Dysregulated expression of tumor necrosis factor in chronic fatigue syndrome: interrelations with cellular sources and patterns of soluble immune mediator expression. — CFSMEATLAS
Dysregulated expression of tumor necrosis factor in chronic fatigue syndrome: interrelations with cellular sources and patterns of soluble immune mediator expression.
Patarca, R, Klimas, N G, Lugtendorf, S et al. · Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 1994 · DOI
Quick Summary
This study tested blood samples from 70 ME/CFS patients and compared them to healthy people. Researchers found that about 60% of ME/CFS patients had unusually high levels of immune chemicals called cytokines, particularly two types called TNF-alpha and TNF-beta. These chemicals are normally released by the body to fight infections, but in ME/CFS patients they appeared to be abnormally activated even without an active infection.
Why It Matters
This study provides early evidence that ME/CFS involves abnormal immune activation distinct from healthy controls, offering a potential biological marker for the disease. Understanding which immune cells are activated and producing these chemicals could guide future therapeutic strategies targeting excessive immune signaling.
Observed Findings
60% of ME/CFS patients had elevated levels of one or more of nine soluble immune mediators tested
TNF-alpha and TNF-beta distributions were significantly different between CFS patients and healthy controls
In CFS patients, serum TNF-alpha, IL-1α, IL-4, and sIL-2R showed significant correlations with each other
Peripheral blood mononuclear cells from CFS patients expressed mRNA for TNF-β, IL-1β, and IL-6
Only 12%-28% of CFS patients exceeded the 95th percentile for any single mediator, but combined elevation was common
Inferred Conclusions
Multiple immune cell types are activated simultaneously in ME/CFS (polycellular activation)
TNF-family cytokines show the most robust differences between CFS and healthy controls
ImmuneMarkers are interconnected in CFS patients, suggesting a coordinated immune dysregulation rather than isolated abnormalities
Measurable immune activation may be relevant to the underlying biology of ME/CFS
Remaining Questions
Do elevated cytokine levels correlate with specific ME/CFS symptoms such as post-exertional malaise or cognitive impairment?
What This Study Does Not Prove
This study does not prove that elevated cytokines cause ME/CFS symptoms or fatigue, only that they are associated with the disease. Correlation between these immune markers and specific symptoms was not measured. The study cannot determine whether immune activation is a primary driver of disease or a secondary consequence of another underlying process.
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 →