Recent advances: Impaired Brain Waste Clearance in ME/CFS. What does it mean for Fibromyalgia?

A recent study has identified impairment in the brain’s natural waste-clearing system, the glymphatic system, among individuals with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). Researchers at Griffith University’s National Centre for Neuroimmunology and Emerging Diseases utilized advanced magnetic resonance imaging (MRI) to demonstrate, for the first time, reduced glymphatic function in ME/CFS patients. This impairment correlated with brain fog and diminished sleep quality (Thapaliya et al., 2026).

The glymphatic system serves as the brain’s primary mechanism for clearing metabolic waste and toxins, primarily during deep sleep, via specialized channels surrounding blood vessels. Inefficient glymphatic function can result in the accumulation of waste products, which may contribute to neuroinflammation and cognitive symptoms.

Lead author Dr. Kiran Thapaliya stated that the study provides “a mechanistic explanation for the inflammatory changes reported by other Australian and international teams” and suggested that “dysfunction in the brain’s natural cleaning system may be a key driver of this condition” (Griffith University, 2026). Professor Sonya Marshall-Gradisnik, Director of the National Centre for Neuroimmunology and Emerging Diseases, emphasized that poorer sleep was associated with reduced brain waste clearance, underscoring the essential role of sleep in maintaining brain health. The research team anticipates that these findings will facilitate the development of improved non-invasive diagnostic procedures and future treatments.

Implications for Fibromyalgia

This research is particularly relevant to the fibromyalgia community, as similar findings have been documented in fibromyalgia. A 2023 study published in Neuroradiology employed the same MRI technique (diffusion tensor imaging along the perivascular space, or DTI-ALPS) and found that individuals with fibromyalgia exhibited significantly reduced glymphatic function and increased choroid plexus volume compared to healthy controls. These alterations were associated with longer disease duration. The authors concluded that glymphatic dysfunction may contribute to the neural mechanisms underlying fibromyalgia (Tu et al., 2023).

Earlier, in 2018, researchers proposed in Medical Hypotheses that fibromyalgia could be conceptualized as a “glymphatic overload syndrome,” wherein impaired brain waste clearance contributes to the condition (Wostyn et al., 2018).

These parallel findings, specifically impaired glymphatic clearance observed in both ME/CFS and fibromyalgia, suggest potential shared biological pathways involving sleep disturbance, neuroinflammation, and brain waste management. They reinforce existing knowledge regarding the significance of sleep disruption in both conditions and contribute to the expanding research on central sensitization and neuroimmune mechanisms in nociplastic pain disorders such as fibromyalgia.

Significance of These Insights

Mechanistic studies such as these advance understanding beyond symptomatic descriptions by providing clearer explanations for the origins of symptoms. They offer promising avenues for further investigation, including sleep-focused interventions to support glymphatic clearance, the development of non-invasive imaging biomarkers, and the identification of novel therapeutic targets addressing underlying brain physiology.

Although further research is necessary, these studies equip patients, clinicians, and advocates with precise scientific terminology to describe the biological bases of these conditions.

References:

Griffith University. (2026, July 2). Brain’s waste-clearing ability impaired in ME/CFS patients. https://www.eurekalert.org/news-releases/1134732
Thapaliya, K., Marshall-Gradisnik, S., Inderyas, M., & Barnden, L. (2026). Disrupted glymphatic function and its relationship with sleep and cognitive impairment in ME/CFS assessed via DTI-ALPS. Frontiers in Neuroscience, 20, Article 1875420. https://doi.org/10.3389/fnins.2026.1875420
Tu, Y., Li, Z., Xiong, F., & Gao, F. (2023). Decreased DTI-ALPS and choroid plexus enlargement in fibromyalgia: A preliminary multimodal MRI study. Neuroradiology, 65(12), 1749–1755. https://doi.org/10.1007/s00234-023-03240-8
Wostyn, P., Van Dam, D., Audenaert, K., & De Deyn, P. P. (2018). Fibromyalgia as a glymphatic overload syndrome. Medical Hypotheses, 115, 17–18. https://doi.org/10.1016/j.mehy.2018.03.014