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Voxel‐based quantitative susceptibility mapping in Parkinson's disease with mild cognitive impairment
Author(s) -
Uchida Yuto,
Kan Hirohito,
Sakurai Keita,
Arai Nobuyuki,
Kato Daisuke,
Kawashima Shoji,
Ueki Yoshino,
Matsukawa Noriyuki
Publication year - 2019
Publication title -
movement disorders
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.352
H-Index - 198
eISSN - 1531-8257
pISSN - 0885-3185
DOI - 10.1002/mds.27717
Subject(s) - cuneus , precuneus , quantitative susceptibility mapping , lingual gyrus , montreal cognitive assessment , voxel based morphometry , voxel , cognition , parkinson's disease , psychology , medicine , audiology , magnetic resonance imaging , cognitive impairment , neuroscience , disease , radiology , white matter
Objective Brain iron accumulation has been proposed as one of the pathomechanisms in Parkinson's disease (PD). This study aimed to examine the whole‐brain pattern of iron accumulation associated with cognitive impairment in patients with PD using voxel‐based quantitative susceptibility mapping analysis. Methods We enrolled 24 patients with PD and mild cognitive impairment, 22 patients with PD and normal cognition, and 20 age‐matched healthy controls in this cross‐sectional study. All participants underwent global cognitive and physical assessments and brain MRI. Using a combined method of voxel‐based morphometry and quantitative susceptibility mapping, we compared the voxel‐wise magnetic susceptibility of the whole brain between the groups and analyzed its correlation with the cognitive and behavioral data. Results The PD and mild cognitive impairment group had lower Montreal Cognitive Assessment (MoCA) score than the PD and normal cognition and healthy control groups. There were no gray matter volumetric differences between the groups. In contrast, the voxel‐based quantitative susceptibility mapping analysis showed that the PD and mild cognitive impairment group had significantly higher quantitative susceptibility mapping values in the cuneus, precuneus, caudate head, fusiform gyrus, and orbitofrontal cortex than did the PD and normal cognition group. These quantitative susceptibility mapping values were negatively correlated with the MoCA scores in the PD patients (cuneus: r = −0.510, P < .001; caudate head: r = −0.458, P = 0.002). Conclusions This study suggests that cognitive impairment in PD is associated with cerebral iron burden and highlights the potential of quantitative susceptibility mapping as an auxiliary biomarker for early evaluation of cognitive decline in patients with PD. © 2019 International Parkinson and Movement Disorder Society