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- Title
Estudio del estrés oxidativo en enfermedad renal avanzada.
- Authors
Puchades Montesa, M. J.; González Rico, M. A.; Solís Salguero, M. A.; Torregrosa Maicas, I.; Tormos Muñoz, M. C.; Sáez Tormo, G.; Juan García, I.; Miguel Carrasco, A.
- Abstract
Introduction: Introduction Patients with Chronic renal Disease (CRD) often have cardiovascular disease that is the main cause of morbidity and mortality. Oxidative stress and a subclinical inflammation are crucial factors in its development. The aim of this study was to asses the oxidation of the main molecular lines in patients with advanced renal disease without dialysis and to determinate the best biomarker to asses this stress. Patients and Methods: We performed an observational study to measure the most important oxidative biomarkers in 32 patients with stage 4 CRD (MDRD = 22.1 ± 1.08 ml/min) compared with the values obtained in a control group. In peripheral lymphocytes we measured, the lipid peroxidation by Malondialdehide (MDA) and F2 Isoprostanes in plasma; protein oxidation by glutathione oxidized/reduced ratio (GSSG/GSH) in peripheral lymphocytes and protein carbonyls in plama and the oxidative damage in genetic material by modified nucleotide base 8-deoxiguanosina oxo -(8-oxo-dG), after isolating nuclear and mitochondrial DNA. We also studied the antioxidant defenses with superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione reductase (GSR) and catalase (CAT) in peripheral lymhocytes. We studied the correlation between oxidative stress and the renal function and oxidative stress and co-morbidity factors. Results: All biomarkers showed important differences in comparison lipowith the control subjects. 821.89 ± 300.47 ng/ml vs. 270 (95.66) * ng/ml (p <0.000), MDA 0.11 (0.11) * vs. 0.7 ± 0.31 nmol/mg prot (p <0.000). GSSG / GSH: 6.89 ± 1.91 vs. 1.39 ± 0.75 (p <0.000), protein carbonyls: 7.41 ± 0.84 vs. 3.63 (1.12) *. Nuclear 8-oxo-dG 7.88 (2.32) vs. 2.96 (1.78) * mitochondrial 8-oxo-dG: 15.73 ± 2.28 vs. 13.85 ± 1.44 (p <0.05). The Antioxidant enzymes also showed differences. Nuclear 8-oxo-dG demonstrated an important relationship with the rest of biomarkers, homocystein (r = 0.305, p <0.05), lipoprotein (a) (r = 0.375, p <0.01), mitochondrial 8-oxo-dG (r = 0.411, p <0.05), GSSH/GSH (r = 0.595, p <0.001) and protein carbonyls (r = 0.489, p <0.05). There was an inverse correlation with total protein (r = -0.247, p <0.01), GSH (r = -0.648, p <0.000), GSR (r = -0.563, p <0.001) and SOD (r = -0.497, p <0.000). We did not find any correlation between these parameters and renal function. The presence of diabetes or the treatment with statins did not showed significant differences. * Median (Interquartile range). Conclusion: There is an important oxidative stress in patients with advanced renal disease, probably established during early stages of disease. Of the studied parameters, the nuclear 8-oxo-dG is the best marker for oxidative stress in CRD.
- Subjects
CHRONIC kidney failure; KIDNEY disease risk factors; CARDIOVASCULAR disease related mortality; CARDIOVASCULAR diseases; PATIENTS; OXIDATIVE stress; DIALYSIS (Chemistry); LYMPHOCYTES; PEROXIDATION; PHYSIOLOGY
- Publication
Nefrologia, 2009, Vol 29, Issue 5, p464
- ISSN
0211-6995
- Publication type
Article