Rajeevan, M S, Smith, A K, Dimulescu, I et al. · Genes, brain, and behavior · 2007 · DOI
This study looked at whether differences in a specific gene (the glucocorticoid receptor gene) might affect who develops ME/CFS. Researchers compared 40 people with ME/CFS to people without the illness and found that certain genetic variations were more common in those with ME/CFS. This gene is involved in how the body manages stress through a system called the HPA axis, which may be disrupted in ME/CFS.
This research provides genetic evidence supporting the hypothesis that HPA axis dysfunction contributes to ME/CFS pathophysiology, potentially offering a biological mechanism for the illness rather than a purely psychological explanation. Understanding these genetic variants could eventually help identify individuals at risk, guide treatment approaches targeting HPA axis regulation, and validate that ME/CFS has a biological basis.
This study does not prove that these genetic variations cause ME/CFS—only that they are associated with it. The findings do not explain how or why these genetic differences lead to illness, nor do they rule out the involvement of environmental triggers or other genetic factors. Association in a population-based sample does not establish that these variants are sufficient or necessary for ME/CFS development.
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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