Alteration of global protein SUMOylation in neurons and astrocytes in response to Alzheimer's disease-associated insults

Takuma Maruyama, Harmony Wada, Yoichiro Abe, Takako Niikura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

SUMOylation, a post-translational modification of lysine residues by small ubiquitin-like modifier (SUMO) proteins, has been implicated in the pathogenesis of neurodegenerative disorders including Alzheimer's disease (AD), and in neuron- and astrocyte-specific physiological functions. Global SUMOylation is increased in the AD mouse brain in the pre-plaque-forming stage but returns to wild-type levels in the plaque-bearing stage. To clarify the reason for the transient change in SUMOylation, we analyzed the alteration of global SUMOylation induced by AD-associated cytotoxic stimuli in neurons and astrocytes individually. In neurons, amyloid β42 oligomers induced some but not significant increase in levels of SUMO1-modified proteins. Both hydrogen peroxide and glutamate significantly reduced SUMO1-modified protein levels. These changes were more prominent in neurons than in astrocytes. The opposite effect of Aβ and oxidative/excitotoxic stimuli on SUMO1 modification may cause the pathological stage-associated change in the level of SUMO-modified proteins in the AD mouse brain.

Original languageEnglish
Pages (from-to)470-475
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume500
Issue number2
DOIs
Publication statusPublished - 2018 Jun 2

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Keywords

  • Alzheimer's disease
  • Amyloid β
  • Glutamate
  • Hydrogen peroxide
  • SUMO

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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