Journal
BRAIN RESEARCH
Volume 1366, Issue -, Pages 162-171Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.brainres.2010.09.107
Keywords
down syndrome; trisomy 21; mouse models; cognitive deficits; long-term potentiation
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Funding
- Roswell Park Alliance Foundation
- Louis Sklarow Memorial Fund
- Fondation Jerome Lejeune
- Children's Guild Foundation
- NIH [R01HL091519, R01NS066072, P30CA016056]
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As the genomic basis for Down syndrome (DS), human trisomy 21 is the most common genetic cause of intellectual disability in children and young people. The genomic regions on human chromosome 21 (Hsa21) are syntenic to three regions in the mouse genome, located on mouse chromosome 10 (Mmu10), Mmu16, and Mmu17. Recently, we have developed three new mouse models using chromosome engineering carrying the genotypes of Dp(10) 1Yey/+, Dp(16)1Yey/+, or Dp(17)1Yey/+, which harbor a duplication spanning the entire Hsa21 syntenic region on Mmu10, Mmu16, or Mmu17, respectively. In this study, we analyzed the hippocampal long-term potentiation (LTP) and cognitive behaviors of these models. Our results show that, while the genotype of Dp(17)1Yey/+ results in abnormal hippocampal LTP, the genotype of Dp(16)1Yey/+ leads to both abnormal hippocampal LTP and impaired learning/memory. Therefore, these mutant mice can serve as powerful tools for further understanding the mechanism underlying cognitively relevant phenotypes associated with DS, particularly the impacts of different syntenic regions on these phenotypes. (C) 2010 Elsevier B.V. All rights reserved.
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