Lessons From Heat Stroke for Understanding Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.
Stanculescu, Dominic, Sepúlveda, Nuno, Lim, Chin Leong et al. · Frontiers in neurology · 2021 · DOI
Quick Summary
This study compares how the body breaks down during heat stroke with what happens in ME/CFS. Both conditions involve similar problems: inflammation, damage to the gut lining that allows harmful substances into the bloodstream, blood clotting issues, and problems with how cells produce energy. By understanding heat stroke better, researchers hope to find new ways to treat ME/CFS.
Why It Matters
This study bridges two different disease fields to identify common biological pathways in ME/CFS. Understanding these shared mechanisms could accelerate drug discovery by allowing researchers to repurpose heat stroke therapeutics for ME/CFS and help explain why the condition persists once initiated.
Observed Findings
Both heat stroke and ME/CFS involve inflammatory pathway activation and homeostatic imbalance
Splanchnic vasoconstriction, gut permeability increases, and endotoxemia have been documented in both conditions
Mitochondrial dysfunction and blood coagulation disorders appear in both heat stroke and ME/CFS
Preliminary transcriptomic studies suggest similar patterns of altered gene expression in heat stroke and ME/CFS
Predisposing factors such as pre-existing inflammation or infection overlap between the two conditions
Inferred Conclusions
Intestinal barrier dysfunction and subsequent endotoxemia may represent a self-perpetuating central mechanism in ME/CFS pathophysiology
Heat stroke models and therapeutics could provide valuable insights for understanding and treating ME/CFS
Common pathways in physiological responses to different stressors may underlie both conditions despite their different etiologies
Further direct investigation of these proposed overlaps in ME/CFS patients is warranted to validate mechanistic similarities
Remaining Questions
Do the proposed intestinal barrier dysfunction mechanisms occur early in ME/CFS development or represent a secondary consequence of other primary pathology?
What This Study Does Not Prove
This is a literature review and does not provide new experimental data directly proving these mechanisms occur in ME/CFS patients. The similarities identified are correlational and suggestive rather than causal. The fact that heat stroke and ME/CFS share some mechanisms does not mean they have the same underlying cause, given their very different triggering events (acute heat exposure vs. unclear triggers).
Which specific heat stroke therapeutics would be most relevant to test in ME/CFS, and would they address the chronic vs. acute nature differences?
What causes the shift from acute heat stress response (heat stroke) to chronic homeostatic imbalance (ME/CFS) in genetically or immunologically susceptible individuals?
Can transcriptomic and mechanistic findings be validated through prospective studies directly comparing heat stroke patients with ME/CFS patients?