Cited by 153Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

Therapeutic effects of glatiramer acetate and grafted CD115+monocytes in a mouse model of Alzheimer’s disease

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Koronyo, Yosef, Salumbides, Brenda C., Sheyn, Julia, Pelissier, Lindsey, Li, Songlin, Ljubimov, Vladimir, Moyseyev, Michelle, Daley, David +5 more·2015·Brain

Abstract

Weekly glatiramer acetate immunization of transgenic mice modelling Alzheimer's disease resulted in retained cognition (Morris water maze test), decreased amyloid-β plaque burden, and regulation of local inflammation through a mechanism involving enhanced recruitment of monocytes. Ablation of bone marrow-derived myeloid cells exacerbated plaque pathology, whereas weekly administration of glatiramer acetate enhanced cerebral recruitment of innate immune cells, which dampened the pathology. Here, we assessed the therapeutic potential of grafted CD115(+) monocytes, injected once monthly into the peripheral blood of transgenic APPSWE/PS1ΔE9 Alzheimer's disease mouse models, with and without weekly immunization of glatiramer acetate, as compared to glatiramer acetate alone. All immune-modulation treatment groups were compared with age-matched phosphate-buffered saline-injected control transgenic and untreated non-transgenic mouse groups. Two independent cohorts of mice were assessed for behavioural performance (6-8 mice/group); treatments started in 10-month-old symptomatic mice and spanned a total of 2 months. For all three treatments, our data suggest a substantial decrease in cognitive deficit as assessed by the Barnes maze test (P < 0.0001-0.001). Improved cognitive function was associated with synaptic preservation and reduction in cerebral amyloid-β protein levels and astrogliosis (P < 0.001 and P < 0.0001), with no apparent additive effects for the combined treatment. The peripherally grafted, green fluorescent protein-labelled and endogenous monocytes, homed to cerebral amyloid plaques and directly engulfed amyloid-β; their recruitment was further enhanced by glatiramer acetate. In glatiramer acetate-immunized mice and, moreover, in the combined treatment group, monocyte recruitment to the brain was coupled with greater elevation of the regulatory cytokine IL10 surrounding amyloid-β plaques. All treated transgenic mice had increased cerebral levels of MMP9 protein (P < 0.05), an enzyme capable of degrading amyloid-β, which was highly expressed by the infiltrating monocytes. In vitro studies using primary cultures of bone marrow monocyte-derived macrophages, demonstrated that glatiramer acetate enhanced the ability of macrophages to phagocytose preformed fibrillar amyloid-β1-42 (P < 0.0001). These glatiramer acetate-treated macrophages exhibited increased expression of the scavenger receptors CD36 and SCARA1 (encoded by MSR1), which can facilitate amyloid-β phagocytosis, and the amyloid-β-degrading enzyme MMP9 (P < 0.0001-0.001). Overall, our studies indicate that increased cerebral infiltration of monocytes, either by enrichment of their levels in the circulation or by weekly immunization with glatiramer acetate, resulted in substantial attenuation of disease progression in murine Alzheimer's models by mechanisms that involved enhanced cellular uptake and enzymatic degradation of toxic amyloid-β as well as regulation of brain inflammation.

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Authors
Koronyo, Y., Salumbides, B. C., Sheyn, J., Pelissier, L., Li, S., Ljubimov, V., Moyseyev, M., Daley, D., Fuchs, D.-T., Pham, M., Black, K. L., Rentsendorj, A., & Koronyo-Hamaoui, M.
Affiliations
Cedars-Sinai Medical Center (US)
Venue
Brain
Published
2015-06-06
Volume
138
Issue
8
Pages
2399-2422
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W2150318471
Cited by
153
References
71
Citations by year
2026: 9 · 2025: 8 · 2024: 16 · 2023: 20 · 2022: 9 · 2021: 25 · 2020: 24 · 2019: 9 · 2018: 7 · 2017: 11 · 2016: 11 · 2015: 4
FWCI
8.11
Type
journal article
Language
en
Open access
Locations
  • Brain (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Health Assistance Foundation
  • BrightFocus Foundation
  • Alzheimer's Research Trust
  • National Institutes of Health (UL1TR000124)
  • National Center for Advancing Translational Sciences (Grant UL1TR000124)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
glatiramer acetate, Alzheimer's disease, amyloid plaques, monocyte recruitment, immunotherapy, APPswe/PS1ΔE9 mice, bone marrow-derived myeloid cells, IL-10, MMP-9, macrophage phagocytosis, astrocyte activation, neuroinflammation
MeSH terms
Alzheimer Disease, Animals, Brain, Disease Models, Animal, Mice, Transgenic, Monocytes, Receptor, Macrophage Colony-Stimulating Factor, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Microglia, Plaque, Amyloid

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