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Article type: Research Article
Authors: Oikonomidi, Aikaterinia | Tautvydaitė, Domilėa | Gholamrezaee, Mehdi M.b | Henry, Huguesc | Bacher, Michaeld | Popp, Juliusa; *
Affiliations: [a] Department of Psychiatry, Division of Old Age Psychiatry, University Hospital of Lausanne, Switzerland | [b] Department of Psychiatry, University Hospital of Lausanne, Switzerland | [c] Department of Laboratories, University Hospital of Lausanne, Switzerland | [d] Institute of Immunology, Philipps-University Marburg, Germany
Correspondence: [*] Correspondence to: Julius Popp, Department of Psychiatry, Division of Old Age Psychiatry, University Hospital of Lausanne, Site de Cery, 1008 Prilly, Switzerland. Tel.: +41213145267; E-mail: [email protected].
Abstract: Background:Macrophage migration inhibitory factor (MIF) is a pro-inflammatory protein playing a regulatory role in the immune response. First evidence from in vitro and animal studies suggests that MIF may be involved in the development of Alzheimer’s disease (AD) pathology. Objective:To address in older subjects (i) the relationships between AD pathology and MIF plasma and cerebrospinal fluid (CSF) levels; and (ii) to investigate whether increased MIF-related systemic and CNS inflammation is associated with clinical disease progression. Methods:CSF and plasma concentrations of MIF as well as biomarkers of amyloid, neuronal injury, and tau hyperphosphorylation (CSF Aβ1–42, tau, and ptau, respectively) were assessed in 97 subjects with MCI or mild dementia (cognitive impairment, CI) and 52 healthy volunteers with normal cognition. Clinical and neuropsychological evaluations were performed at inclusion and at follow up visits. Results:CSF MIF levels were higher in participants with CI with an AD CSF biomarker profile, but not in CI with a non-AD profile, compared to the healthy controls. Higher MIF CSF levels were associated with higher CSF tau and ptau and lower CSF Aβ1–42 after adjusting for potential confounders. In CI, MIF CSF independently predicted cognitive decline at a follow-up visit after controlling for potential confounders including CSF Aβ1–42 and tau levels. Conclusion:Our study provides evidence that MIF-related inflammation is related to amyloid pathology, tau hyperphosphorylation, and neuronal injury at the early clinical stages of AD. Higher MIF CSF levels are associated with accelerated cognitive decline in MCI and mild dementia.
Keywords: Alzheimer’s disease, cerebrospinal fluid biomarkers, cognitive decline, macrophage migration inhibitory factor, neuroinflammation
DOI: 10.3233/JAD-170335
Journal: Journal of Alzheimer's Disease, vol. 60, no. 1, pp. 273-281, 2017
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