Thakur, Vandana, Jamwal, Sumit, Kumar, Mandeep et al. · Neurotoxicity research · 2020 · DOI
Researchers studied a substance called hemin in mice to see if it could help with fatigue-like symptoms. Mice that were stressed for 21 days showed signs of exhaustion, weakness, and anxiety. When treated with hemin, these mice improved—they became more active, stronger, and less anxious. The improvements seemed to work through a specific pathway in the body related to an enzyme called HO-1.
This study identifies a potential molecular mechanism (HO-1 pathway activation) linking oxidative stress, mitochondrial dysfunction, and neurotransmitter dysregulation in CFS-like states. Understanding these interconnected pathways could inform development of targeted therapeutic interventions and help explain why ME/CFS patients experience fatigue and neurological symptoms simultaneously.
This study does not prove hemin is safe or effective in humans with ME/CFS—it only demonstrates effects in genetically identical mice under controlled laboratory stress. The forced swimming model creates acute stress-induced fatigue, which may not fully replicate the complex, multi-system pathophysiology of naturally occurring ME/CFS. Results also cannot definitively establish causation between HO-1 activation and symptom improvement versus correlation.
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
Thakur, Vandana, Jamwal, Sumit, Kumar, Mandeep, Rahi, Vikrant, & Kumar, Puneet (2020). Protective Effect of Hemin Against Experimental Chronic Fatigue Syndrome in Mice: Possible Role of Neurotransmitters.. Neurotoxicity research. https://doi.org/10.1007/s12640-020-00231-y
BibTeX
@article{mecfsatlas-thakur-2020-protective-effect,
author = {Thakur, Vandana and Jamwal, Sumit and Kumar, Mandeep and Rahi, Vikrant and Kumar, Puneet},
title = {Protective Effect of Hemin Against Experimental Chronic Fatigue Syndrome in Mice: Possible Role of Neurotransmitters.},
journal = {Neurotoxicity research},
year = {2020},
doi = {10.1007/s12640-020-00231-y},
note = {PubMed: 32506340},
url = {https://www.mecfsatlas.com/evidence/thakur-2020-protective-effect},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/thakur-2020-protective-effect
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