Microglia-Mediated Neurovascular Unit Dysfunction in Alzheimer's Disease

Area of Science:

• Neuroscience
• Pathology
• Cell Biology

Background:

• The neurovascular unit (NVU) is crucial for central nervous system homeostasis.
• Alzheimer's disease (AD) involves pathological changes within the NVU.
• Microglia play a significant role in NVU dysfunction during AD progression.

Purpose of the Study:

• To review the mechanisms of microglia-mediated NVU dysfunction in Alzheimer's disease.
• To discuss current therapeutic strategies for restoring microglia and NVU function in AD.
• To highlight the future research focus on pericyte roles in microglia-mediated NVU dysfunction.

Main Methods:

• Literature review of mechanisms underlying microglia-mediated NVU dysfunction in AD.
• Analysis of existing therapeutic advancements targeting microglia and NVU in AD.
• Synthesis of current understanding and future predictions regarding pericyte involvement.

Main Results:

• Microglia induce blood-brain barrier breakdown via neuroinflammation, immune cell infiltration, and oxidative stress.
• Microglia mediate neurovascular uncoupling through neuronal mitochondrial dysfunction, cerebral vessel abnormalities, and pericyte loss.
• Microglia-induced dysfunction of astrocytes and pericytes further impairs NVU integrity in AD.

Conclusions:

• Microglia are key drivers of NVU impairment in Alzheimer's disease.
• Therapeutic strategies aimed at modulating microglial activity and restoring NVU function show promise for AD treatment.
• The role of pericytes in microglia-mediated NVU dysfunction represents a critical area for future research in AD.