Angiopoietins in malignancy

Eur J Surg Oncol. 2007 Feb;33(1):7-15. doi: 10.1016/j.ejso.2006.07.015. Epub 2006 Sep 7.


Background: Tumour growth is dependant upon the development of an adequate blood supply. This, in turn, is thought to depend upon a switch by the tumour, from a dormant to angiogenic state. Recent data suggest that this switch may occur when the balance of pro- and anti-angiogenic agents alters to promote angiogenesis. Angiopoietins may be involved in this balance.

Methods: An electronic literature search was performed with respect to angiopoietins from 1996 to the present. Published data from in-vitro and in-vivo studies were critically analysed. A specific focus was made of studies relating to tumour growth and vasculature.

Results: Since angiopoietin-1 was first described in 1996, three more angiopoietins have been described. All family members bind to the Tie-2 receptor. There is now a considerable accumulation of data that suggests they play a pivotal role in the development and stabilisation of tumour vasculature. angiopoietin-2 appears to be pro-angiogenic whilst angiopoietin-1 appears to be a stabilising factor.

Conclusions: Recent trials of anti-angiogenic agents show promise in the treatment of solid human cancers. The angiopoietins are a new family of proteins that appear to be influential in the development of the tumour vasculature. Manipulation of the angiopoietin balance may provide a potential therapeutic target in human cancer.

Publication types

  • Review

MeSH terms

  • Angiopoietins / metabolism*
  • Animals
  • Biomarkers, Tumor / metabolism*
  • Disease Progression
  • Humans
  • Neoplasms / blood supply
  • Neoplasms / metabolism*
  • Neovascularization, Pathologic / metabolism
  • Neovascularization, Pathologic / pathology
  • Prognosis


  • Angiopoietins
  • Biomarkers, Tumor