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Regional differences in apolipoprotein E immunoreactivity in diffuse plaques in Alzheimer's disease brain
E Kida1, A A Golabek, T Wisniewski
1New York State Institute for Basic Research, Department of Pathological Neurobiology, Staten Island 10314.
Neuroscience Letters
|February 14, 1994
Summary
Apolipoprotein E (Apo E) is found in amyloid cores of Alzheimer's brain plaques. Its presence in diffuse plaques varies by brain region, suggesting local factors influence beta-amyloid fibril formation.
Area of Science:
- Neuroscience
- Biochemistry
Background:
- Apolipoprotein E (Apo E) is implicated in Alzheimer's disease (AD) pathology.
- Apo E is known to interact with beta-amyloid (Aβ) in the AD brain.
Purpose of the Study:
- To investigate the distribution and association of Apo E within senile plaques (SPs) in the Alzheimer's disease brain.
- To explore the relationship between Apo E localization and beta-amyloid fibril formation in different brain regions.
Main Methods:
- Immunohistochemical analysis of brain tissue from Alzheimer's disease patients.
- Detection of Apo E and beta-amyloid presence in senile plaques using immunoreactivity.
Main Results:
- Strong Apo E immunoreactivity was observed in the amyloid cores of senile plaques across examined brain regions.
- Apo E immunoreactivity in diffuse plaques showed distinct regional variation: strong in cerebellar and cortical diffuse plaques, but weak or absent in striatum/thalamus.
- The distribution pattern of Apo E in SPs correlates with known regional differences in fibrillar amyloid occurrence.
Conclusions:
- Apo E is associated with sites of beta-amyloid fibril formation in diffuse plaques within the Alzheimer's disease brain.
- Local factors, beyond Apo E, likely play a significant role in influencing beta-amyloid fibrillogenesis in different brain areas.