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A potential biomarker for fatigue: oxidative stress and anti-oxidative activity

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By Sanae Fukuda et al.

Abstract

We sought to determine whether oxidative stress and anti-oxidative activity could act as biomarkers that discriminate patients with chronic fatigue syndrome (CFS) from healthy volunteers at acute and sub-acute fatigue and resting conditions.

We calculated the oxidative stress index (OSI) from reactive oxygen metabolites-derived compounds (d-ROMs) and the biological antioxidant potential (BAP). We determined changes in d-ROMs, BAP, and OSI in acute and sub-acute fatigue in two healthy groups, and compared their values at rest between patients with CFS (diagnosed by Fukuda 1994 criteria) and another group of healthy controls. Following acute fatigue in healthy controls, d-ROMs and OSI increased, and BAP decreased. Although d-ROMs and OSI were significantly higher after sub-acute fatigue, BAP did not decrease. Resting condition yielded higher d-ROMs, higher OSI, and lower BAP in patients with CFS than in healthy volunteers, but lower d-ROMs and OSI when compared with sub-acute controls. BAP values did not significantly differ between patients with CFS and controls in the sub-acute condition. However, values were significantly higher than in the resting condition for controls.

Thus, measures of oxidative stress (d-ROMS) and anti-oxidative activity (BAP) might be useful for discriminating acute, sub-acute, and resting fatigue in healthy people from patients with CFS, or for evaluating fatigue levels in healthy people.

Source: Sanae Fukuda, Junzo Nojima, Yukari Motoki, Kouzi Yamaguti, Yasuhito Nakatomi, Naoko Okawa, Kazumi Fujiwara, Yasuyoshi Watanabe, Hirohiko Kuratsune. A potential biomarker for fatigue: oxidative stress and anti-oxidative activity. Biological Psychology Available online 17 May 2016 doi:10.1016/j.biopsycho.2016.05.005  

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