Steinau, Martin, Unger, Elizabeth R, Vernon, Suzanne D et al. · Journal of molecular medicine (Berlin, Germany) · 2004 · DOI
Researchers looked at immune cells from one ME/CFS patient and one healthy person to find differences in which genes were turned on or off. They found about 10 genes that behaved differently between the two people, with most differences present even before exercise. Many of these genes are involved in immune function, suggesting that ME/CFS may involve problems with how the immune system works.
This study identifies specific immune-related genes that may be abnormal in ME/CFS, potentially explaining the immune dysfunction many patients experience. The development of assays for these biomarkers could eventually help doctors identify and understand ME/CFS through blood tests rather than clinical judgment alone.
This study does not prove that these gene expression differences cause ME/CFS or that they are present in all ME/CFS patients—it is a case study of one person compared to one control. The findings cannot yet distinguish whether these differences are characteristic of ME/CFS, correlate with symptom severity, or represent disease biomarkers without validation in larger patient populations.
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
Steinau, Martin, Unger, Elizabeth R, Vernon, Suzanne D, Jones, James F, & Rajeevan, Mangalathu S (2004). Differential-display PCR of peripheral blood for biomarker discovery in chronic fatigue syndrome.. Journal of molecular medicine (Berlin, Germany). https://doi.org/10.1007/s00109-004-0586-4
BibTeX
@article{mecfsatlas-steinau-2004-differential-display,
author = {Steinau, Martin and Unger, Elizabeth R and Vernon, Suzanne D and Jones, James F and Rajeevan, Mangalathu S},
title = {Differential-display PCR of peripheral blood for biomarker discovery in chronic fatigue syndrome.},
journal = {Journal of molecular medicine (Berlin, Germany)},
year = {2004},
doi = {10.1007/s00109-004-0586-4},
note = {PubMed: 15490094},
url = {https://www.mecfsatlas.com/evidence/steinau-2004-differential-display},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/steinau-2004-differential-display
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