Op De Beéck, Katrijn, Maes, Liesbeth, Van den Bergh, Karolien et al. · Arthritis and rheumatism · 2012 · DOI
This study looked for specific autoantibodies (immune proteins that attack the body's own cells) in people with various rheumatic diseases, including those with chronic fatigue syndrome. Researchers tested blood samples from hundreds of patients and healthy controls, measuring antibodies against different protein targets called hnRNPs. They found that people with Sjögren's syndrome (an autoimmune disease affecting glands) had significantly more of these antibodies compared to healthy people.
This research is relevant to ME/CFS because the study included chronic fatigue syndrome patients as a control group, allowing comparison of autoantibody profiles between CFS and connective tissue diseases. Understanding autoantibody patterns may help clarify whether ME/CFS shares autoimmune features with diseases like Sjögren's syndrome, which could inform diagnostic approaches and potential mechanisms.
This study does not prove that hnRNP autoantibodies cause Sjögren's syndrome or other rheumatic diseases—it only documents their association. The study does not establish whether CFS patients have elevated hnRNP autoantibodies compared to healthy controls, nor does it clarify the functional significance of these antibodies in disease pathogenesis. Cross-sectional design limits causal inference.
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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