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beta-APP cognitive function versus beta-amyloid--induced cell death

M Gschwind¹, J R Martin, J L Moreau

¹Pharma Division, Preclinical CNS Research, F. Hoffmann-La Roche Ltd., Basel, Switzerland.

Annals of the New York Academy of Sciences

|January 17, 1996

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Beta-amyloid precursor proteins (beta-APPs) are involved in cognitive functions. The beta-amyloid (A beta) fragment, linked to Alzheimer

Area of Science:

Neuroscience
Cell Biology
Biochemistry

Background:

Beta-amyloid precursor protein (beta-APP) is implicated in synaptic formation.
Alzheimer's disease is characterized by the accumulation of beta-amyloid (A beta) fragments.

Purpose of the Study:

To investigate the role of beta-APPs in cognitive functions.
To evaluate the differential toxicity of A beta 1-42 on neuronal cell types.

Main Methods:

Intracerebroventricular injections of anti-beta APP antibodies in rats.
Exposure of four neuronal cell types to A beta 1-42 for 24 hours.

Main Results:

Anti-beta APP antibodies impaired memory retention in rats.
A beta 1-42 induced degeneration in all tested neuronal cells.

Related Experiment Videos

Apoptosis was observed in three out of four neuronal cell types exposed to A beta 1-42.

Conclusions:

Beta-APPs play a role in cognitive processes.
A beta exhibits differential toxicity, inducing cell death via necrosis or apoptosis in various neuronal types.