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Quevarec L, Morran LT, Dufourcq-Sekatcheff E, Armant O, Adam-Guillermin C, Bonzom JM, Réale D. Host defense alteration in Caenorhabditis elegans after evolution under ionizing radiation. BMC Ecol Evol 2024; 24:95. [PMID: 38982371 PMCID: PMC11234525 DOI: 10.1186/s12862-024-02282-7] [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: 01/10/2024] [Accepted: 07/01/2024] [Indexed: 07/11/2024] Open
Abstract
BACKGROUND Adaptation to a stressor can lead to costs on other traits. These costs play an unavoidable role on fitness and influence the evolutionary trajectory of a population. Host defense seems highly subject to these costs, possibly because its maintenance is energetically costly but essential to the survival. When assessing the ecological risk related to pollution, it is therefore relevant to consider these costs to evaluate the evolutionary consequences of stressors on populations. However, to the best of our knowledge, the effects of evolution in irradiate environment on host defense have never been studied. Using an experimental evolution approach, we analyzed fitness across 20 transfers (about 20 generations) in Caenorhabditis elegans populations exposed to 0, 1.4, and 50.0 mGy.h- 1 of 137Cs gamma radiation. Then, populations from transfer 17 were placed in the same environmental conditions without irradiation (i.e., common garden) for about 10 generations before being exposed to the bacterial parasite Serratia marcescens and their survival was estimated to study host defense. Finally, we studied the presence of an evolutionary trade-off between fitness of irradiated populations and host defense. RESULTS We found a lower fitness in both irradiated treatments compared to the control ones, but fitness increased over time in the 50.0 mGy.h- 1, suggesting a local adaptation of the populations. Then, the survival rate of C. elegans to S. marcescens was lower for common garden populations that had previously evolved under both irradiation treatments, indicating that evolution in gamma-irradiated environment had a cost on host defense of C. elegans. Furthermore, we showed a trade-off between standardized fitness at the end of the multigenerational experiment and survival of C. elegans to S. marcescens in the control treatment, but a positive correlation between the two traits for the two irradiated treatments. These results indicate that among irradiated populations, those most sensitive to ionizing radiation are also the most susceptible to the pathogen. On the other hand, other irradiated populations appear to have evolved cross-resistance to both stress factors. CONCLUSIONS Our study shows that adaptation to an environmental stressor can be associated with an evolutionary cost when a new stressor appears, even several generations after the end of the first stressor. Among irradiated populations, we observed an evolution of resistance to ionizing radiation, which also appeared to provide an advantage against the pathogen. On the other hand, some of the irradiated populations seemed to accumulate sensitivities to stressors. This work provides a new argument to show the importance of considering evolutionary changes in ecotoxicology and for ecological risk assessment.
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Affiliation(s)
- Loïc Quevarec
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SERPEN/LECO, Cadarache, Saint Paul Lez Durance, 13115, France.
| | - Levi T Morran
- Department of Biology, Emory University, Atlanta, GA, 30322, USA
| | - Elizabeth Dufourcq-Sekatcheff
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SERPEN/LECO, Cadarache, Saint Paul Lez Durance, 13115, France
| | - Olivier Armant
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SERPEN/LECO, Cadarache, Saint Paul Lez Durance, 13115, France
| | - Christelle Adam-Guillermin
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-SANTE/SDOS/LMDN, Cadarache, Saint Paul Lez Durance, 13115, France
| | - Jean-Marc Bonzom
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SERPEN/LECO, Cadarache, Saint Paul Lez Durance, 13115, France
| | - Denis Réale
- Département des sciences biologiques, Université du Québec à Montréal, Montréal, QC, Canada
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Kilic G, Debisarun PA, Alaswad A, Baltissen MP, Lamers LA, de Bree LCJ, Benn CS, Aaby P, Dijkstra H, Lemmers H, Martens JHA, Domínguez-Andrés J, van Crevel R, Li Y, Xu CJ, Netea MG. Seasonal variation in BCG-induced trained immunity. Vaccine 2024:S0264-410X(24)00751-5. [PMID: 38981740 DOI: 10.1016/j.vaccine.2024.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 06/03/2024] [Accepted: 07/02/2024] [Indexed: 07/11/2024]
Abstract
The Bacille Calmette-Guerin (BCG) vaccine is a well-established inducer of innate immune memory (also termed trained immunity), causing increased cytokine production upon heterologous secondary stimulation. Innate immune responses are known to be influenced by season, but whether seasons impact induction of trained immunity is not known. To explore the influence of season on innate immune memory induced by the BCG vaccine, we vaccinated healthy volunteers with BCG either during winter or spring. Three months later, we measured the ex vivo cytokine responses against heterologous stimuli, analyzed gene expressions and epigenetic signatures of the immune cells, and compared these with the baseline before vaccination. BCG vaccination during winter induced a stronger increase in the production of pro-inflammatory cytokines by peripheral blood mononuclear cells (PBMCs) upon stimulation with different bacterial and fungal stimuli, compared to BCG vaccination in spring. In contrast, winter BCG vaccination resulted in lower IFNγ release in PBMCs compared to spring BCG vaccination. Furthermore, NK cells of the winter-vaccinated people had a greater pro-inflammatory cytokine and IFNγ production capacity upon heterologous stimulation. BCG had only minor effects on the transcriptome of monocytes 3 months later. In contrast, we identified season-dependent epigenetic changes in monocytes and NK cells induced by vaccination, partly explaining the higher immune cell reactivity in the winter BCG vaccination group. These results suggest that BCG vaccination during winter is more prone to induce a robust trained immunity response by activating and reprogramming the immune cells, especially NK cells. (Dutch clinical trial registry no. NL58219.091.16).
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Affiliation(s)
- Gizem Kilic
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Priya A Debisarun
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Ahmed Alaswad
- Centre for Individualised Infection Medicine (CiiM), A Joint Venture between the Helmholtz Centre for Infection Research (HZI) and Hannover Medical School (MHH), Hannover, Germany; TWINCORE, A Joint Venture between the Helmholtz Centre for Infection Research (HZI) and the Hannover Medical School (MHH), Hannover, Germany
| | - Marijke P Baltissen
- Department of Molecular Biology, Faculty of Science, Radboud Institute for Molecular Life Sciences, Oncode Institute, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - Lieke A Lamers
- Department of Molecular Biology, Faculty of Science, Radboud Institute for Molecular Life Sciences, Oncode Institute, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - L Charlotte J de Bree
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Christine S Benn
- Bandim Health Project, Open Patient Data Explorative Network (OPEN), Department of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark; Danish Institute for Advanced Study, University of Southern Denmark, Copenhagen, Denmark
| | - Peter Aaby
- Bandim Health Project, Open Patient Data Explorative Network (OPEN), Department of Clinical Research, Odense University Hospital and University of Southern Denmark, Odense, Denmark
| | - Helga Dijkstra
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Heidi Lemmers
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Joost H A Martens
- Department of Molecular Biology, Faculty of Science, Radboud University Nijmegen, Radboud Institute for Molecular Life Sciences, Nijmegen, the Netherlands
| | - Jorge Domínguez-Andrés
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Reinout van Crevel
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Yang Li
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands; Centre for Individualised Infection Medicine (CiiM), A Joint Venture between the Helmholtz Centre for Infection Research (HZI) and Hannover Medical School (MHH), Hannover, Germany; TWINCORE, A Joint Venture between the Helmholtz Centre for Infection Research (HZI) and the Hannover Medical School (MHH), Hannover, Germany
| | - Cheng-Jian Xu
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands; Centre for Individualised Infection Medicine (CiiM), A Joint Venture between the Helmholtz Centre for Infection Research (HZI) and Hannover Medical School (MHH), Hannover, Germany; TWINCORE, A Joint Venture between the Helmholtz Centre for Infection Research (HZI) and the Hannover Medical School (MHH), Hannover, Germany
| | - Mihai G Netea
- Department of Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands; Department of Immunology and Metabolism, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany.
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Jin Y, Li D, Zheng X, Gao M, Wang W, Zhang X, Kang W, Zhang C, Wu S, Dai R, Zheng Z, Zhang R. A Novel Activatable Nanoradiosensitizer for Second Near-Infrared Fluorescence Imaging-Guided Safe-Dose Synergetic Chemo-Radiotherapy of Rheumatoid Arthritis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308905. [PMID: 38419379 PMCID: PMC11077689 DOI: 10.1002/advs.202308905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 02/15/2024] [Indexed: 03/02/2024]
Abstract
The precise theranostics of rheumatoid arthritis (RA) remains a formidable challenge in clinical practice. Exploring novel applications of contemporary therapeutic approaches like chemo-radiotherapy is promising as a highly effective strategy for RA. Herein, a novel activatable nanoradiosensitizer-40 (denoted as IRnR-40) is developed, based on encapsulating the clinically approved drugs cisplatin (DDP) and indocyanine green (ICG) within a gelatin shell to achieve second near-infrared fluorescence (NIR-II FL) imaging-guided safe-dose synergetic chemo-radiotherapy. The high concentration of matrix metalloproteinase-9 (MMP-9) in the RA microenvironment plays a pivotal role in triggering the responsive degradation of IRnR-40, leading to the rapid release of functional molecules DDP and ICG. The released ICG serves the dual purpose of illuminating the inflamed joints to facilitate accurate target volume delineation for guiding radiotherapy, as well as acting as a real-time reporter for quantifying the release of DDP to monitor efficacy. Meanwhile, the released DDP achieves highly effective synergistic chemotherapy and radiosensitization for RA via the dual reactive oxygen species (ROS)-mediated mitochondrial apoptotic pathway. To sum up, this activatable nanoradiosensitizer IRnR-40 is believed to be the first attempt to achieve efficient NIR-II FL imaging-guided safe-dose chemo-radiotherapy for RA, which provides a new paradigm for precise theranostics of refractory benign diseases.
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Affiliation(s)
- Yarong Jin
- Department of RadiologyFifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital)Taiyuan030000China
| | - Dongsheng Li
- Research Team of Molecular MedicineFirst Hospital of Shanxi Medical UniversityShanxi Medical UniversityTaiyuan030001China
| | - Xiaochun Zheng
- Department of RadiologyFifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital)Taiyuan030000China
| | - Mengting Gao
- Department of RadiologyFifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital)Taiyuan030000China
| | - Wenxuan Wang
- Department of OrthopedicsThird Hospital of Shanxi Medical University (Shanxi Bethune Hospital)Taiyuan030032China
| | - Xin Zhang
- Department of OrthopedicsThird Hospital of Shanxi Medical University (Shanxi Bethune Hospital)Taiyuan030032China
| | - Weiwei Kang
- Department of RadiologyFifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital)Taiyuan030000China
| | - Chongqing Zhang
- Department of RadiologyShanxi Province Cancer Hospital (Shanxi Hospital Affiliated to Cancer HospitalChinese Academy of Medical Sciences/Cancer Hospital Affiliated to Shanxi Medical University)Taiyuan030013China
| | - Shutong Wu
- Department of RadiologyFifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital)Taiyuan030000China
| | - Rong Dai
- Department of RadiologyFifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital)Taiyuan030000China
| | - Ziliang Zheng
- Department of RadiologyFifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital)Taiyuan030000China
- Department of OrthopedicsThird Hospital of Shanxi Medical University (Shanxi Bethune Hospital)Taiyuan030032China
| | - Ruiping Zhang
- Department of RadiologyFifth Hospital of Shanxi Medical University (Shanxi Provincial People's Hospital)Taiyuan030000China
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Chaurasia RK, Sapra BK, Aswal DK. Interplay of immune modulation, adaptive response and hormesis: Suggestive of threshold for clinical manifestation of effects of ionizing radiation at low doses? THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:170178. [PMID: 38280586 DOI: 10.1016/j.scitotenv.2024.170178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 12/26/2023] [Accepted: 01/13/2024] [Indexed: 01/29/2024]
Abstract
The health impacts of low-dose ionizing radiation exposures have been a subject of debate over the last three to four decades. While there has been enough evidence of "no adverse observable" health effects at low doses and low dose rates, the hypothesis of "Linear No Threshold" continues to rule and govern the principles of radiation protection and the formulation of regulations and public policies. In adopting this conservative approach, the role of the biological processes underway in the human body is kept at abeyance. This review consolidates the available studies that discuss all related biological pathways and repair mechanisms that inhibit the progression of deleterious effects at low doses and low dose rates of ionizing radiation. It is pertinent that, taking cognizance of these processes, there is a need to have a relook at policies of radiation protection, which as of now are too stringent, leading to undue economic losses and negative public perception about radiation.
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Affiliation(s)
- R K Chaurasia
- Radiological Physics and Advisory Division, India; Health, Safety and Environment Group,Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India.
| | - B K Sapra
- Radiological Physics and Advisory Division, India; Health, Safety and Environment Group,Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India.
| | - D K Aswal
- Health, Safety and Environment Group,Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India.
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Thariat J, Little MP, Zablotska LB, Samson P, O’Banion MK, Leuraud K, Bergom C, Girault G, Azimzadeh O, Bouffler S, Hamada N. Radiotherapy for non-cancer diseases: benefits and long-term risks. Int J Radiat Biol 2024; 100:505-526. [PMID: 38180039 PMCID: PMC11039429 DOI: 10.1080/09553002.2023.2295966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/29/2023] [Indexed: 01/06/2024]
Abstract
PURPOSE The discovery of X-rays was followed by a variety of attempts to treat infectious diseases and various other non-cancer diseases with ionizing radiation, in addition to cancer. There has been a recent resurgence of interest in the use of such radiotherapy for non-cancer diseases. Non-cancer diseases for which use of radiotherapy has currently been proposed include refractory ventricular tachycardia, neurodegenerative diseases (e.g. Alzheimer's disease and dementia), and Coronavirus Disease 2019 (COVID-19) pneumonia, all with ongoing clinical studies that deliver radiation doses of 0.5-25 Gy in a single fraction or in multiple daily fractions. In addition to such non-cancer effects, historical indications predominantly used in some countries (e.g. Germany) include osteoarthritis and degenerative diseases of the bones and joints. This narrative review gives an overview of the biological rationale and ongoing preclinical and clinical studies for radiotherapy proposed for various non-cancer diseases, discusses the plausibility of the proposed biological rationale, and considers the long-term radiation risks of cancer and non-cancer diseases. CONCLUSIONS A growing body of evidence has suggested that radiation represents a double-edged sword, not only for cancer, but also for non-cancer diseases. At present, clinical evidence has shown some beneficial effects of radiotherapy for ventricular tachycardia, but there is little or no such evidence of radiotherapy for other newly proposed non-cancer diseases (e.g. Alzheimer's disease, COVID-19 pneumonia). Patients with ventricular tachycardia and COVID-19 pneumonia have thus far been treated with radiotherapy when they are an urgent life threat with no efficient alternative treatment, but some survivors may encounter a paradoxical situation where patients were rescued by radiotherapy but then get harmed by radiotherapy. Further studies are needed to justify the clinical use of radiotherapy for non-cancer diseases, and optimize dose to diseased tissue while minimizing dose to healthy tissue.
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Affiliation(s)
- Juliette Thariat
- Department of Radiation Oncology, Comprehensive Cancer Centre François Baclesse, Caen, France
- Laboratoire de Physique Corpusculaire IN2P3, ENSICAEN/CNRS UMR 6534, Normandie Université, Caen, France
| | - Mark P. Little
- Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland, USA
| | - Lydia B. Zablotska
- Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco (UCSF), San Francisco, California, USA
| | - Pamela Samson
- Department of Radiation Oncology, Alvin J. Siteman Cancer Center, Washington University School of Medicine, St. Louis, Missouri, USA
| | - M. Kerry O’Banion
- Department of Neuroscience, Del Monte Institute for Neuroscience, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Klervi Leuraud
- Research Department on Biological and Health Effects of Ionizing Radiation (SESANE), Institute for Radiological Protection and Nuclear Safety (IRSN), Fontenay-aux-Roses, France
| | - Carmen Bergom
- Department of Radiation Oncology, Alvin J. Siteman Cancer Center, Washington University School of Medicine, St. Louis, Missouri, USA
- Cardio-Oncology Center of Excellence, Washington University, St. Louis, Missouri, USA
| | - Gilles Girault
- Comprehensive Cancer Centre François Baclesse, Medical Library, Caen, France
| | - Omid Azimzadeh
- Federal Office for Radiation Protection (BfS), Section Radiation Biology, Neuherberg, Germany
| | - Simon Bouffler
- Radiation Protection Sciences Division, UK Health Security Agency (UKHSA), Chilton, Didcot, UK
| | - Nobuyuki Hamada
- Biology and Environmental Chemistry Division, Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Abiko, Chiba, Japan
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Tang S, Li S, Tang B, Wang X, Xiao Y, Cheke RA. Hormetic and synergistic effects of cancer treatments revealed by modelling combinations of radio - or chemotherapy with immunotherapy. BMC Cancer 2023; 23:1040. [PMID: 37891512 PMCID: PMC10605942 DOI: 10.1186/s12885-023-11542-6] [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: 07/17/2022] [Accepted: 10/06/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Radio/chemotherapy and immune systems provide examples of hormesis, as tumours can be stimulated (or reduced) at low radio/chemical or antibody doses but inhibited (or stimulated) by high doses. METHODS Interactions between effector cells, tumour cells and cytokines with pulsed radio/chemo-immunotherapy were modelled using a pulse differential system. RESULTS Our results show that radio/chemotherapy (dose) response curves (RCRC) and/or immune response curves (IRC) or a combination of both, undergo homeostatic changes or catastrophic shifts revealing hormesis in many parameter regions. Some mixed response curves had multiple humps, posing challenges for interpretation of clinical trials and experimental design, due to a fuzzy region between an hormetic zone and the toxic threshold. Mixed response curves from two parameter bifurcation analyses demonstrated that low-dose radio/chemotherapy and strong immunotherapy counteract side-effects of radio/chemotherapy on effector cells and cytokines and stimulate effects of immunotherapy on tumour growth. The implications for clinical applications were confirmed by good fits to our model of RCRC and IRC data. CONCLUSIONS The combination of low-dose radio/chemotherapy and high-dose immunotherapy is very effective for many solid tumours. The net benefit and synergistic effect of combined therapy is conducive to the treatment and inhibition of tumour cells.
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Affiliation(s)
- Sanyi Tang
- School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, 710119, People's Republic of China
| | - Shuo Li
- School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, 710119, People's Republic of China
| | - Biao Tang
- The Interdisplinary Research Center for Mathematics and Life Sciences, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
| | - Xia Wang
- School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, 710119, People's Republic of China.
| | - Yanni Xiao
- The Interdisplinary Research Center for Mathematics and Life Sciences, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
| | - Robert A Cheke
- Natural Resources Institute, University of Greenwich at Medway, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK
- Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, St Mary's Campus, Norfolk Place, London, W2 1PG, UK
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Karam HM, Galal SM, Lotfy DM. Nrf2 and NF-қB interplay in tamoxifen-induced hepatic toxicity: A promising therapeutic approach of sildenafil and low-dose γ radiation. ENVIRONMENTAL TOXICOLOGY 2023; 38:990-996. [PMID: 36715126 DOI: 10.1002/tox.23742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 12/13/2022] [Accepted: 01/07/2023] [Indexed: 06/18/2023]
Abstract
Tamoxifen-induced hepatotoxicity is an inevitable side effect during breast cancer treatment. Low-dose gamma irradiation (IRR) shows many beneficial effects by stimulating various biological processes. This study evaluates the possible effect of sildenafil and low-dose gamma radiation on liver damages as new treatment strategies. Group I (control), group II: (tamoxifen), group III: (tamoxifen + Sildenafil), group IV: (tamoxifen+ irradiation) and group V: (tamoxifen +Sildenafil + irradiation). Rats were sacrificed after 5 h from tamoxifen injection. Results showed that tamoxifen caused elevation in serum AST, ALT and ALP as well hepatic ROS, iNOS, MDA, Keap-1 and NF-Kb, in addition to diminution in hepatic Nrf2 and HO-1. Exposure to low-dose gamma radiation and sildenafil amended the alterations in the measured parameters in serum and tissue. Moreover, all results were confirmed by histopathological examination. In conclusion, sildenafil and low-dose gamma radiation can mitigate the toxicity induced by tamoxifen in liver tissues. Hence, this treatment could be further evaluated as a new approach for alleviating various liver disorders.
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Affiliation(s)
- Heba M Karam
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Shereen M Galal
- Health Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Dina M Lotfy
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
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Little MP, Zhang W, van Dusen R, Hamada N, Bugden M, Cao M, Thomas K, Li D, Wang Y, Chandrashekhar M, Khan MK, Coleman CN. Low-dose radiotherapy for COVID-19 pneumonia and cancer: summary of a recent symposium and future perspectives. Int J Radiat Biol 2023; 99:357-371. [PMID: 35511152 DOI: 10.1080/09553002.2022.2074165] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The lessons learned from the Coronavirus Disease 2019 (COVID-19) pandemic are numerous. Low dose radiotherapy (LDRT) was used in the pre-antibiotic era as treatment for bacterially/virally associated pneumonia. Motivated in part by these historic clinical and radiobiological data, LDRT for treatment of COVID-19-associated pneumonia was proposed in early 2020. Although there is a large body of epidemiological and experimental data pointing to effects such as cancer at low doses, there is some evidence of beneficial health effects at low doses. It has been hypothesized that low dose radiation could be combined with immune checkpoint therapy to treat cancer. We shall review here some of these old radiobiological and epidemiological data, as well as the newer data on low dose radiation and stimulated immune response and other relevant emerging data. The paper includes a summary of several oral presentations given in a Symposium on "Low dose RT for COVID and other inflammatory diseases" as part of the 67th Annual Meeting of the Radiation Research Society, held virtually 3-6 October 2021.
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Affiliation(s)
- Mark P Little
- Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
| | - Wei Zhang
- Radiation Effects Department, UK Health Security Agency (UKHSA), Chilton, UK
| | - Roy van Dusen
- Information Management Services, Silver Spring, MD, USA
| | - Nobuyuki Hamada
- Biology and Environmental Chemistry Division, Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Komae, Japan
| | - Michelle Bugden
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Meiyun Cao
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Kiersten Thomas
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Deyang Li
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Yi Wang
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada.,Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Megha Chandrashekhar
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Mohammad K Khan
- Department of Radiation Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, USA
| | - C Norman Coleman
- Radiation Research Program, Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
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Janiak MK, Waligórski MPR. Can Low-Level Ionizing Radiation Do Us Any Harm? Dose Response 2023. [DOI: 10.1177/15593258221148013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The current system of radiological protection relies on the linear no-threshold (LNT) hypothesis of cancer risk due to humans being exposed to ionizing radiation (IR). Under this tenet, effects of low doses (i.e. of those not exceeding 100 mGy or 0.1 mGy/min. of X- or γ-rays for acute and chronic exposures, respectively) are evaluated by downward linear extrapolation from regions of higher doses and dose rates where harmful effects are actually observed. However, evidence accumulated over many years clearly indicates that exposure of humans to low doses of radiation does not cause any harm and often promotes health. In this review, we discuss results of some epidemiological analyses, clinical trials and controlled experimental animal studies. Epidemiological data indicate the presence of a threshold and departure from linearity at the lowest dose ranges. Experimental studies clearly demonstrate the qualitative difference between biological mechanisms and effects at low and at higher doses of IR. We also discuss the genesis and the likely reasons for the persistence of the LNT tenet, despite its scientific implausibility and deleterious social consequences. It is high time to replace the LNT paradigm by a scientifically based dose-effect relationship where realistic quantitative hormetic or threshold models are exploited.
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Affiliation(s)
- Marek K. Janiak
- Professor Emeritus of Medical Sciences, a retiree from the Military Institute of Hygiene and Epidemiology, Warsaw, Poland
| | - Michael P. R. Waligórski
- Centre of Oncology, Kraków Division and Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland
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Cao CF, Ma KL, Shan H, Liu TF, Zhao SQ, Wan Y, Jun-Zhang, Wang HQ. CT Scans and Cancer Risks: A Systematic Review and Dose-response Meta-analysis. BMC Cancer 2022; 22:1238. [PMID: 36451138 PMCID: PMC9710150 DOI: 10.1186/s12885-022-10310-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 11/10/2022] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND There is still uncertainty on whether ionizing radiation from CT scans can increase the risks of cancer. This study aimed to identify the association of cumulative ionizing radiation from CT scans with pertaining cancer risks in adults. METHODS Five databases were searched from their inception to November 15, 2020. Observational studies reporting cancer risks from CT scans in adults were included. The main outcome included quantified cancer risks as cancer case numbers in exposed/unexposed adult participants with unified converted measures to odds ratio (OR) for relative risk, hazard ratio. Global background radiation (2.4 mSv per year) was used as control for lifetime attribution risk (LAR), with the same period from incubation after exposure until survival to 100 years. RESULTS 25 studies were included with a sum of 111,649,943 participants (mean age: 45.37 years, 83.4% women), comprising 2,049,943 actual participants from 6 studies with an average follow-up period as 30.1 years (range, 5 to 80 years); 109,600,000 participants from 19 studies using LAR. The cancer risks for adults following CT scans were inordinately increased (LAR adults, OR, 10.00 [95% CI, 5.87 to 17.05]; actual adults, OR, 1.17 [95%CI, 0.89 to 1.55]; combined, OR, 5.89 [95%CI, 3.46 to 10.35]). Moreover, cancer risks elevated with increase of radiation dose (OR, 33.31 [95% CI, 21.33 to 52.02]), and multiple CT scan sites (OR, 14.08 [95% CI, 6.60 to 30.05]). The risk of solid malignancy was higher than leukemia. Notably, there were no significant differences for age, gender, country, continent, study quality and studying time phrases. CONCLUSIONS Based on 111.6 million adult participants from 3 continents (Asia, Europe and America), this meta-analysis identifies an inordinately increase in cancer risks from CT scans for adults. Moreover, the cancer risks were positively correlated with radiation dose and CT sites. The meta-analysis highlights the awareness of potential cancer risks of CT scans as well as more reasonable methodology to quantify cancer risks in terms of life expectancy as 100 years for LAR. PROSPERO TRIAL REGISTRATION NUMBER CRD42019133487.
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Affiliation(s)
- Chun-Feng Cao
- grid.203458.80000 0000 8653 0555Department of Orthopedics, Yongchuan Hospital of Chongqing Medical University, Hua Road, No. 439, Yongchuan, 402160 Chongqing, People’s Republic of China
| | - Kun-Long Ma
- grid.203458.80000 0000 8653 0555Department of Orthopedics, Yongchuan Hospital of Chongqing Medical University, Hua Road, No. 439, Yongchuan, 402160 Chongqing, People’s Republic of China
| | - Hua Shan
- grid.449637.b0000 0004 0646 966XInstitute of Integrative Medicine, Shaanxi University of Chinese Medicine, Xixian Avenue, Xixian District, Xi’an, 712046 Shaanxi Province People’s Republic of China
| | - Tang-Fen Liu
- grid.449637.b0000 0004 0646 966XInstitute of Integrative Medicine, Shaanxi University of Chinese Medicine, Xixian Avenue, Xixian District, Xi’an, 712046 Shaanxi Province People’s Republic of China
| | - Si-Qiao Zhao
- grid.412262.10000 0004 1761 5538Department of Orthopedics, No.1 Hospital of Xi’an City, Northwestern University, Xi’an, 710002 Shaanxi Province People’s Republic of China
| | - Yi Wan
- grid.233520.50000 0004 1761 4404Department of Health Services, Fourth Military Medical University, Xi’an, 710032 No.169 West Changle Road, Shaanxi Province People’s Republic of China
| | - Jun-Zhang
- grid.489934.bBaoji Central Hospital, 8 Jiangtan Road, Baoji, 721008 Shaanxi Province People’s Republic of China ,grid.43169.390000 0001 0599 1243School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, 710061 Shaanxi Province People’s Republic of China
| | - Hai-Qiang Wang
- grid.449637.b0000 0004 0646 966XInstitute of Integrative Medicine, Shaanxi University of Chinese Medicine, Xixian Avenue, Xixian District, Xi’an, 712046 Shaanxi Province People’s Republic of China
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11
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Gao Y, Dong J, Chen M, Wang T, Yang Z, He K, Li Y, Wang K, Jiang J, Zhang S. Protective effect of low-dose radiation on doxorubicin-induced brain injury in mice. Arch Biochem Biophys 2022; 729:109390. [PMID: 36067878 DOI: 10.1016/j.abb.2022.109390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 08/11/2022] [Accepted: 08/30/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND To investigate the protective effect of low-dose radiation (LDR) on brain injury in mice induced by doxorubicin (DOX). METHODS Sixty female BALB/C mice were randomly divided into the control (CTR) group, low-dose radiation (LDR) group, doxorubicin treatment (DOX) group and low-dose radiation before doxorubicin treatment (COM) group. After 72 h of exposure to 75 mGy, the mice were intraperitoneally injected with 7.5 mg/kg of doxorubicin and sacrificed 5 days later. Neuron-specific enolase (NSE), lactate dehydrogenase (LDH), adenosine triphosphate (ATP), neurotransmitters, inflammatory mediators, apoptosis- and oxidative stress-related mediators as well as mitochondrial dysfunction were examined. RESULTS Compared to the DOX group, the concentrations of DA, 5-HT, EPI and GABA in the COM group were significantly decreased, and the number of TUNEL-positive cells was decreased. In addition, the expression of proapoptotic proteins was downregulated in the COM group compared to the DOX group. Low-dose radiation in advance reduced reactive oxygen species and activated the SOD antioxidant defense system as indicated by significantly reduced GSH expression, increased GSSG expression, increased GPx expression and activation of the Nrf2 redox pathway. After low-dose radiation, the expression levels of ATP5f1, NDUFV1 and CYC1 were close to normal, and the mitochondrial respiratory control rate (RCR) and activity of respiratory chain complex enzymes also tended to be normal. Low-dose radiation upregulated the expression levels of IL-2 and IL-4 but downregulated the expression levels of IL-10 and TGF-β. CONCLUSION LDR has a protective effect on brain injury in mice treated with DOX. The mechanism is related to LDR alleviating mitochondrial dysfunction and oxidative stress, which promotes the production of antioxidant damage proteins, thus exerting an adaptive protective effect on cells.
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Affiliation(s)
- Yan Gao
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, 130021, China
| | - Jingyao Dong
- Department of Thoracic Surgery, The First Hospital of Jilin University, Changchun, 130021, China
| | - Mengmeng Chen
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, 130021, China
| | - Taiwei Wang
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, 130021, China
| | - Zhaoyun Yang
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, 130021, China
| | - Kang He
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, 130021, China
| | - Yuewei Li
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, 130021, China
| | - Kai Wang
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, 130021, China
| | - Jian Jiang
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, 130021, China.
| | - Shuang Zhang
- Department of Rehabilitation, School of Nursing, Jilin University, Changchun, 130021, China.
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12
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Xu J, Liu D, Zhao D, Jiang X, Meng X, Jiang L, Yu M, Zhang L, Jiang H. Role of low-dose radiation in senescence and aging: A beneficial perspective. Life Sci 2022; 302:120644. [PMID: 35588864 DOI: 10.1016/j.lfs.2022.120644] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 05/03/2022] [Accepted: 05/11/2022] [Indexed: 02/06/2023]
Abstract
Cellular senescence refers to the permanent arrest of cell cycle caused by intrinsic and/or extrinsic stressors including oncogene activation, irradiation, DNA damage, oxidative stress, and certain cytokines (including senescence associated secretory phenotype). Cellular senescence is an important factor in aging. Accumulation of senescent cells has been implicated in the causation of various age-related organ disorders, tissue dysfunction, and chronic diseases. It is widely accepted that the biological effects triggered by low-dose radiation (LDR) are different from those caused by high-dose radiation. Experimental evidence suggests that LDR may promote growth and development, enhance longevity, induce embryo production, and delay the progression of chronic diseases. The underlying mechanisms of these effects include modulation of immune response, stimulation of hematopoietic system, antioxidative effect, reduced DNA damage and improved ability for DNA damage repair. In this review, we discuss the possible mechanisms by which LDR prevents senescence and aging from the perspectives of inhibiting cellular senescence and promoting the removal of senescent cells. We review a wide broad of evidence about the beneficial impact of LDR in senescence and aging models (including cardiovascular diseases, neurological diseases, arthritis and osteoporosis, chronic obstructive pulmonary disease and idiopathic pulmonary fibrosis) to highlight the potential value of LDR in preventing aging and age-related diseases. However, there is no consensus on the effect of LDR on human health, and several important aspects require further investigation.
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Affiliation(s)
- Jing Xu
- Department of Health Examination Center, The First Hospital of Jilin University, Changchun 130001, Jilin, China
| | - Dandan Liu
- Department of Health Examination Center, The First Hospital of Jilin University, Changchun 130001, Jilin, China
| | - Di Zhao
- Department of Health Examination Center, The First Hospital of Jilin University, Changchun 130001, Jilin, China
| | - Xin Jiang
- Department of Health Examination Center, The First Hospital of Jilin University, Changchun 130001, Jilin, China
| | - Xinxin Meng
- Department of Health Examination Center, The First Hospital of Jilin University, Changchun 130001, Jilin, China
| | - Lili Jiang
- Department of Health Examination Center, The First Hospital of Jilin University, Changchun 130001, Jilin, China
| | - Meina Yu
- Department of Special Clinic, The First Hospital of Jilin University, Changchun 130001, Jilin, China
| | - Long Zhang
- Department of Health Examination Center, The First Hospital of Jilin University, Changchun 130001, Jilin, China
| | - Hongyu Jiang
- Department of Health Examination Center, The First Hospital of Jilin University, Changchun 130001, Jilin, China.
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13
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Riudavets M, Garcia de Herreros M, Besse B, Mezquita L. Radon and Lung Cancer: Current Trends and Future Perspectives. Cancers (Basel) 2022; 14:cancers14133142. [PMID: 35804914 PMCID: PMC9264880 DOI: 10.3390/cancers14133142] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 06/13/2022] [Accepted: 06/24/2022] [Indexed: 12/20/2022] Open
Abstract
Simple Summary Radon represents the main risk factor of lung cancer in non-smokers and the second one in smoking patients. In Europe, there are several radon-prone areas, but regulatory policies may vary between countries. Radon causes DNA damage and high genomic tumor instability, but its exact carcinogenesis mechanism in lung cancer remains unknown. Molecular drivers in NSCLC are more often described in non-smoker patients and a potential association between radon exposure and oncogenic-driven NSCLC has been postulated. This is an updated review on indoor radon exposure and its role in lung cancer carcinogenesis, especially focusing on its potential relation with NSCLC with driver genomic alterations. We want to contribute to rising knowledge and awareness on this still silent but preventable lung cancer risk factor. Abstract Lung cancer is a public health problem and the first cause of cancer death worldwide. Radon is a radioactive gas that tends to accumulate inside homes, and it is the second lung cancer risk factor after smoking, and the first one in non-smokers. In Europe, there are several radon-prone areas, and although the 2013/59 EURATOM directive is aimed to regulate indoor radon exposition, regulating measures can vary between countries. Radon emits alpha-ionizing radiation that has been linked to a wide variety of cytotoxic and genotoxic effects; however, the link between lung cancer and radon from the genomic point of view remains poorly described. Driver molecular alterations have been recently identified in non-small lung cancer (NSCLC), such as somatic mutations (EGFR, BRAF, HER2, MET) or chromosomal rearrangements (ALK, ROS1, RET, NTRK), mainly in the non-smoking population, where no risk factor has been identified yet. An association between radon exposure and oncogenic NSCLC in non-smokers has been hypothesised. This paper provides a practical, concise and updated review on the implications of indoor radon in lung cancer carcinogenesis, and especially of its potential relation with NSCLC with driver genomic alterations.
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Affiliation(s)
- Mariona Riudavets
- Medical Oncology Department, Gustave Roussy Cancer Campus, University Paris-Saclay, F-94800 Villejuif, France;
| | - Marta Garcia de Herreros
- Medical Oncology Department Hospital Clínic i Provincial de Barcelona, IDIBAPS, 08036 Barcelona, Spain; (M.G.d.H.); (L.M.)
| | - Benjamin Besse
- Medical Oncology Department, Gustave Roussy Cancer Campus, University Paris-Saclay, F-94800 Villejuif, France;
- Correspondence:
| | - Laura Mezquita
- Medical Oncology Department Hospital Clínic i Provincial de Barcelona, IDIBAPS, 08036 Barcelona, Spain; (M.G.d.H.); (L.M.)
- Laboratory of Translational Genomics and Targeted Therapies in Solid Tumors, IDIBAPS, 08036 Barcelona, Spain
- Department of Medicine, University of Barcelona, 08007 Barcelona, Spain
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14
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Adamiak M, Ciechanowicz A, Chumak V, Bujko K, Ratajczak J, Brzezniakiewicz-Janus K, Kucia M, Ratajczak MZ. Novel Evidence That Alternative Pathway of Complement Cascade Activation is Required for Optimal Homing and Engraftment of Hematopoietic Stem/progenitor Cells. Stem Cell Rev Rep 2022; 18:1355-1365. [PMID: 35013937 PMCID: PMC9033710 DOI: 10.1007/s12015-021-10318-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2021] [Indexed: 01/12/2023]
Abstract
We reported in the past that activation of the third (C3) and fifth element (C5) of complement cascade (ComC) is required for a proper homing and engraftment of transplanted hematopoietic stem/progenitor cells (HSPCs). Since myeloablative conditioning for transplantation triggers in recipient bone marrow (BM) state of sterile inflammation, we have become interested in the role of complement in this process and the potential involvement of alternative pathway of ComC activation. We noticed that factor B deficient mice (FB-KO) that do not activate properly alternative pathway, engraft poorly with BM cells from normal wild type (WT) mice. We observed defects both in homing and engraftment of transplanted HSPCs. To shed more light on these phenomena, we found that myeloablative lethal irradiation conditioning for transplantation activates purinergic signaling, ComC, and Nlrp3 inflammasome in WT mice, which is significantly impaired in FB-KO animals. Our proteomics analysis revealed that conditioned for transplantation lethally irradiated FB-KO compared to normal control animals have lower expression of several proteins involved in positive regulation of cell migration, trans-endothelial migration, immune system, cellular signaling protein, and metabolic pathways. Overall, our recent study further supports the role of innate immunity in homing and engraftment of HSPCs.
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Affiliation(s)
- Mateusz Adamiak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY 40202 USA
| | - Andrzej Ciechanowicz
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY 40202 USA
| | - Vira Chumak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY 40202 USA
| | - Kamila Bujko
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY 40202 USA
| | - Janina Ratajczak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY 40202 USA
| | | | - Magdalena Kucia
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY 40202 USA
- Laboratory of Regenerative Medicine, Warsaw Medical University, ul. Banacha 1B, Warsaw, 02-097 Poland
| | - Mariusz Z. Ratajczak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY 40202 USA
- Laboratory of Regenerative Medicine, Warsaw Medical University, ul. Banacha 1B, Warsaw, 02-097 Poland
- Department of Hematology, University of Zielona Gora, Hospital Gorzow Wlkp, Zielona Gora, Poland
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15
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Calabrese EJ, Agathokleous E, Kapoor R, Dhawan G, Calabrese V. Stem Cells And Hormesis. CURRENT OPINION IN TOXICOLOGY 2022. [DOI: 10.1016/j.cotox.2022.03.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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16
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Fang F, Yu X, Wang X, Zhu X, Liu L, Rong L, Niu D, Li J. Transcriptomic profiling reveals gene expression in human peripheral blood after exposure to low-dose ionizing radiation. JOURNAL OF RADIATION RESEARCH 2022; 63:8-18. [PMID: 34788452 PMCID: PMC8776696 DOI: 10.1093/jrr/rrab091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 06/03/2021] [Indexed: 05/15/2023]
Abstract
Although the health effects of exposure to low-dose ionizing radiation have been the focus of many studies, the affected biological functions and underlying regulatory mechanisms are not well-understood. In particular, the influence of radiation exposure at doses of less than 200 mGy on the regulation of genes and pathways remains unclear. To investigate the molecular alterations induced by varying doses of low-dose radiation (LDR), transcriptomic analysis was conducted based on ribonucleic acid (RNA) sequencing following exposure to 50 and 150 mGy doses. Human peripheral blood was collected, and the samples were divided into three groups, including two treatments and one control (no radiation). A total of 876 (318 upregulated and 558 downregulated) and 486 (202 upregulated and 284 downregulated) differentially expressed genes (DEGs) were identified after exposure to 50 mGy and 150 mGy, respectively. Most upregulated genes in both the 50 mGy and 150 mGy groups were associated with 'antigen processing and presentation,' which appeared to be the major targets affected by LDR exposure. Several interacting genes, including HLA-DQA1, HLA-DQA2, HLA-DQB2, HLA-DRB1, and HLA-DRB5 were mapped to 'antigen processing and presentation,' 'immune system-related diseases' and the 'cytokine-mediated signaling pathway,' suggesting that these genes might drive the downstream transmission of these signal transduction pathways. Our results suggest that exposure to LDR may elicit changes in key genes and associated pathways, probably helping further explore the biological processes and molecular mechanism responsible for low-dose occupational or environmental exposures in humans.
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Affiliation(s)
| | | | | | | | | | | | | | - Jue Li
- Corresponding author. Department of Scientific Research, Beijing Institute of Occupational Disease Prevention and Treatment (The Beijing Prevention and Treatment Hospital of Occupational Disease for Chemical Industry), 50 Xiangshan Yikesong Road, Haidian District, Beijing 100093, China.
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17
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Mitigation of Iron Irradiation-Induced Genotoxicity and Genomic Instability by Postexposure Dietary Restriction in Mice. BIOMED RESEARCH INTERNATIONAL 2021; 2021:2888393. [PMID: 34926683 PMCID: PMC8677402 DOI: 10.1155/2021/2888393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 11/05/2021] [Indexed: 11/17/2022]
Abstract
Background and Purpose. Postexposure onset of dietary restriction (DR) is expected to provide therapeutic nutritional approaches to reduce health risk from exposure to ionizing radiation (IR) due to such as manned space exploration, radiotherapy, or nuclear accidents as IR could alleviate radiocarcinogenesis in animal models. However, the underlying mechanisms remain largely unknown. This study is aimed at investigating the effect from postexposure onset of DR on genotoxicity and genomic instability (GI) induced by total body irradiation (TBI) in mice. Materials and Methods. Mice were exposed to 2.0 Gy of accelerated iron particles with an initial energy of 500 MeV/nucleon and a linear energy transfer (LET) value of about 200 keV/μm. After TBI, mice were either allowed to free access to a standard laboratory chow or treated under DR (25% cut in diet). Using micronucleus frequency (MNF) in bone marrow erythrocytes, induction of acute genotoxicity and GI in the hematopoietic system was, respectively, determined 1 and 2 months after TBI. Results and Conclusions. TBI alone caused a significant increase in MNF while DR alone did not markedly influence the MNF. DR induced a significant decrease in MNF compared to the treatment by TBI alone. Results demonstrated that postexposure onset of DR could relieve the elevated MNF induced by TBI with high-LET iron particles. These findings indicated that reduction in acute genotoxicity and late GI may be at least a part of the mechanisms underlying decreased radiocarcinogenesis by DR.
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18
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Low Dose Ionising Radiation-Induced Hormesis: Therapeutic Implications to Human Health. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11198909] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The concept of radiation-induced hormesis, whereby a low dose is beneficial and a high dose is detrimental, has been gaining attention in the fields of molecular biology, environmental toxicology and radiation biology. There is a growing body of literature that recognises the importance of hormetic dose response not only in the radiation field, but also with molecular agents. However, there is continuing debate on the magnitude and mechanism of radiation hormetic dose response, which could make further contributions, as a research tool, to science and perhaps eventually to public health due to potential therapeutic benefits for society. The biological phenomena of low dose ionising radiation (LDIR) includes bystander effects, adaptive response, hypersensitivity, radioresistance and genomic instability. In this review, the beneficial and the detrimental effects of LDIR-induced hormesis are explored, together with an overview of its underlying cellular and molecular mechanisms that may potentially provide an insight to the therapeutic implications to human health in the future.
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Dunlap NE, van Berkel V, Cai L. COVID-19 and low-dose radiation therapy. RADIATION MEDICINE AND PROTECTION 2021; 2:139-145. [PMID: 34522905 PMCID: PMC8429076 DOI: 10.1016/j.radmp.2021.09.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 02/06/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative pathogen of the coronavirus disease 2019 (COVID-19), has caused more than 179 million infections and 3.8 million deaths worldwide. Global health authorities working on the COVID-19 outbreak continue to explore methods to reduce the rate of its transmission to healthy individuals. Treatment protocols thus far have focused on social distancing and masking, treatment with antivirals early in infection, and steroids to reduce the inflammatory response. An alternative approach is therapy with low dose radiation (LDR), which has several advantages compared to the current drugs and medicines. To date more than 10 case reports and pilot clinical trial preliminary outcome are available from different countries. These reports cover a wide range of patient conditions and LDR treatment strategies. Although one report showed the failure to observe the improvement of COVID-19 patients after LDR therapy, the majority showed some clinical improvement, and demonstrated the safety of LDR for COVID-19 patients, particularly with 0.5 Gy. This review aims to summarize the potential rationales and mechanisms of LDR therapy for COVID-19 patients, and its current clinical status and potential use.
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Affiliation(s)
- Neal E Dunlap
- Department of Radiation Oncology, University of Louisville School of Medicine, Louisville, KY, 40202, USA
| | - Victor van Berkel
- Department of Cardiovascular and Thoracic Surgery, University of Louisville School of Medicine, Louisville, KY, 40204, USA
| | - Lu Cai
- Department of Radiation Oncology, University of Louisville School of Medicine, Louisville, KY, 40202, USA.,Pediatric Research Institute, Departments of Pediatrics, Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY, 40202, USA
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20
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He CQ, Mao L, Yao J, Zhao WC, Huang B, Hu N, Long DX. The Threshold Effects of Low-Dose-Rate Radiation on miRNA-Mediated Neurodevelopment of Zebrafish. Radiat Res 2021; 196:633-646. [PMID: 34399425 DOI: 10.1667/rade-20-00265.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 07/29/2021] [Indexed: 11/03/2022]
Abstract
The biological effects and regulatory mechanisms of low-dose and low-dose-rate radiation are still rather controversial. Therefore, in this study we investigated the effects of low-dose-rate radiation on zebrafish neurodevelopment and the role of miRNAs in radiation-induced neurodevelopment. Zebrafish embryos received prolonged gamma-ray irradiation (0 mGy/h, 0.1 mGy/h, 0.2 mGy/h, 0.4 mGy/h) during development. Neurodevelopmental indicators included mortality, malformation rate, swimming speed, as well as the morphology changes of the lateral line system and brain tissue. Additionally, spatiotemporal expression of development-related miRNAs (dre-miR-196a-5p, dre-miR-210-3p, dre-miR-338) and miRNA processing enzymes genes (Dicer and Drosha) were assessed by qRT-PCR and whole mount in situ hybridization (WISH). The results revealed a decline in mortality, malformation and swimming speed, with normal histological and morphological appearance, in zebrafish that received 0.1 mGy/h; however, increased mortality, malformation and swimming speed were observed, with pathological changes, in zebrafish that received 0.2 mGy/h and 0.4 mGy/h. The expression of miRNA processing enzyme genes was altered after irradiation, and miRNAs expression was downregulated in the 0.1 mGy/h group, and upregulated in the 0.2 mGy/h and 0.4 mGy/h groups. Furthermore, ectopic expression of dre-miR-210-3p, Dicer and Drosha was also observed in the 0.4 mGy/h group. In conclusion, the effect of low-dose and low-dose-rate radiation on neurodevelopment follows the threshold model, under the regulation of miRNAs, excitatory effects occurred at a dose rate of 0.1 mGy/h and toxic effects occurred at a dose rate of 0.2 mGy/h and 0.4 mGy/h.
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Affiliation(s)
- Chu-Qi He
- School of Public Health, University of South China, Hengyang 421001, PR China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, Hengyang, Hunan 421001, China
| | - Liang Mao
- School of Public Health, University of South China, Hengyang 421001, PR China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, Hengyang, Hunan 421001, China
| | - Jin Yao
- School of Public Health, University of South China, Hengyang 421001, PR China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, Hengyang, Hunan 421001, China
| | - Wei-Chao Zhao
- School of Public Health, University of South China, Hengyang 421001, PR China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, Hengyang, Hunan 421001, China
| | - Bo Huang
- School of Public Health, University of South China, Hengyang 421001, PR China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, Hengyang, Hunan 421001, China
| | - Nan Hu
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, China
| | - Ding-Xin Long
- School of Public Health, University of South China, Hengyang 421001, PR China.,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, Hengyang, Hunan 421001, China
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21
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Garrett L, Ung MC, Einicke J, Zimprich A, Fenzl F, Pawliczek D, Graw J, Dalke C, Hölter SM. Complex Long-term Effects of Radiation on Adult Mouse Behavior. Radiat Res 2021; 197:67-77. [PMID: 34237145 DOI: 10.1667/rade-20-00281.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 05/24/2021] [Indexed: 11/03/2022]
Abstract
We have shown previously that a single radiation event (0.063, 0.125 or 0.5 Gy, 0.063 Gy/min) in adult mice (age 10 weeks) can have delayed dose-dependent effects on locomotor behavior 18 months postirradiation. The highest dose (0.5 Gy) reduced, whereas the lowest dose (0.063 Gy) increased locomotor activity at older age independent of sex or genotype. In the current study we investigated whether higher doses administered at a higher dose rate (0.5, 1 or 2 Gy, 0.3 Gy/min) at the same age (10 weeks) cause stronger or earlier effects on a range of behaviors, including locomotion, anxiety, sensorimotor and cognitive behavior. There were clear dose-dependent effects on spontaneous locomotor and exploratory activity, anxiety-related behavior, body weight and affiliative social behavior independent of sex or genotype of wild-type and Ercc2S737P heterozygous mice on a mixed C57BL/6JG and C3HeB/FeJ background. In addition, smaller genotype- and dose-dependent radiation effects on working memory were evident in males, but not in females. The strongest dose-dependent radiation effects were present 4 months postirradiation, but only effects on affiliative social behaviors persisted until 12 months postirradiation. The observed radiation-induced behavioral changes were not related to alterations in the eye lens, as 4 months postirradiation anterior and posterior parts of the lens were still normal. Overall, we did not find any sensitizing effect of the mutation towards radiation effects in vivo.
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Affiliation(s)
- Lillian Garrett
- Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Developmental Genetics, Neuherberg, Germany
| | - Marie-Claire Ung
- Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Developmental Genetics, Neuherberg, Germany
| | - Jan Einicke
- Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Developmental Genetics, Neuherberg, Germany
| | - Annemarie Zimprich
- Technical University Munich, School of Life Science Weihenstephan, Freising, Germany
| | - Felix Fenzl
- Technical University Munich, School of Life Science Weihenstephan, Freising, Germany
| | - Daniel Pawliczek
- Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Developmental Genetics, Neuherberg, Germany
| | - Jochen Graw
- Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Developmental Genetics, Neuherberg, Germany
| | - Claudia Dalke
- Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Developmental Genetics, Neuherberg, Germany
| | - Sabine M Hölter
- Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Developmental Genetics, Neuherberg, Germany.,Technical University Munich, School of Life Science Weihenstephan, Freising, Germany
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22
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Nowosielska EM, Cheda A, Pociegiel M, Cheda L, Szymański P, Wiedlocha A. Effects of a Unique Combination of the Whole-Body Low Dose Radiotherapy with Inactivation of Two Immune Checkpoints and/or a Heat Shock Protein on the Transplantable Lung Cancer in Mice. Int J Mol Sci 2021; 22:6309. [PMID: 34208396 PMCID: PMC8231142 DOI: 10.3390/ijms22126309] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 11/25/2022] Open
Abstract
Non-small cell lung cancer (NSCLC) continues to be the leading cause of cancer death worldwide. Recently, targeting molecules whose functions are associated with tumorigenesis has become a game changing adjunct to standard anti-cancer therapy. As evidenced by the results of preclinical and clinical investigations, whole-body irradiations (WBI) with X-rays at less than 0.1-0.2 Gy per fraction can induce remissions of various neoplasms without inciting adverse side effects of conventional chemo- and radiotherapy. In the present study, a murine model of human NSCLC was employed to evaluate for the first time the anti-neoplastic efficacy of WBI combined with inactivation of CTLA-4, PD-1, and/or HSP90. The results indicate that WBI alone and in conjunction with the inhibition of the function of the cytotoxic T-lymphocyte antigen-4 (CTLA-4) and the programmed death-1 (PD-1) receptor immune checkpoints (ICs) and/or heat shock protein 90 (HSP90) markedly reduced tumorigenesis in mice implanted by three different routes with the syngeneic Lewis lung cancer cells and suppressed clonogenic potential of Lewis lung carcinoma (LLC1) cells in vitro. These results were associated with the relevant changes in the profile of pro- and anti-neoplastic immune cells recruited to the growing tumors and the circulating anti- and pro-inflammatory cytokines. In contrast, inhibition of the tested molecular targets used either separately or in combination with each other did not exert notable anti-neoplastic effects. Moreover, no significant synergistic effects were detected when the inhibitors were applied concurrently with WBI. The obtained results supplemented with further mechanistic explanations provided by future investigations will help design the effective strategies of treatment of lung and other cancers based on inactivation of the immune checkpoint and/or heat shock molecules combined with low-dose radiotherapy.
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Affiliation(s)
- Ewa M. Nowosielska
- Department of Radiobiology and Radiation Protection, Military Institute of Hygiene and Epidemiology, 4 Kozielska St., 01-163 Warsaw, Poland; (A.C.); (P.S.); (A.W.)
| | - Aneta Cheda
- Department of Radiobiology and Radiation Protection, Military Institute of Hygiene and Epidemiology, 4 Kozielska St., 01-163 Warsaw, Poland; (A.C.); (P.S.); (A.W.)
| | - Mateusz Pociegiel
- National Centre for Nuclear Research Radioisotope Centre POLATOM, 7A Soltana St., 05-400 Otwock, Poland;
| | - Lukasz Cheda
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 101 Żwirki i Wigury St., 02-089 Warsaw, Poland;
| | - Paweł Szymański
- Department of Radiobiology and Radiation Protection, Military Institute of Hygiene and Epidemiology, 4 Kozielska St., 01-163 Warsaw, Poland; (A.C.); (P.S.); (A.W.)
- Department of Pharmaceutical Chemistry, Drug Analyses and Radiopharmacy, Faculty of Pharmacy, Medical University of Lodz, 1 Muszyńskiego St., 90-151 Lodz, Poland
| | - Antoni Wiedlocha
- Department of Radiobiology and Radiation Protection, Military Institute of Hygiene and Epidemiology, 4 Kozielska St., 01-163 Warsaw, Poland; (A.C.); (P.S.); (A.W.)
- Department of Molecular Cell Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Montebello, 0379 Oslo, Norway
- Centre for Cancer Reprograming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Montebello, 0379 Oslo, Norway
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23
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Nemec-Bakk AS, Niccoli S, Davidson C, Roy D, Stoa L, Sreetharan S, Simard A, Boreham DR, Wilson JY, Tai T, Lees SJ, Khaper N. Lasting Effects of Low to Non-Lethal Radiation Exposure during Late Gestation on Offspring's Cardiac Metabolism and Oxidative Stress. Antioxidants (Basel) 2021; 10:antiox10050816. [PMID: 34065524 PMCID: PMC8160807 DOI: 10.3390/antiox10050816] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 05/12/2021] [Accepted: 05/15/2021] [Indexed: 01/24/2023] Open
Abstract
Ionizing radiation (IR) is known to cause fetal programming, but the physiological effects of low-dose IR are not fully understood. This study examined the effect of low (50 mGy) to non-lethal (300 and 1000 mGy) radiation exposure during late gestation on cardiac metabolism and oxidative stress in adult offspring. Pregnant C57BL/6J mice were exposed to 50, 300, or 1000 mGy of gamma radiation or Sham irradiation on gestational day 15. Sixteen weeks after birth, 18F-Fluorodeoxyglucose (FDG) uptake was examined in the offspring using Positron Emission Tomography imaging. Western blot was used to determine changes in oxidative stress, antioxidants, and insulin signaling related proteins. Male and female offspring from irradiated dams had lower body weights when compared to the Sham. 1000 mGy female offspring demonstrated a significant increase in 18F-FDG uptake, glycogen content, and oxidative stress. 300 and 1000 mGy female mice exhibited increased superoxide dismutase activity, decreased glutathione peroxidase activity, and decreased reduced/oxidized glutathione ratio. We conclude that non-lethal radiation during late gestation can alter glucose uptake and increase oxidative stress in female offspring. These data provide evidence that low doses of IR during the third trimester are not harmful but higher, non-lethal doses can alter cardiac metabolism later in life and sex may have a role in fetal programming.
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Affiliation(s)
- Ashley S. Nemec-Bakk
- Department of Science and Environmental Studies, Lakehead University, Thunder Bay, ON P7B 5E1, Canada;
| | - Sarah Niccoli
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (S.N.); (C.D.); (S.J.L.)
| | - Caitlund Davidson
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (S.N.); (C.D.); (S.J.L.)
| | - Danika Roy
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
| | - Lisa Stoa
- Department of Biology, McMaster University, Hamilton, ON L8S 4L8, Canada; (L.S.); (S.S.); (J.Y.W.)
| | - Shayenthiran Sreetharan
- Department of Biology, McMaster University, Hamilton, ON L8S 4L8, Canada; (L.S.); (S.S.); (J.Y.W.)
| | - Alain Simard
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
| | - Douglas R. Boreham
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
- Northern Ontario School of Medicine, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
- Biomolecular Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada
| | - Joanna Y. Wilson
- Department of Biology, McMaster University, Hamilton, ON L8S 4L8, Canada; (L.S.); (S.S.); (J.Y.W.)
| | - T.C. Tai
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
- Northern Ontario School of Medicine, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
- Biomolecular Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada
| | - Simon J. Lees
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (S.N.); (C.D.); (S.J.L.)
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
- Northern Ontario School of Medicine, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - Neelam Khaper
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (S.N.); (C.D.); (S.J.L.)
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
- Northern Ontario School of Medicine, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
- Biomolecular Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada
- Correspondence:
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24
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Zhang C, Liang Z, Ma S, Liu X. Radiotherapy and Cytokine Storm: Risk and Mechanism. Front Oncol 2021; 11:670464. [PMID: 34094967 PMCID: PMC8173139 DOI: 10.3389/fonc.2021.670464] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 04/20/2021] [Indexed: 12/27/2022] Open
Abstract
Radiotherapy (RT) shows advantages as one of the most important precise therapy strategies for cancer treatment, especially high-dose hypofractionated RT which is widely used in clinical applications due to the protection of local anatomical structure and relatively mild impairment. With the increase of single dose, ranging from 2~20 Gy, and the decrease of fractionation, the question that if there is any uniform standard of dose limits for different therapeutic regimens attracts more and more attention, and the potential adverse effects of higher dose radiation have not been elucidated. In this study, the immunological adverse responses induced by radiation, especially the cytokine storm and the underlying mechanisms such as DAMPs release, pro-inflammatory cytokine secretion and cGAS-STING pathway activation, will be elucidated, which contributes to achieving optimal hypofractionated RT regimen, improving the killing of cancer cells and avoiding the severe side effects.
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Affiliation(s)
- Chen Zhang
- School of Public Health and Management, Wenzhou Medical University, Wenzhou, China
| | - Zhenzhen Liang
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
| | - Shumei Ma
- School of Public Health and Management, Wenzhou Medical University, Wenzhou, China.,Key Laboratory of Watershed Science and Health of Zhejiang Province, Wenzhou Medical University, Wenzhou, China
| | - Xiaodong Liu
- School of Public Health and Management, Wenzhou Medical University, Wenzhou, China.,Key Laboratory of Watershed Science and Health of Zhejiang Province, Wenzhou Medical University, Wenzhou, China
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25
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Lumniczky K, Impens N, Armengol G, Candéias S, Georgakilas AG, Hornhardt S, Martin OA, Rödel F, Schaue D. Low dose ionizing radiation effects on the immune system. ENVIRONMENT INTERNATIONAL 2021; 149:106212. [PMID: 33293042 PMCID: PMC8784945 DOI: 10.1016/j.envint.2020.106212] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/20/2020] [Accepted: 09/03/2020] [Indexed: 05/03/2023]
Abstract
Ionizing radiation interacts with the immune system in many ways with a multiplicity that mirrors the complexity of the immune system itself: namely the need to maintain a delicate balance between different compartments, cells and soluble factors that work collectively to protect, maintain, and restore tissue function in the face of severe challenges including radiation damage. The cytotoxic effects of high dose radiation are less relevant after low dose exposure, where subtle quantitative and functional effects predominate that may go unnoticed until late after exposure or after a second challenge reveals or exacerbates the effects. For example, low doses may permanently alter immune fitness and therefore accelerate immune senescence and pave the way for a wide spectrum of possible pathophysiological events, including early-onset of age-related degenerative disorders and cancer. By contrast, the so called low dose radiation therapy displays beneficial, anti-inflammatory and pain relieving properties in chronic inflammatory and degenerative diseases. In this review, epidemiological, clinical and experimental data regarding the effects of low-dose radiation on the homeostasis and functional integrity of immune cells will be discussed, as will be the role of immune-mediated mechanisms in the systemic manifestation of localized exposures such as inflammatory reactions. The central conclusion is that ionizing radiation fundamentally and durably reshapes the immune system. Further, the importance of discovery of immunological pathways for modifying radiation resilience amongst other research directions in this field is implied.
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Affiliation(s)
- Katalin Lumniczky
- National Public Health Centre, Department of Radiation Medicine, Budapest, Albert Florian u. 2-6, 1097, Hungary.
| | - Nathalie Impens
- Belgian Nuclear Research Centre, Biosciences Expert Group, Boeretang 200, 2400 Mol, Belgium.
| | - Gemma Armengol
- Unit of Biological Anthropology, Department of Animal Biology, Plant Biology and Ecology, Faculty of Biosciences, Universitat Autònoma de Barcelona, 08193-Bellaterra, Barcelona, Catalonia, Spain.
| | - Serge Candéias
- Université Grenoble-Alpes, CEA, CNRS, IRIG-LCBM, 38000 Grenoble, France.
| | - Alexandros G Georgakilas
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens (NTUA), Zografou 15780, Athens, Greece.
| | - Sabine Hornhardt
- Federal Office for Radiation Protection (BfS), Ingolstaedter Landstr.1, 85764 Oberschleissheim, Germany.
| | - Olga A Martin
- Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne 3052, Victoria, Australia.
| | - Franz Rödel
- Department of Radiotherapy and Oncology, University Hospital, Goethe University Frankfurt am Main, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany.
| | - Dörthe Schaue
- Department of Radiation Oncology, David Geffen School of Medicine, University of California at Los Angeles (UCLA), Los Angeles, CA 90095-1714, USA.
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26
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Less Can Be More: The Hormesis Theory of Stress Adaptation in the Global Biosphere and Its Implications. Biomedicines 2021; 9:biomedicines9030293. [PMID: 33805626 PMCID: PMC8000639 DOI: 10.3390/biomedicines9030293] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/07/2021] [Accepted: 03/10/2021] [Indexed: 02/07/2023] Open
Abstract
A dose-response relationship to stressors, according to the hormesis theory, is characterized by low-dose stimulation and high-dose inhibition. It is non-linear with a low-dose optimum. Stress responses by cells lead to adapted vitality and fitness. Physical stress can be exerted through heat, radiation, or physical exercise. Chemical stressors include reactive species from oxygen (ROS), nitrogen (RNS), and carbon (RCS), carcinogens, elements, such as lithium (Li) and silicon (Si), and metals, such as silver (Ag), cadmium (Cd), and lead (Pb). Anthropogenic chemicals are agrochemicals (phytotoxins, herbicides), industrial chemicals, and pharmaceuticals. Biochemical stress can be exerted through toxins, medical drugs (e.g., cytostatics, psychopharmaceuticals, non-steroidal inhibitors of inflammation), and through fasting (dietary restriction). Key-lock interactions between enzymes and substrates, antigens and antibodies, antigen-presenting cells, and cognate T cells are the basics of biology, biochemistry, and immunology. Their rules do not obey linear dose-response relationships. The review provides examples of biologic stressors: oncolytic viruses (e.g., immuno-virotherapy of cancer) and hormones (e.g., melatonin, stress hormones). Molecular mechanisms of cellular stress adaptation involve the protein quality control system (PQS) and homeostasis of proteasome, endoplasmic reticulum, and mitochondria. Important components are transcription factors (e.g., Nrf2), micro-RNAs, heat shock proteins, ionic calcium, and enzymes (e.g., glutathion redox enzymes, DNA methyltransferases, and DNA repair enzymes). Cellular growth control, intercellular communication, and resistance to stress from microbial infections involve growth factors, cytokines, chemokines, interferons, and their respective receptors. The effects of hormesis during evolution are multifarious: cell protection and survival, evolutionary flexibility, and epigenetic memory. According to the hormesis theory, this is true for the entire biosphere, e.g., archaia, bacteria, fungi, plants, and the animal kingdoms.
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27
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Janiak MK, Pocięgiel M, Welsh JS. Time to rejuvenate ultra-low dose whole-body radiotherapy of cancer. Crit Rev Oncol Hematol 2021; 160:103286. [PMID: 33667656 DOI: 10.1016/j.critrevonc.2021.103286] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 12/11/2020] [Accepted: 02/27/2021] [Indexed: 12/24/2022] Open
Abstract
The results of clinical trials performed from the 1930s until the end of the 20th century in which total-body ultra-low level ionizing radiation (TB-LLR) was used demonstrate that this form of treatment can be equal or superior to other systemic anti-neoplastic modalities in terms of the rates of remissions, toxicity, and side effects. In this review, we provide the rationale for TB-LLR and analyze the results of reliable clinical trials in patients with predominantly lymphoproliferative disorders but also advanced solid cancers. The doses used in these trials did not exceed 0.1-0.2 Gy per fraction and cumulative totals ranged from 1 to 4 Gy. Based on the reviewed results we conclude that it is appropriate to revive interest in and resume clinical investigations of TB-LLR in order to refine and improve the effectiveness of such treatment, whether employed alone or in combination with other anticancer strategies.
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Affiliation(s)
- Marek K Janiak
- Military Institute of Hygiene and Epidemiology, Warsaw, Poland.
| | | | - James S Welsh
- Loyola University Chicago, Edward Hines Jr., VA Hospital, Stritch School of Medicine, Department of Radiation Oncology, Maywood, IL 601fv53, USA
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28
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Vaiserman A, Cuttler JM, Socol Y. Low-dose ionizing radiation as a hormetin: experimental observations and therapeutic perspective for age-related disorders. Biogerontology 2021; 22:145-164. [PMID: 33420860 PMCID: PMC7794644 DOI: 10.1007/s10522-020-09908-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 11/24/2020] [Indexed: 01/31/2023]
Abstract
Hormesis is any kind of biphasic dose-response when low doses of some agents are beneficial while higher doses are detrimental. Radiation hormesis is the most thoroughly investigated among all hormesis-like phenomena, in particular in biogerontology. In this review, we aimed to summarize research evidence supporting hormesis through exposure to low-dose ionizing radiation (LDIR). Radiation-induced longevity hormesis has been repeatedly reported in invertebrate models such as C. elegans, Drosophila and flour beetles and in vertebrate models including guinea pigs, mice and rabbits. On the contrary, suppressing natural background radiation was repeatedly found to cause detrimental effects in protozoa, bacteria and flies. We also discussed here the possibility of clinical use of LDIR, predominantly for age-related disorders, e.g., Alzheimer's disease, for which no remedies are available. There is accumulating evidence that LDIR, such as those commonly used in X-ray imaging including computer tomography, might act as a hormetin. Of course, caution should be exercised when introducing new medical practices, and LDIR therapy is no exception. However, due to the low average residual life expectancy in old patients, the short-term benefits of such interventions (e.g., potential therapeutic effect against dementia) may outweigh their hypothetical delayed risks (e.g., cancer). We argue here that assessment and clinical trials of LDIR treatments should be given priority bearing in mind the enormous economic, social and ethical implications of potentially-treatable, age-related disorders.
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29
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Ung MC, Garrett L, Dalke C, Leitner V, Dragosa D, Hladik D, Neff F, Wagner F, Zitzelsberger H, Miller G, de Angelis MH, Rößler U, Vogt Weisenhorn D, Wurst W, Graw J, Hölter SM. Dose-dependent long-term effects of a single radiation event on behaviour and glial cells. Int J Radiat Biol 2020; 97:156-169. [PMID: 33264576 DOI: 10.1080/09553002.2021.1857455] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE The increasing use of low-dose ionizing radiation in medicine requires a systematic study of its long-term effects on the brain, behaviour and its possible association with neurodegenerative disease vulnerability. Therefore, we analysed the long-term effects of a single low-dose irradiation exposure at 10 weeks of age compared to medium and higher doses on locomotor, emotion-related and sensorimotor behaviour in mice as well as on hippocampal glial cell populations. MATERIALS AND METHODS We determined the influence of radiation dose (0, 0.063, 0.125 or 0.5 Gy), time post-irradiation (4, 12 and 18 months p.i.), sex and genotype (wild type versus mice with Ercc2 DNA repair gene point mutation) on behaviour. RESULTS The high dose (0.5 Gy) had early-onset adverse effects at 4 months p.i. on sensorimotor recruitment and late-onset negative locomotor effects at 12 and 18 months p.i. Notably, the low dose (0.063 Gy) produced no early effects but subtle late-onset (18 months) protective effects on sensorimotor recruitment and exploratory behaviour. Quantification and morphological characterization of the microglial and the astrocytic cells of the dentate gyrus 24 months p.i. indicated heightened immune activity after high dose irradiation (0.125 and 0.5 Gy) while conversely, low dose (0.063 Gy) induced more neuroprotective features. CONCLUSION This is one of the first studies demonstrating such long-term and late-onset effects on brain and behaviour after a single radiation event in adulthood.
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Affiliation(s)
- Marie-Claire Ung
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany.,Institute of Pathology, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany.,Institute of Radiation Medicine, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany.,Research Unit of Radiation Cytogenetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany.,German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
| | - Lillian Garrett
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany.,German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
| | - Claudia Dalke
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
| | | | - Daniel Dragosa
- Technische Universität München, Freising-Weihenstephan, Germany
| | - Daniela Hladik
- Technische Universität München, Freising-Weihenstephan, Germany
| | - Frauke Neff
- Institute of Pathology, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
| | - Florian Wagner
- Institute of Radiation Medicine, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
| | - Horst Zitzelsberger
- Research Unit of Radiation Cytogenetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
| | - Gregor Miller
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
| | - Martin Hrabĕ de Angelis
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany.,Department of Experimental Genetics, School of Life Science Weihenstephan, Technische Universität München, Freising, Germany.,German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Ute Rößler
- Federal Office for Radiation Protection, Department of Radiation Protection and Health, Neuherberg, Germany
| | - Daniela Vogt Weisenhorn
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
| | - Wolfgang Wurst
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany.,Chair of Developmental Genetics, Faculty of Life and Food Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany.,German Center for Neurodegenerative Diseases (DZNE), Site Munich, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Jochen Graw
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
| | - Sabine M Hölter
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany.,German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany.,Technische Universität München, Freising-Weihenstephan, Germany
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30
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Saeed A, Abolaban F. Risk estimation of the low-dose fast neutrons on the molecular structure of the lipids of peripheral blood mononuclear cells. Biochem Biophys Res Commun 2020; 533:1048-1053. [DOI: 10.1016/j.bbrc.2020.09.116] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/14/2020] [Accepted: 09/24/2020] [Indexed: 12/20/2022]
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Calabrese EJ, Kozumbo WJ. The phytoprotective agent sulforaphane prevents inflammatory degenerative diseases and age-related pathologies via Nrf2-mediated hormesis. Pharmacol Res 2020; 163:105283. [PMID: 33160067 DOI: 10.1016/j.phrs.2020.105283] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/23/2020] [Accepted: 10/23/2020] [Indexed: 12/17/2022]
Abstract
In numerous experimental models, sulforaphane (SFN) is shown herein to induce hormetic dose responses that are not only common but display endpoints of biomedical and clinical relevance. These hormetic responses are mediated via the activation of nuclear factor erythroid- derived 2 (Nrf2) antioxidant response elements (AREs) and, as such, are characteristically biphasic, well integrated, concentration/dose dependent, and specific with regard to the targeted cell type and the temporal profile of response. In experimental disease models, the SFN-induced hormetic activation of Nrf2 was shown to effectively reduce the occurrence and severity of a wide range of human-related pathologies, including Parkinson's disease, Alzheimer's disease, stroke, age-related ocular damage, chemically induced brain damage, and renal nephropathy, amongst others, while also enhancing stem cell proliferation. Although SFN was broadly chemoprotective within an hormetic dose-response context, it also enhanced cell proliferation/cell viability at low concentrations in multiple tumor cell lines. Although the implications of the findings in tumor cells are largely uncertain at this time and warrant further consideration, the potential utility of SFN in cancer treatment has not been precluded. This assessment of SFN complements recent reports of similar hormesis-based chemoprotections by other widely used dietary supplements, such as curcumin, ginkgo biloba, ginseng, green tea, and resveratrol. Interestingly, the mechanistic profile of SFN is similar to that of numerous other hormetic agents, indicating that activation of the Nrf2/ARE pathway is probably a central, integrative, and underlying mechanism of hormesis itself. The Nrf2/ARE pathway provides an explanation for how large numbers of agents that both display hormetic dose responses and activate Nrf2 can function to limit age-related damage, the progression of numerous disease processes, and chemical- and radiation- induced toxicities. These findings extend the generality of the hormetic dose response to include SFN and many other chemical activators of Nrf2 that are cited in the biomedical literature and therefore have potentially important public health and clinical implications.
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Affiliation(s)
- Edward J Calabrese
- Environmental Health Sciences, Morrill I, N344, University of Massachusetts, Amherst, MA, 01003, United States.
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Saeed A, Murshed MN, Al-Shahari EA. Effect of low-dose fast neutrons on the protein components of peripheral blood mononuclear cells of whole-body irradiated Wistar rats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:40443-40455. [PMID: 32666461 DOI: 10.1007/s11356-020-10085-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
The immune system is exposed to extremely low doses of neutrons under different circumstances, such as through exposure to cosmic rays, nuclear accidents, and neutron therapy. Peripheral blood mononuclear cells (PBMCs) are the primary immune cells that exhibit selective immune responses. Changes in the functions of the protein components of PBMC can be induced by structural modifications of these proteins themselves. Herein, we have investigated the effect of low-dose fast neutrons on PBMC proteins at 0, 2, 4, and 8 days post-whole body irradiation. 64 Wistar rats were used in this study of which, 32 were exposed to fast neutrons at a total dose of 10 mGy (241Am-Be, 0.2 mGy/h), and the other 32 were used as controls. Blood samples were drawn, and PBMCs were isolated from whole blood. Fourier transform infrared (FTIR) spectroscopy and fluorescence spectroscopy were used to estimate the changes in the proteins of PBMCs. An alkaline comet assay was performed to assess DNA damage. Hierarchical cluster analysis (HCA) and principal components analysis (PCA) were utilized to discriminate between irradiated and non-irradiated samples. FTIR and fluorescence spectra of the tested samples revealed alterations in the amides and tryptophan, and therefore protein structure at time intervals of 2 and 4 days post-irradiation. No changes were recorded in samples tested at time intervals of 0 and 8 days post-irradiation. The FTIR band intensities of the PBMC proteins of the irradiated samples decreased slightly and were statistically significant. Curve fitting of the amide I band in the FTIR spectra showed changes in the secondary structure of the proteins. At 2 days post-irradiation, fluorescence spectra of the tested samples revealed decreases in the band tryptophan. The comet assay revealed low levels of DNA damage. In conclusion, low-dose fast neutrons can affect the proteins of PBMC.
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Affiliation(s)
- Abdu Saeed
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
- Department of Physics, Thamar University, Thamar, Yemen.
| | - Mohammad N Murshed
- Department of Physics, Faculty of Science and Arts, Mohayel Aser, King Khalid University, Abha, Saudi Arabia
- Department of Physics, Faculty of Science, Ibb University, Ibb, Yemen
| | - Eman Abdulqader Al-Shahari
- Department of Biology, Faculty of Science and Arts, Mohayel Aser, King Khalid University, Abha, Saudi Arabia
- Department of Biology, Faculty of Science, Ibb University, Ibb, Yemen
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Ionizing Radiation and Translation Control: A Link to Radiation Hormesis? Int J Mol Sci 2020; 21:ijms21186650. [PMID: 32932812 PMCID: PMC7555331 DOI: 10.3390/ijms21186650] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 09/04/2020] [Indexed: 02/06/2023] Open
Abstract
Protein synthesis, or mRNA translation, is one of the most energy-consuming functions in cells. Translation of mRNA into proteins is thus highly regulated by and integrated with upstream and downstream signaling pathways, dependent on various transacting proteins and cis-acting elements within the substrate mRNAs. Under conditions of stress, such as exposure to ionizing radiation, regulatory mechanisms reprogram protein synthesis to translate mRNAs encoding proteins that ensure proper cellular responses. Interestingly, beneficial responses to low-dose radiation exposure, known as radiation hormesis, have been described in several models, but the molecular mechanisms behind this phenomenon are largely unknown. In this review, we explore how differences in cellular responses to high- vs. low-dose ionizing radiation are realized through the modulation of molecular pathways with a particular emphasis on the regulation of mRNA translation control.
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A Dual Face of APE1 in the Maintenance of Genetic Stability in Monocytes: An Overview of the Current Status and Future Perspectives. Genes (Basel) 2020; 11:genes11060643. [PMID: 32545201 PMCID: PMC7349382 DOI: 10.3390/genes11060643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 12/24/2022] Open
Abstract
Monocytes, which play a crucial role in the immune system, are characterized by an enormous sensitivity to oxidative stress. As they lack four key proteins responsible for DNA damage response (DDR) pathways, they are especially prone to reactive oxygen species (ROS) exposure leading to oxidative DNA lesions and, consequently, ROS-driven apoptosis. Although such a phenomenon is of important biological significance in the regulation of monocyte/macrophage/dendritic cells’ balance, it also a challenge for monocytic mechanisms that have to provide and maintain genetic stability of its own DNA. Interestingly, apurinic/apyrimidinic endonuclease 1 (APE1), which is one of the key proteins in two DDR mechanisms, base excision repair (BER) and non-homologous end joining (NHEJ) pathways, operates in monocytic cells, although both BER and NHEJ are impaired in these cells. Thus, on the one hand, APE1 endonucleolytic activity leads to enhanced levels of both single- and double-strand DNA breaks (SSDs and DSBs, respectively) in monocytic DNA that remain unrepaired because of the impaired BER and NHEJ. On the other hand, there is some experimental evidence suggesting that APE1 is a crucial player in monocytic genome maintenance and stability through different molecular mechanisms, including induction of cytoprotective and antioxidant genes. Here, the dual face of APE1 is discussed.
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Qi Z, Guo S, Li C, Wang Q, Li Y, Wang Z. Integrative Analysis for the Roles of lncRNAs in the Immune Responses of Mouse PBMC Exposed to Low-Dose Ionizing Radiation. Dose Response 2020; 18:1559325820913800. [PMID: 32269503 PMCID: PMC7093697 DOI: 10.1177/1559325820913800] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/30/2020] [Accepted: 02/18/2020] [Indexed: 12/13/2022] Open
Abstract
It is well accepted that low-dose ionizing radiation (LDIR) modulates a variety
of immune responses that have exhibited the properties of immune hormesis.
Alterations in messenger RNA (mRNA) and long noncoding RNA (lncRNA) expression
were to crucially underlie these LDIR responses. However, lncRNAs in
LDIR-induced immune responses have been rarely reported, and its functions and
molecular mechanisms have not yet been characterized. Here, we used microarray
profiling to determine lncRNA in BALB/c mice exposed to single (0.5 Gy×1) and
chronic (0.05 Gy×10) low-dose γ-rays radiation (Co60). We observed
that a total of 8274 lncRNAs and 7240 mRNAs were altered in single LDIR, while
2077 lncRNAs and 796 mRNAs in chronic LDIR. The biological functions of these
upregulated mRNAs in both 2 groups using Gene Ontology functional and pathway
enrichment analysis were significantly enriched in immune processes and immune
signaling pathways. Subsequently, we screened out the lncRNAs involved in
regulating these immune signaling pathways and examined their potential
functions by lncRNAs-mRNAs coexpression networks. This is the first study to
comprehensively identify lncRNAs in single and chronic LDIR responses and to
demonstrate the involvement of different lncRNA expression patterns in
LDIR-induced immune signaling pathways. Further systematic research on these
lncRNAs will provide new insights into our understanding of LDIR-modulated
immune hormesis responses.
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Affiliation(s)
- Zhenhua Qi
- Department of Radiobiology, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, People's Republic of China
| | - Sitong Guo
- Department of Radiobiology, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, People's Republic of China
| | - Changyong Li
- Department of Radiobiology, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, People's Republic of China
| | - Qi Wang
- Department of Radiobiology, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, People's Republic of China
| | - Yaqiong Li
- Department of Radiobiology, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, People's Republic of China
| | - Zhidong Wang
- Department of Radiobiology, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, People's Republic of China
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Meta-analytic evidence for the anti-aging effect of hormesis on Caenorhabditis elegans. Aging (Albany NY) 2020; 12:2723-2746. [PMID: 32031985 PMCID: PMC7041774 DOI: 10.18632/aging.102773] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 01/12/2020] [Indexed: 11/26/2022]
Abstract
Mild stress-induced hormesis, as a promising strategy to improve longevity and healthy aging, meets both praise and criticism. To comprehensively assess the applicability of hormesis in aging intervention, this meta-analysis was conducted focusing on the effect of hormesis on Caenorhabditis elegans. Twenty-six papers involving 198 effect size estimates met the inclusion criteria. Meta-analytic results indicated that hormesis could significantly extend the mean lifespan of C. elegans by 16.7% and 25.1% under normal and stress culture conditions (p < 0.05), respectively. The healthspan assays showed that hormesis remarkably enhanced the bending frequency and pumping rate of worms by 28.9% and 7.0% (p < 0.05), respectively, while effectively reduced the lipofuscin level by 15.9% (p < 0.05). The obviously increased expression of dauer formation protein-16 (1.66-fold) and its transcriptional targets, including superoxide dismutase-3 (2.46-fold), catalase-1 (2.32-fold) and small heat shock protein-16.2 (2.88-fold) (p < 0.05), was one of the molecular mechanisms underlying these positive effects of hormesis. This meta-analysis provided strong evidence for the anti-aging role of hormesis, highlighting its lifespan-prolonging, healthspan-enhancing and resistance-increasing effects on C. elegans. Given that dauer formation protein-16 was highly conservative, hormesis offered the theoretical possibility of delaying intrinsic aging through exogenous intervention among humans.
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Schröder A, Kriesen S, Hildebrandt G, Manda K. First Insights into the Effect of Low-Dose X-Ray Irradiation in Adipose-Derived Stem Cells. Int J Mol Sci 2019; 20:ijms20236075. [PMID: 31810198 PMCID: PMC6928975 DOI: 10.3390/ijms20236075] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 11/26/2019] [Accepted: 11/28/2019] [Indexed: 02/07/2023] Open
Abstract
(1) Background: Emerging interest of physicians to use adipose-derived stem cells (ADSCs) for regenerative therapies and the fact that low-dose irradiation (LD-IR ≤ 0.1 Gy) has been reported to enhance the proliferation of several human normal and bone-marrow stem cells, but not that of tumor cells, lead to the idea of improving stem cell therapies via low-dose radiation. Therefore, the aim of this study was to investigate unwanted side effects, as well as proliferation-stimulating mechanisms of LD-IR on ADSCs. (2) Methods: To avoid donor specific effects, ADSCs isolated from mamma reductions of 10 donors were pooled and used for the radiobiological analysis. The clonogenic survival assay was used to classify the long-term effects of low-dose radiation in ADSCs. Afterwards, cytotoxicity and genotoxicity, as well as the effect of irradiation on proliferation of ADSCs were investigated. (3) Results: LD (≤ 0.1 Gy) of ionizing radiation promoted the proliferation and survival of ADSCs. Within this dose range neither geno- nor cytotoxic effects were detectable. In contrast, greater doses within the dose range of >0.1–2.0 Gy induced residual double-strand breaks and reduced the long-term survival, as well as the proliferation rate of ADSCs. (4) Conclusions: Our data suggest that ADSCs are resistant to LD-IR. Furthermore, LD-IR could be a possible mediator to improve approaches of stem cells in the field of regenerative medicine.
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Dahal S, Budoff MJ. Low-dose ionizing radiation and cancer risk: not so easy to tell. Quant Imaging Med Surg 2019; 9:2023-2026. [PMID: 31929978 DOI: 10.21037/qims.2019.10.18] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Suraj Dahal
- Department of Internal Medicine, Los Angeles Biomedical Research Institute at Harbor-UCLA, CDCRC, Torrance, CA, USA
| | - Matthew J Budoff
- Department of Internal Medicine, Los Angeles Biomedical Research Institute at Harbor-UCLA, CDCRC, Torrance, CA, USA
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Re-analysis of herbal extracts data reveals that inflammatory processes are mediated by hormetic mechanisms. Chem Biol Interact 2019; 314:108844. [PMID: 31600484 DOI: 10.1016/j.cbi.2019.108844] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/30/2019] [Accepted: 10/04/2019] [Indexed: 12/25/2022]
Abstract
Using data from Schink et al. (2018), a large number of herbal extracts were assessed for their capacity to induce pro- and anti-inflammatory effects based on TLR4 expression normalized for cell viability in two immune cell models (i.e., HeLa-TLR4 transfected reporter cell line, and THP-1 monocytes) applying seven concentrations (0.01-3.0%). The analysis revealed that 70-80% of the extracts satisfying the a priori entry criteria also satisfied a priori evaluative criteria for hormetic concentration responses. These findings demonstrate that a large proportion of herbal extracts display hormetic dose responses in immune cells, indicating that hormetic mechanisms mediate pro- and anti-inflammatory processes and may provide a means to guide optimal dosing strategies. The identification of doses eliciting only anti-inflammatory therapeutic activity as well as the use of dose-variable herbal extracts in the treatment of inflammatory diseases will be challenging.
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40
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Liu X, Zhou Y, Wang S, Guan H, Hu S, Huang R, Zhou P. Impact of Low-dose Ionising Radiation on the Composition of the Gut Microbiota of Mice. Toxicol Sci 2019; 171:258-268. [PMID: 31236581 DOI: 10.1093/toxsci/kfz144] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 06/02/2019] [Accepted: 06/05/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Although the importance of the gut microbiota in the maintenance of human health has been well established, little is known about the impact of low-dose ionising radiation (exposure to a dose of less than 0.5 Gy of low linear energy transfer radiation such as γ- or X-rays [LDR]) on the composition and functional role of the gut microbiota. The aim of the present study was to investigate and compare the composition of the gut microbiota in mice exposed to LDR. METHODS AND MATERIALS Male BALB/c mice were exposed to low-dose Co60 radiation. Faecal samples taken prior to and after irradiation were used for high-throughput sequencing of 16S rRNA gene sequence amplicons. RESULTS We observed substantial changes in the composition of the gut microbiota, including alpha diversity and beta diversity, in mice exposed to LDR compared to the non-radiated control group. Moreover, at the genus level, the abundance of Clostridium, Helicobacter and Oscilibacter increased, and those of Bacteroides and Barnesiella decreased, in a time-dependent manner in the radiated groups compared to the non-radiated control group. The functional metabolic pathway analysis indicated that Bacteroides spp. and members of the other genera that were found are predicted to play roles in bacterial toxin production, DNA repair, and Type II diabetes. Furthermore, these alterations in the gut microbiota were accompanied by changes in the abundance of multiple metabolites, which were predicted to be involved in multiple signalling pathways, including glucagon, central carbon metabolism, and type II diabetes. CONCLUSIONS The possibility of microbiota-mediated pathophysiology resulting from LDR may be an as yet unrecognised hazard that merits further experimental examination. This study provides a conceptual and analytical foundation for further research into the chronic effects of LDR on human health, and points to potential novel targets for intervention to prevent the adverse effects of radiation.
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Affiliation(s)
- Xiaodan Liu
- Beijing Key Laboratory for Radiobiology, Department of Radiation Biology, Beijing Institute of Radiation Medicine, Beijing, P. R. China
| | - Yao Zhou
- Department of Occupational and Environmental Health, Xiangya School of Public Heath, Central South University, Changsha, Hunan Province, P. R. China
| | - Shaozheng Wang
- Beijing Key Laboratory for Radiobiology, Department of Radiation Biology, Beijing Institute of Radiation Medicine, Beijing, P. R. China
| | - Hua Guan
- Beijing Key Laboratory for Radiobiology, Department of Radiation Biology, Beijing Institute of Radiation Medicine, Beijing, P. R. China
| | - Sai Hu
- Beijing Key Laboratory for Radiobiology, Department of Radiation Biology, Beijing Institute of Radiation Medicine, Beijing, P. R. China
| | - Ruixue Huang
- Department of Occupational and Environmental Health, Xiangya School of Public Heath, Central South University, Changsha, Hunan Province, P. R. China
| | - Pingkun Zhou
- Beijing Key Laboratory for Radiobiology, Department of Radiation Biology, Beijing Institute of Radiation Medicine, Beijing, P. R. China.,Institute for Chemical Carcinogenesis, State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China
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Abstract
The hormesis concept demonstrates that in contrast to the toxic effect of high doses of materials, irradiation, etc., low doses of them are beneficial and, in addition, help to eliminate (prevent) the deleterious effect of high doses given after it. By this effect, it is an important factor of (human) evolution protecting man from harmful impacts, similarly to the role of immunity. However, immunity is also continuously influenced by hormetic effects of environmental [chemical (pollutions), physical (background irradiations and heat), etc.] and medical (drugs and therapeutic irradiations) and food interactions. In contrast to earlier beliefs, the no-threshold irradiation dogma is not valid in low-dose domains and here the hormesis concept is valid. Low-dose therapeutic irradiation, as well as background irradiations (by radon spas or moderately far from the epicenter of atomic bomb or nuclear facilities), is rather beneficial than destructive and the fear from them seems to be unreasonable from immunological point of view. Practically, all immune parameters are beneficially influenced by all forms of low-dose radiations.
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Affiliation(s)
- György Csaba
- 1 Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
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42
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Guéguen Y, Bontemps A, Ebrahimian TG. Adaptive responses to low doses of radiation or chemicals: their cellular and molecular mechanisms. Cell Mol Life Sci 2019; 76:1255-1273. [PMID: 30535789 PMCID: PMC11105647 DOI: 10.1007/s00018-018-2987-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 11/09/2018] [Accepted: 12/03/2018] [Indexed: 12/17/2022]
Abstract
This article reviews the current knowledge on the mechanisms of adaptive response to low doses of ionizing radiation or chemical exposure. A better knowledge of these mechanisms is needed to improve our understanding of health risks at low levels of environmental or occupational exposure and their involvement in cancer or non-cancer diseases. This response is orchestrated through a multifaceted cellular program involving the concerted action of diverse stress response pathways. These evolutionary highly conserved defense mechanisms determine the cellular response to chemical and physical aggression. They include DNA damage repair (p53, ATM, PARP pathways), antioxidant response (Nrf2 pathway), immune/inflammatory response (NF-κB pathway), cell survival/death pathway (apoptosis), endoplasmic response to stress (UPR response), and other cytoprotective processes including autophagy, cell cycle regulation, and the unfolded protein response. The coordinated action of these processes induced by low-dose radiation or chemicals produces biological effects that are currently estimated with the linear non-threshold model. These effects are controversial. They are difficult to detect because of their low magnitude, the scarcity of events in humans, and the difficulty of corroborating associations over the long term. Improving our understanding of these biological consequences should help humans and their environment by enabling better risk estimates, the revision of radiation protection standards, and possible therapeutic advances.
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Affiliation(s)
- Yann Guéguen
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PSE-SANTE, SESANE, LRTOX, B.P. no 17, 92262, Fontenay-aux-Roses Cedex, France.
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PSE-SANTE, SESANE, LRSI, Fontenay-aux-Roses, France.
| | - Alice Bontemps
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PSE-SANTE, SESANE, LRTOX, B.P. no 17, 92262, Fontenay-aux-Roses Cedex, France
| | - Teni G Ebrahimian
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PSE-SANTE, SESANE, LRTOX, B.P. no 17, 92262, Fontenay-aux-Roses Cedex, France
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Liu C, Hirakawa H, Tanaka K, Mohd Saaya F, Nenoi M, Fujimori A, Wang B. Reduction of Delayed Homologous Recombination by Induction of Radioadaptive Response in RaDR-GFP Mice (Yonezawa Effect): An Old Player With a New Role. Dose Response 2019; 17:1559325819833840. [PMID: 30858771 PMCID: PMC6402064 DOI: 10.1177/1559325819833840] [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: 11/25/2018] [Revised: 01/14/2019] [Accepted: 01/29/2019] [Indexed: 11/16/2022] Open
Abstract
Radiotherapy (RT) treats cancer effectively with high doses of ionizing radiation (IR) to killing cancer cells and shrinking tumors while bearing the risk of developing different side effects, including secondary cancer, which is most concerning for long-term health consequences. Genomic instability (GI) is a characteristic of most cancer cells, and IR-induced GI can manifest as delayed homologous recombination (HR). Radioadaptive response (RAR) is capable of reducing genotoxicity, cell transformation, mutation, and carcinogenesis, but the rational evidence describing its contributions to the reduction of radiation risk, in particular, carcinogenesis, remains fragmented. In this work, to investigate the impact of RAR on high-dose, IR-induced GI measured as delayed HR, the frequency of recombinant cells was comparatively studied under RAR-inducible and -uninducible conditions in the nucleated cells in hematopoietic tissues (bone marrow and spleen) using the Rosa26 Direct Repeat-green fluorescent protein (RaDR-GFP) homozygote mice. Results demonstrated that the frequency of recombinant cells was significantly lower in hematopoietic tissues under RAR-inducible condition. These findings suggest that reduction in delayed HR may be at least a part of the mechanisms underlying decreased carcinogenesis by RAR, and application of RAR would contribute to a more rigorous and scientifically grounded system of radiation protection in RT.
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Affiliation(s)
- Cuihua Liu
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Hirokazu Hirakawa
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Kaoru Tanaka
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | | | - Mitsuru Nenoi
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Akira Fujimori
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Bing Wang
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
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Preliminary Study of the Effect of Stereotactic Body Radiotherapy (SBRT) on the Immune System in Lung Cancer Patients Unfit for Surgery: Immunophenotyping Analysis. Int J Mol Sci 2018; 19:ijms19123963. [PMID: 30544863 PMCID: PMC6320787 DOI: 10.3390/ijms19123963] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/05/2018] [Accepted: 12/06/2018] [Indexed: 12/25/2022] Open
Abstract
An immunophenotyping analysis was performed in peripheral blood samples from seven patients with lung cancer unfit for surgery treated with stereotactic body radiotherapy (SBRT). The objective was to characterize the effect of SBRT on the host immune system. Four patients received 60 Gy (7.5 Gy × 8) and three 50 Gy (12.5 Gy × 4). Analyses were performed before SBRT, 72 h after SBRT, and at one, three, and six months after the end of SBRT. Of note, there was a specific increase of the immunoactive component of the immune system, with elevation of CD56+highCD16+ natural killer (NK) cells (0.95% at baseline to 1.38% at six months), and a decrease of the immunosuppressive component of the immune system, with decreases of CD4+CD25+Foxp3+CDA5RA- regulatory T cells (4.97% at baseline to 4.46% at six months), granulocytic myeloid-derived suppressor cells (G-MDSCs) (from 66.1% at baseline to 62.6% at six months) and monocytic (Mo-MDSCs) (8.2% at baseline to 6.2% at six months). These changes were already apparent at 72 h and persisted over six months. SBRT showed an effect on systemic immune cell populations, which is a relevant finding for supporting future combinations of SBRT with immunotherapy for treating lung cancer patients.
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Alcaraz JP, Cinquin P, Martin DK. Tackling the Concept of Symbiotic Implantable Medical Devices with Nanobiotechnologies. Biotechnol J 2018; 13:e1800102. [PMID: 30367543 DOI: 10.1002/biot.201800102] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 09/17/2018] [Indexed: 12/21/2022]
Abstract
This review takes an approach to implanted medical devices that considers whether the intention of the implanted device is to have any communication of energy or materials with the body. The first part describes some specific examples of three different classes of implants, analyzed with regards to the type of signal sent to cells. Through several examples, the authors describe that a one way signaling to the body leads to encapsulation or degradation. In most cases, those phenomena do not lead to major problems. However, encapsulation or degradation are critical for new kinds of medical devices capable of duplex communication, which are defined in this review as symbiotic devices. The concept the authors propose is that implanted medical devices that need to be symbiotic with the body also need to be designed with an intended duplex communication of energy and materials with the body. This extends the definition of a biocompatible system to one that requires stable exchange of materials between the implanted device and the body. Having this novel concept in mind will guide research in a new field between medical implant and regenerative medicine to create actual symbiotic devices.
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Affiliation(s)
- Jean-Pierre Alcaraz
- Univverity Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, F-38000 Grenoble, France.,SyNaBi, Pavillon Taillefer, Domaine de la Merci, La Tronche 38706, Grenoble, France
| | - Philippe Cinquin
- Univverity Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, F-38000 Grenoble, France.,SyNaBi, Pavillon Taillefer, Domaine de la Merci, La Tronche 38706, Grenoble, France
| | - Donald K Martin
- Univverity Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, F-38000 Grenoble, France.,SyNaBi, Pavillon Taillefer, Domaine de la Merci, La Tronche 38706, Grenoble, France
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Impact of X-ray Exposure on the Proliferation and Differentiation of Human Pre-Adipocytes. Int J Mol Sci 2018; 19:ijms19092717. [PMID: 30208657 PMCID: PMC6163807 DOI: 10.3390/ijms19092717] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 09/06/2018] [Accepted: 09/07/2018] [Indexed: 01/20/2023] Open
Abstract
Radiotherapy is a widely used treatment option for cancer patients as well as for patients with musculoskeletal disorders. Adipocytes, the dominant cell type of adipose tissue, are known to constitute an active part of the tumor microenvironment. Moreover, adipocytes support inflammatory processes and cartilage degradation in chronic inflammatory diseases, i.e., rheumatoid and osteoarthritis. Since the production of inflammatory factors is linked to their differentiation stages, we set out to explore the radiation response of pre-adipocytes that may influence their inflammatory potential and differentiation capacity. This is the first study investigating the effects of X-ray irradiation on the proliferation and differentiation capacity of human primary pre-adipocytes, in comparison to Simpson–Golabi–Behmel Syndrome (SGBS) pre-adipocytes, an often-used in vitro model of human primary pre-adipocytes. Our results demonstrate a dose-dependent reduction of the proliferation capacity for both cell strains, whereas the potential for differentiation was mostly unaffected by irradiation. The expression of markers of adipogenic development, such as transcription factors (PPARγ, C/EBPα and C/EBPβ), as well as the release of adipokines (visfatin, adiponectin and leptin) were not significantly changed upon irradiation. However, after irradiation with high X-ray doses, an increased lipid accumulation was observed, which suggests a radiation-induced response of adipocytes related to inflammation. Our results indicate that pre-adipocytes are radio-resistant, and it remains to be elucidated whether this holds true for the overall inflammatory response of adipocytes upon irradiation.
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In Vivo Irradiation of Mice Induces Activation of Dendritic Cells. Int J Mol Sci 2018; 19:ijms19082391. [PMID: 30110907 PMCID: PMC6121955 DOI: 10.3390/ijms19082391] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 08/09/2018] [Indexed: 11/17/2022] Open
Abstract
It is becoming clear that ionizing radiation positively influences certain immune parameters, which opens the possibility for combining radio- and immunotherapies in cancer treatment. The presence of functionally competent dendritic cells (DCs) is crucial in mounting a successful antitumor immune response. While it has been shown that DCs are relatively radioresistant, few and contradictory data are available on how ionizing radiation alters the functional integrity of these cells. Therefore, our objective was to investigate the effect of whole-body irradiation on the function of splenic DCs. C57Bl/6 mice were irradiated with 0.1, 0.25, and 2 Gy X-rays and changes in the phenotype of splenic DCs were compared to unirradiated controls. An increase was seen in DC surface markers influencing DC-T cell interactions. In vivo cytokine production was determined by direct intracellular cytokine staining. Irradiation with 2 Gy induced a 1.6-fold increase in IL-1α production, while the combination of irradiation and lipopolysaccharide (LPS) treatment induced a 3.9-fold increase, indicating a strong synergism between irradiation and LPS stimulation. Interaction of DCs with effector and regulatory T cells was investigated in a mixed lymphocyte reaction. While DCs from control animals induced stronger proliferation of regulatory T cells, DCs from animals irradiated with 2 Gy induced stronger proliferation of effector T cells. Antigen uptake and presentation was investigated by measuring the capacity of DCs to internalize and present ovalbumine (OVA)-derived peptides on their major histocompatibility complex (MHCI) molecules. Irradiation with 2 Gy did not influence antigen uptake or presentation, while low doses stimulated antigen uptake and reduced the level of antigen presentation. In conclusion, high-dose in vivo irradiation induced increased expression of T cell costimulatory markers, enhanced production of proinflammatory cytokines and a stronger stimulation of effector T cell proliferation than that of regulatory T cells. However, it did not influence DC antigen uptake or presentation. On the other hand, low-dose irradiation increased antigen uptake and lowered antigen presentation of DCs, indicating that low- and high-dose irradiation act on different pathways in DCs.
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Vaiserman A, Koliada A, Zabuga O, Socol Y. Health Impacts of Low-Dose Ionizing Radiation: Current Scientific Debates and Regulatory Issues. Dose Response 2018; 16:1559325818796331. [PMID: 30263019 PMCID: PMC6149023 DOI: 10.1177/1559325818796331] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/30/2018] [Accepted: 07/31/2018] [Indexed: 12/31/2022] Open
Abstract
Health impacts of low-dose ionizing radiation are significant in important fields such as X-ray imaging, radiation therapy, nuclear power, and others. However, all existing and potential applications are currently challenged by public concerns and regulatory restrictions. We aimed to assess the validity of the linear no-threshold (LNT) model of radiation damage, which is the basis of current regulation, and to assess the justification for this regulation. We have conducted an extensive search in PubMed. Special attention has been given to papers cited in comprehensive reviews of the United States (2006) and French (2005) Academies of Sciences and in the United Nations Scientific Committee on Atomic Radiation 2016 report. Epidemiological data provide essentially no evidence for detrimental health effects below 100 mSv, and several studies suggest beneficial (hormetic) effects. Equally significant, many studies with in vitro and in animal models demonstrate that several mechanisms initiated by low-dose radiation have beneficial effects. Overall, although probably not yet proven to be untrue, LNT has certainly not been proven to be true. At this point, taking into account the high price tag (in both economic and human terms) borne by the LNT-inspired regulation, there is little doubt that the present regulatory burden should be reduced.
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Shimura N, Kojima S. The Lowest Radiation Dose Having Molecular Changes in the Living Body. Dose Response 2018; 16:1559325818777326. [PMID: 29977175 PMCID: PMC6024299 DOI: 10.1177/1559325818777326] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/22/2018] [Accepted: 04/10/2018] [Indexed: 12/20/2022] Open
Abstract
We herein attempted to identify the lowest radiation dose causing molecular changes in the living body. We investigated the effects of radiation in human cells, animals, and humans. DNA double-strand breaks (DSBs) formed in cells at γ- or X-ray irradiation doses between 1 mGy and 0.5 Gy; however, the extent of DSB formation differed depending on the cell species. The formation of micronuclei (MNs) and nucleoplasmic bridges (NPBs) was noted at radiation doses between 0.1 and 0.2 Gy. Stress-responsive genes were upregulated by lower radiation doses than those that induced DNA DSBs or MN and NPBs. These γ- or X-ray radiation doses ranged between approximately 10 and 50 mGy. In animals, chromosomal aberrations were detected between 50 mGy and 0.1 Gy of low linear energy transfer radiation, 0.1 Gy of metal ion beams, and 9 mGy of fast neutrons. In humans, DNA damage has been observed in children who underwent computed tomography scans with an estimated blood radiation dose as low as 0.15 mGy shortly after examination. The frequencies of chromosomal translocations were lower in residents of high background areas than in those of control areas. In humans, systemic adaptive responses may have been prominently expressed at these radiation doses.
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Affiliation(s)
- Noriko Shimura
- Faculty of Pharmaceutical Sciences, Ohu University, Tomita-machi, Koriyama, Fukushima, Japan
| | - Shuji Kojima
- Faculty of Pharmaceutical Sciences, Department of Radiation Biosciences, Tokyo University of Science (TUS), Chiba, Japan
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Abstract
Hormesis can be explained by evolutionary adaptation to the current level of a factor present in the natural environment or to some average from the past. This pertains also to ionizing radiation as the natural background has been decreasing during the time of the life existence. DNA damage and repair are normally in a dynamic balance. The conservative nature of the DNA repair suggests that cells may have retained some capability to repair damage from higher radiation levels than that existing today. According to this concept, the harm caused by radioactive contamination would tend to zero with a dose rate tending to a wide range level of the natural radiation background. Existing evidence in favor of hormesis is substantial, experimental data being partly at variance with results of epidemiological studies. Potential bias, systematic errors, and motives to exaggerate risks from low-dose low-rate ionizing radiation are discussed here. In conclusion, current radiation safety norms are exceedingly restrictive and should be revised on the basis of scientific evidence. Elevation of the limits must be accompanied by measures guaranteeing their observance.
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Affiliation(s)
- S V Jargin
- Peoples' Friendship University of Russia, Moscow, Russian Federation
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