International Journal of Pancreatology

, Volume 18, Issue 1, pp 15–23 | Cite as

Frequent expression of genes for receptor tyrosine kinases and their ligands in human pancreatic cancer cells

  • Tetsuro Oikawa
  • Jiro Hitomi
  • Akira Kono
  • Eizo Kaneko
  • Ken Yamaguchi


Limited information is available concerning the involvement of growth factor receptors and their ligands in the pathogenesis of human pancreatic cancer. We analyzed 12 human pancreatic cancer cell lines by Northern blot analysis for the expression of 9 receptor tyrosine kinases (RTKs) and 6 growth factors. The effect of a monoclonal antibody (MAb) against transforming growth factor-α (TGF-α) on in vitro pancreatic cancer cell growth was also assessed. mRNA for EGF-R, c-erbB-2 and c-erbB-3 was expressed in 12 (100%), 12 (100%), and 7 (58%), respectively, of the cell lines examined. In addition, 8 (67%) cell lines expressed the c-met/receptor for hepatocyte growth factor. As for ligands, TGF-α mRNA was detected in 10 (83%) cell lines; MAb against TGF-α inhibited growth of the 2 cell lines examined. Furthermore, mRNA for amphiregulin (AR) was expressed in 10 (83%) cell lines. Coexpression of TGF-α, AR, and EGF-R was observed in 9 (75%) cell lines. These results support the concept that several specified types of RTKs and their ligands are closely involved in regulation of the growth of human pancreatic cancer cells.

Key Words

Pancreatic cancer receptor tyrosine kinase autocrine growth factor transforming growth factor-α amphiregulin hepatocyte growth factor 


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Copyright information

© Humana Press Inc 1995

Authors and Affiliations

  • Tetsuro Oikawa
    • 3
  • Jiro Hitomi
    • 3
  • Akira Kono
    • 1
  • Eizo Kaneko
    • 2
  • Ken Yamaguchi
    • 3
  1. 1.Chemotherapy Division of Research InstituteNational Kyushu Cancer CenterFukuokaJapan
  2. 2.First Department of Internal MedicineHamamatsu University School of MedicineShizuokaJapan
  3. 3.Growth Factor DivisionNational Cancer Center Research InstituteTokyoJapan

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