Myocyte production of nitric oxide in response to AChR-reactive antibodies in two inbred rat strains may influence disease outcome in experimental myasthenia gravis

Yvonne R. Garcia, Jennifer C. Pothitakis, Keith A. Krolick

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

In an attempt to identify mechanisms that explain the difference in susceptibility of two rat strains to the induction of experimental autoimmune myasthenia gravis (EAMG), acetylcholine receptor (AChR)-reactive antibodies were tested for their ability to up-regulate levels of inducible nitric oxide synthase (iNOS) in skeletal muscles of disease-sensitive Lewis rats and disease-resistant Wistar Furth (WF) rats. Initially, the WF muscle cell line, WE1, appeared to be more sensitive to antibody-stimulated iNOS induction and NO production than did the Lewis muscle cell line, LE1. Next, AChR-reactive antibody induced widespread iNOS production in skeletal muscles of WF rats, while iNOS production in muscles of Lewis rats was much less pronounced. Finally, inhibition of iNOS activity by administration of a specific iNOS inhibitor resulted in increased susceptibility to the induction of impaired muscle function in EAMG-resistant WF rats. It is speculated that nitric oxide production plays a protective immunomodulating role in WF rats.

Original languageEnglish (US)
Pages (from-to)116-126
Number of pages11
JournalClinical Immunology
Volume106
Issue number2
DOIs
StatePublished - Feb 1 2003

Keywords

  • Acetylcholine receptor antibody
  • Autoimmune disease
  • L-NIL
  • Muscle
  • Myasthenia gravis
  • Nitric oxide
  • Nitric oxide synthase
  • iNOS

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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