Different effects of oxidative stress on activation of transcription factors in primary cultured rat neuronal and glial cells

Emi Iwata, Masato Asanuma, Sakiko Nishibayashi, Yoichi Kondo, Norio Ogawa

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

We compared the cytotoxic effects of oxidative stress on neuronal and glial cells in vitro by examining the cell viability and changes in DNA-binding activities of transcription factors, AP-1 and CREB, using Trypan blue exclusion and electrophoretic mobility shift assay (EMSA), respectively. Neurotoxin 6-hydroxydopamine (6-OHDA) and H2O2 reduced the viability of both types of cells in time- and concentration-dependent manner. Both neurotoxins dose-dependently decreased DNA-binding activities in neuronal cells. The results of cell viability assay suggested that these changes may reflect the reduction in neuronal cell viability. In contrast, both reagents increased DNA-binding activities in glial cells, although they decreased cell numbers. These results suggest that the effects of oxidative stress on transcription factors is different in neuronal and glial cells. We also examined the effect of brain-derived neurotrophic factor (BDNF) on 6-OHDA- or H2O2-induced changes in DNA-binding activities. In neuronal cells, pre-treatment with BDNF prevented the decrease in DNA-binding activities induced by 6-OHDA or H2O2. In glial cells, the effect of BDNF on oxidative stress-induced changes in DNA-binding activities in the 6-OHDA-treated group were opposite to those in H2O2-treated group. Our results suggest that 6-OHDA and H2O2 may exert their cytotoxic mechanisms through different signal transduction systems.

Original languageEnglish
Pages (from-to)213-220
Number of pages8
JournalMolecular Brain Research
Volume50
Issue number1-2
DOIs
Publication statusPublished - Oct 15 1997

Keywords

  • Brain derived neurotrophic factor
  • Cell viability
  • Culture
  • DNA binding activity
  • Glia
  • Neuron
  • Oxidative stress
  • Transcription factor

ASJC Scopus subject areas

  • Molecular Biology
  • Cellular and Molecular Neuroscience

Fingerprint Dive into the research topics of 'Different effects of oxidative stress on activation of transcription factors in primary cultured rat neuronal and glial cells'. Together they form a unique fingerprint.

  • Cite this