Wyller, Vegard Bruun, Nguyen, Chinh Bkrong, Ludviksen, Judith Anita et al. · Journal of translational medicine · 2017 · DOI
This study tested whether a protein called TGF-β, which helps regulate immune and stress responses, was elevated in adolescents with ME/CFS. Researchers compared blood levels of TGF-β in 120 young ME/CFS patients to 68 healthy controls and found the protein levels were actually the same in both groups. However, they discovered that in ME/CFS patients, TGF-β levels were connected to stress hormones and fatigue severity, suggesting it may play a role in how the illness affects the body even if it's not simply 'too high.'
This study addresses a key gap by testing the most consistent cytokine finding from decades of ME/CFS research. The discovery that TGF-β relates to neuroendocrine dysfunction and fatigue may help explain how immune-endocrine interactions contribute to ME/CFS symptoms, potentially opening new avenues for understanding disease mechanisms and monitoring response to treatment.
This study does not prove that TGF-β causes ME/CFS, nor does it establish whether the observed associations are primary features of the disease or secondary responses to fatigue and activity limitation. The cross-sectional design cannot determine causality, and the correlation between TGF-β and hormonal markers does not identify TGF-β as a driver of neuroendocrine dysfunction.
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 →
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