Alzheimer's Disease: The Link Between Amyloid-β and Neurovascular Dysfunction

Area of Science:

• Neuroscience
• Vascular Biology
• Alzheimer's Disease Research

Background:

• The amyloid cascade hypothesis is central to Alzheimer's disease (AD) pathology.
• Emerging evidence highlights the significant role of vascular dysfunction in AD progression.
• Vascular deficits, including reduced cerebral blood flow (CBF), precede hallmark AD pathologies like amyloid-β (Aβ) plaque accumulation.

Purpose of the Study:

• To review Alzheimer's disease vascular disturbances linked to amyloid-β.
• To emphasize the impact of Aβ on cerebral blood flow and neurovascular coupling.
• To discuss findings on the interplay between vascular defects and Aβ accumulation.

Main Methods:

• Review of existing literature on Alzheimer's disease and vascular pathology.
• Focus on in vivo studies utilizing rodent AD models.
• Analysis of Aβ effects on cerebral blood flow and neurovascular coupling.

Main Results:

• Vascular dysfunction, including chronic cerebral hypoperfusion and hypertension, is evident in AD.
• Amyloid-β impacts cerebral blood flow and neurovascular coupling.
• Deterioration of the blood-brain barrier is a key feature of AD vascular pathology.

Conclusions:

• Vascular disturbances are integral to Alzheimer's disease pathogenesis, not merely a consequence.
• Understanding the relationship between vascular health and Aβ is crucial for AD treatment strategies.
• Rodent AD models provide valuable insights into in vivo vascular changes associated with Aβ.