.3390/ijms25126807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 06/17/2024] [Accepted: 06/18/2024] [Indexed: 06/28/2024] Open
Abstract
The influence of accelerated electrons on neuronal structures is scarcely explored compared to gamma and X-rays. This study aims to investigate the effects of accelerated electron radiation on some pivotal neurotransmitter circuits (cholinergic and serotonergic) of rats' myenteric plexus. Male Wistar rats were irradiated with an electron beam (9 MeV, 5 Gy) generated by a multimodality linear accelerator. The contractile activity of isolated smooth muscle samples from the gastric corpus was measured. Furthermore, an electrical stimulation (200 μs, 20 Hz, 50 s, 60 V) was performed on the samples and an assessment of the cholinergic and serotonergic circuits was made. Five days after irradiation, the recorded mechanical responses were biphasic-contraction/relaxation in controls and contraction/contraction in irradiated samples. The nature of the contractile phase of control samples was cholinergic with serotonin involvement. The relaxation phase involved ACh-induced nitric oxide release from gastric neurons. There was a significant increase in serotonergic involvement during the first and second contractile phases of the irradiated samples, along with a diminished role of acetylcholine in the first phase. This study demonstrates an increased involvement of serotonergic neurotransmitter circuits in the gastric myenteric plexus caused by radiation with accelerated electrons.
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Affiliation(s)
- Raina Ardasheva
- Department of Medical Physics and Biophysics, Faculty of Pharmacy, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria; (R.A.); (N.P.); (M.P.); (V.T.)
| | - Veselin Popov
- Section of Radiotherapy and Nuclear Medicine, Department of Clinical Oncology, Faculty of Medicine, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria;
| | - Viktor Yotov
- Department of Medical Physics and Biophysics, Faculty of Pharmacy, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria; (R.A.); (N.P.); (M.P.); (V.T.)
| | - Natalia Prissadova
- Department of Medical Physics and Biophysics, Faculty of Pharmacy, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria; (R.A.); (N.P.); (M.P.); (V.T.)
| | - Mina Pencheva
- Department of Medical Physics and Biophysics, Faculty of Pharmacy, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria; (R.A.); (N.P.); (M.P.); (V.T.)
| | - Iva Slavova
- Department of Chemical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria;
| | - Valentin Turiyski
- Department of Medical Physics and Biophysics, Faculty of Pharmacy, Medical University of Plovdiv, 4002 Plovdiv, Bulgaria; (R.A.); (N.P.); (M.P.); (V.T.)
| | - Athanas Krastev
- Medical College, Trakia University, 6015 Stara Zagora, Bulgaria;
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Zhang Y, Zhang Y, Shen C, Hao S, Duan W, Liu L, Wei H. Ionizing radiation alters functional neurotransmission in Drosophila larvae. Front Cell Neurosci 2023; 17:1151489. [PMID: 37484822 PMCID: PMC10357008 DOI: 10.3389/fncel.2023.1151489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 06/22/2023] [Indexed: 07/25/2023] Open
Abstract
Introduction Patients undergoing cranial ionizing radiation therapy for brain malignancies are at increased risk of long-term neurocognitive decline, which is poorly understood and currently untreatable. Although the molecular pathogenesis has been intensively researched in many organisms, whether and how ionizing radiation alters functional neurotransmission remains unknown. This is the first study addressing physiological changes in neurotransmission after ionizing radiation exposure. Methods To elucidate the cellular mechanisms of radiation damage, using calcium imaging, we analyzed the effects of ionizing radiation on the neurotransmitter-evoked responses of prothoracicotropic hormone (PTTH)-releasing neurons in Drosophila larvae, which play essential roles in normal larval development. Results The neurotransmitters dopamine and tyramine decreased intracellular calcium levels of PTTH neurons in a dose-dependent manner. In gamma irradiated third-instar larvae, a dose of 25 Gy increased the sensitivity of PTTH neurons to dopamine and tyramine, and delayed development, possibly in response to abnormal functional neurotransmission. This irradiation level did not affect the viability and arborization of PTTH neurons and successful survival to adulthood. Exposure to a 40-Gy dose of gamma irradiation decreased the neurotransmitter sensitivity, physiological viability and axo-dendritic length of PTTH neurons. These serious damages led to substantial developmental delays and a precipitous reduction in the percentage of larvae that survived to adulthood. Our results demonstrate that gamma irradiation alters neurotransmitter-evoked responses, indicating synapses are vulnerable targets of ionizing radiation. Discussion The current study provides new insights into ionizing radiation-induced disruption of physiological neurotransmitter signaling, which should be considered in preventive therapeutic interventions to reduce risks of neurological deficits after photon therapy.
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Affiliation(s)
- Yi Zhang
- North China Research Institute of Electro-Optics, Beijing, China
| | - Yihao Zhang
- State Key Laboratory of Brain and Cognitive Science, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, China
| | - Cong Shen
- China Electronics Technology Group Corporation No. 45 Research Institute, Beijing, China
| | - Shun Hao
- State Key Laboratory of Brain and Cognitive Science, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, China
| | - Wenlan Duan
- State Key Laboratory of Brain and Cognitive Science, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, China
| | - Li Liu
- State Key Laboratory of Brain and Cognitive Science, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, China
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
| | - Hongying Wei
- State Key Laboratory of Brain and Cognitive Science, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing, China
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3
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Cranial irradiation-induced impairment of axonal transport and sexual function in male rats and imaging of the olfactory pathway by MRI. Neurotoxicology 2022; 91:119-127. [DOI: 10.1016/j.neuro.2022.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 04/27/2022] [Accepted: 05/09/2022] [Indexed: 11/21/2022]
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Narasimhamurthy RK, Mumbrekar KD, Satish Rao BS. Effects of low dose ionizing radiation on the brain- a functional, cellular, and molecular perspective. Toxicology 2021; 465:153030. [PMID: 34774978 DOI: 10.1016/j.tox.2021.153030] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/16/2021] [Accepted: 11/08/2021] [Indexed: 02/08/2023]
Abstract
Over the years, the advancement of radio diagnostic imaging tools and techniques has radically improved the diagnosis of different pathophysiological conditions, accompanied by increased exposure to low-dose ionizing radiation. Though the consequences of high dose radiation exposure on humans are very well comprehended, the more publicly relevant effects of low dose radiation (LDR) (≤100 mGy) exposure on the biological system remain ambiguous. The central nervous system, predominantly the developing brain with more neuronal precursor cells, is exceptionally radiosensitive and thus more liable to neurological insult even at low doses, as shown through several rodent studies. Further molecular studies have unraveled the various inflammatory and signaling mechanisms involved in cellular damage and repair that drive these physiological alterations that lead to functional alterations. Interestingly, few studies also claim that LDR exerts therapeutic effects on the brain by initiating an adaptive response. The present review summarizes the current understanding of the effects of low dose radiation at functional, cellular, and molecular levels and the various risks and benefits associated with it based on the evidence available from in vitro, in vivo, and clinical studies. Although the consensus indicates minimum consequences, the overall evidence suggests that LDR can bring about considerable neurological effects in the exposed individual, and hence a re-evaluation of the LDR usage levels and frequency of exposure is required.
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Affiliation(s)
- Rekha K Narasimhamurthy
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
| | - Kamalesh D Mumbrekar
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
| | - B S Satish Rao
- Research Directorate Office, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
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Abstract
PURPOSE The aim of this article is to describe the technical development in proteomics during the last two decades with the focus on its use in radiation biology. It is written from a subjective point of view and aims not to be a scientific review of the subject. CONCLUSION Proteomics is a fast developing technique and it has already contributed greatly to our understanding of biological mechanisms following radiation exposure. Novel proteomics approaches can be used in adequately designed cellular and animal experiments and above all in big clinical trials to investigate effects of ionizing radiation in the future.
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Affiliation(s)
- Soile Tapio
- Institute of Radiation Biology and Institute for Biological and Medical Imaging, Helmholtz Center Munich, German Research Center for Environmental Health GmbH, Neuherberg, Germany
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6
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Out-of-Field Hippocampus from Partial-Body Irradiated Mice Displays Changes in Multi-Omics Profile and Defects in Neurogenesis. Int J Mol Sci 2021; 22:ijms22084290. [PMID: 33924260 PMCID: PMC8074756 DOI: 10.3390/ijms22084290] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/15/2021] [Accepted: 04/15/2021] [Indexed: 12/11/2022] Open
Abstract
The brain undergoes ionizing radiation exposure in many clinical situations, particularly during radiotherapy for brain tumors. The critical role of the hippocampus in the pathogenesis of radiation-induced neurocognitive dysfunction is well recognized. The goal of this study is to test the potential contribution of non-targeted effects in the detrimental response of the hippocampus to irradiation and to elucidate the mechanisms involved. C57Bl/6 mice were whole body (WBI) or partial body (PBI) irradiated with 0.1 or 2.0 Gy of X-rays or sham irradiated. PBI consisted of the exposure of the lower third of the mouse body, whilst the upper two thirds were shielded. Hippocampi were collected 15 days or 6 months post-irradiation and a multi-omics approach was adopted to assess the molecular changes in non-coding RNAs, proteins and metabolic levels, as well as histological changes in the rate of hippocampal neurogenesis. Notably, at 2.0 Gy the pattern of early molecular and histopathological changes induced in the hippocampus at 15 days following PBI were similar in quality and quantity to the effects induced by WBI, thus providing a proof of principle of the existence of out-of-target radiation response in the hippocampus of conventional mice. We detected major alterations in DAG/IP3 and TGF-β signaling pathways as well as in the expression of proteins involved in the regulation of long-term neuronal synaptic plasticity and synapse organization, coupled with defects in neural stem cells self-renewal in the hippocampal dentate gyrus. However, compared to the persistence of the WBI effects, most of the PBI effects were only transient and tended to decrease at 6 months post-irradiation, indicating important mechanistic difference. On the contrary, at low dose we identified a progressive accumulation of molecular defects that tended to manifest at later post-irradiation times. These data, indicating that both targeted and non-targeted radiation effects might contribute to the pathogenesis of hippocampal radiation-damage, have general implications for human health.
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7
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Combined Treatment with Low-Dose Ionizing Radiation and Ketamine Induces Adverse Changes in CA1 Neuronal Structure in Male Murine Hippocampi. Int J Mol Sci 2019; 20:ijms20236103. [PMID: 31817026 PMCID: PMC6929167 DOI: 10.3390/ijms20236103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/29/2019] [Accepted: 12/02/2019] [Indexed: 12/13/2022] Open
Abstract
In children, ketamine sedation is often used during radiological procedures. Combined exposure of ketamine and radiation at doses that alone did not affect learning and memory induced permanent cognitive impairment in mice. The aim of this study was to elucidate the mechanism behind this adverse outcome. Neonatal male NMRI mice were administered ketamine (7.5 mg kg−1) and irradiated (whole-body, 100 mGy or 200 mGy, 137Cs) one hour after ketamine exposure on postnatal day 10. The control mice were injected with saline and sham-irradiated. The hippocampi were analyzed using label-free proteomics, immunoblotting, and Golgi staining of CA1 neurons six months after treatment. Mice co-exposed to ketamine and low-dose radiation showed alterations in hippocampal proteins related to neuronal shaping and synaptic plasticity. The expression of brain-derived neurotrophic factor, activity-regulated cytoskeleton-associated protein, and postsynaptic density protein 95 were significantly altered only after the combined treatment (100 mGy or 200 mGy combined with ketamine, respectively). Increased numbers of basal dendrites and branching were observed only after the co-exposure, thereby constituting a possible reason for the displayed alterations in behavior. These data suggest that the risk of radiation-induced neurotoxic effects in the pediatric population may be underestimated if based only on the radiation dose.
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8
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Hladik D, Dalke C, von Toerne C, Hauck SM, Azimzadeh O, Philipp J, Ung MC, Schlattl H, Rößler U, Graw J, Atkinson MJ, Tapio S. CREB Signaling Mediates Dose-Dependent Radiation Response in the Murine Hippocampus Two Years after Total Body Exposure. J Proteome Res 2019; 19:337-345. [DOI: 10.1021/acs.jproteome.9b00552] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Daniela Hladik
- Institute of Radiation Biology, Helmholtz Zentrum München GmbH, German Research Center for Environmental Health GmbH (HMGU), 85764 Neuherberg, Germany
- Technical University Munich (TUM), 80333 Munich, Germany
| | - Claudia Dalke
- Institute of Developmental Genetics, HMGU, 85764 Neuherberg, Germany
| | | | | | - Omid Azimzadeh
- Institute of Radiation Biology, Helmholtz Zentrum München GmbH, German Research Center for Environmental Health GmbH (HMGU), 85764 Neuherberg, Germany
| | - Jos Philipp
- Institute of Radiation Biology, Helmholtz Zentrum München GmbH, German Research Center for Environmental Health GmbH (HMGU), 85764 Neuherberg, Germany
| | - Marie-Claire Ung
- Institute of Developmental Genetics, HMGU, 85764 Neuherberg, Germany
| | - Helmut Schlattl
- Research Unit Medical Radiation Physics and Diagnostics, HMGU, 85764 Neuherberg, Germany
| | - Ute Rößler
- Federal Office for Radiation Protection, Department SG Radiation Protection and Health, 85764 Oberschleißheim, Germany
| | - Jochen Graw
- Institute of Developmental Genetics, HMGU, 85764 Neuherberg, Germany
| | - Michael J. Atkinson
- Institute of Radiation Biology, Helmholtz Zentrum München GmbH, German Research Center for Environmental Health GmbH (HMGU), 85764 Neuherberg, Germany
- Technical University Munich (TUM), 80333 Munich, Germany
| | - Soile Tapio
- Institute of Radiation Biology, Helmholtz Zentrum München GmbH, German Research Center for Environmental Health GmbH (HMGU), 85764 Neuherberg, Germany
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9
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Fan PC, Zhang Y, Wang Y, Wei W, Zhou YX, Xie Y, Wang X, Qi YZ, Chang L, Jia ZP, Zhou Z, Guan H, Zhang H, Xu P, Zhou PK. Quantitative proteomics reveals mitochondrial respiratory chain as a dominant target for carbon ion radiation: Delayed reactive oxygen species generation caused DNA damage. Free Radic Biol Med 2019; 130:436-445. [PMID: 30395972 DOI: 10.1016/j.freeradbiomed.2018.10.449] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 10/27/2018] [Accepted: 10/29/2018] [Indexed: 01/09/2023]
Abstract
Heavy ion radiotherapy has shown great promise for cancer therapy. Understanding the cellular response mechanism to heavy ion radiation is required to explore measures of overcoming devastating side effects. Here, we performed a quantitative proteomic analysis to investigate the mechanism of carbon ion irradiation on human AHH-1 lymphoblastoid cells. We identified 4602 proteins and quantified 4569 proteins showing high coverage in the mitochondria. Data are available via ProteomeXchange with identifier PXD008351. After stringent filtering, 290 proteins were found to be significantly up-regulated and 16 proteins were down-regulated. Functional analysis revealed that these up-regulated proteins were enriched in the process of DNA damage repair, mitochondrial ribosome, and particularly mitochondrial respiratory chain, accounting for approximately 50% of the accumulated proteins. Bioinformatics and functional analysis demonstrated that these up-regulated mitochondrial respiratory chain proteins enhanced ATP production and simultaneously reactive oxygen species release. More importantly, increased reactive oxygen species led to secondary organelle injury and lagged DNA double-strand breaks. Consistently, the expression of antioxidant enzymes was up-regulated for free radical scavenging. The mechanism of lagged secondary injury originated from disturbances in the mitochondrial respiratory chain. Our results provided a novel target for cell self-repair against heavy ion radiation-induced cellular damage.
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Affiliation(s)
- Peng-Cheng Fan
- State Key Laboratory of Proteomics, National Center for Protein Sciences Beijing, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing102206, China; Beijing Key Laboratory for Radiobiology, Department of Radiation Toxicology and Oncology, Beijing Institute of Radiation Medicine, Beijing 100850, China; Key Laboratory of the Plateau of Environmental Damage Control, General Hospital of Lanzhou, Lanzhou 730050, China
| | - Yao Zhang
- State Key Laboratory of Proteomics, National Center for Protein Sciences Beijing, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing102206, China; State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, College of Ecology and Evolution, Sun Yat-Sen University, Guangzhou 510275, China
| | - Yu Wang
- Beijing Key Laboratory for Radiobiology, Department of Radiation Toxicology and Oncology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Wei Wei
- State Key Laboratory of Proteomics, National Center for Protein Sciences Beijing, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing102206, China
| | - Yan-Xia Zhou
- State Key Laboratory of Proteomics, National Center for Protein Sciences Beijing, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing102206, China
| | - Yi Xie
- Department of Heavy Ion Radiation Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Xin Wang
- Key Laboratory of the Plateau of Environmental Damage Control, General Hospital of Lanzhou, Lanzhou 730050, China
| | - Ying-Zi Qi
- State Key Laboratory of Proteomics, National Center for Protein Sciences Beijing, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing102206, China
| | - Lei Chang
- State Key Laboratory of Proteomics, National Center for Protein Sciences Beijing, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing102206, China
| | - Zheng-Ping Jia
- Key Laboratory of the Plateau of Environmental Damage Control, General Hospital of Lanzhou, Lanzhou 730050, China
| | - Zhe Zhou
- Beijing Key Laboratory for Radiobiology, Department of Radiation Toxicology and Oncology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Hua Guan
- Beijing Key Laboratory for Radiobiology, Department of Radiation Toxicology and Oncology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Hong Zhang
- Department of Heavy Ion Radiation Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Ping Xu
- State Key Laboratory of Proteomics, National Center for Protein Sciences Beijing, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing102206, China; Key Laboratory of Combinatorial Biosynthesis and Drug Discovery of Ministry of Education, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China.
| | - Ping-Kun Zhou
- Beijing Key Laboratory for Radiobiology, Department of Radiation Toxicology and Oncology, Beijing Institute of Radiation Medicine, Beijing 100850, China.
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10
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Xie H, Huang H, Tang M, Wu Y, Huang R, Liu Z, Zhou M, Liao W, Zhou J. iTRAQ-Based Quantitative Proteomics Suggests Synaptic Mitochondrial Dysfunction in the Hippocampus of Rats Susceptible to Chronic Mild Stress. Neurochem Res 2018; 43:2372-2383. [PMID: 30350262 DOI: 10.1007/s11064-018-2664-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 09/02/2018] [Accepted: 10/15/2018] [Indexed: 11/30/2022]
Abstract
Mounting studies show that hippocampal synaptic transmission and plasticity are abnormal in depression. It has been suggested that impairment of synaptic mitochondrial functions potentially occurs in the hippocampus. Thus, the synaptic mitochondria may be a crucial therapeutic target in the course of depression. Here, we investigated the potential dysregulation of synaptic mitochondrial proteins in the hippocampus of a chronic mild stress (CMS) rat model. Proteomic changes of hippocampal synaptosomes containing synaptic mitochondria were quantitatively examined using the isobaric tag for relative and absolute quantitation labeling combined with tandem mass spectrometry. 45 Proteins were identified to be differentially expressed, of which 21 were found to be putative synaptic mitochondrial proteins based on gene ontology component and SynaptomeDB analyses. Detailed investigations of protein functions and disease relevance support the importance of hippocampal synaptic mitochondria as a key substrate contributing to impairment in synaptic plasticity of stress-related disorders. Interestingly, eight synaptic mitochondrial proteins were specifically associated to the susceptible group, and might represent part of molecular basis of depression. Further analysis indicated that the synaptic mitochondrial oxidative phosphorylation (OXPHOS) system was heavily affected by CMS in the susceptible rats. The present results provide novel insights into the disease mechanism underlying the abnormal OXPHOS that is responsible for energy-demanding synaptic plasticity, and thereby increase our understanding of the role of hippocampal synaptic mitochondrial dysfunction in depression.
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Affiliation(s)
- Hong Xie
- Department of Pharmacy, The Fifth People's Hospital of Chongqing, Chongqing, 400062, China.,Institute of Neuroscience, Chongqing Medical University, No. 1 Yixue Road, Yuzhong District, Chongqing, 400016, China.,Chongqing Key Laboratory of Neurobiology, Chongqing, 400016, China
| | - Haojun Huang
- Institute of Neuroscience, Chongqing Medical University, No. 1 Yixue Road, Yuzhong District, Chongqing, 400016, China.,Chongqing Key Laboratory of Neurobiology, Chongqing, 400016, China
| | - Min Tang
- Institute of Neuroscience, Chongqing Medical University, No. 1 Yixue Road, Yuzhong District, Chongqing, 400016, China.,Chongqing Key Laboratory of Neurobiology, Chongqing, 400016, China
| | - Yan Wu
- Institute of Neuroscience, Chongqing Medical University, No. 1 Yixue Road, Yuzhong District, Chongqing, 400016, China.,Chongqing Key Laboratory of Neurobiology, Chongqing, 400016, China
| | - Rongzhong Huang
- ChuangXu Institute of Life Science, Chongqing, 400016, China
| | - Zhao Liu
- Institute of Neuroscience, Chongqing Medical University, No. 1 Yixue Road, Yuzhong District, Chongqing, 400016, China.,Chongqing Key Laboratory of Neurobiology, Chongqing, 400016, China
| | - Mi Zhou
- Institute of Neuroscience, Chongqing Medical University, No. 1 Yixue Road, Yuzhong District, Chongqing, 400016, China.,Chongqing Key Laboratory of Neurobiology, Chongqing, 400016, China
| | - Wei Liao
- Institute of Neuroscience, Chongqing Medical University, No. 1 Yixue Road, Yuzhong District, Chongqing, 400016, China.,Chongqing Key Laboratory of Neurobiology, Chongqing, 400016, China
| | - Jian Zhou
- Institute of Neuroscience, Chongqing Medical University, No. 1 Yixue Road, Yuzhong District, Chongqing, 400016, China. .,Chongqing Key Laboratory of Neurobiology, Chongqing, 400016, China.
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11
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Averbeck D, Salomaa S, Bouffler S, Ottolenghi A, Smyth V, Sabatier L. Progress in low dose health risk research. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2018; 776:46-69. [DOI: 10.1016/j.mrrev.2018.04.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 04/11/2018] [Accepted: 04/12/2018] [Indexed: 12/11/2022]
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12
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Kempf SJ, Janik D, Barjaktarovic Z, Braga-Tanaka I, Tanaka S, Neff F, Saran A, Larsen MR, Tapio S. Chronic low-dose-rate ionising radiation affects the hippocampal phosphoproteome in the ApoE-/- Alzheimer's mouse model. Oncotarget 2018; 7:71817-71832. [PMID: 27708245 PMCID: PMC5342125 DOI: 10.18632/oncotarget.12376] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 09/20/2016] [Indexed: 12/22/2022] Open
Abstract
Accruing data indicate that radiation-induced consequences resemble pathologies of neurodegenerative diseases such as Alzheimer´s. The aim of this study was to elucidate the effect on hippocampus of chronic low-dose-rate radiation exposure (1 mGy/day or 20 mGy/day) given over 300 days with cumulative doses of 0.3 Gy and 6.0 Gy, respectively. ApoE deficient mutant C57Bl/6 mouse was used as an Alzheimer´s model. Using mass spectrometry, a marked alteration in the phosphoproteome was found at both dose rates. The radiation-induced changes in the phosphoproteome were associated with the control of synaptic plasticity, calcium-dependent signalling and brain metabolism. An inhibition of CREB signalling was found at both dose rates whereas Rac1-Cofilin signalling was found activated only at the lower dose rate. Similarly, the reduction in the number of activated microglia in the molecular layer of hippocampus that paralleled with reduced levels of TNFα expression and lipid peroxidation was significant only at the lower dose rate. Adult neurogenesis, investigated by Ki67, GFAP and NeuN staining, and cell death (activated caspase-3) were not influenced at any dose or dose rate. This study shows that several molecular targets induced by chronic low-dose-rate radiation overlap with those of Alzheimer´s pathology. It may suggest that ionising radiation functions as a contributing risk factor to this neurodegenerative disease.
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Affiliation(s)
- Stefan J Kempf
- Institute of Radiation Biology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany.,Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Dirk Janik
- Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany
| | - Zarko Barjaktarovic
- Institute of Radiation Biology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany
| | | | | | - Frauke Neff
- Institute of Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany
| | - Anna Saran
- Laboratory of Biomedical Technologies, Agenzia Nazionale per le Nuove Tecnologie, l´Energia e lo Sviluppo Economico Sostenibile (ENEA), Rome, Italy
| | - Martin R Larsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Soile Tapio
- Institute of Radiation Biology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany
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13
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Age-related effects of X-ray irradiation on mouse hippocampus. Oncotarget 2018; 7:28040-58. [PMID: 27057631 PMCID: PMC5053708 DOI: 10.18632/oncotarget.8575] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 03/27/2016] [Indexed: 12/31/2022] Open
Abstract
Therapeutic irradiation of pediatric and adult patients can profoundly affect adult neurogenesis, and cognitive impairment manifests as a deficit in hippocampal-dependent functions. Age plays a major role in susceptibility to radiation, and younger children are at higher risk of cognitive decay when compared to adults. Cranial irradiation affects hippocampal neurogenesis by induction of DNA damage in neural progenitors, through the disruption of the neurogenic microenvironment, and defective integration of newborn neurons into the neuronal network. Our goal here was to assess cellular and molecular alterations induced by cranial X-ray exposure to low/moderate doses (0.1 and 2 Gy) in the hippocampus of mice irradiated at the postnatal ages of day 10 or week 10, as well as the dependency of these phenomena on age at irradiation. To this aim, changes in the cellular composition of the dentate gyrus, mitochondrial functionality, proteomic profile in the hippocampus, as well as cognitive performance were evaluated by a multidisciplinary approach. Our results suggest the induction of specific alterations in hippocampal neurogenesis, microvascular density and mitochondrial functions, depending on age at irradiation. A better understanding of how irradiation impairs hippocampal neurogenesis at low and moderate doses is crucial to minimize adverse effects of therapeutic irradiation, contributing also to radiation safety regulations.
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Burns TC, Awad AJ, Li MD, Grant GA. Radiation-induced brain injury: low-hanging fruit for neuroregeneration. Neurosurg Focus 2017; 40:E3. [PMID: 27132524 DOI: 10.3171/2016.2.focus161] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Brain radiation is a fundamental tool in neurooncology to improve local tumor control, but it leads to profound and progressive impairments in cognitive function. Increased attention to quality of life in neurooncology has accelerated efforts to understand and ameliorate radiation-induced cognitive sequelae. Such progress has coincided with a new understanding of the role of CNS progenitor cell populations in normal cognition and in their potential utility for the treatment of neurological diseases. The irradiated brain exhibits a host of biochemical and cellular derangements, including loss of endogenous neurogenesis, demyelination, and ablation of endogenous oligodendrocyte progenitor cells. These changes, in combination with a state of chronic neuroinflammation, underlie impairments in memory, attention, executive function, and acquisition of motor and language skills. Animal models of radiation-induced brain injury have demonstrated a robust capacity of both neural stem cells and oligodendrocyte progenitor cells to restore cognitive function after brain irradiation, likely through a combination of cell replacement and trophic effects. Oligodendrocyte progenitor cells exhibit a remarkable capacity to migrate, integrate, and functionally remyelinate damaged white matter tracts in a variety of preclinical models. The authors here critically address the opportunities and challenges in translating regenerative cell therapies from rodents to humans. Although valiant attempts to translate neuroprotective therapies in recent decades have almost uniformly failed, the authors make the case that harnessing human radiation-induced brain injury as a scientific tool represents a unique opportunity to both successfully translate a neuroregenerative therapy and to acquire tools to facilitate future restorative therapies for human traumatic and degenerative diseases of the central nervous system.
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Affiliation(s)
- Terry C Burns
- Department of Neurosurgery and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California
| | - Ahmed J Awad
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, New York;,Faculty of Medicine and Health Sciences, An-Najah National University, Nablus, Palestine; and
| | - Matthew D Li
- Stanford University School of Medicine, Stanford, California
| | - Gerald A Grant
- Department of Neurosurgery and Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California
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15
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Risk of defeats in the central nervous system during deep space missions. Neurosci Biobehav Rev 2016; 71:621-632. [DOI: 10.1016/j.neubiorev.2016.10.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 10/06/2016] [Accepted: 10/11/2016] [Indexed: 02/04/2023]
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16
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Effects of ionizing radiation on the mammalian brain. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2016; 770:219-230. [DOI: 10.1016/j.mrrev.2016.08.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 08/11/2016] [Accepted: 08/12/2016] [Indexed: 11/21/2022]
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In-Utero Low-Dose Irradiation Leads to Persistent Alterations in the Mouse Heart Proteome. PLoS One 2016; 11:e0156952. [PMID: 27276052 PMCID: PMC4898684 DOI: 10.1371/journal.pone.0156952] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 05/23/2016] [Indexed: 02/07/2023] Open
Abstract
Prenatal exposure to stress such as increased level of reactive oxygen species or antiviral therapy are known factors leading to adult heart defects. The risks following a radiation exposure during fetal period are unknown, as are the mechanisms of any potential cardiac damage. The aim of this study was to gather evidence for possible damage by investigating long-term changes in the mouse heart proteome after prenatal exposure to low and moderate radiation doses. Pregnant C57Bl/6J mice received on embryonic day 11 (E11) a single total body dose of ionizing radiation that ranged from 0.02 Gy to 1.0 Gy. The offspring were sacrificed at the age of 6 months or 2 years. Quantitative proteomic analysis of heart tissue was performed using Isotope Coded Protein Label technology and tandem mass spectrometry. The proteomics data were analyzed by bioinformatics and key changes were validated by immunoblotting. Persistent changes were observed in the expression of proteins representing mitochondrial respiratory complexes, redox and heat shock response, and the cytoskeleton, even at the low dose of 0.1 Gy. The level of total and active form of the kinase MAP4K4 that is essential for the embryonic development of mouse heart was persistently decreased at the radiation dose of 1.0 Gy. This study provides the first insight into the molecular mechanisms of cardiac impairment induced by ionizing radiation exposure during the prenatal period.
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Lorat Y, Schanz S, Rübe CE. Ultrastructural Insights into the Biological Significance of Persisting DNA Damage Foci after Low Doses of Ionizing Radiation. Clin Cancer Res 2016; 22:5300-5311. [PMID: 27199493 DOI: 10.1158/1078-0432.ccr-15-3081] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 05/07/2016] [Indexed: 11/16/2022]
Abstract
PURPOSE Intensity-modulated radiotherapy (IMRT) enables the delivery of high doses to target volume while sparing surrounding nontargeted tissues. IMRT treatment, however, substantially increases the normal tissue volume receiving low-dose irradiation, but the biologic consequences are unclear. EXPERIMENTAL DESIGN Using mouse strains that varied in genetic DNA repair capacity, we investigated the DNA damage response of cortical neurons during daily low-dose irradiation (0.1 Gy). Using light and electron microscopic approaches, we enumerated and characterized DNA damage foci as marker for double-strand breaks (DSBs). RESULTS During repeated low-dose irradiation, cortical neurons in brain tissues of all mouse strains had a significant increase of persisting foci with cumulative doses, with the most pronounced accumulation of large-sized foci in repair-deficient mice. Electron microscopic analysis revealed that persisting foci in repair-proficient neurons reflect chromatin alterations in heterochromatin, but not persistently unrepaired DSBs. Repair-deficient SCID neurons, by contrast, showed high numbers of unrepaired DSBs in eu- and heterochromatin, emphasizing the fundamental role of DNA-PKcs in DSB rejoining, independent of chromatin status. In repair-deficient ATM-/- neurons, large persisting damage foci reflect multiple unrepaired DSBs concentrated at the boundary of heterochromatin due to disturbed KAP1 phosphorylation. CONCLUSION Repeated low-dose irradiation leads to the accumulation of persisting DNA damage foci in cortical neurons and thus may adversely affect brain tissue and increase the risk of carcinogenesis. Multiple unrepaired DSBs account for large-sized foci in repair-deficient neurons, thus quantifying foci alone may underestimate extent and complexity of persistent DNA damage. Clin Cancer Res; 22(21); 5300-11. ©2016 AACR.
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Affiliation(s)
- Yvonne Lorat
- Department of Radiation Oncology, Saarland University, Homburg, Saarland, Germany
| | - Stefanie Schanz
- Department of Radiation Oncology, Saarland University, Homburg, Saarland, Germany
| | - Claudia E Rübe
- Department of Radiation Oncology, Saarland University, Homburg, Saarland, Germany.
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Karapiperis C, Kempf SJ, Quintens R, Azimzadeh O, Vidal VL, Pazzaglia S, Bazyka D, Mastroberardino PG, Scouras ZG, Tapio S, Benotmane MA, Ouzounis CA. Brain Radiation Information Data Exchange (BRIDE): integration of experimental data from low-dose ionising radiation research for pathway discovery. BMC Bioinformatics 2016; 17:212. [PMID: 27170263 PMCID: PMC4865096 DOI: 10.1186/s12859-016-1068-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 04/21/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The underlying molecular processes representing stress responses to low-dose ionising radiation (LDIR) in mammals are just beginning to be understood. In particular, LDIR effects on the brain and their possible association with neurodegenerative disease are currently being explored using omics technologies. RESULTS We describe a light-weight approach for the storage, analysis and distribution of relevant LDIR omics datasets. The data integration platform, called BRIDE, contains information from the literature as well as experimental information from transcriptomics and proteomics studies. It deploys a hybrid, distributed solution using both local storage and cloud technology. CONCLUSIONS BRIDE can act as a knowledge broker for LDIR researchers, to facilitate molecular research on the systems biology of LDIR response in mammals. Its flexible design can capture a range of experimental information for genomics, epigenomics, transcriptomics, and proteomics. The data collection is available at: .
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Affiliation(s)
- Christos Karapiperis
- Department of Genetics, Development & Molecular Biology, School of Biology, Aristotle University of Thessalonica, 54124, Thessalonica, Greece
| | - Stefan J Kempf
- Institute of Radiation Biology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, 85764, Neuherberg, Germany
- Present address: Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark
| | - Roel Quintens
- Radiobiology Unit, Belgian Nuclear Research Centre (SCK•CEN), B-2400, Mol, Belgium
| | - Omid Azimzadeh
- Institute of Radiation Biology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, 85764, Neuherberg, Germany
| | - Victoria Linares Vidal
- School of Medicine, IISPV, "Rovira i Virgili" University, Sant Llorens 21, 43201, Reus, Spain
| | - Simonetta Pazzaglia
- Laboratory of Radiation Biology & Biomedicine, Agenzia Nazionale per le Nuove Tecnologie, l'Energia e lo Sviluppo Economico Sostenibile (ENEA) Centro Ricerche Casaccia, 00123, Rome, Italy
| | - Dimitry Bazyka
- National Research Center for Radiation Medicine of the National Academy of Medical Sciences of Ukraine, Melnykov str. 53, Kyiv, 04050, Ukraine
| | | | - Zacharias G Scouras
- Department of Genetics, Development & Molecular Biology, School of Biology, Aristotle University of Thessalonica, 54124, Thessalonica, Greece
| | - Soile Tapio
- Institute of Radiation Biology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, 85764, Neuherberg, Germany.
| | | | - Christos A Ouzounis
- Department of Genetics, Development & Molecular Biology, School of Biology, Aristotle University of Thessalonica, 54124, Thessalonica, Greece.
- Biological Process & Computation Laboratory (BCPL), Chemical Process & Energy Resources Institute (CPERI), Centre for Research & Technology Hellas (CERTH), Thessalonica, 57001, Greece.
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Buratovic S, Stenerlöw B, Fredriksson A, Sundell-Bergman S, Eriksson P. Developmental effects of fractionated low-dose exposure to gamma radiation on behaviour and susceptibility of the cholinergic system in mice. Int J Radiat Biol 2016; 92:371-9. [PMID: 27043364 DOI: 10.3109/09553002.2016.1164911] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
PURPOSE To investigate whether neonatal exposure to fractionated external gamma radiation and co-exposure to radiation and nicotine can affect/exacerbate developmental neurotoxic effects, including altered behavior/cognitive function and the susceptibility of the cholinergic system in adult male mice. MATERIALS AND METHODS Neonatal male Naval Medical Research Institute (NMRI) mice were irradiated with one 200 mGy fraction/day and/or exposed to nicotine (66 μg/kg b.w.) twice daily on postnatal day (PND) 10, 10-11, 10-12 or 10-13 (nicotine only). At 2 months of age the animals were tested for spontaneous behavior in a novel home environment, habituation capacity and nicotine-induced behavior. RESULTS Fractionated irradiation and co-exposure to radiation and nicotine on three consecutive days disrupted behavior and habituation and altered susceptibility of the cholinergic system. All observed effects were significantly more pronounced in mice co-exposed to both radiation and nicotine. CONCLUSIONS The fractionated irradiation regime affects behavior/cognitive function in a similar manner as has previously been observed for single-dose exposures. Neonatal co-exposure to radiation and nicotine, during a critical period of brain development in general and cholinergic system development in particular, enhance these behavioral defects suggesting that the cholinergic system can be a target system for this type of developmental neurotoxic effects.
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Affiliation(s)
- Sonja Buratovic
- a Department of Environmental Toxicology , Uppsala University , Uppsala, Sweden
| | - Bo Stenerlöw
- b Department of Immunology, Genetics and Pathology , Uppsala University , Uppsala, Sweden
| | - Anders Fredriksson
- a Department of Environmental Toxicology , Uppsala University , Uppsala, Sweden
| | - Synnöve Sundell-Bergman
- c Department of Soil and Environment , Swedish University of Agricultural Sciences , Uppsala , Sweden
| | - Per Eriksson
- a Department of Environmental Toxicology , Uppsala University , Uppsala, Sweden
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Eriksson P, Buratovic S, Fredriksson A, Stenerlöw B, Sundell-Bergman S. Neonatal exposure to whole body ionizing radiation induces adult neurobehavioural defects: Critical period, dose--response effects and strain and sex comparison. Behav Brain Res 2016; 304:11-9. [PMID: 26876140 DOI: 10.1016/j.bbr.2016.02.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 02/03/2016] [Accepted: 02/07/2016] [Indexed: 02/06/2023]
Abstract
Development of the brain includes periods which can be critical for its normal maturation. The present study investigates specifically vulnerable peri-/postnatal periods in mice which are essential for understanding the etiology behind radiation induced neurotoxicity and functional defects, including evaluation of neurotoxicity between sexes or commonly used laboratory mouse strains following low/moderate doses of ionizing radiation (IR). Male Naval Medical Research Institute (NMRI) mice, whole body irradiated to a single 500 mGy IR dose, on postnatal day (PND) 3 or PND 10 showed an altered adult spontaneous behaviour and impaired habituation capacity, whereas irradiation on PND 19 did not have any impact on the studied variables. Both NMRI and C57bl/6 male and female mice showed an altered adult spontaneous behaviour and impaired habituation following a single whole body irradiation of 500 or 1000 mGy, but not after 20 or 100 mGy, on PND 10. The present study shows that exposure to low/moderate doses of IR during critical life stages might be involved in the induction of neurological/neurodegenerative disorder/disease. A specifically vulnerable period for radiation induced neurotoxicity seems to be around PND 3-10 in mice. Further studies are needed to investigate mechanisms involved in induction of developmental neurotoxicity following low-dose irradiation.
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Affiliation(s)
- Per Eriksson
- Department of Environmental Toxicology, Uppsala University, Norbyvägen 18A, SE-75236 Uppsala, Sweden.
| | - Sonja Buratovic
- Department of Environmental Toxicology, Uppsala University, Norbyvägen 18A, SE-75236 Uppsala, Sweden
| | - Anders Fredriksson
- Department of Environmental Toxicology, Uppsala University, Norbyvägen 18A, SE-75236 Uppsala, Sweden
| | - Bo Stenerlöw
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Synnöve Sundell-Bergman
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden
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Kempf SJ, von Toerne C, Hauck SM, Atkinson MJ, Benotmane MA, Tapio S. Long-term consequences of in utero irradiated mice indicate proteomic changes in synaptic plasticity related signalling. Proteome Sci 2015; 13:26. [PMID: 26578848 PMCID: PMC4647474 DOI: 10.1186/s12953-015-0083-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 11/10/2015] [Indexed: 11/21/2022] Open
Abstract
Background The harmful consequences of in utero irradiation on learning and memory have been recognised but the molecular mechanisms behind the damage are still unknown. Results Using a mass spectrometry-based approach, we investigated the long-term changes in the global cortical and hippocampal proteome 6 months after 0.1, 0.5 and 1.0 Gy in utero X-ray irradiation delivered on embryonic day 11 in male C57Bl/6 J offspring. We noted alterations in several signalling pathways involved in cognition, the transcription factor cAMP response element-binding protein (CREB) playing a central role. Immunoblotting of CREB and phosphorylated CREB (Ser133) showed an altered expression profile at all doses in the hippocampus and at 0.5 and 1.0 Gy in the cortex. The greatest reduction in the phospho-CREB level was seen at 1.0 Gy in the hippocampus. It was accompanied by enhanced expression of postsynaptic density protein 95 (PSD95), suggesting effect on synaptic plasticity in neuronal dendrites. Conclusions As the CREB signalling pathway plays a crucial role in neuronal plasticity and long-term memory formation in the brain, the radiation-induced alterations of this pathway seen here are in good agreement with the cognitive dysfunction seen in in utero irradiated populations. These data contribute to a deeper biological understanding of molecular mechanisms behind the long-term damage induced by relatively low doses of ionising radiation during gestation. Electronic supplementary material The online version of this article (doi:10.1186/s12953-015-0083-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Stefan J Kempf
- Institute of Radiation Biology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764 Neuherberg, Germany ; Present address: Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Christine von Toerne
- Research Unit Protein Science, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany
| | - Stefanie M Hauck
- Research Unit Protein Science, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Neuherberg, Germany
| | - Michael J Atkinson
- Institute of Radiation Biology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764 Neuherberg, Germany ; Chair of Radiation Biology, Technical University Munich, Munich, Germany
| | | | - Soile Tapio
- Institute of Radiation Biology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Ingolstaedter Landstrasse 1, 85764 Neuherberg, Germany
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