| Full text | |
| Author(s): |
Cadet, Jean
;
Davies, Kelvin J. A.
;
Medeiros, Marisa H. G.
;
Di Masciod, Paolo
;
Richard Wagner, J.
Total Authors: 5
|
| Document type: | Review article |
| Source: | Free Radical Biology and Medicine; v. 107, p. 13-34, JUN 2017. |
| Web of Science Citations: | 62 |
| Abstract | |
In this review article, emphasis is placed on the critical survey of available data concerning modified nucleobase and 2-deoxyribose products that have been identified in cellular DNA following exposure to a wide variety of oxidizing species and agents including, hydroxyl radical, one-electron oxidants, singlet oxygen, hypochlorous acid and ten-eleven translocation enzymes. In addition, information is provided about the generation of secondary oxidation products of 8-oxo-7,8-dihydroguanine and nucleobase addition products with reactive aldehydes arising from the decomposition of lipid peroxides. It is worth noting that the different classes of oxidatively generated DNA damage that consist of single lesions, intra-and interstrand cross-links were unambiguously assigned and quantitatively detected on the basis of accurate measurements involving in most cases high performance liquid chromatography coupled to electrospray ionization tandem mass spectrometry. The reported data clearly show that the frequency of DNA lesions generated upon severe oxidizing conditions, including exposure to ionizing radiation is low, at best a few modifications per 106 normal bases. Application of accurate analytical measurement methods has also allowed the determination of repair kinetics of several well-defined lesions in cellular DNA that however concerns so far only a restricted number of cases. (AU) | |
| FAPESP's process: | 12/12663-1 - Singlet molecular oxygen and peroxides in chemical biology |
| Grantee: | Paolo Di Mascio |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 13/07937-8 - Redoxome - Redox Processes in Biomedicine |
| Grantee: | Ohara Augusto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |