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Trehalose Reverses Cell Malfunction in Fibroblasts from Normal and Huntington's Disease Patients Caused by Proteosome Inhibition

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Listed:
  • Maria Angeles Fernandez-Estevez
  • Maria Jose Casarejos
  • Jose López Sendon
  • Juan Garcia Caldentey
  • Carolina Ruiz
  • Ana Gomez
  • Juan Perucho
  • Justo García de Yebenes
  • Maria Angeles Mena

Abstract

Huntington's disease (HD) is a neurodegenerative disorder characterized by progressive motor, cognitive and psychiatric deficits, associated with predominant loss of striatal neurons and is caused by polyglutamine expansion in the huntingtin protein. Mutant huntingtin protein and its fragments are resistant to protein degradation and produce a blockade of the ubiquitin proteasome system (UPS). In HD models, the proteasome inhibitor epoxomicin aggravates protein accumulation and the inductor of autophagy, trehalose, diminishes it. We have investigated the effects of epoxomicin and trehalose in skin fibroblasts of control and HD patients. Untreated HD fibroblasts have increased the levels of ubiquitinized proteins and higher levels of reactive oxygen species (ROS), huntingtin and the autophagy marker LAMP2A. Baseline replication rates were higher in HD than in controls fibroblasts but that was reverted after 12 passages. Epoxomicin increases the activated caspase-3, HSP70, huntingtin, ubiquitinated proteins and ROS levels in both HD and controls. Treatment with trehalose counteracts the increase in ROS, ubiquitinated proteins, huntingtin and activated caspase-3 levels induced by epoxomicin, and also increases the LC3 levels more in HD fibroblast than controls. These results suggest that trehalose could revert protein processing abnormalities in patients with Huntington's Disease.

Suggested Citation

  • Maria Angeles Fernandez-Estevez & Maria Jose Casarejos & Jose López Sendon & Juan Garcia Caldentey & Carolina Ruiz & Ana Gomez & Juan Perucho & Justo García de Yebenes & Maria Angeles Mena, 2014. "Trehalose Reverses Cell Malfunction in Fibroblasts from Normal and Huntington's Disease Patients Caused by Proteosome Inhibition," PLOS ONE, Public Library of Science, vol. 9(2), pages 1-9, February.
    • Handle: RePEc:plo:pone00:0090202
    DOI: 10.1371/journal.pone.0090202
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    1. Udai Bhan Pandey & Zhiping Nie & Yakup Batlevi & Brett A. McCray & Gillian P. Ritson & Natalia B. Nedelsky & Stephanie L. Schwartz & Nicholas A. DiProspero & Melanie A. Knight & Oren Schuldiner & Ranj, 2007. "HDAC6 rescues neurodegeneration and provides an essential link between autophagy and the UPS," Nature, Nature, vol. 447(7146), pages 860-864, June.
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