Microglia in Alzheimer's Disease: The Role of Stem Cell-Microglia Interaction in Brain Homeostasis
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1Department of Physiology and Neurophysiology Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. bagherimohammadi-sa@sbmu.ac.ir.
Abstract:
Microglia as resident cells of the brain can regulate neural development and maintenance of neuronal networks. Any types of pathologic events or changes in brain homeostasis are involved in the activation of microglia. This activation depends on the context, type of the stressor, or pathology. Due to the release of a plethora of substances such as chemokines, cytokines, and growth factors, microglia able to influence the pathologic outcome. In Alzheimer's disease (AD) condition, the deposition of amyloid-β (Aβ) result in provokes the phenotypic activation of microglia and their elaboration of pro-inflammatory molecules. New investigations reveal that cellular therapy with stem cells might have therapeutic effects in preventing the pathogenesis of AD. Although many strategies have focused on the use of stem cells to regenerate damaged neurons, new researches have demonstrated the immune-regulatory feature of stem cells which can modulate the activity state of microglia as well as mediates neuroinflammation. Hence, understanding the molecular mechanisms involved in the brain homeostasis by the protective features of mesenchymal stem cells (MSCs) could lead to remedial treatment for AD.
Insights
Mesenchymal stem cells (MSCs) show promise for Alzheimer's disease (AD) therapy by modulating microglia, the brain's immune cells. Understanding MSCs' protective mechanisms could offer new treatments for AD.
Area of Science:
- Neuroscience
- Immunology
- Regenerative Medicine
Background:
- Microglia are the brain's resident immune cells, crucial for neural development and network maintenance.
- Microglial activation is a hallmark of brain pathologies, including Alzheimer's disease (AD), driven by factors like amyloid-beta (Aβ) deposition.
- Activated microglia release inflammatory molecules that influence disease progression.
Purpose of the Study:
- To explore the therapeutic potential of mesenchymal stem cells (MSCs) in preventing Alzheimer's disease pathogenesis.
- To investigate the immune-regulatory properties of MSCs in modulating microglial activity and neuroinflammation.
- To understand the molecular mechanisms underlying MSC-mediated brain homeostasis.
Main Methods:
- Review of current research on microglia activation in AD.
- Analysis of studies investigating stem cell therapy for AD.
- Focus on the immunomodulatory effects of mesenchymal stem cells (MSCs).
Main Results:
- Mesenchymal stem cells (MSCs) exhibit therapeutic potential in preclinical models of AD.
- MSCs can modulate microglial activation states and reduce neuroinflammation.
- The immune-regulatory functions of MSCs are key to their neuroprotective effects.
Conclusions:
- Mesenchymal stem cells (MSCs) offer a promising avenue for Alzheimer's disease treatment by targeting neuroinflammation.
- Understanding the molecular basis of MSCs' protective actions is crucial for developing effective AD therapies.
- Cellular therapy with MSCs represents a novel strategy for managing AD pathogenesis.
