ter Wolbeek, Maike, van Doornen, Lorenz J P, Schedlowski, Manfred et al. · Psychoneuroendocrinology · 2008 · DOI
This study looked at whether teenagers with severe fatigue have differences in how their immune cells respond to stress hormones called cortisol and dexamethasone. Researchers tracked 65 fatigued girls and 60 non-fatigued girls over a year, measuring their stress hormone levels and testing immune cell responses. They found that only girls whose fatigue persisted had reduced immune cell sensitivity to these stress hormones, suggesting that long-lasting fatigue may involve a specific change in how the immune system responds to stress.
This research provides evidence that ME/CFS-like symptoms in adolescents may involve measurable changes in how immune cells respond to stress hormones, particularly when fatigue becomes persistent. Understanding this immune-neuroendocrine dysfunction could help explain why some fatigued individuals recover while others develop chronic illness, and may eventually guide treatment development targeting these specific immune abnormalities.
This study does not prove that altered glucocorticoid sensitivity causes ME/CFS or chronic fatigue—it only shows an association in persistently fatigued individuals. The findings cannot be generalized to adults with ME/CFS or to individuals with different symptom presentations. Additionally, the small size of the persistently fatigued subgroup limits confidence in those specific findings.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
Spotted an error in this entry? Report it →