Germain, Arnaud, Jaycox, Jillian R, Emig, Christopher J et al. · International journal of molecular sciences · 2025 · DOI
This study looked for specific immune proteins called autoantibodies in the blood of ME/CFS patients to see if they might be causing the illness. Researchers tested over 7,500 different immune markers using advanced laboratory techniques in 172 people. Surprisingly, they did not find significant differences in autoantibodies between ME/CFS patients and healthy controls, though they did notice some subtle patterns between men and women with ME/CFS that warrant further investigation.
Understanding whether autoantibodies drive ME/CFS is critical for developing targeted treatments and establishing disease mechanisms. This large-scale antigen profiling study provides important negative data that challenges previous autoantibody hypotheses, prompting the field to reconsider disease mechanisms or explore whether autoimmune pathology may be stratified by patient subgroups such as sex.
This study does not prove that autoantibodies play no role in ME/CFS—negative results in one cohort do not exclude autoimmunity in other patient subsets or disease phases. The cross-sectional design cannot establish causation or temporal relationships. The study also does not rule out the possibility that autoantibodies contribute to ME/CFS in specific patient subgroups (e.g., defined by sex or disease duration) that were not adequately powered in this analysis.
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 →
The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.
Primary citation
Germain, Arnaud, Jaycox, Jillian R, Emig, Christopher J, Ring, Aaron M, & Hanson, Maureen R (2025). An In-Depth Exploration of the Autoantibody Immune Profile in ME/CFS Using Novel Antigen Profiling Techniques.. International journal of molecular sciences. https://doi.org/10.3390/ijms26062799
BibTeX
@article{mecfsatlas-germain-2025-depth-exploration,
author = {Germain, Arnaud and Jaycox, Jillian R and Emig, Christopher J and Ring, Aaron M and Hanson, Maureen R},
title = {An In-Depth Exploration of the Autoantibody Immune Profile in ME/CFS Using Novel Antigen Profiling Techniques.},
journal = {International journal of molecular sciences},
year = {2025},
doi = {10.3390/ijms26062799},
note = {PubMed: 40141440},
url = {https://www.mecfsatlas.com/evidence/germain-2025-depth-exploration},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/germain-2025-depth-exploration
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