Baraniuk, James N, Casado, Begona, Maibach, Hilda et al. · BMC neurology · 2005 · DOI
Researchers examined fluid from around the spine (cerebrospinal fluid) in people with ME/CFS and found specific proteins that were present in patients but absent in healthy people. Using advanced laboratory techniques, they identified a set of 5 key proteins that could correctly identify ME/CFS in 80% of cases. These findings suggest ME/CFS may involve immune system and brain inflammation, offering hope for an objective test in the future.
This study provides potential biological evidence for ME/CFS by identifying a specific protein signature in cerebrospinal fluid, suggesting objective diagnostic markers may exist. The findings support the hypothesis that ME/CFS involves central nervous system and immune dysfunction, which could guide future therapeutic development and help distinguish ME/CFS from other conditions with similar symptoms.
This pilot study does not prove these proteins cause ME/CFS or establish a definitive diagnostic test—further validation in larger, independent populations is required before clinical application. The study does not clarify whether these protein changes are primary drivers of illness or secondary consequences of disease. Pooling samples in cohort 1 limits individual-level inference and the small sample sizes reduce generalizability.
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
Baraniuk, James N, Casado, Begona, Maibach, Hilda, Clauw, Daniel J, Pannell, Lewis K, & Hess S, Sonja (2005). A Chronic Fatigue Syndrome - related proteome in human cerebrospinal fluid.. BMC neurology. https://doi.org/10.1186/1471-2377-5-22
BibTeX
@article{mecfsatlas-baraniuk-2005-chronic-fatigue,
author = {Baraniuk, James N and Casado, Begona and Maibach, Hilda and Clauw, Daniel J and Pannell, Lewis K and Hess S, Sonja},
title = {A Chronic Fatigue Syndrome - related proteome in human cerebrospinal fluid.},
journal = {BMC neurology},
year = {2005},
doi = {10.1186/1471-2377-5-22},
note = {PubMed: 16321154},
url = {https://www.mecfsatlas.com/evidence/baraniuk-2005-chronic-fatigue},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-28. https://www.mecfsatlas.com/evidence/baraniuk-2005-chronic-fatigue
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