Difference in toxicity of β-amyloid peptide with aging in relation to nerve growth factor content in rat brain
- 1 June 2001
- journal article
- Published by Springer Nature in Journal Of Neural Transmission-Parkinsons Disease and Dementia Section
- Vol. 108 (2) , 221-230
- https://doi.org/10.1007/s007020170090
Abstract
Amyloid beta-peptide (Abeta) is the major constituent of the senile plaques in the brains of patients with Alzheimer's disease. We have demonstrated previously that memory impairment, dysfunction of the cholinergic and dopaminergic neuronal system and morphological degeneration are produced after the continuous infusion of Abeta into the cerebral ventricle in 8-week-old rat. In the present study, we investigated the toxicity of Abeta in infant (10 days old), adult (8 weeks old) and aged (20 months old) rats in relation to nerve growth factor (NGF) content in various regions of the brain. After a 2-week-infusion, choline acetyltransferase (ChAT) activity was significantly decreased in the hippocampus of adult, but not infant or aged rats. NGF levels in the hippocampus were increased only in adult rats. These results suggest that Abeta is toxic only in the matured adult brain, and that the mechanism of toxicity is related to NGF synthesis.Keywords
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