Expression profiles of matrix metalloproteinase 9 in teleost fish provide evidence for its active role in initiation and resolution of inflammation

M.K. Chadzinska, P. Baginski, E. Kolaczkowska, H.F.J. Savelkoul, B.M.L. Verburg-van Kemenade

Research output: Contribution to journalArticleAcademicpeer-review

48 Citations (Scopus)

Abstract

Matrix metalloproteinase 9 (MMP-9) belongs to a family of zinc-dependent endopeptidases. As a consequence of its ability to cleave structural extracellular matrix molecules, mammalian MMP-9 is associated with vital inflammatory processes such as leucocyte migration and tissue remodelling and regeneration. Interestingly, MMP-9 genes have been identified in fish, but functional data are still limited and focus on the involvement of MMP-9 in embryonic development, reproduction and post-mortem tenderization. Here, we describe the involvement of MMP-9 in the innate immunity of carp. In carp, MMP-9 was most notably expressed in classical fish immune organs and in peritoneal and peripheral blood leucocytes, indicating a role of MMP-9 in immune responses. In our well-characterized zymosan-induced peritonitis model for carp, we analysed expression of the MMP-9 gene and the gelatinolytic levels of both pro- and activated forms of MMP-9. The biphasic profile of MMP-9 mRNA expression indicated involvement during the initial phase of inflammation and during the later phase of tissue remodelling. Also, in vitro stimulation of carp phagocytes with lipopolysaccharide or concanavalin A increased MMP-9 gene expression, with a peak at 24¿hr. The increase of MMP-9 mRNA correlated with the peak of MMP-9 gelatinolytic level in culture supernatants. These results provide evidence for an evolutionarily conserved and relevant role of MMP-9 in the innate immune response.
Original languageEnglish
Pages (from-to)601-610
JournalImmunology
Volume125
Issue number4
DOIs
Publication statusPublished - 2008

Keywords

  • matrix-metalloproteinase inhibitors
  • induced peritoneal inflammation
  • neutrophil gelatinase b
  • cyprinus-carpio l.
  • cod gadus-morhua
  • gelatinolytic activities
  • mast-cells
  • zymosan peritonitis
  • lymphoid organs
  • spawning stage

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