期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 20, 期 16, 页码 -出版社
MDPI
DOI: 10.3390/ijms20163998
关键词
quasi-free electron; solvated electron; low energy electrons; ion-beam radiation; radiosensitization
资金
- National Institutes of Health [RO1CA045424]
- National Science Foundation [CHE-1920110]
This review article provides a concise overview of electron involvement in DNA radiation damage. The review begins with the various states of radiation-produced electrons: Secondary electrons (SE), low energy electrons (LEE), electrons at near zero kinetic energy in water (quasi-free electrons, (e(qf)(-))) electrons in the process of solvation in water (presolvated electrons, e(pre)(-)), and fully solvated electrons (e(aq)(-)). A current summary of the structure of e(aq)(-), and its reactions with DNA-model systems is presented. Theoretical works on reduction potentials of DNA-bases were found to be in agreement with experiments. This review points out the proposed role of LEE-induced frank DNA-strand breaks in ion-beam irradiated DNA. The final section presents radiation-produced electron-mediated site-specific formation of oxidative neutral aminyl radicals from azidonucleosides and the evidence of radiosensitization provided by these aminyl radicals in azidonucleoside-incorporated breast cancer cells.
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