Protection of myelin basic protein immunized mice from free-radical mediated inflammatory cell invasion of the central nervous system by the natural peroxynitrite scavenger uric acid

Sergei V. Spitsin, Gwen S. Scott, Rhonda B. Kean, Tatiana Mikheeva, D. Craig Hooper

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Peroxynitrite (ONOO-), the product of nitric oxide (NO(.)) and superoxide (O2(-.)), is believed to be a major contributor to immunotoxicity when produced by activated cells expressing inducible nitric oxide synthase (iNOS). Uric acid (UA) is a natural scavenger of ONOO- that is present at high levels in the sera of humans and other higher order primates relative to most lower mammals. We have previously shown that UA treatment is therapeutic in experimental allergic encephalomyelitis (EAE), a rodent model of multiple sclerosis (MS). In this study we have examined the effect of UA therapy on the dynamics of the appearance of iNOS-positive cells in central nervous system (CNS) tissue of mice subjected to the stimuli that cause EAE. The results indicate that UA prevents activated monocytes from entering CNS tissue where they may contribute to the pathogenesis of MS and other CNS diseases. Copyright (C) 2000 Elsevier Science Ireland Ltd.

Original languageEnglish
Pages (from-to)137-141
Number of pages5
JournalNeuroscience Letters
Volume292
Issue number2
DOIs
StatePublished - 6 Oct 2000
Externally publishedYes

Keywords

  • Autoimmunity
  • Blood-brain barrier
  • Demyelinating diseases
  • Encephalomyelitis
  • Multiple sclerosis
  • Nitric oxide
  • Peroxynitrite
  • Uric acid

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