Comorbid amyloid-β pathology affects clinical and imaging features in VCD

Area of Science:

• Neurology
• Neuroscience
• Gerontology

Background:

• Vascular cognitive disorders (VCD) are a leading cause of dementia.
• The clinical significance of comorbid amyloid-beta (Aβ) pathology in VCD remains poorly understood.
• Understanding Aβ's role is crucial for VCD diagnosis and treatment.

Purpose of the Study:

• To investigate the clinical relevance of comorbid amyloid-beta (Aβ) pathology in patients with vascular cognitive disorders (VCD).
• To examine how Aβ status influences depression, cognitive function, and brain imaging markers in mild and major VCD.
• To determine if Aβ pathology modifies the presentation of VCD based on disease severity.

Main Methods:

• Included 218 VCD patients with cerebrospinal fluid Aβ42 levels.
• Categorized patients into Aβ+ and Aβ- groups for mild and major VCD.
• Assessed depression, cognition via neuropsychological testing, and brain structure (WMH, atrophy) via MRI.

Main Results:

• Aβ- VCD patients exhibited more depressive symptoms than Aβ+ patients.
• In major VCD, Aβ- patients showed poorer attention and executive function.
• Mild VCD showed no cognitive differences; WMH patterns varied by Aβ status and VCD severity.

Conclusions:

• Comorbid Aβ pathology significantly impacts the clinical manifestation of VCD.
• The effects of Aβ pathology on VCD differ depending on the severity of the vascular cognitive disorder.
• Further research is needed to elucidate the complex interplay between Aβ and VCD.