Hippocampal Subfields Volume: Another Hint of the Continuum Between CAA and AD?
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View abstract on PubMed
Summary
This summary is machine-generated.Cerebral amyloid angiopathy (CAA) patients with Alzheimer's disease (AD)-like cerebrospinal fluid profiles showed reduced CA2-CA3 hippocampal subfield volumes. This CA2-CA3 atrophy may indicate biological overlaps between CAA and AD, distinct from total hippocampal volume changes.
Area Of Science
- Neuroimaging
- Neuropathology
- Biomarkers
Background
- Cerebral amyloid angiopathy (CAA) is a cerebrovascular disease often co-occurring with Alzheimer's disease (AD).
- Investigating shared radiological features can elucidate the relationship between CAA and AD pathology.
- This study focuses on specific brain volume changes in CAA patients with an AD-like cerebrospinal fluid (CSF) profile.
Purpose Of The Study
- To determine if CAA patients with an AD-like CSF profile exhibit reduced hippocampal and amygdala volumes on MRI.
- To identify specific radiological markers that differentiate CAA patients with and without AD-like CSF profiles.
Main Methods
- Analysis of 44 probable CAA cases using CSF biomarkers (Aβ42, Aβ40, p-Tau181) and brain MRI.
- Classification of patients into CAA/AD+ (AD-like CSF) and CAA/AD- groups based on CSF thresholds.
- Volumetric assessment of total hippocampal and amygdala volumes, and hippocampal subfields (CA2-CA3) using volBrain software.
Main Results
- CAA/AD+ patients were older than CAA/AD- patients.
- No significant differences were found in total hippocampal or amygdala volumes between the groups.
- CAA/AD+ patients exhibited significantly lower CA2-CA3 hippocampal subfield volume and its ratio to total intracranial volume.
Conclusions
- CA2-CA3 hippocampal subfield atrophy is a distinctive radiological feature in CAA patients with an AD-like CSF profile.
- This atrophy may be linked to tau pathology and suggests biological overlap between CAA and AD.
- CA2-CA3 volume could serve as a potential radiological marker for identifying CAA-AD biological links.
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