Schieffer et al. (2026)
- Authors: Elisabeth Schieffer, MIRACLE Study Group
- Institutes: Department of Cardiology, Angiology and Internal Intensive Care Medicine, University Hospital Marburg (UKGM), Germany, Department of Anesthesiology, University Hospital Regensburg (UKR), Germany
- Publisher: International ME/CFS Conference 2026
- Link: DOI
Summary
This research provides evidence of specific metabolic and mitochondrial “fingerprints” in ME/CFS, supporting the theory of systemic energy production failure. By identifying reduced mtDNA levels and altered HDL function, the study points toward potential diagnostic biomarkers and therapeutic targets focused on restoring mitochondrial density. Importantly, the inclusion of severely ill, bedridden patients ensures that these findings are representative of the full disease spectrum rather than just milder cases.
What was researched?
This study examined mitochondrial health and lipid metabolism in ME/CFS patients by measuring mitochondrial DNA (mtDNA) copy numbers and the functional properties of High-Density Lipoprotein (HDL).
Why was it researched?
The research aimed to uncover the mysterious pathomechanisms of ME/CFS by investigating immunological, inflammatory, and metabolic processes that might lead to the disease’s profound exhaustion.
How was it researched?
As part of the multi-center MIRACLE study, researchers analyzed blood samples from 200 ME/CFS patients—including bedridden individuals—and 200 healthy controls. The team performed proteomic analysis of HDL and stimulated cultured endothelial cells to assess the inflammatory potential of patient-derived samples.
What has been found?
ME/CFS patients showed significantly lower mtDNA copy numbers, which serves as a proxy for reduced mitochondrial density and energy-producing capacity. Additionally, the study identified a partially reduced inflammatory potential in the HDL of patients, suggesting a disruption in normal metabolic and vascular signaling.
Discussion
A major strength of this research is the recruitment of severely affected patients via home visits, addressing a common gap in ME/CFS literature. The findings suggest that mitochondrial depletion and lipidome alterations are core components of the disease’s metabolic stress profile.
Conclusion & Future Work
The results highlight reduced mtDNA and dysfunctional HDL as promising biomarkers for ME/CFS diagnostics. Future work within the MIRACLE project will use artificial intelligence to further refine these metabolic clusters.