Biophysics

, Volume 54, Issue 5, pp 617–620

Glutamate induces formation of free radicals in rat brain synaptosomes

  • A. V. Alekseenko
  • V. A. Kolos
  • T. V. Waseem
  • S. V. Fedorovich
Cell Biophysics

DOI: 10.1134/S000635090905011X

Cite this article as:
Alekseenko, A.V., Kolos, V.A., Waseem, T.V. et al. BIOPHYSICS (2009) 54: 617. doi:10.1134/S000635090905011X
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Abstract

The influence of glutamate and agonists of its ionotropic receptors on free radical formation in rat brain synaptosomes was investigated using the fluorescent dye DCFDA. Glutamate at concentrations of 100 μM and 1 mM increased the production of reactive oxygen species. This phenomenon was eliminated by removing calcium from the incubation medium. Addition of NMDA (100 μM) or kainate (100 μM) to a suspension of synaptosomes also led to free radical formation. The influence of glutamate receptor agonists was blocked by the specific antagonists MK-801 and NBQX. Thus, activation of NMDA and AMPA/kainate receptors can lead to oxidative stress in neuronal presynaptic endings.

Key words

synaptosomes free radicals reactive oxygen species glutamate NMDA kainate 

Abbreviations

AMPA

a-amino-3-hydroxy-5-methylisoxazole-4-propionic acid

DCFDA

2′,7′-dichlorofluorescein diacetate

NMDA

N-methyl-D-aspartate

ROS

reactive oxygen species

Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • A. V. Alekseenko
    • 1
  • V. A. Kolos
    • 1
  • T. V. Waseem
    • 1
  • S. V. Fedorovich
    • 1
  1. 1.Institute of Biophysics and Cell EngineeringNational Academy of Sciences of BelarusMinskBelarus

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