Pro-inflammatory cytokine-induced matrix metalloproteinase-1 (mmp-1) secretion in human pancreatic periacinar myofibroblasts

Kazuhito Tasaki, Yutaka Shintani, Takao Saotome, Akira Andoh, Yoshihide Fujiyama, Shigenari Hozawa, Tadao Bamba

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Matrix metalloproteinases (MMPs) are the proteases involved in the degradation of the extracellular matrix. MMP-1 is thought to be one of the key enzymes in fibrolysis, a process closely related to tissue remodeling. In the present study, we investigated MMP-1 secretion from human pancreatic periacinar myofibroblasts in response to pro-inflammatory cytokines IL-1βand TNF-α. We also attempted to clarify the intracellular signaling pathways mediating the cytokine-induced MMP-1 secretion. MMP-1 secretion was measured by an enzyme-linked immunosorbent assay. MMP-1 molecules were analyzed by Western blotting. MMP-1 mRNA expression was evaluated by Northern blotting. IL-1β and TNF-α stimulated the MMP-1 secretion in a dose- and time-dependent manner. Ninety percent of MMP-1 was secreted as inactive form (pro-MMP-1). The effects of IL-1β and TNF-αwere significantly inhibited by PD98059 MEK/ ERK inhibitor). In contrast, SB203580 (p38 MAPK inhibitor), GF109203X (PKC inhibitor), and PDTC (NF-κB inhibitor) did not alter the MMP-1 secretion induced by IL-1β and TNF-α. These effects were also observed at the mRNA level. In conclusion, in human pancreatic periaci-nar myofibroblasts, MMP-1 secretion was regulated by the pro-inflammatory cytokines via the MEK/ERK cascade. Thus, human pancreatic periacinar myofibroblasts may play an important role in the remodeling of damaged pancreatic tissue in chronic pancreatitis via MMP-1 secretion.

Original languageEnglish
Pages (from-to)414-421
Number of pages8
Issue number5
Publication statusPublished - 2003
Externally publishedYes


  • Interleukin-1β
  • MEK
  • Matrix metalloproteinases
  • Mitogen-activated protein kinase
  • Tumor necrosis factor-α

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Hepatology
  • Gastroenterology


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