Xiang, X.* ; Werner, G.* ; Bohrmann, B.* ; Liesz, A.* ; Mazaheri, F.* ; Capell, A.* ; Feederle, R. ; Knuesel, I.* ; Kleinberger, G.* ; Haass, C.*
TREM2 deficiency reduces the efficacy of immunotherapeutic amyloid clearance.
EMBO Mol. Med. 8, 992-1004 (2016)
Immunotherapeutic approaches are currently the most advanced treatments for Alzheimer's disease (AD). Antibodies against amyloid β-peptide (Aβ) bind to amyloid plaques and induce their clearance by microglia via Fc receptor-mediated phagocytosis. Dysfunctions of microglia may play a pivotal role in AD pathogenesis and could result in reduced efficacy of antibody-mediated Aβ clearance. Recently, heterozygous mutations in the triggering receptor expressed on myeloid cells 2 (TREM2), a microglial gene involved in phagocytosis, were genetically linked to late onset AD Loss of TREM2 reduces the ability of microglia to engulf Aβ. We have now investigated whether loss of TREM2 affects the efficacy of immunotherapeutic approaches. We show that anti-Aβ antibodies stimulate Aβ uptake and amyloid plaque clearance in a dose-dependent manner in the presence or absence of TREM2. However, TREM2-deficient N9 microglial cell lines, macrophages as well as primary microglia showed significantly reduced uptake of antibody-bound Aβ and as a consequence reduced clearance of amyloid plaques. Titration experiments revealed that reduced efficacy of amyloid plaque clearance by Trem2 knockout cells can be compensated by elevating the concentration of therapeutic antibodies.
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Publication type
Article: Journal article
Document type
Scientific Article
Thesis type
Editors
Keywords
Alzheimer's Disease ; Trem2 ; Immunotherapy ; Neurodegeneration ; Phagocytosis; Alzheimers-disease; Microglial Response; In-vivo; Beta; Bace1; Phagocytosis; Pathology; Macrophages; System; Model
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Language
german
Publication Year
2016
Prepublished in Year
HGF-reported in Year
2016
ISSN (print) / ISBN
1757-4676
e-ISSN
1757-4684
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Volume: 8,
Issue: 9,
Pages: 992-1004
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Wiley
Publishing Place
Chichester
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Reviewing status
Peer reviewed
POF-Topic(s)
90000 - German Center for Diabetes Research
30201 - Metabolic Health
Research field(s)
Helmholtz Diabetes Center
PSP Element(s)
G-502291-001
G-502210-001
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Erfassungsdatum
2016-07-21