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The amyloid precursor family of proteins in excitatory neurons are essential for regulating cortico-hippocampal circuit dynamics in vivo

The amyloid precursor protein (APP) family is ubiquitously expressed in the mammalian brain and implicated in Alzheimer’s disease. APP family proteins participate in synaptic function and their absence impairs cognition. However, how these proteins regulate neural circuits and influence brain-behavi...

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Main Authors: Harris, Samuel S. (Author) , Rajani, Rikesh M. (Author) , Zünkler, Jana (Author) , Ellingford, Robert (Author) , Yang, Mengke (Author) , Rowland, James M. (Author) , Schmidt, Alexander (Author) , Lee, Byung Il (Author) , Kehring, Marten (Author) , Hellmuth, Mariam (Author) , Lam, Francesca Kar Wey (Author) , Fäßler, Dominique (Author) , Erdinger, Susanne (Author) , Wolfer, David P. (Author) , Sala Frigerio, Carlo (Author) , Wolf, Fred (Author) , Hyman, Bradley T. (Author) , Müller, Ulrike C. (Author) , Busche, Marc Aurel (Author)
Format: Article (Journal)
Language:English
Published: 24 June 2025
In: Cell reports
Year: 2025, Volume: 44, Issue: 6, Pages: 1-27
ISSN:2211-1247
DOI:10.1016/j.celrep.2025.115801
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.celrep.2025.115801
Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S2211124725005728
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Author Notes:Samuel S. Harris, Rikesh M. Rajani, Jana Zünkler, Robert Ellingford, Mengke Yang, James M. Rowland, Alexander Schmidt, Byung Il Lee, Marten Kehring, Mariam Hellmuth, Francesca Kar Wey Lam, Dominique Fässler, Susanne Erdinger, David P. Wolfer, Carlo Sala Frigerio, Fred Wolf, Bradley T. Hyman, Ulrike C. Müller, and Marc Aurel Busche
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Summary:The amyloid precursor protein (APP) family is ubiquitously expressed in the mammalian brain and implicated in Alzheimer’s disease. APP family proteins participate in synaptic function and their absence impairs cognition. However, how these proteins regulate neural circuits and influence brain-behavior relationships remains unknown. Using in vivo two-photon Ca2+-imaging and Neuropixels, we show that APP family knockout (KO) in excitatory neocortical and hippocampal neurons suppresses neuronal dynamics across behavioral states, and results in an increased proportion of low-activity and silent neurons. Further, APP family KO leads to a reduction in synapses expressing the requisite N-methyl-D-aspartate receptor (NMDAR) subunit GluN1, with pharmacological enhancement of NMDAR function normalizing aberrant dynamics in low-activity neurons and rectifying behavioral impairments. Suppressing NMDAR function in control mice replicates the functional phenotype observed in APP family KOs. Our findings indicate a physiological role for the APP family in regulating and sustaining spontaneous neuronal activity in cortico-hippocampal circuits in vivo.
Item Description:Online verfügbar: 11. Juni 2025, Artikelversion: 11. Juni 2025
Gesehen am 15.12.2025
Physical Description:Online Resource
ISSN:2211-1247
DOI:10.1016/j.celrep.2025.115801

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