Oxidative stress is enhanced in correlation with renal dysfunction: examination with the redox state of albumin.

Hiroyuki Terawaki, Kazunobu Yoshimura, Toshio Hasegawa, Yukie Matsuyama, Tsuneo Negawa, Kenichi Yamada, Masato Matsushima, Masaaki Nakayama, Tatsuo Hosoya, Seiichi Era

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171 Citations (Scopus)

Abstract

BACKGROUND: Cardiovascular disease is known to be the most important complication among patients with renal failure, and oxidative stress has been proposed to play a major role as the source of such complications. Human serum albumin (HSA) is composed of human mercaptoalbumin (HMA) with cysteine residues having reducing powers, of reversibly oxidized human non-mercaptoalbumin-1 (HNA-1), and strongly oxidized human non-mercaptoalbumin-2 (HNA-2). METHODS: We used the "redox state of HSA" as a marker to investigate the current status of oxidative stress in predialysis patients with renal failure. The subjects were 55 nondialysis patients (31 males and 24 females) with chronic renal diseases, and having various degrees of renal function. The subjects' redox state of HSA was determined by a high-performance liquid chromatographic (HPLC) procedure, and the results presented in terms of the ratios between HNA-total(HNA-1 + HNA-2) and HNA-2. RESULTS: The values for each fraction of HNA-total (f(HNA-total)) and f(HNA-2) were increased with a decrease of renal functions, and a significant positive correlation with serum creatinine (R= 0.529, P < 0.0001 and R= 0.618, P < 0.0001) was detected. Multiple (forward stepwise) regression analysis using f(HNA-total) and f(HNA-2) as the criterion variables was performed, and creatinine was adopted as significant explanatory variable in both equations. CONCLUSION: We found that even before dialysis, oxidative stress was enhanced in correlation with the level of renal dysfunction among patients with chronic renal failure. In the future, antioxidant strategies should become part of treatment for predialysis renal failure.

Original languageEnglish
Pages (from-to)1988-1993
Number of pages6
JournalKidney international
Volume66
Issue number5
DOIs
Publication statusPublished - 2004 Nov

ASJC Scopus subject areas

  • Nephrology

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