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Neuropathological evaluation and apolipoprotein E gene polymorphism analysis in diffuse Lewy body disease
C Kawanishi1, K Suzuki, T Odawara
1Department of Psychiatry, Yokohama City University, School of Medicine, Japan.
Journal of the Neurological Sciences
|March 1, 1996
Summary
Diffuse Lewy body disease (DLBD) brains show abundant amyloid plaques, similar to Alzheimer-type dementia (ATD), but fewer tangles. Apolipoprotein E (APOE) epsilon 4 allele frequency in DLBD mirrors that of ATD, suggesting shared amyloidogenesis pathways.
Area of Science:
- Neuropathology
- Neurodegenerative Diseases
- Genetics
Background:
- Diffuse Lewy body disease (DLBD) is a distinct neurodegenerative disorder.
- Alzheimer-type dementia (ATD) is characterized by amyloid plaques and neurofibrillary tangles.
- The role of apolipoprotein E (APOE) gene polymorphism in DLBD is not fully understood.
Purpose of the Study:
- To quantitatively investigate senile plaques and neurofibrillary tangles in DLBD brains.
- To examine the apolipoprotein E (APOE) gene polymorphism in Japanese patients with DLBD.
- To compare neuropathological findings in DLBD with those in ATD.
Main Methods:
- Quantitative neuropathological analysis of senile plaques and neurofibrillary tangles.
- Apolipoprotein E (APOE) gene polymorphism genotyping.
- Comparative analysis of DLBD and ATD neuropathology.
Main Results:
- DLBD brains exhibited a high density of senile plaques, comparable to ATD.
- Neurofibrillary tangle load was lower in DLBD compared to ATD.
- The frequency of the APOE epsilon 4 allele in DLBD patients was 39.3%, similar to ATD.
Conclusions:
- DLBD and ATD, while clinically distinct, may share common mechanisms in amyloid deposition.
- Findings suggest a potential link between APOE genotype and amyloid pathology in DLBD.
- Further research on pure DLBD forms is needed to elucidate the association with APOE.