Netrin-1 promotes glioblastoma cell invasiveness and angiogenesis by multiple pathways including activation of RhoA, cathepsin B, and cAMP-response element-binding protein

J Biol Chem. 2013 Jan 25;288(4):2210-22. doi: 10.1074/jbc.M112.397398. Epub 2012 Nov 29.


Glioblastomas are very difficult tumors to treat because they are highly invasive and disseminate within the normal brain, resulting in newly growing tumors. We have identified netrin-1 as a molecule that promotes glioblastoma invasiveness. As evidence, netrin-1 stimulates glioblastoma cell invasion directly through Matrigel-coated transwells, promotes tumor cell sprouting and enhances metastasis to lymph nodes in vivo. Furthermore, netrin-1 regulates angiogenesis as shown in specific angiogenesis assays such as enhanced capillary endothelial cells (EC) sprouting and by increased EC infiltration into Matrigel plugs in vivo, as does VEGF-A. This netrin-1 signaling pathway in glioblastoma cells includes activation of RhoA and cyclic AMP response element-binding protein (CREB). A novel finding is that netrin-1-induced glioblastoma invasiveness and angiogenesis are mediated by activated cathepsin B (CatB), a cysteine protease that translocates to the cell surface as an active enzyme and co-localizes with cell surface annexin A2 (ANXA2). The specific CatB inhibitor CA-074Me inhibits netrin-1-induced cell invasion, sprouting, and Matrigel plug angiogenesis. Silencing of CREB suppresses netrin-1-induced glioblastoma cell invasion, sprouting, and CatB expression. It is concluded that netrin-1 plays an important dual role in glioblastoma progression by promoting both glioblastoma cell invasiveness and angiogenesis in a RhoA-, CREB-, and CatB-dependent manner. Targeting netrin-1 pathways may be a promising strategy for brain cancer therapy.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Actins / metabolism
  • Animals
  • Annexin A2 / metabolism
  • Cathepsin B / metabolism*
  • Cell Line, Tumor
  • Cell Membrane / metabolism
  • Cell Movement
  • Collagen / chemistry
  • Cyclic AMP / metabolism*
  • Cyclic AMP Response Element-Binding Protein / metabolism*
  • Drug Combinations
  • Female
  • Gene Expression Regulation, Neoplastic*
  • Gene Silencing
  • Glioblastoma / metabolism*
  • HEK293 Cells
  • Human Umbilical Vein Endothelial Cells / metabolism
  • Humans
  • Laminin / chemistry
  • Mice
  • Mice, Inbred C57BL
  • Mice, Nude
  • Models, Biological
  • Neoplasm Invasiveness
  • Neovascularization, Pathologic*
  • Nerve Growth Factors / metabolism*
  • Netrin-1
  • Protein Binding
  • Proteoglycans / chemistry
  • Recombinant Proteins / metabolism
  • Tumor Suppressor Proteins / metabolism*
  • rhoA GTP-Binding Protein / metabolism*


  • Actins
  • Annexin A2
  • Cyclic AMP Response Element-Binding Protein
  • Drug Combinations
  • Laminin
  • NTN1 protein, human
  • Nerve Growth Factors
  • Ntn1 protein, mouse
  • Proteoglycans
  • Recombinant Proteins
  • Tumor Suppressor Proteins
  • matrigel
  • RHOA protein, human
  • Netrin-1
  • Collagen
  • Cyclic AMP
  • Cathepsin B
  • rhoA GTP-Binding Protein