Animal cells and systems

The Korean Society for Integrative Biology (한국통합생물학회)
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Effects of Taurine on Glutamate-induced Neurotoxicity and Interleukin-6 mRNA Expression in Astrocytes

  • Yang, Seong-Chil (Department of Biology, College of Naturla Science. Inha University) ;
  • Baek, Su-Yeon (Department of Biology, College of Naturla Science. Inha University) ;
  • Choe, In-Pyo (Korea Research Institute of Bioscience & Biotechnology) ;
  • Lee, Chang-Jung (Department of Biology, College of Naturla Science. Inha University)
  • Published : 1997.09.01
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Abstract

Taurine (2-aminoethanesulfonic acid), one of bioactive amino acid in the mammalian brain, is known to exert inhibitory effects on neurons via GABA receptor. In the present study, we examined effects of taurine on glutamateinduced neurotoxicity on hippocampal neuron cell culture using cell counting method and lactate dehydrogenase (LDH) assay. After 10 d of culture, cells were stimulated with appropriate drugs. Only 43% of cultured neuronal cells survived at one day after stimulation with 500 uM L-glutamate for 10 min. Survival rate was enhanced by 82% in the presence of 10 mM taurine. LDH activity from the culture supernatant incubated with a combination of L-glutamate and taurine was less than half of that with L-glutamate alone. In the next series of experiments, interleukin-6 (IL-6) mRNA expression in cultured astrocytes was investigated using reverse tanscription-PCR (RT-PCR). IL-6 mRNA was detected in the astrocytes stimulated with L-glutamate in a dose-dependent manner, while not detected in the unstimulated control astrocytes. The expression of IL-6 mRNA caused by 10 mM glutamate was inhibited by taurine, but not by GABA. These findings demonstrated a neuroprotective action of taurine against glutamate-induced toxicity.

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References

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