期刊
JOURNAL OF NEUROSCIENCE
卷 26, 期 29, 页码 7597-7606出版社
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.0990-06.2006
关键词
polyglutamine; aggregates; neurotoxicity; C. elegans; FRET; FRAP
资金
- NIGMS NIH HHS [T32 GM08061] Funding Source: Medline
The basis of neuron-specific pathogenesis, resulting from the expression of misfolded proteins, is poorly understood and of central importance to an understanding of the cell-type specificity of neurodegenerative disease. In this study, we developed a new model for neuron-specific polyQ pathogenesis in Caenorhabditis elegans by pan-neuronal expression that exhibits polyQ length-dependent aggregation, neurotoxicity, and a pathogenic threshold at a length of 35-40 glutamines. Analysis of specific neurons in C. elegans revealed that only at the threshold length, but not at shorter or longer lengths, polyQ proteins can exist in a soluble state in certain lateral neurons or in an aggregated state in motor neurons of the same animal. These results provide direct experimental evidence that the expression of a single species of a toxic misfolded protein can exhibit a range of neuronal consequences.
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