PMID- 28420072 OWN - NLM STAT- MEDLINE DCOM- 20180507 LR - 20180507 IS - 1477-0962 (Electronic) IS - 0961-2033 (Linking) VI - 26 IP - 10 DP - 2017 Sep TI - Reduction of nitric oxide and DNA/RNA oxidation products are associated with active disease in systemic lupus erythematosus patients. PG - 1106-1111 LID - 10.1177/0961203317692436 [doi] AB - The aims of the present study were to evaluate biomarkers of oxidative and nitrosative stress in systemic lupus erythematosus (SLE) patients, in particular products of DNA/RNA oxidative damage and their correlation with disease activity. This study included 188 controls and 203 patients; 153 with inactive SLE (SLEDAI < 6) and 50 with active SLE (SLEDAI >/= 6) without renal impairment. Oxidative stress was assessed by tert-butyl hydroperoxide-initiated by chemiluminescence, advanced oxidation protein products (AOPP), total radical-trapping antioxidant parameter (TRAP), nitric oxide metabolites (NOx), and DNA/RNA oxidation products. Patients with SLE showed increased oxidative stress, as demonstrated by the augmentation of lipid hydroperoxides ( p < 0.0001) and AOPP ( p < 0.001) and reduced total antioxidant capacity ( p < 0.0001), without differences between patients with active disease and in remission. NOx levels and DNA/RNA oxidation products were inversely and independently associated with disease activity ( p < 0.0001 and p = 0.021, respectively), regardless of BMI and prednisone use. The linear regression analysis showed that about 5% of the SLEDAI score can be explained by the levels of DNA/RNA oxidation products ( r(2):0.051; p = 0.002) and about 9% of this score by the levels of NOx ( r(2):0.091; p < 0.0001). This study provides evidence for an inverse association between serum NOx levels and DNA/RNA oxidation products and SLE disease activity, suggesting that oxidative/nitrosative stress markers may be useful in evaluating SLE disease activity and progression of the disease. FAU - Iriyoda, T M V AU - Iriyoda TMV AD - 1 Department of Rheumatology, Pontificia Universidade Catolica (PUC) do Parana, Brazil. FAU - Stadtlober, N AU - Stadtlober N AD - 2 Post Graduate Program in Experimental Pathology, University of Londrina (UEL), Brazil. FAU - Lozovoy, M A B AU - Lozovoy MAB AD - 3 Department of Pathology, Clinical Analysis and Toxicology, University of Londrina (UEL), Brazil. FAU - Delongui, F AU - Delongui F AD - 4 Post Graduate Program in Health Sciences, University of Londrina (UEL), Brazil. FAU - Costa, N T AU - Costa NT AD - 5 Department of Rheumatology, University of Londrina (UEL), Brazil. FAU - Reiche, E M V AU - Reiche EMV AD - 3 Department of Pathology, Clinical Analysis and Toxicology, University of Londrina (UEL), Brazil. FAU - Dichi, I AU - Dichi I AD - 6 Department of Internal Medicine, University of Londrina (UEL), Brazil. FAU - Simao, A N C AU - Simao ANC AD - 3 Department of Pathology, Clinical Analysis and Toxicology, University of Londrina (UEL), Brazil. LA - eng PT - Journal Article DEP - 20170322 PL - England TA - Lupus JT - Lupus JID - 9204265 RN - 0 (Antioxidants) RN - 0 (Biomarkers) RN - 0 (Glucocorticoids) RN - 31C4KY9ESH (Nitric Oxide) RN - 63231-63-0 (RNA) RN - 9007-49-2 (DNA) RN - VB0R961HZT (Prednisone) SB - IM MH - Adult MH - Antioxidants/metabolism MH - Biomarkers/metabolism MH - Case-Control Studies MH - DNA/metabolism MH - Disease Progression MH - Female MH - Glucocorticoids/therapeutic use MH - Humans MH - Linear Models MH - Lupus Erythematosus, Systemic/drug therapy/*physiopathology MH - Male MH - Middle Aged MH - Nitric Oxide/*metabolism MH - Nitrosative Stress/*physiology MH - Oxidation-Reduction MH - Oxidative Stress/*physiology MH - Prednisone MH - RNA/metabolism MH - Severity of Illness Index OTO - NOTNLM OT - DNA oxidation OT - RNA oxidation OT - SLEDAI OT - Systemic lupus erythematosus OT - nitric oxide OT - oxidative stress EDAT- 2017/04/20 06:00 MHDA- 2018/05/08 06:00 CRDT- 2017/04/20 06:00 PHST- 2017/04/20 06:00 [pubmed] PHST- 2018/05/08 06:00 [medline] PHST- 2017/04/20 06:00 [entrez] AID - 10.1177/0961203317692436 [doi] PST - ppublish SO - Lupus. 2017 Sep;26(10):1106-1111. doi: 10.1177/0961203317692436. Epub 2017 Mar 22.