Cytokine-induced enhancement of calcium-dependent glutamate release from astrocytes mediated by nitric oxide

Tomoaki Ida, Masayuki Hara, Yoichi Nakamura, Shunji Kozaki, Shigeru Tsunoda, Hideshi Ihara

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)

Abstract

Cytokines are produced in the central nervous system (CNS) and exhibit various effects on neurons, microglia, and astrocytes. Astrocytes can release chemical transmitters, including glutamate, in a calcium-dependent manner, which may mediate communication between neurons and astrocytes. To date, no studies have been conducted on the effects of cytokines on calcium-dependent glutamate release from astrocytes. Here, we studied the effects of cytokines on calcium-dependent glutamate release. Cytokines enhanced glutamate release and induced the expression of inducible nitric oxide synthase (iNOS) and the production of nitric oxide (NO). The inhibition of iNOS eliminated the cytokine-induced enhancement of glutamate release, and treatment with a NO donor, even in the absence of cytokines, increased glutamate release. Thus, cytokines enhance glutamate release, and this enhancement is mediated by NO.

Original languageEnglish
Pages (from-to)232-236
Number of pages5
JournalNeuroscience Letters
Volume432
Issue number3
DOIs
Publication statusPublished - 2008 Feb 27
Externally publishedYes

Keywords

  • Astrocytes
  • Cytokines
  • Glutamate release
  • Nitric oxide

ASJC Scopus subject areas

  • Neuroscience(all)

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