Discoidin domain receptor 1 mediates collagen-induced inflammatory activation of microglia in culture

Min Chul Seo, Sangseop Kim, Sang Hyun Kim, Tai Zheng Long, Kyun Park Eui, Won Ha Lee, Kyoungho Suk

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Discoidin domain receptor 1 (DDR1) is a nonintegrin collagen receptor tyrosine kinase with an extracellular domain homologous to discoidin 1 of a soil-living amoeba Dictyostelium discoideum. We have previously demonstrated that DDR1 mediates collagen-induced nitric oxide production in J774A.1 murine macrophages. Because collagen is one of the main components of extracellular matrix in the central nervous system, we hypothesized that collagen also induces inflammatory activation of brain microglia, and DDR1 may mediate collagen-induced microglial activation. Using BV-2 mouse microglial cells and mouse primary microglial cultures, we have demonstrated that (1) collagen induces inflammatory activation of microglia as evidenced by production of nitric oxide, expression of inducible nitric oxide synthase, COX-2, CD40, and matrix metalloproteinase-9; (2) DDR1 is expressed in microglia and is phosphorylated by collagen treatment; and (3) collagen-induced microglial activation is abrogated by DDR1 blockade but not by integrin neutralization. We have further shown that p38 MAPK, c-Jun N-terminal kinase, and nuclear factor-kappa B are involved in the collagen-DDR1-induced microglial activation. Our results suggest that collagen can induce inflammatory activation of brain microglia and that DDR1 mediates this effect of collagen in an integrin-independent manner.

Original languageEnglish
Pages (from-to)1087-1095
Number of pages9
JournalJournal of Neuroscience Research
Volume86
Issue number5
DOIs
StatePublished - Apr 2008

Keywords

  • Central nervous system
  • Collagen
  • DDR1
  • Extracellular matrix
  • Inflammation
  • Microglia

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