Microglial dysfunction is a key pathological feature of Alzheimer´s disease (AD), but little is known about proteome-wide changes in microglia during the course of AD pathogenesis and their consequences for microglial function. Here, we performed an in-depth proteomic characterization of microglia in two AD mouse models, the overexpression APPPS1 and the knock-in AppNL-G-F (APP-KI) model. Proteome changes were followed from pre-deposition to early, middle and advanced stages of amyloid plaque pathology, revealing a large panel of Microglial Amyloid Response Proteins (MARPs) that reflect a heterogeneity of microglial alterations triggered by Adeposition. We demonstrate that the occurrence of MARPs coincided with the deposition of fibrillar A, recruitment of microglia to amyloid plaques and phagocytic dysfunction. While the proteomic and functional microglial changes were already markedly seen in 3 months old APPPS1 mice, they were delayed in the APP-KI model that generates substantially less fibrillar A. The identified microglial proteomic fingerprints of AD provide a valuable resource for functional studies of novel molecular targets and potential biomarkers for monitoring AD progression or therapeutic efficacy.
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Created: 8th Jul 2024 at 09:30
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Version 1 (earliest) Created 8th Jul 2024 at 09:30 by Rainer Malik
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Projects: SyNergy - published datasets
Institutions: DZNE
Projects: SyNergy - published datasets
Institutions: DZNE
Projects: SyNergy - published datasets
Institutions: DZNE
Projects: SyNergy - published datasets
Institutions: Klinikum der Universität München
Projects: SyNergy - published datasets
Institutions: Klinikum der Universität München
Public web page: Not specified
Organisms: Mus musculus, Rattus norvegicus, Homo sapiens, Macaca mulatta, Sus scrofa
Submitter: Rainer Malik
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Assays: Affinity purification coupled with mass spectrometry proteomics, Affinity purification coupled with mass spectrometry proteomics, Affinity purification coupled with mass spectrometry proteomics, Affinity purification coupled with mass spectrometry proteomics, Affinity purification coupled with mass spectrometry proteomics, Affinity purification coupled with mass spectrometry proteomics, Affinity purification coupled with mass spectrometry proteomics, Bottom-up proteomics, Gel-based experiment, Proteomics analysis of brain endothelial cells, Proteomics of Inflammasome, SWATH MS, Shotgun Proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics, Shotgun proteomics
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Microglial dysfunction is a key pathological feature of Alzheimer´s disease (AD), but little is known about proteome-wide changes in microglia during the course of AD pathogenesis and their consequences for microglial function. Here, we performed an in-depth proteomic characterization of microglia in two AD mouse models, the overexpression APPPS1 and the knock-in AppNL-G-F (APP-KI) model. Proteome changes were followed from pre-deposition to early, middle and advanced stages of amyloid plaque ...
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Primary microglia were isolated from mouse brains (cerebrum) using MACS Technology (Miltenyi Biotec) according to manufacturer´s instructions and as previously described (Daria et al., 2017). Briefly, brain cerebrum was dissected, freed from meninges and dissociated by enzymatic digestion using a Neural Tissue Dissociation Kit P (Miltenyi Biotec) and subsequent mechanical dissociation using 3 fire-polished glass Pasteur pipettes of decreasing diameter. CD11b positive microglia were magnetically ...
Submitter: Rainer Malik
Assay type: Experimental Assay Type
Technology type: Technology Type
Investigation: Proteomics
Organisms: Mus musculus
SOPs: No SOPs
Data files: Microglial proteomic signatures in APPPS1 and A...
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Abstract (Expand)
Authors: L. Sebastian Monasor, S. A. Muller, A. V. Colombo, G. Tanrioever, J. Konig, S. Roth, A. Liesz, A. Berghofer, A. Piechotta, M. Prestel, T. Saito, T. C. Saido, J. Herms, M. Willem, C. Haass, S. F. Lichtenthaler, S. Tahirovic
Date Published: 8th Jun 2020
Publication Type: Journal
PubMed ID: 32510331
Citation: Elife. 2020 Jun 8;9:e54083. doi: 10.7554/eLife.54083.