Syndecan-2 cytoplasmic domain regulates colon cancer cell migration via interaction with syntenin-1

Hawon Lee, Yeonhee Kim, Youngsil Choi, Sojoong Choi, Eunkyung Hong, Eok Soo Oh

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

The cell surface heparan sulfate proteoglycan, syndecan-2, is crucial for the tumorigenic activity of colon cancer cells. However, the role played by the cytoplasmic domain of the protein remains unclear. Using colon cancer cells transfected with various syndecan-2-encoding genes with deletions in the cytoplasmic domain, it was shown that syndecan-2-induced migration activity requires the EFYA sequence of the C-terminal region; deletion of these residues abolished the rise in cell migration seen when the wild-type gene was transfected and syndecan-2 interaction with syntenin-1, suggesting that syntenin-1 functioned as a cytosolic signal effector downstream from syndecan-2. Colon cancer cells transfected with the syntenin-1 gene showed increased migratory activity, whereas migration was decreased in cells in which syntenin-1 was knock-down using small inhibitory RNA. In addition, syntenin-1 expression potentiated colon cancer cell migration induced by syndecan-2, and syndecan-2-mediated cell migration was reduced when syntenin-1 expression diminished. However, syntenin-1-mediated migration enhancement was not noted in colon cancer cells transfected with a gene encoding a syndecan-2 mutant lacking the cytoplasmic domain. Furthermore, in line with the increase in cell migration, syntenin-1 mediated Rac activation stimulated by syndecan-2. Together, the data suggest that the cytoplasmic domain of syndecan-2 regulates colon cancer cell migration via interaction with syntenin-1.

Original languageEnglish
Pages (from-to)148-153
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume409
Issue number1
DOIs
StatePublished - 27 May 2011

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2010-0026103 ).

Keywords

  • Cell migration
  • Colon cancer
  • Rac1
  • Syndecan-2
  • Syntenin-1

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