Netrin-1 regulates invasion and migration of mouse mammary epithelial cells overexpressing Cripto-1 in vitro and in vivo

Luigi Strizzi, Caterina Bianco, Ahmed Raafat, Wissam Abdallah, Cindy Chang, Dina Raafat, Morihisa Hirota, Shin Hamada, Youping Sun, Nicola Normanno, Robert Callahan, Lindsay Hinck, David Salomon

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

The neuronal guidance molecule, Netrin-1, has been suggested to play a role in the adhesion and migration of the mammary gland epithelium. Human and mouse Cripto-1 induce proliferation, migration, invasion and colony formation by epithelial cells in 3D matrices. Here we investigate whether Netrin-1 affects these Cripto-1-dependent activities in mouse mammary epithelial cells. Overexpression of Cripto-1 in EpH4 and HC-11 cells (EpH4/Cripto-1 or HC-11/Cripto-1) was associated with low expression of Netrin-1 and increased expression of its receptor Neogenin compared to that of wild-type cells. No change was observed in the expression of the other Netrin-1 receptor, UNC5H1. Treating EpH4/Cripto-1 or HC-11/Cripto-1 mammary cells with exogenous soluble Netrin-1 resulted in increased expression of E-cadherin and UNC5H1, decreased expression of vimentin and decreased activation of Akt as determined by western blotting. Colony formation by Eph4/Cripto-1 cells in 3D gels was signilicantly reduced in proximity to a Netrin-1 source, and mammary glands of transgenic mice overexpressing human Cripto-1 showed altered ductal growth in proximity to implanted Netrin-1-releasing pellets. Terminal end buds in the treated transgenic mice mammary glands also showed increased expression of E-cadherin and UNC5H1 and decreased expression of active Akt determined by immunohistochemistry. Together, these results suggest that regulation of Netrin-1 expression is important in regulating Cripto-1-dependent invasion and migration of mammary epithelial cells.

Original languageEnglish
Pages (from-to)4633-4643
Number of pages11
JournalJournal of cell science
Volume118
Issue number20
DOIs
Publication statusPublished - 2005 Oct 15

Keywords

  • Cripto-1
  • Invasion
  • Mammary cells
  • Migration
  • Netrin-1

ASJC Scopus subject areas

  • Cell Biology

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