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Updated: Jul 5, 2026

Obtaining Human Microglia from Adult Human Brain Tissue
Published on: August 30, 2020
The intricate interplay between microglia and adult neurogenesis in Alzheimer's disease
Iris Früholz1,2,3, Melanie Meyer-Luehmann1,2
1Department of Neurology, Medical Center - University of Freiburg, Freiburg, Germany.
Abstract:
Microglia, the resident immune cells of the central nervous system, play a crucial role in regulating adult neurogenesis and contribute significantly to the pathogenesis of Alzheimer's disease (AD). Under physiological conditions, microglia support and modulate neurogenesis through the secretion of neurotrophic factors, phagocytosis of apoptotic cells, and synaptic pruning, thereby promoting the proliferation, differentiation, and survival of neural progenitor cells (NPCs). However, in AD, microglial function becomes dysregulated, leading to chronic neuroinflammation and impaired neurogenesis. This review explores the intricate interplay between microglia and adult neurogenesis in health and AD, synthesizing recent findings to provide a comprehensive overview of the current understanding of microglia-mediated regulation of adult neurogenesis. Furthermore, it highlights the potential of microglia-targeted therapies to modulate neurogenesis and offers insights into potential avenues for developing novel therapeutic interventions.
Insights
Microglia, the brain's immune cells, support neural progenitor cell (NPC) growth in healthy brains. In Alzheimer's disease (AD), their dysfunction impairs neurogenesis, highlighting therapeutic potential.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Microglia are central nervous system immune cells vital for brain health.
- They regulate adult neurogenesis, the birth of new neurons.
- Dysfunctional microglia contribute to Alzheimer's disease (AD) pathogenesis.
Purpose of the Study:
- To review the dual role of microglia in adult neurogenesis.
- To explore microglia-mediated neurogenesis in health versus AD.
- To highlight microglia-targeted therapies for AD.
Main Methods:
- Literature review and synthesis of current research.
- Analysis of microglial functions in neurogenesis.
- Examination of AD-associated neuroinflammation and neurogenesis impairment.
Main Results:
- Physiologically, microglia promote neural progenitor cell (NPC) proliferation, differentiation, and survival.
- In AD, microglia-induced neuroinflammation disrupts neurogenesis.
- Microglial dysregulation exacerbates AD pathology.
Conclusions:
- Microglia critically modulate adult neurogenesis in both health and AD.
- Targeting microglial function offers a promising therapeutic strategy for AD.
- Further research into microglia-neurogenesis interactions may yield novel treatments.
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