Abstract
We have mapped the neuroanatomical distribution of amyloid-beta-protein mRNA within neuronal subpopulations of the hippocampal formation in the cynomolgus monkey (Macaca fascicularis), normal aged human, and patients with Alzheimer disease. Amyloid-beta-protein mRNA appears to be expressed in all hippocampal neurons, but at different levels of abundance. In the central nervous system of monkey and normal aged human, image analysis shows that neurons of the dentate gyrus and cornu Ammonis fields contain a 2.5-times-greater hybridization signal than is present in neurons of the subiculum and entorhinal cortex. In contrast, in the Alzheimer disease hippocampal formation, the levels of amyloid-beta-protein mRNA in the cornu Ammonis field 3 and parasubiculum are equivalent. These findings suggest that within certain neuronal subpopulations cell type-specific regulation of amyloid-beta-protein gene expression may be altered in Alzheimer disease.
MeSH Terms
Aged
Aged, 80 and over
Amyloid/biosynthesis
Amyloid beta-Peptides
Animals
DNA/genetics
Gene Expression Regulation
Hippocampus/metabolism
Humans
Macaca fascicularis
Male
Neurons/classification,metabolism
Nucleic Acid Hybridization
RNA, Messenger/biosynthesis
Chemicals
Amyloid
Amyloid beta-Peptides
RNA, Messenger
DNA
Authors & Affiliations
8 authors, click to expand affiliations / ORCID
Higgins G A
Department of Molecular Biology, Research Institute of Scripps Clinic, La Jolla, CA 92037.
Lewis D A
Bahmanyar S
Goldgaber D
Gajdusek D C
Young W G
Morrison J H
Wilson M C
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