HLA and pathogens in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) and other post-infection conditions.
Georgopoulos, Apostolos P, James, Lisa M, Peterson, Philip K · Scientific reports · 2025 · DOI
Quick Summary
This study explores why some people develop ME/CFS after viral infections while others don't. Researchers looked at immune system genes (HLA types) and tested how well they recognize and fight nine common human herpes viruses. They found that people with certain HLA types have weak immune recognition of these viruses, potentially allowing the viruses to persist and cause ME/CFS, while people with other HLA types have strong recognition and protection.
Why It Matters
This study provides a mechanistic hypothesis for why certain genetic factors increase ME/CFS susceptibility, potentially explaining why some people recover from viral infections while others develop chronic illness. Understanding these immunogenetic differences could eventually lead to better risk stratification and personalized treatment approaches. The findings also suggest commonalities between ME/CFS, Long COVID, and post-treatment Lyme disease syndrome, which may accelerate research into shared biological mechanisms.
Observed Findings
- Susceptibility HLA alleles (C*07:04, DQB1*03:03) showed significantly weaker binding affinity to all nine human herpes virus antigens compared to protective alleles (B*08:01, DPB1*02:01), with P<0.001.
- No strong HLA-antigen binding was predicted for susceptibility alleles, whereas protective alleles demonstrated strong binding to multiple HHV antigens.
- Susceptibility alleles showed weak binding to SARS-CoV-2 glycoprotein and Borrelia burgdorferi proteins, similar to their HHV binding patterns.
- Protective alleles demonstrated strong binding to SARS-CoV-2 and Borrelia burgdorferi antigens, consistent with their HHV binding profiles.
Inferred Conclusions
- Weak HLA-antigen binding may permit viral persistence and contribute to ME/CFS development, while strong binding facilitates antigen elimination and protection.
- ME/CFS, Long COVID, and post-treatment Lyme disease syndrome may share a common immunogenetic mechanism involving inadequate HLA presentation of pathogenic antigens.
- The host's HLA immunogenetic makeup modulates the effect of viral infections in ME/CFS pathogenesis.
Remaining Questions
- Do predicted HLA-binding differences translate to functional differences in actual immune response in ME/CFS patients?
- What additional immunogenetic and environmental factors beyond HLA contribute to ME/CFS susceptibility and persistence?
- Can HLA typing be used clinically to identify individuals at higher risk for developing ME/CFS after infection?
- What is the role of viral persistence versus dysregulated immune activation in producing ME/CFS symptoms in individuals with weak-binding HLA alleles?
What This Study Does Not Prove
This computational study does not prove that HLA types cause ME/CFS or that viral persistence definitively triggers the disease—it shows only that binding predictions differ between alleles. The study does not establish causation and cannot account for many other factors affecting immune response, such as viral load, immune activation patterns, or genetic variation outside HLA genes. Clinical validation through studies in actual ME/CFS patients would be needed to confirm these theoretical predictions affect real-world disease development.
Topics
Tags
Metadata
- DOI
- 10.1038/s41598-025-21230-z
- PMID
- 41136524
- Review status
- Editor reviewed
- Evidence level
- Early hypothesis, preprint, editorial, or weak support
- Last updated
- 7 April 2026