ArticleJournal of Alzheimer's disease reports2021
Is There Any Evidence of Monocytes Involvement in Alzheimer's Disease? A Pilot Study on Human Postmortem Brain.
Article in Journal of Alzheimer's disease reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 14 citations in OpenAlex.
- Article
- Bornyl Acetate and Menthol Provide Neuroprotection Against Lipopolysaccharide-Induced Alzheimer's Disease-Like Condition in C57BL/6 Mice by Downregulating NARC-1 Lipid Antagonist.Molecular neurobiology · 2025Article
- The role of peripheral innate immune cells in Alzheimer's disease progression.Frontiers in immunology · 2025Review
- Glioinflammation: disease-associated microglia and astrocytes in psychiatric disorders, neurodegeneration, and senescence.Frontiers in cellular neuroscience · 2025Review
- Thinking outside the brain: Gut microbiome influence on innate immunity within neurodegenerative disease.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2024Review
- Improving Blood Monocyte Energy Metabolism Enhances Its Ability to Phagocytose Amyloid-β and Prevents Alzheimer's Disease-Type Pathology and Cognitive Deficits.Neuroscience bulletin · 2023Article
- Monocyte-derived cells invade brain parenchyma and amyloid plaques in human Alzheimer's disease hippocampus.Acta neuropathologica communications · 2023Article
- Genetic insights into immune mechanisms of Alzheimer's and Parkinson's disease.Frontiers in immunology · 2023Review
- Identification of Leukocyte Surface P2X7 as a Biomarker Associated with Alzheimer's Disease.International journal of molecular sciences · 2022Article
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Authors and funding
7 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe role of neuroinflammation has become more evident in the pathogenesis of neurodegenerative diseases. Increased expression of microglial markers is widely reported in Alzheimer's disease (AD), but much less is known about the role of monocytes in AD pathogenesis. In AD animal models, bone marrow-derived monocytes appear to infiltrate the parenchyma and contribute to the phagocytosis of amyloid-β depositions, but this infiltration has not been established in systematic studies of the human brain postmortem.
objectiveIn addition to assessing the distribution of different subtypes of microglia by immunostaining for CD68, HLA-DR, CD163, and CD206, we focused on the involvement of C-chemokine receptor type2 (CCR2) positive monocytes during the AD course.
methodsWe used formalin-fixed and paraffin-embedded tissue from four vulnerable brain regions (hippocampus, occipital lobe, brainstem, and cerebellum) from neuropathologically characterized AD cases at different Braak stages and age-matched controls.
resultsOnly singular migrated CCR2-positive cells were found in all brain regions and stages. The brainstem showed the highest number of positive cells overall, followed by the hippocampus. This mechanism of recruitment seems to work less efficiently in the human brain at an advanced age, and the ingress of monocytes obviously takes place in much reduced numbers or not at all.
conclusionIn contrast to studies on animal models, we observed only a quite low level of myeloid monocytes associated with AD pathology. Furthermore, we provide evidence associating early microglial reactions carried out in particular by pro-inflammatory cells with early effects on tangle- and plaque-positive vulnerable brain regions.
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