The role of an epithelial neutrophil-activating peptide-78-like protein in rat adjuvant-induced arthritis

Margaret M. Halloran, James M. Woods, Robert M. Strieter, Zoltan Szekanecz, Michael V. Volin, Shigeru Hosaka, G. Kenneth Haines, Steven L. Kunkel, Marie D. Burdick, Alfred Walz, Alisa E. Koch

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Abstract

The chemokine, epithelial neutrophil-activating peptide-78 (ENA-78), is a potent neutrophil chemotaxin whose expression is increased in inflamed synovial tissue and fluid in human rheumatoid arthritis compared with osteoarthritis. Since ENA-78 has been implicated in the pathogenesis of RA, we examined the expression of an ENA-78-like protein during the development of rat adjuvant-induced arthritis (AIA). Using an ELISA assay, we found increased levels of antigenic ENA-78-like protein in the sera of AIA animals compared with control normal animals by day 7 postadjuvant injection. ENA- 78-like protein levels continued to increase as AIA developed. ENA-78-like protein levels in joint homogenates were increased in AIA animals later in the development of the disease, by day 18 during maximal arthritis, compared with control animals. Expression of ENA-78-like protein in both the AIA serum and joint correlated with the progression of inflammation of the joints. Anti-human ENA-78 administered before disease onset modified the severity of AIA, while administration of anti-ENA-78 after clinical onset of AIA did not modify the disease. These data support a role for an ENA-78-like protein as an important chemokine in the progression and maintenance of AIA.

Original languageEnglish
Pages (from-to)7492-7500
Number of pages9
JournalJournal of Immunology
Volume162
Issue number12
Publication statusPublished - Jun 15 1999

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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    Halloran, M. M., Woods, J. M., Strieter, R. M., Szekanecz, Z., Volin, M. V., Hosaka, S., Haines, G. K., Kunkel, S. L., Burdick, M. D., Walz, A., & Koch, A. E. (1999). The role of an epithelial neutrophil-activating peptide-78-like protein in rat adjuvant-induced arthritis. Journal of Immunology, 162(12), 7492-7500.