Related Experiment Videos
Complement activation in amyloid plaques in Alzheimer's dementia
P Eikelenboom1, C E Hack, J M Rozemuller
1Department of Psychiatry, Medical Faculty, Free University, Amsterdam, The Netherlands.
Virchows Archiv. B, Cell Pathology Including Molecular Pathology
|January 1, 1989
Summary
Alzheimer's dementia amyloid plaques show complement activation. Complement proteins are actively generated within plaques, not just passively deposited, suggesting a role in senile plaque development.
Area of Science:
- Neuroscience
- Immunology
- Biochemistry
Background:
- Alzheimer's dementia is characterized by amyloid plaques.
- Complement factors C1q, C4, and C3 have been found in these plaques.
Purpose of the Study:
- To demonstrate complement activation within amyloid plaques.
- To investigate the presence of specific complement components and activation products.
Main Methods:
- Immunoenzymatic techniques were employed.
- Specific antibodies against complement subunits and activated products were used.
Main Results:
- Amyloid plaques were found to contain C1q and activated C3 fragments (C3c, C3d, g).
- Absence of C1s and C3a indicates a specific activation pathway.
- Findings suggest active complement generation within plaques, not passive binding.
Conclusions:
- Complement activation occurs within amyloid plaques in Alzheimer's dementia.
- This active process may play a role in the formation and progression of senile plaques.