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DNA DSB Repair, Mitochondrial Dysfunctions and Modulation Pathways after Exposure to Ionizing Radiation

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Biochemistry".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 3255

Special Issue Editors


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Guest Editor
Scientific Director of the Laboratory of Radiation Molecular Biology, Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences (RAS), Moscow, Russia
Interests: radiation damage and DNA repair; pathways to preserving mitochondrial DNA; mitochondrial dysfunction; radiation mutagenesis; anti-mutagenesis; anti-carcinogenesis; extracellular circulating DNA; NUMT pseudogenes; free radicals and antioxidants; radioprotectors und radiomitigators; aging and geroprotectors

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Guest Editor
Head of the Laboratory of Radiation Biology of the Joint Institute for Nuclear Research, Dubna, Russia

Special Issue Information

Dear Colleagues,

We are pleased to announce the release of a Special Issue of the International Journal of Molecular Sciences on the topic of DNA DSB repair in the context of chromatin and mitochondrial dysfunctions in cells after exposure to ionizing radiation, and pathways of their modulation. We invite authors to submit your original scientific articles as well as thematic reviews.

As the results of many studies show, the induction of DNA double-strand breaks (DSB) and mitochondrial dysfunction, with increased oxidative stress, can be considered two critical events leading to cell death or the development of long-term consequences due to ionizing radiation (IR). Although there are significant achievements in this direction, additional knowledge is still required, using experimental models in vitro and in vivo. Further expansion of knowledge on these issues is of interest both for finding a means to reduce radiation damage and for improving the effectiveness of radiation therapy for cancer. Nuclear–mitochondrial signaling communications play an important role in cell survival and death. However, research in this aspect also requires further development after radiation exposure. Structural and functional disorders in mitochondria induced by IR lead to the development of a whole complex of effects at the level of cells and the whole organism. The mechanisms of repair of complex cluster DNA damage in mammalian cells induced by heavy densely ionizing particles have not yet been sufficiently elucidated. It is important to develop research to elucidate the repair of cluster DSB of DNA in the context of chromatin. The search for ways to modulate DSB of DNA repair and mitochondrial dysfunction, as well as studies on mitochondria-targeted radiomitigators, also remain very relevant.

Prof. Azhub Gaziev
Prof. Dr. Krasavin Evgeniy
Guest Editors

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Keywords

  • radiation damage and DNA repair
  • cluster DSB of DNA
  • pathways to preserve mitochondrial DNA (mtDNA)
  • mitochondrial dysfunction
  • mtDNA mutagenesis
  • mitochondrial ROS
  • degradation mtDNA
  • extracellular circulating DNA
  • mitophagy and mitogenesis
  • radioprotectors and radiomitigators

Published Papers (1 paper)

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Research

17 pages, 2547 KiB  
Article
The Ability of the Nitric Oxide Synthases Inhibitor T1023 to Selectively Protect the Non-Malignant Tissues
by Marina Filimonova, Alina Saburova, Victoria Makarchuk, Ljudmila Shevchenko, Valentina Surinova, Vadim Yuzhakov, Nina Yakovleva, Larisa Sevankaeva, Vyacheslav Saburov, Sergey Koryakin, Petr Shegay, Andrey Kaprin, Sergey Ivanov and Alexander Filimonov
Int. J. Mol. Sci. 2021, 22(17), 9340; https://0-doi-org.brum.beds.ac.uk/10.3390/ijms22179340 - 28 Aug 2021
Cited by 3 | Viewed by 2717
Abstract
Previously, we showed that a nitric oxide synthase (NOS) inhibitor, compound T1023, induces transient hypoxia and prevents acute radiation syndrome (ARS) in mice. Significant efficacy (according to various tests, dose modifying factor (DMF)—1.6–1.9 against H-ARS/G-ARS) and safety in radioprotective doses (1/5–1/4 LD10) became [...] Read more.
Previously, we showed that a nitric oxide synthase (NOS) inhibitor, compound T1023, induces transient hypoxia and prevents acute radiation syndrome (ARS) in mice. Significant efficacy (according to various tests, dose modifying factor (DMF)—1.6–1.9 against H-ARS/G-ARS) and safety in radioprotective doses (1/5–1/4 LD10) became the reason for testing its ability to prevent complications of tumor radiation therapy (RT). Research methods included studying T1023 effects on skin acute radiation reactions (RSR) in rats and mice without tumors and in tumor-bearing animals. The effects were evaluated using clinical, morphological and histological techniques as well as RTOG classification. T1023 administration prior to irradiation significantly limited the severity of acute RSR. This was due to a decrease in radiation alteration of the skin and underlying tissues, and the preservation of the functional activity of cell populations that are critical in the pathogenesis of radiation burn. The DMF values for T1023 for skin protection were 1.4–1.7. Moreover, its radioprotective effect was fully selective to normal tissues in RT models of solid tumors—T1023 reduced the severity of acute RSR and did not modify the antitumor effects of γ-radiation. The results indicate that T1023 can selectively protect the non-malignant tissues against γ-radiation due to hypoxic mechanism of action and potentiate opportunities of NOS inhibitors in RT complications prevention. Full article
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