| First Author | Hübener J | Year | 2010 |
| Journal | Neurobiol Dis | Volume | 38 |
| Issue | 1 | Pages | 116-24 |
| PubMed ID | 20079840 | Mgi Jnum | J:159934 |
| Mgi Id | MGI:4453081 | Doi | 10.1016/j.nbd.2010.01.005 |
| Citation | Hubener J, et al. (2010) Polyglutamine-induced neurodegeneration in SCA3 is not mitigated by non-expanded ataxin-3: conclusions from double-transgenic mouse models. Neurobiol Dis 38(1):116-24 |
| abstractText | A crucial question in polyQ-induced neurodegeneration is the influence of wild type protein on the formation of aggregates and toxicity. Recently it was shown that non-expanded ataxin-3 protein mitigated neurodegeneration in a Drosophila and mouse model of SCA3. We now explored the effects of overexpressing non-expanded ataxin-3 with 15Q in a SCA3 transgenic mouse model with 70 polyglutamine repeats. These double-transgenic mice (dt) developed neurological symptoms with premature death at the age of 6 months comparable to the single-transgenic (st) SCA3 disease model. Furthermore, immunohistochemistry revealed similar localization and distribution of nuclear aggregates in dt- and st-mutant SCA3 mice. In a second dt-mutant mouse model, coexpression of ataxin-3 with 148Q attached to a nuclear export signal, which usually diminishes the phenotype, did even reinforce toxic effects of mutant expanded ataxin-3. We therefore conclude that overexpressing wild type ataxin-3 or mutant ataxin-3 with NES are not striking suppressors of polyglutamine-induced neurodegeneration and have thus no potential for future gene therapeutic interventions in SCA3. |
