Ifuku, Masataka, Hossain, Shamim M, Noda, Mami et al. · The European journal of neuroscience · 2014 · DOI
This study used rats to understand how an immune trigger (a synthetic viral mimic) causes prolonged fatigue. Researchers found that when this trigger activates immune cells in the brain called microglia, they release a chemical messenger called IL-1β that affects how the brain handles serotonin, leading to reduced activity and fatigue-like behavior.
Understanding the specific brain mechanisms underlying immune-triggered fatigue could inform therapeutic strategies for ME/CFS patients. This work identifies microglial activation and IL-1β signaling as potential intervention targets and suggests why anti-inflammatory approaches may be relevant for immunologically driven fatigue conditions.
This rat model study does not prove that human ME/CFS follows the same poly-I:C→microglia→IL-1β→5-HTT pathway, nor does it establish causation in patients versus correlation in an induced acute-to-subacute model. The findings apply to immunologically provoked fatigue but may not explain ME/CFS cases with unclear immunological triggers.
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
Ifuku, Masataka, Hossain, Shamim M, Noda, Mami, & Katafuchi, Toshihiko (2014). Induction of interleukin-1β by activated microglia is a prerequisite for immunologically induced fatigue.. The European journal of neuroscience. https://doi.org/10.1111/ejn.12668
BibTeX
@article{mecfsatlas-ifuku-2014-induction-interleukin,
author = {Ifuku, Masataka and Hossain, Shamim M and Noda, Mami and Katafuchi, Toshihiko},
title = {Induction of interleukin-1β by activated microglia is a prerequisite for immunologically induced fatigue.},
journal = {The European journal of neuroscience},
year = {2014},
doi = {10.1111/ejn.12668},
note = {PubMed: 25040499},
url = {https://www.mecfsatlas.com/evidence/ifuku-2014-induction-interleukin},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-26. https://www.mecfsatlas.com/evidence/ifuku-2014-induction-interleukin
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