Inhibition of angiogenesis and HGF-cMET-elicited malignant processes in human hepatocellular carcinoma cells using adenoviral vector-mediated NK4 gene therapy

• Published in: Cancer gene therapy Vol. 12; no. 12; pp. 954 - 962
• Main Authors: Heideman, Daniëlle A M, Overmeer, Renée M, van Beusechem, Victor W, Lamers, Wouter H, Hakvoort, Theodorus B M, Snijders, Peter J F, Craanen, Mikael E, Offerhaus, G Johan A, Meijer, Chris J L M, Gerritsen, Winald R
• Format: Journal Article
• Language: English
• Published: England Nature Publishing Group 01.12.2005
• Subjects: Adenoviridae - genetics; Adenoviruses; Angiogenesis; Angiogenesis inhibitors; Animals; Antitumor activity; Carcinogenesis; Carcinoma, Hepatocellular - blood supply; Carcinoma, Hepatocellular - genetics; Carcinoma, Hepatocellular - metabolism; Carcinoma, Hepatocellular - pathology; Care and treatment; Cell migration; Cell Movement; Cell Proliferation; Cells, Cultured; Endothelial cells; Endothelial Cells - metabolism; Gene therapy; Gene Transfer Techniques; Genetic aspects; Genetic Therapy; Genetic Vectors - genetics; Health aspects; Hepatocellular carcinoma; Hepatocyte growth factor; Hepatocyte Growth Factor - genetics; Hepatocyte Growth Factor - metabolism; Hepatoma; Humans; Kinases; Liver cancer; Metastases; Mice; Mice, Nude; NK4 protein; Proto-Oncogene Proteins c-met - antagonists & inhibitors; Proto-Oncogene Proteins c-met - metabolism; Signal transduction; Tumor cells; Xenograft Model Antitumor Assays; Xenografts; Netherlands
• ISSN: 0929-1903; 1476-5500
• DOI: 10.1038/sj.cgt.7700856

NK4 is an hepatocyte growth factor (HGF)-antagonist and a broad angiogenesis inhibitor. NK4 gene therapy has confirmed antitumor efficacy on cancers with intact HGF-cMET signaling pathway. However, the feasibility to treat tumors in which the effect of the HGF-cMET signaling pathway is less unambiguous or may even be inhibitory on carcinogenesis, such as hepatocellular carcinoma (HCC) with NK4 needs further assessment. Therefore, we evaluated the effects of adenoviral vector-mediated expression of NK4 on the biological behavior of a series of HCC cell lines in vitro and on HepG2 xenografts in vivo. In vitro, transduction of HCC cell lines with the replication-deficient recombinant adenoviral vector AdCMV.NK4 resulted in significant inhibition of proliferation over and above the antimitogenic effects of HGF. In addition, HGF-induced scattering and invasion through matrigel were inhibited effectively. Moreover, transduced HCC cells produced sufficient amounts of NK4 protein to achieve bystander effects involving reduced migration of nontransduced tumor cells and reduced proliferation of endothelial cells. Finally, treatment of established HepG2 xenografts with AdCMV.NK4 resulted in significant tumor growth delay and significant reduction of intratumoral microvessel density. In conclusion, NK4 gene therapy is a promising strategy to treat HCC based on the pleiotropic functions of NK4 interfering with tumor growth, invasion, metastasis and angiogenesis.