Infection Elicited Autoimmunity and Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: An Explanatory Model.
Blomberg, Jonas, Gottfries, Carl-Gerhard, Elfaitouri, Amal et al. · Frontiers in immunology · 2018 · DOI
Quick Summary
This study proposes that ME/CFS may develop when a person's immune system mistakenly attacks their own body after an infection, particularly affecting energy production in muscles and the brain. The researchers suggest that some people may have a genetic tendency to develop these harmful immune responses, especially when their gut bacteria are out of balance. When exposed to a triggering infection, the immune system can begin attacking proteins involved in energy metabolism and nerve function, leading to the exhaustion and post-exertion symptoms that characterize ME/CFS.
Why It Matters
This study offers a unifying biological framework for understanding ME/CFS pathogenesis, moving beyond the longstanding characterization of the disease as primarily psychological. By proposing specific immunological mechanisms and testable hypotheses, the model provides direction for future research that could eventually lead to diagnostic biomarkers and targeted treatments. Understanding the autoimmune component may help validate ME/CFS as an organic disease and improve clinical recognition.
Observed Findings
ME/CFS frequently develops during or after infections, suggesting infectious triggers
Genetic predisposition and dysbiosis appear to be prerequisite conditions for disease development
Autoimmune markers and postexertional malaise suggest immune-mediated dysfunction of energy metabolism
Comorbidities including fibromyalgia, thyroid disorders, and orthostatic hypotension cluster with ME/CFS consistent with autoimmune mechanisms
B cell clones showing autoreactive properties have been identified in some ME/CFS patients
Inferred Conclusions
Infection-triggered autoimmunity provides a biologically plausible explanation for ME/CFS pathogenesis that integrates genetic, microbiological, and immunological evidence
Autoreactive B cells targeting aerobic metabolism and neuronal proteins represent key mechanistic mediators of postexertional malaise and neurological symptoms
Genetic predisposition combined with dysbiosis creates a permissive state for pathogenic autoimmune responses following infectious exposure
Immunoglobulin sequencing could reveal the evolution and specificity of pathogenic B cell clones driving disease
Remaining Questions
Which specific autoantigens and epitopes are targeted by pathogenic B and T cells in ME/CFS?
What This Study Does Not Prove
This model is theoretical and does not establish causation through direct experimental evidence—it synthesizes existing literature rather than presenting new data. The study does not prove that infection-triggered autoimmunity is the cause in all or even most ME/CFS cases, as it acknowledges multiple potential mechanisms. It also does not identify specific autoantigens definitively or explain why some exposed individuals develop disease while others do not.
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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How do genetic predisposition factors interact with dysbiosis to create susceptibility, and are these factors reversible?
Why do some individuals with identical genetic and infectious exposures develop ME/CFS while others remain asymptomatic?
What distinguishes a triggering infection from routine infections, and are there specific pathogen characteristics or host factors that determine progression to disease?