The role of the insulin-like growth factor system in colorectal cancer: review of current knowledge

  • Rajaraman Durai
  • Wenxuan Yang
  • Sharmila Gupta
  • Alexander M. Seifalian
  • Marc C. Winslet



The insulin-like growth factor system, which includes insulin-like growth factors (IGF-I and IGF-II), IGF receptors (IGF-IR and IGF-IIR) and IGF binding proteins (IGFBPs), plays an important role in epithelial growth, anti-apoptosis and mitogenesis. There is a growing body of evidence showing that IGFs control growth and proliferation of several types of cancer. This review introduces the latest information on the biology of the IGF system and its pathophysiological role in the development of colorectal cancer.


The growth promoting effects of IGF-I and IGF-II on cancer cells are mediated through the IGF-IR, which is a tyrosine kinase and cancer cells with a strong tendency to metastasise have a higher expression of the IGF-IR. Most of the IGFs in circulation are bound to the IGFBPs, which regulate the bioavailability of the IGFs. All IGFBPs inhibit IGF action by high affinity binding, while some of them also potentiate the effects of IGFs. Colon cancer cells produce specific proteases that degrade the IGFBP so that the IGF will be free to act on the cancer cell in an autocrine manner. Therefore, the IGFBPs play a crucial role in the development of the cancer.


The current knowledge about the link between IGFs and colon cancer is mainly based on in vitro investigations. Further in vivo study is needed to understand the exact role of the IGF system, especially its binding proteins, so that they can be manipulated for the prevention and treatment of colorectal cancer.


Insulin-like growth factors Insulin-like growth factor binding proteins Colorectal cancer 


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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Rajaraman Durai
    • 1
  • Wenxuan Yang
    • 1
  • Sharmila Gupta
    • 2
  • Alexander M. Seifalian
    • 1
  • Marc C. Winslet
    • 1
    • 2
  1. 1.University Department of Surgery, Royal Free and University College Medical SchoolUniversity College LondonLondonUK
  2. 2.Royal Free Hampstead NHS Trust HospitalLondonUK

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