Przybylowicz, Patrycja Kamila, Sokolowska, Katarzyna Ewa, Rola, Hubert et al. · Journal of pain research · 2023 · DOI
This study looked at chemical changes called 'methylation' in the blood cells of people with fibromyalgia and chronic fatigue syndrome. Researchers combined data from three previous studies and found that while the specific methylation patterns differed slightly between studies, they consistently affected genes involved in body processes that could explain symptoms like pain and exhaustion. This suggests that methylation changes may play a role in how these conditions develop.
ME/CFS lacks established genetic biomarkers, so understanding epigenetic mechanisms is crucial for disease pathogenesis and potential therapeutic targets. This meta-analytic approach identifies biological pathways consistently altered across independent populations, providing stronger evidence that methylation changes are mechanistically relevant rather than spurious findings.
This study does not establish causation—methylation changes may be consequences rather than drivers of FM/CFS. The meta-analysis approach cannot definitively resolve why individual methylation sites differ across studies, nor does it identify specific methylation changes suitable for clinical diagnostics. Correlation at the pathway level does not prove these methylation changes are necessary or sufficient for disease 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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