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- W2105303722 abstract "Huntington disease (HD) is an adult onset neurodegenerative disorder that predominantly affects the striatum and cortex despite ubiquitous expression of mutant huntingtin (htt). Here we demonstrate that this pattern of selective degeneration is present in the YAC128 mouse model of HD. At 12 months, YAC128 mice show significant atrophy in the striatum, globus pallidus and cortex with relative sparing of the hippocampus and cerebellum (striatum: -10.4%, P<0.001; globus pallidus: -10.8%, P=0.04; cortex: -8.6%, P=0.001; hippocampus: +0.3%, P=0.9; cerebellum: +2.9%, P=0.6). Similarly, neuronal loss at this age is present in the striatum (-9.1%, P<0.001) and cortex of YAC128 mice (-8.3%, P=0.02) but is not detected in the hippocampus (+1.5%, P=0.72). Mutant htt expression levels are similar throughout the brain and fail to explain the selective neuronal degeneration. In contrast, nuclear detection of mutant htt occurs earliest and to the greatest extent in the striatum-the region most affected in HD. The appearance of EM48-reactive mutant htt in the nucleus in the striatum at 2 months coincides with the onset of behavioral abnormalities in YAC128 mice. In contrast to YAC128 mice, the R6/1 mouse model of HD, which expresses exon 1 of mutant htt, exhibits non-selective, widespread atrophy along with non-selective nuclear detection of mutant htt at 10 months of age. Our findings suggest that selective nuclear localization of mutant htt may contribute to the selective degeneration in HD and that appropriately regulated expression of full-length mutant htt in YAC128 mice results in a pattern of degeneration remarkably similar to human HD." @default.
- W2105303722 created "2016-06-24" @default.
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- W2105303722 date "2005-11-08" @default.
- W2105303722 modified "2023-09-24" @default.
- W2105303722 title "Selective degeneration and nuclear localization of mutant huntingtin in the YAC128 mouse model of Huntington disease" @default.
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- W2105303722 doi "https://doi.org/10.1093/hmg/ddi407" @default.
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