Effect of the overexpression of mutant ubiquitin (K48R) on the cellular response induced by 4-hydroxy-2,3-trans-nonenal, an end-product of lipid peroxidation

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Impairment of the ubiquitin-proteasome system (UPS) for degrading abnormal proteins leads to protein aggregates and increased protein oxidation/nitration. This study was performed to show that interference with polyubiquitination in the presence of 4-hydroxy-2,3-. trans-nonenal (HNE) has similar consequences. Levels of polyubiquitin chains were not increased in NT-2 and SK-N-MC cells overexpressing a dominant-negative mutant form of ubiquitin (K48R) in response to HNE compared to wild-type transfectants. Increased oxidative (GSH, protein carbonyls and lipid peroxidation) and nitrative damage (nitric oxide production and elevated protein nitration) were aggravated in the mutant transfectants. These data show that initial oxidative/nitrative damage (due to HNE) and interference with ubiquitination (induced by mutant ubiquitin or HNE) can cause common characteristics of neurodegenerative diseases. These data suggest that impairment of the UPS at different levels may be a common mechanism in neurodegeneration and that more such defects remain to be identified.

Original languageEnglish
Pages (from-to)115-120
Number of pages6
JournalNeuroscience Letters
Volume477
Issue number3
DOIs
StatePublished - Jun 2010

Bibliographical note

Funding Information:
We thank Douglas A. Gray (Ottawa Cancer Regional Centre, Canada) for providing pEGFP-N1 and pDG vectors containing WT and mutant ubiquitins. This research was supported by the Ewha Womans University Research Grant of 2007, South Korea.

Keywords

  • 4-Hydroxy-2,3-trans-nonenal
  • Oxidative/nitrative damage
  • Proteasome
  • Ubiquitin

Fingerprint

Dive into the research topics of 'Effect of the overexpression of mutant ubiquitin (K48R) on the cellular response induced by 4-hydroxy-2,3-trans-nonenal, an end-product of lipid peroxidation'. Together they form a unique fingerprint.

Cite this