Gefitinib ('Iressa', ZD1839) inhibits the growth response of bladder tumour cell lines to epidermal growth factor and induces TIMP2

Br J Cancer. 2004 Apr 19;90(8):1679-85. doi: 10.1038/sj.bjc.6601768.


The effect of EGF stimulation and its inhibition with gefitinib ('Iressa', ZD1839), an epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor, has been investigated in two EGFR-positive human bladder tumour cell lines, RT112 and RT4. The growth of RT112 cells in a medium containing 10% foetal bovine serum was inhibited by 50% with 10 microM gefitinib, whereas this dose completely inhibited RT4 cell growth. Cells were more sensitive to growth inhibition in the serum-free medium. Increased growth of cells in the serum-free medium was observed with 10 or 50 ng x ml(-1) EGF and the proliferative effect of EGF stimulation in both cell lines was inhibited in the presence of 1 microM, but not 0.1 microM gefitinib. Zymography of the conditioned medium from RT112 cells treated with EGF and gefitinib showed a decrease in matrix metalloproteinase 2 (MMP2) concentrations. Western blot analysis showed that tissue inhibitor of metalloproteinase 1(TIMP1) increased in the conditioned medium from RT112 cells treated with EGF, and this was partially inhibited with both 1 and 5 microM gefitinib. Conversely, TIMP2 decreased with EGF stimulation and this was reversed with gefitinib. Tissue inhibitor of metalloproteinase 1 had no effect on the growth of either cell line. These studies show alterations in the balance of MMPs and their inhibitors in EGF-stimulated bladder tumour cells, which are reversed by gefitinib, suggesting gefitinib should be investigated for its effect on human bladder tumours.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents / pharmacology*
  • Epidermal Growth Factor / pharmacology*
  • ErbB Receptors / drug effects*
  • ErbB Receptors / physiology*
  • Gefitinib
  • Humans
  • Protease Inhibitors / analysis*
  • Quinazolines / pharmacology*
  • Tissue Inhibitor of Metalloproteinase-2 / biosynthesis*
  • Tumor Cells, Cultured
  • Urinary Bladder Neoplasms / pathology*


  • Antineoplastic Agents
  • Protease Inhibitors
  • Quinazolines
  • Tissue Inhibitor of Metalloproteinase-2
  • Epidermal Growth Factor
  • ErbB Receptors
  • Gefitinib