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• W1986302550 abstract "Cognitive impairment is one of the most frequent symptoms in patients with multiple sclerosis (MS) but its underlying mechanisms are poorly understood. A number of pathogenetic correlates have previously been proposed including psychosocial factors (such as depression and fatigue), inflammation, neurodegeneration, and neuroendocrine dysregulation. However, these different systems have never been studied in parallel and their differential contributions to cognitive impairment in MS are unknown. We studied a well-characterized cohort of cognitively impaired (CI, n=25) and cognitively preserved (CP, n=25) MS patients based on a comprehensive neuropsychological testing battery, a test of hypothalamo-pituitary-adrenal axis functioning (dexamethasone-corticotropin-releasing hormone suppression test, Dex-CRH test) as well as peripheral blood and MRI markers of inflammatory activity. CI patients had significantly higher disability. In addition, CI patients showed higher levels of fatigue and depression. Fatigue was more closely associated with measures of attention while depression showed strongest correlations with memory tests. Furthermore, percentage of IFNγ-positive CD4+ and CD8+ T cells showed modest correlations with processing speed and working memory. MRI markers of inflammation or global atrophy were not associated with neuropsychological function. Compared to previous studies, the number of patients exhibiting HPA axis hyperactivity was very low and no correlations were found with neuropsychological function. We conclude that fatigue and depression are the main correlates of cognitive impairment, which show domain-specific associations with measures of attention and memory." @default.
• W1986302550 created "2016-06-24" @default.
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• W1986302550 date "2010-10-01" @default.
• W1986302550 modified "2023-10-16" @default.
• W1986302550 title "Correlates of cognitive dysfunction in multiple sclerosis" @default.
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• W1986302550 doi "https://doi.org/10.1016/j.bbi.2010.05.006" @default.
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