The Neurovascular Unit Dysfunction in Alzheimer's Disease.

Area of Science:

• Neuroscience
• Pathology
• Vascular Biology

Background:

• Alzheimer's disease (AD) is a leading cause of dementia worldwide.
• AD pathology is characterized by neurofibrillary tangles (NFTs) and amyloid-beta (Aβ) peptide aggregates, forming plaques and cerebral amyloid angiopathy (CAA).
• The vascular hypothesis of AD links vascular risk factors to neurovascular unit (NVU) dysfunction and hypoxia, potentially exacerbating Aβ accumulation.

Purpose of the Study:

• To review the pathogenesis of Alzheimer's disease focusing on neurovascular unit (NVU) dysfunction.
• To explore the role of hypoxia in amyloid-beta (Aβ) production and clearance.
• To identify potential therapeutic targets within the NVU for Alzheimer's disease treatment.

Main Methods:

• Review of existing literature on Alzheimer's disease pathogenesis.
• Analysis of the role of vascular risk factors and hypoxia in AD.
• Examination of current and proposed therapeutic strategies targeting Aβ and tau.

Main Results:

• Vascular risk factors can disrupt the NVU, leading to hypoxia.
• Hypoxia may increase Aβ production and decrease its clearance, contributing to AD pathology.
• Previous therapeutic approaches targeting Aβ or tau have shown limited success and potential side effects.

Conclusions:

• Dysfunction of the NVU is a critical factor in Alzheimer's disease pathogenesis.
• Targeting NVU dysfunction presents a promising avenue for novel AD therapies.
• Further research into NVU-centric therapeutic strategies is warranted to improve cognitive outcomes.