Ionizing radiation-induced oxidative stress, epigenetic changes and genomic instability: The pivotal role of mitochondria

2014 ◽  
Vol 91 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Irena Szumiel
2021 ◽  
Vol 19 ◽  
Author(s):  
Tapan Behl ◽  
Gagandeep Kaur ◽  
Aayush Sehgal ◽  
Gokhan Zengin ◽  
Sukhbir Singh ◽  
...  

Background: Ionizing radiation from telluric sources is unceasingly an unprotected pitfall to humans. Thus, the foremost contributors to human exposure are global and medical radiations. Various pieces of evidences assembled during preceding years reveal the pertinent role of ionizing radiation-induced oxidative stress in the progression of neurodegenerative insults such as Parkinson’s disease, which have been contributing to increased proliferation and generation of reactive oxygen species. Objective: This review delineates the role of ionizing radiation-induced oxidative stress in Parkinson’s disease and proposes novel therapeutic interventions of flavonoid family offering effective management and slowing down the progression of Parkinson’s disease. Method: Published papers were searched via MEDLINE, PubMed, etc. published to date for in-depth database collection. Results: The potential of oxidative damage may harm the non-targeted cells. It can also modulate the functions of central nervous system, such as protein misfolding, mitochondria dysfunction, increased levels of oxidized lipids, and dopaminergic cell death, which accelerates the progression of Parkinson’s disease at the molecular, cellular, or tissue levels. In Parkinson’s disease, reactive oxygen species exacerbate the production of nitric oxides and superoxides by activated microglia, rendering death of dopaminergic neuronal cell through different mechanisms. Conclusion: Rising interest has extensively engrossed on the clinical trial designs based on the plant derived family of antioxidants. They are known to exert multifarious impact either way in neuroprotection via directly suppressing ionizing radiation-induced oxidative stress and reactive oxygen species production or indirectly increasing the dopamine levels and activating the glial cells.


2001 ◽  
Vol 276 (15) ◽  
pp. 11783-11790 ◽  
Author(s):  
Sung A. Lee ◽  
Anatoly Dritschilo ◽  
Mira Jung

Ionizing radiation-induced phosphorylation of the transcription factor c-Jun is impaired in cells derived from individuals with ataxia telangiectasia (AT), in which theATMgene is mutated. We demonstrate here that ATM modulates c-Jun phosphorylation following exposure to ionizing radiation as well as treatment with CdCl2, a potent pro-oxidant. Exposure of AT and control fibroblasts to CdCl2induced a biphasic increase in c-Jun phosphorylation on serine residues 63 and 73, with the extent of the second phase being markedly greater in AT cells than in control cells. Heme oxygenase-1, a marker of oxidative stress, was also significantly induced in AT fibroblasts. Expression of recombinant ATM in AT fibroblasts, however, reduced the extent of the effects of CdCl2on both c-Jun phosphorylation and heme oxygenase-1 induction. Our data suggest that ATM contributes to oxidative stress-mediated signaling that leads to c-Jun phosphorylation by acting as a sensor of ionizing radiation-induced oxidative stress and by modulating intracellular redox homeostasis.


PLoS ONE ◽  
2014 ◽  
Vol 9 (5) ◽  
pp. e97599 ◽  
Author(s):  
Ujjal Das ◽  
Krishnendu Manna ◽  
Mahuya Sinha ◽  
Sanjukta Datta ◽  
Dipesh Kr Das ◽  
...  

2008 ◽  
Vol 36 (8) ◽  
pp. 2328-2334 ◽  
Author(s):  
Olivier Huet ◽  
Christaine Cherreau ◽  
Carole Nicco ◽  
Laurent Dupic ◽  
Marc Conti ◽  
...  

2004 ◽  
Vol 23 (2) ◽  
pp. 91-94 ◽  
Author(s):  
Eric G Wright

The paradigm of genetic alterations being restricted to direct DNA damage after exposure to ionizing radiation has been challenged by observations in which effects of ionizing radiation arise in cells that in themselves receive no radiation exposure. These effects are demonstrated in cells that are the descendants of irradiated cells (radiation-induced genomic instability) or in cells that are in contact with irradiated cells or receive certain signals from irradiated cells (radiation-induced bystander effects). Bystander signals may be transmitted either by direct intercellular communication through gap junctions, or by diffusible factors, such as cytokines released from irradiated cells. In both phenomena, the untargeted effects of ionizing radiation appear to be associated with free radical-mediated processes. There is evidence that radiation-induced genomic instability may be a consequence of, and in some cell systems may also produce, bystander interactions involving intercellular signalling, production of cytokines and free radical generation. These processes are also features of inflammatory responses that are known to have the potential for both bystander-mediated and persisting damage as well as for conferring a predisposition to malignancy. Thus, radiation-induced genomic instability and untargeted bystander effects may reflect interrelated aspects of inflammatory type responses to radiation-induced stress and injury and contribute to the variety of the pathological consequences of radiation exposures.


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