Plasma IL-6, its soluble receptors and F-2-isoprostanes at rest and during exercise in chronic fatigue syndrome

M. Robinson, S. R. Gray, M. S. Watson, G. Kennedy, A. Hill, J. J. F. Belch, M. A. Nimmo

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    Abstract

    The aim of the current study was to investigate the levels of interleukin-6 (IL-6), its soluble receptors (sIL-6R and sgp130) and F-2-isoprostanes, at rest and during exercise, in patients with chronic fatigue syndrome (CFS). Six male CFS patients and six healthy controls performed an incremental exercise test to exhaustion and a submaximal exercise bout to exhaustion. Blood samples taken in the submaximal test at rest, immediately post-exercise and 24 h post-exercise were analyzed for IL-6, sIL-6R, sgp130 and F-2-isoprostanes. A further 33 CFS and 33 healthy control participants gave a resting blood sample for IL-6 and sIL-6R measurement. During the incremental exercise test only power output at the lactate threshold was lower (P < 0.05) in the CFS group. F-2-isoprostanes were higher (P < 0.05) in CFS patients at rest and this difference persisted immediately and 24 h post-exercise. The exercise study found no differences in IL-6, sIL-6R or sgp130 at any time point between groups. In the larger resting group, there were no differences in IL-6 and sIL-6R between CFS and control groups. This investigation has demonstrated that patients with CFS do not have altered plasma levels of IL-6, sIL-6R or sgp130 either at rest or following exercise. F-2-isoprostanes, however, were consistently higher in CFS patients.

    Original languageEnglish
    Pages (from-to)282-290
    Number of pages9
    JournalScandinavian Journal of Medicine & Science in Sports
    Volume20
    Issue number2
    DOIs
    Publication statusPublished - Apr 2010

    Keywords

    • oxidative stress
    • cytokines
    • OXIDATIVE STRESS
    • INTERLEUKIN-6
    • HUMANS
    • CYTOKINE
    • GP130
    • PERFORMANCE
    • EXPRESSION
    • HEALTHY
    • COMPLEX
    • PEOPLE

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