c-Met-targeted RNA interference inhibits growth and metastasis of glioma U251 cells in vitro

J Neurooncol. 2009 Jun;93(2):183-9. doi: 10.1007/s11060-008-9772-5. Epub 2009 Jan 24.

Abstract

Angiogenesis plays an essential role in tumor growth and metastasis and is a promising target for cancer therapy. c-Met, a receptor tyrosine kinase, and its ligand, hepatocyte growth factor (HGF), are critical in cellular proliferation, motility, invasion, and angiogenesis. The present study was designed to determine the role of c-Met in growth and metastasis of glioma U251 cells using RNA interference (RNAi) technology in vitro. We constructed three kinds of shRNA expression vectors aiming at the c-Met gene, then transfected them into glioma U251 cells by lipofectamine(TM) 2000. The level of c-Met mRNA was investigated by real-time polymerse chain reaction (RT-PCR). The protein expression of c-Met was observed by immunofluoresence staining and western blotting. U251 cell growth and adherence was detected by methyl thiazole tetrazolium assay. The apoptosis of U251 cells was examined with a flow cytometer. The adherence, invasion, and in vitro angiogenesis assays of U251 cells were done. We got three kinds of c-Met specific shRNA expression vectors which could efficiently inhibit the growth and metastasis of U251 cells and the expression of c-Met in U251 cells. RT-PCR, immunofluoresence staining and western blotting showed that inhibition rate for c-Met expression was up to 90%, 79% and 85%, respectively. The expression of c-Met can be inhibited by RNA interference in U251 cells, which can inhibit the growth and metastasis of U251 cell and induce cell apoptosis. These results indicate that RNAi of c-Met can be an effective antiangiogenic strategy for glioma.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Apoptosis
  • Cell Adhesion
  • Cell Division / genetics
  • Cell Line, Tumor
  • DNA Primers
  • Flow Cytometry
  • Gene Amplification
  • Glioma / genetics*
  • Glioma / pathology
  • Humans
  • Neoplasm Metastasis / genetics
  • Neoplasm Metastasis / prevention & control
  • Neovascularization, Pathologic / genetics
  • RNA Interference
  • RNA, Messenger / genetics
  • RNA, Neoplasm / genetics
  • RNA, Small Interfering / genetics*
  • Receptor Protein-Tyrosine Kinases / genetics*
  • Reverse Transcriptase Polymerase Chain Reaction
  • Transfection

Substances

  • DNA Primers
  • RNA, Messenger
  • RNA, Neoplasm
  • RNA, Small Interfering
  • RON protein
  • Receptor Protein-Tyrosine Kinases