Physiology and pathophysiology of proteinase-activated receptors (PARs): PAR-2-mediated proliferation of colon cancer cell

Masahiro Nishibori, Shuji Mori, Hideo K. Takahashi

Research output: Contribution to journalShort survey

28 Citations (Scopus)

Abstract

Proteinase-activated receptor-2 (PAR-2) has been demonstrated to be highly expressed in the gastrointestinal tract. In the present minireview, we summarize the effects of PAR-1 and PAR-2 stimulation using their activating peptides and agonist proteinases on the calcium signaling and the cell proliferation in DLD-1 cell, a human colon cancer cell line. PAR-2 but not PAR-1 stimulation induced the enhancement of cell proliferation, whereas both PAR-1 and PAR-2 stimulation induced the transient increase in [Ca2+]1. PAR-2 stimulation induced the phosphorylation of MEK1/2 and ERK1/2, but PAR-1 stimulation did not. The inhibition of MEK1/2 by PD98059 completely abolished the proliferative response to PAR-2 stimulation. Thus, MEK-ERK activation plays major role in the PAR-2-mediated proliferative response. The coupling of PARs to calcium signaling and MEK-ERK activation may be independent, and varied dependent on cell types.

Original languageEnglish
Pages (from-to)25-30
Number of pages6
JournalJournal of Pharmacological Sciences
Volume97
Issue number1
DOIs
Publication statusPublished - Jan 1 2005

Keywords

  • Colon cancer
  • Mitogen-activated protein kinase
  • Proliferation
  • Proteinase-activated receptor

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology

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