Abstract
Purpose
The glymphatic system is a fluid exchange pathway that clears waste products that is crucial for the maintenance of brain homeostasis. However, the exact role it plays in the emergence of fibromyalgia (FM) is still not fully understood. Here, we explored the changes in non-invasive MRI proxy probably related to the glymphatic function in FM patients, and explored brain-behavior relationships.
Methods
A total of 40 participants, consisting of 20 individuals with FM and 20 healthy controls (HCs), were included in the study. The participants underwent structural T1-weighted MRI, diffusion tensor imaging (DTI), and clinical assessment. The data was obtained from an open access dataset. The study compared non-invasive MRI indices, including choroid plexus (CP) volume and DTI analysis along the perivascular space (ALPS), between the FM and HC groups. Furthermore, correlation analysis was conducted to determine the correlation between clinical parameters and both CP volume and DTI-ALPS index.
Results
Patients with FM had significantly higher CP volume and a lower DTI-ALPS index than HCs adjusting for age and intracranial volume. Higher CP volume was associated with lower DTI-ALPS index, and longer disease duration.
Conclusion
Our findings demonstrate aberrant glymphatic function in FM, and that dysfunction in the brain glymphatic system may play a role in the neural mechanisms underlying FM.
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Data availability
Data are available from a public dataset via OpenNeuro with accession number ds001928 (https://openneuro.org/datasets/ds001928/versions/1.1.0).
Code availability
None.
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Acknowledgements
We thank all the participants in this study, and Giuseppe Barisano’s code for DTI-ALPS (https://github.com/gbarisano/alps).
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This research was approved by the Ethics Committee of the Bioethics Committee of the Institute of Neurobiology, UNAM Juriquilla, Queretaro, Mexico.
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Tu, Y., Li, Z., Xiong, F. et al. Decreased DTI-ALPS and choroid plexus enlargement in fibromyalgia: a preliminary multimodal MRI study. Neuroradiology 65, 1749–1755 (2023). https://doi.org/10.1007/s00234-023-03240-8
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DOI: https://doi.org/10.1007/s00234-023-03240-8