Powell, R, Ren, J, Lewith, G et al. · Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology · 2003 · DOI
This study looked for differences in how genes are turned on or off in immune cells from ME/CFS patients compared to healthy people. Researchers found 12 genes that were more active in ME/CFS patients' immune cells, including two genes known to be involved when immune cells become activated. This supports the idea that ME/CFS may involve immune system changes.
This study provides molecular evidence that ME/CFS involves detectable changes in immune cell gene expression, potentially supporting the development of biological markers for diagnosis. Identifying specific genes dysregulated in ME/CFS could help validate the disease at a molecular level and guide future therapeutic targets.
This study does not prove that these gene expression changes cause ME/CFS—they may be consequences of the disease or related to lifestyle factors. The small sample size and lack of longitudinal data mean we cannot determine whether these expression patterns are stable biomarkers or fluctuate over time. Identifying activated lymphocyte genes does not explain the mechanism by which immune activation leads to the symptoms of ME/CFS.
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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