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001     271973
005     20250127091546.0
024 7 _ |a pmc:PMC11375924
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024 7 _ |a 10.1186/s13024-024-00752-6
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024 7 _ |a pmid:39238030
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024 7 _ |a altmetric:167060275
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037 _ _ |a DZNE-2024-01115
041 _ _ |a English
082 _ _ |a 570
100 1 _ |a Zatcepin, Artem
|0 P:(DE-2719)9001654
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245 _ _ |a Regional desynchronization of microglial activity is associated with cognitive decline in Alzheimer's disease.
260 _ _ |a London
|c 2024
|b Biomed Central
336 7 _ |a article
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336 7 _ |a ARTICLE
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336 7 _ |a Journal Article
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520 _ _ |a Microglial activation is one hallmark of Alzheimer disease (AD) neuropathology but the impact of the regional interplay of microglia cells in the brain is poorly understood. We hypothesized that microglial activation is regionally synchronized in the healthy brain but experiences regional desynchronization with ongoing neurodegenerative disease. We addressed the existence of a microglia connectome and investigated microglial desynchronization as an AD biomarker.To validate the concept, we performed microglia depletion in mice to test whether interregional correlation coefficients (ICCs) of 18 kDa translocator protein (TSPO)-PET change when microglia are cleared. Next, we evaluated the influence of dysfunctional microglia and AD pathophysiology on TSPO-PET ICCs in the mouse brain, followed by translation to a human AD-continuum dataset. We correlated a personalized microglia desynchronization index with cognitive performance. Finally, we performed single-cell radiotracing (scRadiotracing) in mice to ensure the microglial source of the measured desynchronization.Microglia-depleted mice showed a strong ICC reduction in all brain compartments, indicating microglia-specific desynchronization. AD mouse models demonstrated significant reductions of microglial synchronicity, associated with increasing variability of cellular radiotracer uptake in pathologically altered brain regions. Humans within the AD-continuum indicated a stage-depended reduction of microglia synchronicity associated with cognitive decline. scRadiotracing in mice showed that the increased TSPO signal was attributed to microglia.Using TSPO-PET imaging of mice with depleted microglia and scRadiotracing in an amyloid model, we provide first evidence that a microglia connectome can be assessed in the mouse brain. Microglia synchronicity is closely associated with cognitive decline in AD and could serve as an independent personalized biomarker for disease progression.
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650 _ 7 |a Alzheimer’s disease
|2 Other
650 _ 7 |a Brain connectivity
|2 Other
650 _ 7 |a Dementia
|2 Other
650 _ 7 |a Microglia
|2 Other
650 _ 7 |a Microglia desynchronization
|2 Other
650 _ 7 |a Microglia synchronicity
|2 Other
650 _ 7 |a Neuroinflammation
|2 Other
650 _ 7 |a PET
|2 Other
650 _ 7 |a TSPO
|2 Other
650 _ 7 |a Receptors, GABA
|2 NLM Chemicals
650 _ 2 |a Animals
|2 MeSH
650 _ 2 |a Microglia: metabolism
|2 MeSH
650 _ 2 |a Alzheimer Disease: metabolism
|2 MeSH
650 _ 2 |a Alzheimer Disease: pathology
|2 MeSH
650 _ 2 |a Mice
|2 MeSH
650 _ 2 |a Cognitive Dysfunction: metabolism
|2 MeSH
650 _ 2 |a Humans
|2 MeSH
650 _ 2 |a Brain: metabolism
|2 MeSH
650 _ 2 |a Brain: pathology
|2 MeSH
650 _ 2 |a Disease Models, Animal
|2 MeSH
650 _ 2 |a Positron-Emission Tomography
|2 MeSH
650 _ 2 |a Receptors, GABA: metabolism
|2 MeSH
650 _ 2 |a Male
|2 MeSH
650 _ 2 |a Mice, Transgenic
|2 MeSH
650 _ 2 |a Connectome: methods
|2 MeSH
650 _ 2 |a Female
|2 MeSH
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700 1 _ |a Brösamle, Desirée
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700 1 _ |a Wendeln, Ann-Christin
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700 1 _ |a Heindl, Steffanie
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700 1 _ |a Liesz, Arthur
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700 1 _ |a Stoecklein, Sophia
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700 1 _ |a Biechele, Gloria
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700 1 _ |a Eckenweber, Florian
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700 1 _ |a Herms, Jochen
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700 1 _ |a Buerger, Katharina
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700 1 _ |a Simons, Mikael
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700 1 _ |a Rupprecht, Rainer
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700 1 _ |a Riemenschneider, Markus J
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700 1 _ |a Albert, Nathalie L
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700 1 _ |a Beyer, Marc
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700 1 _ |a Neher, Jonas J
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700 1 _ |a Paeger, Lars
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700 1 _ |a Levin, Johannes
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700 1 _ |a Höglinger, Günter U
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700 1 _ |a Perneczky, Robert
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700 1 _ |a Ziegler, Sibylle I
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700 1 _ |a Brendel, Matthias
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773 _ _ |a 10.1186/s13024-024-00752-6
|g Vol. 19, no. 1, p. 64
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|t Molecular neurodegeneration
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|y 2024
|x 1750-1326
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