Polyglutamine proteins at the pathogenic threshold display neuron-specific aggregation in a pan-neuronal Caenorhabditis elegans model

Heather R. Brignull, Finola E. Moore, Stephanie J. Tang, Richard I. Morimoto*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

120 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)7597-7606
Number of pages10
JournalJournal of Neuroscience
Volume26
Issue number29
DOIs
StatePublished - 2006

Keywords

  • Aggregates
  • C. elegans
  • FRAP
  • FRET
  • Neurotoxicity
  • Polyglutamine

ASJC Scopus subject areas

  • Neuroscience(all)

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