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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Epstein, C. J. Mckinley, M. P. Mobley, W. C. Li, Y. W. Dearmond, S. J. Holtzman, D. M. Gage, F. H. |
| Description | Author Affiliation: Holtzman DM ( Department of Neurology, University of California, San Francisco 94143.); |
| Abstract | Vulnerability of specific brain regions and neuronal populations is a characteristic feature of Alzheimer disease and Down syndrome. Cholinergic neurons of the basal forebrain degenerate in both disorders. The basis for neuronal degeneration is unknown. Mouse trisomy 16 (Ts 16) is an animal model of Down syndrome. We sought an experimental system in which the survival and development of Ts 16 basal forebrain cholinergic neurons could be examined beyond the fetal period. As Ts 16 mice do not survive birth, we transplanted fetal Ts 16 and control basal forebrain into the hippocampus of young adult mice. Transplanted neurons survived and grew neurites in all grafts. Over time, we observed selective atrophy of cholinergic neurons in Ts 16 grafts. Denervation of the hippocampus produced a significant increase in the size of Ts 16 cholinergic neurons. This suggests that hippocampal-derived neurotrophic factors acted to prevent degeneration. beta/A4-amyloid-containing plaques were not seen. Ts 16 provides a model of spontaneous, genetically determined neurodegeneration that may be used to understand better the molecular pathogenesis of neuronal dysfunction in Alzheimer disease and Down syndrome. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 4 |
| Volume Number | 89 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1992-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cholinergic Fibers Pathology Nerve Degeneration Alzheimer Disease Genetics Amyloid Beta-Protein Precursor Metabolism Animals Brain Embryology Brain Tissue Transplantation Disease Models, Animal Hippocampus Immunohistochemistry Mice Trisomy Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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