The role of mitochondrial dysfunctions due to oxidative and nitrosative stress in the chronic pain or chronic fatigue syndromes and fibromyalgia patients: peripheral and central mechanisms as therapeutic targets? — CFSMEATLAS
The role of mitochondrial dysfunctions due to oxidative and nitrosative stress in the chronic pain or chronic fatigue syndromes and fibromyalgia patients: peripheral and central mechanisms as therapeutic targets?
Meeus, Mira, Nijs, Jo, Hermans, Linda et al. · Expert opinion on therapeutic targets · 2013 · DOI
Quick Summary
This study explores how damage to the energy-producing parts of cells (mitochondria) might explain why ME/CFS and fibromyalgia patients experience persistent pain and fatigue. When the body experiences oxidative stress, it produces harmful molecules that can damage mitochondria and reduce the energy (ATP) available to muscles and the brain. The researchers suggest that boosting antioxidants and repairing mitochondria could be promising treatments worth testing.
Why It Matters
This study provides a mechanistic framework linking a measurable biological process (mitochondrial dysfunction) to the core symptoms of ME/CFS, which could guide development of targeted treatments. Understanding whether mitochondrial impairment is causal rather than secondary could shift clinical approaches from symptom management toward addressing underlying pathophysiology.
Observed Findings
Mitochondrial dysfunction demonstrated in leukocytes of CFS patients
Mitochondrial dysfunction demonstrated in muscle cells of FM patients
Elevated reactive oxygen species (ROS) in CFS and FM
Impaired ATP production in affected cells
Evidence linking mitochondrial dysfunction to central sensitization and generalized pain hypersensitivity
Inferred Conclusions
Oxidative and nitrosative stress reduce mitochondrial ATP production in both peripheral muscle and central neural tissue
Lowered ATP availability in neural cells contributes to central sensitization and chronic widespread pain
Antioxidant therapy and mitochondrial biogenesis enhancement may represent viable therapeutic targets
Exercise therapy warrants investigation as a potential mitochondrial-restorative intervention
Remaining Questions
Does mitochondrial dysfunction occur in central neural cells of ME/CFS patients, and does this directly cause central sensitization?
Are the observed mitochondrial abnormalities a primary cause or secondary consequence of ME/CFS?
What This Study Does Not Prove
This review does not establish causation—it presents correlational evidence that oxidative stress and mitochondrial dysfunction co-occur with ME/CFS symptoms. The study does not provide direct evidence that these mechanisms cause pain and fatigue in humans, nor does it demonstrate that the proposed interventions (antioxidants, mitochondrial biogenesis targeting) are effective in patients. It remains unclear whether mitochondrial dysfunction is a primary driver or a secondary consequence of the disease.
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 →