The dichotomous activities of microglia: A potential driver for phenotypic heterogeneity in Alzheimer's disease
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1Université d'Angers, Faculté de Santé, Département Pharmacie, 16, Boulevard Daviers, Angers 49045, France.
Abstract:
Alzheimer's disease (AD) is a leading cause of dementia, characterized by two defining neuropathological hallmarks: amyloid plaques composed of Aβ aggregates and neurofibrillary pathology. Recent research suggests that microglia have both beneficial and detrimental effects in the development of AD. A new theory proposes that microglia play a beneficial role in the early stages of the disease but become harmful in later stages. Further investigations are needed to gain a comprehensive understanding of this shift in microglia's function. This transition is likely influenced by specific conditions, including spatial, temporal, and transcriptional factors, which ultimately lead to the deterioration of microglial functionality. Additionally, recent studies have also highlighted the potential influence of microglia diversity on the various manifestations of AD. By deciphering the multiple states of microglia and the phenotypic heterogeneity in AD, significant progress can be made towards personalized medicine and better treatment outcomes for individuals affected by AD.
Insights
Microglia, the brain's immune cells, initially protect against Alzheimer's disease (AD) but later contribute to its progression. Understanding this shift and microglia diversity is key for developing new AD treatments.
Area of Science:
- Neuroscience
- Immunology
- Pathology
Background:
- Alzheimer's disease (AD) is a neurodegenerative disorder defined by amyloid plaques and neurofibrillary tangles.
- Microglia, the central nervous system's immune cells, exhibit dual roles in AD pathogenesis.
- Emerging evidence suggests a dynamic shift in microglial function throughout AD progression.
Purpose of the Study:
- To explore the evolving role of microglia in Alzheimer's disease.
- To investigate the factors influencing the transition of microglia from beneficial to detrimental.
- To understand how microglial diversity impacts AD phenotypes and treatment strategies.
Main Methods:
- Review of recent scientific literature on microglial function in AD.
- Analysis of proposed theories on the temporal and spatial shifts in microglial activity.
- Examination of studies investigating microglial heterogeneity and transcriptional states.
Main Results:
- Microglia may exert protective effects in early AD stages.
- Microglial functionality can deteriorate due to spatial, temporal, and transcriptional factors in later AD stages.
- Microglial diversity is linked to varied AD manifestations.
Conclusions:
- A comprehensive understanding of the microglia functional shift is crucial for AD research.
- Deciphering microglial states and heterogeneity can advance personalized medicine for AD.
- Targeting specific microglial phenotypes may offer improved therapeutic outcomes for Alzheimer's disease.
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