Journal
NEPHROLOGY DIALYSIS TRANSPLANTATION
Volume 25, Issue 3, Pages 879-885Publisher
OXFORD UNIV PRESS
DOI: 10.1093/ndt/gfp575
Keywords
comet assay; CRF; haemodialysis treatment; oxidative damage; uraemic state
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Funding
- Generalitat de Catalunya and the Universidad Autonoma de Tamaulipas
- Generalitat de Catalunya (CIRIT) [2009SGR-725]
- Instituto de Salud Carlos III (FIS) [PS09/01512]
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Methods: To determine the background levels of genetic damage and its specific levels of oxidative damage, a large population of 253 CRF patients (77 in dialysis) was analysed using the comet assay. The percentage of DNA in the tail was used as a measure of basal genetic damage. In addition, the use of endo III and FPG enzymes allowed us to determine the levels of specific oxidative damage in DNA bases. Results: This is the first study that uses endo III and FPG enzymes to measure oxidative damage in CRF patients. Overall genetic damage, as well as specific oxidative damage, was higher in dialysis patients than in the CRF patients with different stages of uraemic state; genetic damage increased when serum creatinine levels increased. Genomic damage in dialysis patients decreased in those patients submitted to dialysis for a long time. Conclusions: Genetic damage increases when renal function decreases, being maximum in haemodialysis patients. Although part of the observed damage can be attributed to the uraemic state itself, other individual genetic factors can influence a state of genomic instability responsible for the observed genomic damage.
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