Abstract
Objective
This study investigated differences in subcortical brain volumes of SLE patients with cognitive deficits (SLE-CD) and SLE patients with normal cognitive performance (SLE-CN), regardless of the presence of other neuropsychiatric symptoms.
Method
We studied 40 patients divided into two-matched groups (SLE-CD n = 20; SLE-CN n = 20), with age ranging from 21 to 63 years old (100 % female) and 14.73 ± 10.18 years of diagnosis. Magnetic resonance imaging exams were performed on a 1.5 T scanner. A neuropsychological flexible battery was applied individually, including reasoning/problem-solving, praxis, episodic and working memory, processing speed, language/fluency, executive functions (inhibition and flexibility), and sustained attention. Z score ≤ − 2.0 in any dimension was considered as a cut-off for being considered to possess cognitive deficits. One-way analyses of covariance (ANCOVA) were performed to compare the brain structure volumes between groups. The analyses were controlled for the effects of lupus-related neuropsychiatric disorders.
Results
SLE patients with cognitive deficits had significantly smaller volumes in the left hippocampus, amygdala, and the right hippocampus than SLE patients without cognitive deficits.
Conclusion
SLE patients with cognitive deficits appeared to have reduced temporal lobe structures when compared with SLE without cognitive deficits. These results corroborate a systems vulnerability model that investigated temporal lobe vulnerability during normal aging and in other neurological disorders.
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Acknowledgments
We thank Denise Vieira Greca and Bernardo Bizzo for their work on data collection.
Funding
This work was supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brazil) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brazil).
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The authors declare no conflicts of interest.
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Zimmermann, N., Corrêa, D., Kubo, T. et al. Global Cognitive Impairment in Systemic Lupus Erythematosus Patients: A Structural MRI Study. Clin Neuroradiol 27, 23–29 (2017). https://doi.org/10.1007/s00062-015-0397-8
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DOI: https://doi.org/10.1007/s00062-015-0397-8