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Lewy body-related alpha-synucleinopathy in aging
Yuko Saito1, Nyoka N Ruberu, Motoji Sawabe
1Department of Neuropathology, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan.
Journal of Neuropathology and Experimental Neurology
|August 5, 2004
Summary
Lewy bodies (LBs) and alpha-synucleinopathy are linked to aging and cognitive decline. This study found LBs increase with age and correlate with cognitive impairment, especially in advanced stages.
Area of Science:
- Neurology
- Pathology
- Aging Research
Background:
- Lewy body (LB)-related alpha-synucleinopathy is a key feature in neurodegenerative diseases.
- Its role and prevalence in aging require further clarification.
Purpose of the Study:
- To investigate the incidence and staging of LB pathology in a large autopsy cohort.
- To explore associations between LB pathology, age, gender, and other neuropathological markers.
Main Methods:
- Histological examination of 1,241 autopsy cases using hematoxylin and eosin, anti-ubiquitin, and anti-alpha-synuclein antibodies.
- Classification of LB pathology into five stages (0-V) based on severity and clinical correlation.
- Analysis of demographic data, genetic polymorphisms (paraoxonase I), and co-pathologies (neurofibrillary tangles, senile plaques, APOE ε4).
Main Results:
- LB pathology was identified in a significant proportion of cases, with higher incidence in older individuals.
- LB stage V (neocortical form of dementia with Lewy bodies) showed increased neurofibrillary tangle and senile plaque burden, and higher APOE ε4 frequency.
- A G842A polymorphism in the paraoxonase I gene was associated with LB stage II or higher in men, suggesting a gender-specific risk factor.
Conclusions:
- Lewy bodies are associated with aging and cognitive decline.
- LB pathology can occur independently or synergistically with other pathologies like Alzheimer's disease-related changes.
- Specific genetic factors may influence LB pathology development in a gender-specific manner.