An oxidative stress biomarker, urinary 8-hydroxy-2′-deoxyguanosine, predicts cardiovascular-related death after steroid therapy for patients with active cardiac sarcoidosis. (1st June 2016)

• Record Type: Journal Article
• Authors: Myoren, Takeki; Kobayashi, Shigeki; Oda, Seiko; Nanno, Takuma; Ishiguchi, Hironori; Murakami, Wakako; Okuda, Shinichi; Okada, Munemasa; Takemura, Genzou; Suga, Kazuyoshi; Matsuzaki, Masunori; Yano, Masafumi
• Is Part Of: International journal of cardiology. Volume 212(2016)
• Page Start: 206
• Page End: 213
• Publication Date: 2016-06-01
• Subjects: Cardiac sarcoidosis -- Oxidative stress -- Biomarker; Cardiology -- Periodicals; Electronic journals; 616.12
• DOI: 10.1016/j.ijcard.2016.03.003
• Languages: English
• ISSNs: 0167-5273

Abstract

Abstract: Background: We investigated whether urinary 8-hydroxy-2′-deoxyguanosine (U-8-OHdG), a marker of oxidative DNA damage, is a prognosticator of cardiovascular-related death in patients with cardiac sarcoidosis (CS). Methods and results: In this prospective study, 30 consecutive patients were divided into the active CS (n = 20) and non-active CS (n = 10) groups, based on abnormal isotope accumulation in the heart on 18 F-fluorodeoxyglucose positron-emission tomography/computed tomography ( 18 F-FDG PET/CT) imaging. Nineteen patients in the active CS group underwent corticosteroid therapy. Before corticosteroid therapy initiation, U-8-OHdG, brain natriuretic peptide (BNP), other biomarkers, and indices of cardiac function were measured. Patients were followed-up for a median of 48 months. The primary endpoint was the incidence of cardiovascular-related death. During the follow-up period, in the corticosteroid-treated active CS group, 7 of 19 patients experienced cardiovascular-related death. By contrast, in the non-active CS group, 1 of 10 patients died from cardiovascular-related causes. Univariate and multivariate analyses showed that U-8-OHdG and BNP were independent predictors for cardiovascular-related death. The cut-off values for predicting cardiovascular death in corticosteroid-treated patients with active CS were 19.1 ng/mg·Cr and 209 pg/mL for U-8-OHdG and BNP, respectively. Patients with a U-8-OHdG concentration ≥ 19.1 ng/mg·Cr or a BNP concentration ≥ 209 pg/mL had a significantly higher cardiovascular-related death risk, but U-8-OHdG had better predictive value compared with BNP. Conclusion: These findings suggested that U-8-OHdG was a powerful predictor of cardiovascular-related death in patients with CS, suggesting that active CS patients with elevated U-8-OHdG levels might be resistant to corticosteroid therapy. Highlights: Urinary 8-hydroxy-2′-deoxyguanosine (U-8-OHdG) is a biomarker of oxidative stress. U-8-OHdG levels were higher in active cardiac sarcoidosis (CS) than in non-active CS. U-8-OHdG was an independent predictor for cardiovascular-related death in active CS patients. CS patients with elevated U-8-OHdG levels might be resistant to corticosteroid therapy.