Cell and Tissue Research

, Volume 301, Issue 1, pp 189–204

Cell death in polyglutamine diseases


  • Bernd O. Evert
    • Department of NeurologyUniversity of Bonn
  • Ullrich Wüllner
    • Department of NeurologyUniversity of Bonn
  • Thomas Klockgether
    • Department of NeurologyUniversity of Bonn

DOI: 10.1007/s004410000228

Cite this article as:
Evert, B., Wüllner, U. & Klockgether, T. Cell Tissue Res (2000) 301: 189. doi:10.1007/s004410000228


An increasing number of inherited neurodegenerative diseases are known to be caused by trinucleotide repeat expansions in the respective genes. At least nine disorders result from a CAG trinucleotide repeat expansion which is translated into a polyglutamine stretch in the respective proteins: Huntington's disease (HD), dentatorubral pallidolysian atrophy (DRPLA), spinal bulbar muscular atrophy (SBMA), and several of the spinocerebellar ataxias (SCA1, 2, 3, 6, 7 and 12). Although the molecular steps leading to the specific neuropathology of each disease are unknown and are still under intensive investigation, there is increasing evidence that some CAG repeat disorders involve the induction of apoptotic mechanisms. This review summarizes the clinical and genetic features of each CAG repeat disorder and focuses on the common mechanistic steps involved in the disease progression of these so-called polyglutamine diseases. Among the common molecular features the formation of intranuclear inclusions, the recruitment of interacting polyglutamine-containing proteins, the involvement of the proteasome and molecular chaperones, and the activation of caspases are discussed with regard to their potential implication for the induction of cell death.

Neurodegeneration Apoptosis Spinocerebellar ataxia Polyglutamine disease Aggregation Inclusions Caspases

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© Springer-Verlag 2000