Breast Cancer Research and Treatment

, Volume 80, Issue 2, pp 221–232 | Cite as

Inhibition of Invasion and Metastasis by Glypican-3 in a Syngeneic Breast Cancer Model

  • M.G. Peters
  • E. Farías
  • L. Colombo
  • J. Filmus
  • L. Puricelli
  • E. Bal de Kier Joffé


Glypican-3 (GPC3), a proteoglycan bound to the cell membrane through a GPI anchor, is widely expressed in the embryo but down regulated in most adult tissues, with some exceptions as mammary cells. GPC3 is involved in the regulation of cell proliferation and survival in specific cell types. LM3, a murine mammary tumor cell line unable to express GPC3, was stably transfected with the rat GPC3 gene to analyze its role in tumor progression. Upon injection into syngeneic BALB/c mice LM3-GPC3 clones showed less local invasiveness and developed fewer spontaneous and experimental lung metastasis than controls. GPC3-expressing cells were more sensitive to apoptosis induced by serum depletion, exhibited a delay in the first steps of spreading and were less motile than controls. On the other hand, LM3-GPC3 cells were significantly more adherent to FN than control ones. We observed that GPC3 transfectants presented a higher expression of E-cadherin and β-catenin, molecules whose down regulation has been associated with tumor progression. Exogenous TGF-β increased MMP-9 activity in both control and GPC3-expressing cells, but did not modulate MMP-2. Contrarily, GPC3 expression prevented the increase of MMP-2 activity induced by IGF-II. Our results suggest that GPC3 has a protective role against mammary cancer progression.

breast cancer glypican-3 invasion metastasis tumor progression 


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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • M.G. Peters
    • 1
  • E. Farías
    • 1
  • L. Colombo
    • 1
  • J. Filmus
    • 2
  • L. Puricelli
    • 1
  • E. Bal de Kier Joffé
    • 1
  1. 1.Research Area, Cell Biology Department, Institute of Oncology “Angel H. Roffo”University of Buenos AiresBuenos AiresArgentina
  2. 2.Molecular and Cellular Biology Research, Sunnybrook and Women's College Health Science Center, Department of Medical BiophysicsUniversity of TorontoTorontoCanada

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