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Glia. 2021 Aug;69(8):1852-1881. doi: 10.1002/glia.23981. Epub 2021 Feb 25.

Reactive astrocytes as treatment targets in Alzheimer's disease-Systematic review of studies using the APPswePS1dE9 mouse model.

Glia

Tamar Smit, Natasja A C Deshayes, David R Borchelt, Willem Kamphuis, Jinte Middeldorp, Elly M Hol

Affiliations

  1. Department of Translational Neuroscience, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands.
  2. Swammerdam Institute for Life Sciences, Center for Neuroscience, University of Amsterdam, Amsterdam, The Netherlands.
  3. Center for Translational Research in Neurodegenerative Disease, McKnight Brain Institute, Department of Neuroscience, University of Florida College of Medicine, Gainesville, Florida, USA.
  4. Netherlands Institute for Neuroscience, An Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, The Netherlands.
  5. Department of Immunobiology, Biomedical Primate Research Centre, Rijswijk, The Netherlands.

PMID: 33634529 PMCID: PMC8247905 DOI: 10.1002/glia.23981

Abstract

Astrocytes regulate synaptic communication and are essential for proper brain functioning. In Alzheimer's disease (AD) astrocytes become reactive, which is characterized by an increased expression of intermediate filament proteins and cellular hypertrophy. Reactive astrocytes are found in close association with amyloid-beta (Aβ) deposits. Synaptic communication and neuronal network function could be directly modulated by reactive astrocytes, potentially contributing to cognitive decline in AD. In this review, we focus on reactive astrocytes as treatment targets in AD in the APPswePS1dE9 AD mouse model, a widely used model to study amyloidosis and gliosis. We first give an overview of the model; that is, how it was generated, which cells express the transgenes, and the effect of its genetic background on Aβ pathology. Subsequently, to determine whether modifying reactive astrocytes in AD could influence pathogenesis and cognition, we review studies using this mouse model in which interventions were directly targeted at reactive astrocytes or had an indirect effect on reactive astrocytes. Overall, studies specifically targeting astrocytes to reduce astrogliosis showed beneficial effects on cognition, which indicates that targeting astrocytes should be included in developing novel therapies for AD.

© 2021 The Authors. GLIA published by Wiley Periodicals LLC.

Keywords: AD mouse model; APPswePS1dE9; Alzheimer's disease; amyloid-beta; reactive astrocytes

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