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  • Title: Association of plasma thioredoxin-1 with renal tubular damage and cardiac prognosis in patients with chronic heart failure.
    Author: Otaki Y, Watanabe T, Takahashi H, Kadowaki S, Narumi T, Honda Y, Wanezaki M, Sasaki S, Tamura H, Nishiyama S, Arimoto T, Shishido T, Miyamoto T, Kubota I.
    Journal: J Cardiol; 2014 Nov; 64(5):353-9. PubMed ID: 24685687.
    Abstract:
    BACKGROUND: Thioredoxin-1 (Trx-1) is an abundant 12.5 kDa redox protein expressed in almost all eukaryotic cells that protect against the development of heart failure and kidney dysfunction. Plasma Trx-1 levels are considered as a reliable marker for oxidative stress. However, it remains to be determined whether plasma Trx-1 levels can predict cardiac prognosis in patients with chronic heart failure (CHF). METHODS AND RESULTS: We measured plasma Trx-1 levels and urinary β2-microglobulin-creatinine ratio (UBCR), a marker for renal tubular damage, in 156 consecutive patients with CHF and 17 control subjects. The patients were prospectively followed for a median follow-up period of 627 days and 46 cardiac events were observed. The patients with cardiac events had significantly higher plasma Trx-1 levels and UBCR levels than the cardiac event-free patients. Multivariate Cox proportional hazard analysis revealed that an elevated Trx-1 level was independently associated with poor outcome in patients with CHF after adjustment for confounding factors (hazard ratio, 1.74; 95% confidence interval, 1.33-2.29; p < 0.0001). UBCR was increased with higher plasma Trx-1 levels. Kaplan-Meier analysis demonstrated that the highest Trx-1 tertile was associated with the highest risk of cardiac events. CONCLUSION: Plasma Trx-1 level was associated with renal tubular damage and cardiac prognosis, suggesting that it could be a useful marker to identify patients at high risk for comorbid heart failure and renal tubular damage.
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