Sommerfeldt, Line, Portilla, Helene, Jacobsen, Line et al. · Acta paediatrica (Oslo, Norway : 1992) · 2011 · DOI
This study looked at genetic differences in genes that control how the body responds to stress and manages heart rate and blood pressure in teenagers with ME/CFS. Researchers found that people with ME/CFS were more likely to have certain genetic variations in two specific genes (COMT and the β₂-adrenergic receptor) compared to healthy people. These genetic differences may affect how well the body's autonomic nervous system (which controls automatic body functions) works during physical stress.
Understanding genetic factors in ME/CFS autonomic dysfunction could help identify biological subtypes of the disease and explain why some patients experience cardiovascular symptoms like dizziness and heart palpitations. This research supports the biological basis of ME/CFS and may eventually enable genetic screening to predict who is at risk or to develop targeted treatments based on individual genetic profiles.
This study does not prove that these genetic polymorphisms cause ME/CFS—it only shows an association in a small sample of adolescents. The findings are correlational rather than causal, and the small sample size and lack of longitudinal follow-up limit generalizability. These genetic variations may be risk factors or markers rather than direct causes of disease.
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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