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Iron deposition and atrophy in cerebral grey matter and their possible association with serum iron in relapsing-remitting multiple sclerosis

Published:September 19, 2020DOI:https://doi.org/10.1016/j.clinimag.2020.09.006

      Abstract

      Purpose

      The present study was carried out to investigate any possible linkage between cerebral grey matter volumetric, iron changes, white matter's lesions load and serum iron levels in a group of relapsing-remitting multiple sclerosis (RRMS) patients.

      Materials and methods

      Sixty-five RRMS patients along with thirty-four age-matched healthy controls (HCs) were recruited. Serum samples were isolated from blood samples which were collected in vacutainer plain tubes individually from both groups. Both groups were scanned at 1.5 T magnetic resonance imaging (MRI) using the following 3D sequences; T1-weighted gradient echo (MPRAGE), T2*-weighted gradient echo and T2-weighted fluid-attenuated inversion recovery (FLAIR).

      Results

      Significant differences were observed between the RRMS patients and HCs for cortical and deep grey matter (dGM) volumes where cortical and dGM volumes in RRMS patient were significantly smaller than those in HCs. While iron deposition in the cortex, putamen (PT) and globus pallidus (GP) of RRMS patients were significantly higher than those of HCs, iron levels in thalamus (TH) and serum were significantly lower in RRMS compared to those in HCs. Except for T2 lesion load, none of volumetric measures showed any association with patients' disability status. Cerebral grey matter's iron changes did not show any association with those of serum.

      Conclusion

      Smaller cortical and subcortical grey matter volumes in RRMS patients compared to HCs were detected. None of the volumetric measures showed any association with patients' disability status. RRMS patients showed increased iron levels in the PT, GP and cortex and decreased levels in the TH and serum.

      Keywords

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