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Apolipoprotein E genotype in diverse neurodegenerative disorders
J A Schneider1, M Gearing, R S Robbins
1Veterans Affairs Medical Center, Decatur, GA 30033, USA.
Annals of Neurology
|July 1, 1995
Summary
The apolipoprotein E (ApoE) epsilon 4 allele may be linked to tau-related neurodegenerative diseases beyond Alzheimer's. Further research is needed to confirm this association with cytoskeletal pathology.
Area of Science:
- Neurology
- Genetics
- Pathology
Background:
- The apolipoprotein E (ApoE) epsilon 4 allele is a known risk factor for Alzheimer's disease (AD).
- The association between ApoE epsilon 4 and other neurodegenerative diseases (NDs) is less understood.
- Tau-related cytoskeletal pathology characterizes several NDs.
Purpose of the Study:
- To investigate the frequency of the ApoE epsilon 4 allele in various neuropathologically confirmed neurodegenerative diseases.
- To explore potential links between ApoE genotype and tau-related cytoskeletal pathology.
Main Methods:
- Examined 51 cases of neuropathologically confirmed neurodegenerative diseases.
- Excluded cases with sufficient pathology for an Alzheimer's disease diagnosis.
- Analyzed ApoE epsilon 4 allele frequencies in remaining cases, including those with Pick's disease, corticobasal degeneration, and progressive supranuclear palsy.
Main Results:
- Increased ApoE epsilon 4 frequencies were observed in three tau-related disorders: Pick's disease, corticobasal degeneration, and progressive supranuclear palsy.
- These increased frequencies did not reach statistical significance due to small sample sizes within each category.
- Beta-amyloid plaques were present in many cases, suggesting a possible independent association of epsilon 4 with amyloid deposition.
Conclusions:
- Preliminary findings suggest a potential association between the ApoE epsilon 4 allele and tau-related neurodegenerative diseases.
- The presence of beta-amyloid plaques may indicate an independent link between ApoE epsilon 4 and amyloid pathology.
- Further studies with well-characterized cases are necessary to elucidate the relationship between ApoE, cytoskeletal pathology, and neurodegeneration.