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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Mouret, Stéphane Leccia, Marie-Thérèse Bourrain, Jean-Luc Douki, Thierry Beani, Jean-Claude |
| Description | Country affiliation: France Author Affiliation: Mouret S ( CEA, INAC, SCIB, UJF & CNRS, LCIB (UMR_E 3 CEA-UJF & FRE 3200), Laboratoire Lésions des Acides Nucléiques, Grenoble, France.) |
| Abstract | Delineation of the DNA-damaging properties of UVA radiation is a major issue in understanding solar carcinogenesis. Emphasis was placed in this study on the formation of cyclobutane pyrimidine dimers (CPDs), which are now well established as the most frequent UVA-induced DNA lesions in human skin. The yield of CPDs was determined by a chromatographic assay following ex vivo UVA and UVB irradiation of biopsies taken from either phototype II or IV volunteers. A clear correlation was found between the frequency of UVB-induced CPDs and both the phototype and the minimum erythemal dose (MED). Similar results were obtained for the induction of CPDs upon exposure to UVA. Moreover, an excellent correlation was observed for each donor between the yield of DNA damage induced by either UVB or UVA. These observations show that the key parameters driving UVA-induced formation of CPDs are attenuation of radiation in the skin and the number of photons reaching skin cells rather than the cellular content in photosensitizers. In addition, the results show that both MED and phototype are good predictors of the vulnerability of DNA toward UVB and UVA in the skin. This result is of importance for the identification of individuals to be extensively protected. |
| File Format | HTM / HTML |
| ISSN | 0022202X |
| e-ISSN | 15231747 |
| Journal | Journal of Investigative Dermatology |
| Issue Number | 7 |
| Volume Number | 131 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Dermatology Neoplasms, Radiation-induced Etiology Pyrimidine Dimers Metabolism Radiation Tolerance Skin Neoplasms Skin Radiation Effects Ultraviolet Rays Adverse Effects Erythema Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology Dermatology |
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