کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2198837 | 1099408 | 2010 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Modest proteasomal inhibition by aberrant ubiquitin exacerbates aggregate formation in a Huntington disease mouse model Modest proteasomal inhibition by aberrant ubiquitin exacerbates aggregate formation in a Huntington disease mouse model](/preview/png/2198837.png)
UBB+1, a mutant form of ubiquitin, is both a substrate and an inhibitor of the proteasome which accumulates in the neuropathological hallmarks of Huntington disease (HD). In vitro, expression of UBB+1 and mutant huntingtin synergistically increase aggregate formation and polyglutamine induced cell death. We generated a UBB+1 transgenic mouse line expressing UBB+1 within the neurons of the striatum. In these mice lentiviral driven expression of expanded huntingtin constructs in the striatum results in a significant increase in neuronal inclusion formation. Although UBB+1 transgenic mice show neither a decreased lifespan nor apparent neuronal loss, they appear to be more vulnerable to toxic insults like expanded polyglutamine proteins due to a modest proteasome inhibition. These findings underscore the relevance of an efficient ubiquitin–proteasome system in HD.
Journal: Molecular and Cellular Neuroscience - Volume 43, Issue 3, March 2010, Pages 281–286