Cholinergic denervation in a pure multi-infarct state: observations on CADASIL
Marsel Mesulam1, Teepu Siddique, Bruce Cohen
1Cognitive Neurology and Alzheimer's Disease Center and the Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA. mmesulam@northwestern.edu
Neurology
|April 12, 2003
Summary
Vascular dementia (VaD) may involve cholinergic denervation. A unique patient case demonstrated that white matter infarcts can cause this, offering new insights into VaD pathology distinct from Alzheimer's disease (AD).
Area of Science:
- Neuroscience
- Neurology
- Pathology
Background:
- Cholinergic deficits are suspected in vascular dementia (VaD).
- Assessing this link is challenging due to confounding factors like aging and Alzheimer's disease (AD) in patients.
- Cerebral autosomal-dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) provides a model for studying pure white matter infarcts.
Observation:
- A young patient (36 years old) with CADASIL experienced pure white matter infarcts.
- These infarcts were morphologically similar to those observed in VaD.
- The study examined the resulting cortical cholinergic denervation patterns.
Findings:
- Pure white matter infarcts, as seen in CADASIL, can lead to cortical cholinergic denervation.
- The pattern of denervation observed in this case differs from that typically seen in Alzheimer's disease (AD).
- This suggests a specific mechanism of cholinergic system involvement in VaD.
Implications:
- The findings support a role for cholinergic denervation in vascular dementia (VaD).
- This case highlights a distinct pattern of cholinergic deficit in VaD compared to Alzheimer's disease (AD).
- Understanding these specific patterns may aid in differential diagnosis and targeted therapies for dementia.
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