Elsevier

Neurobiology of Aging

Volume 10, Issue 5, September–October 1989, Pages 593-602
Neurobiology of Aging

Review
Excitatory amino acids and Alzheimer's disease

https://doi.org/10.1016/0197-4580(89)90143-7Get rights and content

Abstract

Excitatory amino acids (EAA) such as glutamate and aspartate are major transmitters of the cerebral cortex and hippocampus and EAA mechanisms appear to play a role in learning and memory. Anatomical and biochemical evidence suggests that there is both pre- and postsynaptic disruption of EAA pathways in Alzheimer's disease. Dysfunction of EAA pathways could play a role in the clinical manifestations of Alzheimer's disease, such as memory loss and signs of cortical disconnection. Furthermore, EAA might be involved in the pathogenesis of Alzheimer's disease, by virtue of their neurotoxic (excitotoxic) properties. Circumstantial evidence raises the possibility that the EAA system may partially determine the distribution of pathology in Alzheimer's disease and may be important in producing the neurofibrillary tangles, RNA reductions and dendritic changes which characterize this devastating disorder. In this article, we will review the evidence suggesting a role for EAA in the clinical manifestations and pathogenesis of Alzheimer's disease.

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