Abstract
Purpose
Cognitive impairment has been revealed in primary Sjögren’s syndrome (pSS). However, the underlying white matter structural connectivity (SC) changes have not been studied. This study aimed to investigate the altered white matter brain network in patients with pSS using diffusion tensor imaging (DTI).
Methods
Forty-one pSS patients and sixty matched healthy controls (HCs) underwent neuropsychological tests and the subsequent MRI examinations. The clinical data were gathered from the medical record. The structural brain network was established using DTI, and a link-based comparison was performed between patients with pSS and HCs (false discovery rate correction, P < 0.05). Furthermore, the mean fractional anisotropy (FA) of the altered SCs was correlated with the neuropsychological tests and clinical data in patients with pSS (Bonferroni correction, P < 0.05).
Results
Compared with HCs, patients with pSS mainly exhibited decreased SC in the frontal and parietal lobes and some parts of the temporal and occipital lobes. In addition, increased SC was found between the right caudate nucleus and right median cingulate/paracingulate gyri. Specifically, the reduced SC between the left middle temporal gyrus and left middle occipital gyrus was negatively correlated with white matter high signal intensity (WMH).
Conclusions
Patients with pSS showed diffusely decreased SC mainly in the frontoparietal network and exhibited a negative correlation between the reduced SC and WMH. SC represents a potential biomarker for preclinical brain impairment in patients with pSS.
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Abbreviations
- MRI:
-
Magnetic resonance imaging
- pSS:
-
Primary Sjögren’s syndrome
- DTI:
-
Diffusion tensor imaging
- SC:
-
Structural connectivity
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Funding
This study was supported by the National Natural Science Foundation of China (No: 81701679 to X. D. Zhang and No: 62176181 to J. H. Xu), Natural Science Foundation of Tianjin (19JCQNJC09800 to X. D. Zhang), and Tianjin Key Medical Discipline (Specialty) Construction Project.
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Zhang, XD., Li, JL., Zhou, JM. et al. Altered white matter structural connectivity in primary Sjögren’s syndrome: a link-based analysis. Neuroradiology 64, 2011–2019 (2022). https://doi.org/10.1007/s00234-022-02970-5
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DOI: https://doi.org/10.1007/s00234-022-02970-5