Overexpression and activation of hepatocyte growth factor/scatter factor in human non-small-cell lung carcinomas

M. Olivero, M. Rizzo, R. Madeddu, C. Casadio, S. Pennacchietti, M. R. Nicotra, M. Prat, G. Maggi, N. Arena, P. G. Natali, P. M. Comoglio, M. F. Di Renzo

Research output: Contribution to journalArticlepeer-review

Abstract

Hepatocyte growth factor/scatter factor (HGF/SF) stimulates the invasive growth of epithelial cells via the c-MET oncogene-encoded receptor. In normal lung, both the receptor and the ligand are detected, and the latter is known to be a mitogenic and a motogenic factor for both cultured bronchial epithelial cells and non-small-cell carcinoma lines. Here, ligand and receptor expression was examined in 42 samples of primary human non-small-cell lung carcinoma of different histotype. Each carcinoma sample was compared with adjacent normal lung tissue. The Met/HGF receptor was found to be 2 to 10-fold increased in 25% of carcinoma samples (P = 0.0113). The ligand, HGF/SF, was found to be 10 to 100-fold overexpressed in carcinoma samples (P <0.0001). Notably, while HGF/SF was occasionally detectable and found exclusively as a single-chain inactive precursor in normal tissues, it was constantly in the biologically-active heterodimeric form in carcinomas. Immunohistochemical staining showed homogeneous expression of both the receptor and the ligand in carcinoma samples, whereas staining was barely delectable in their normal counterparts. These data show that HGF/SF is overexpressed and consistently activated in non-small-cell lung carcinomas and may contribute to the invasive growth of lung cancer.

Original languageEnglish
Pages (from-to)1862-1868
Number of pages7
JournalBritish Journal of Cancer
Volume74
Issue number12
Publication statusPublished - 1996

Keywords

  • Hepatocyte growth factor/scatter factor
  • Human cancer
  • Met receptor
  • Non-small-cell lung cancer

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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