Down-regulation of MiR-206 promotes proliferation and invasion of laryngeal cancer by regulating VEGF expression

Anticancer Res. 2011 Nov;31(11):3859-63.

Abstract

MicroRNAs (miRNA) are a class of small noncoding RNAs that regulate the expression of their target genes. The aim of the present study was to explore the effects of miR-206 on laryngeal suamous cell carcinoma (LSCC) cells. The expression level of miR-206 was quantified by qRT-PCR in primary LSCC tissues and corresponding adjacent non-neoplastic tissues. MTT, Matrigel invasion assays and flow cytometry methods were used to test the proliferation, invasion and apoptosis of MiR-206 transfection LSCC cells and a mouse model was used to investigate tumorigenesis. MiR-206 was significantly down regulated in the LSCC tissues. Inverse correlation of miR-206 expression was found with the T grade, nodal metastasis and clinical stage of LSCC. Cell proliferation, migration, invasion and tumorigenesis in the LSCC cells were significantly inhibited and apoptotic cells were also increased after miR-206 tansfection. Furthermore, miR-206 transfection down-regulated the expression of vascular endothelial growth factor (VEGF) in the LSCC cells. The loss of miR-206 may play an important role in the progress of LSCC and miR-206 may function as a novel tumor suppressed miRNA.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Apoptosis
  • Blotting, Western
  • Carcinoma, Squamous Cell / genetics
  • Carcinoma, Squamous Cell / metabolism
  • Carcinoma, Squamous Cell / pathology*
  • Cell Adhesion
  • Cell Line, Tumor
  • Cell Movement
  • Cell Proliferation*
  • Down-Regulation
  • Female
  • Flow Cytometry
  • Gene Expression Regulation, Neoplastic*
  • Humans
  • Immunoenzyme Techniques
  • Laryngeal Neoplasms / genetics
  • Laryngeal Neoplasms / metabolism
  • Laryngeal Neoplasms / pathology*
  • Lymphatic Metastasis
  • Male
  • Mice
  • Mice, Inbred BALB C
  • MicroRNAs / physiology*
  • Middle Aged
  • Neoplasm Invasiveness
  • RNA, Messenger / genetics
  • Real-Time Polymerase Chain Reaction
  • Vascular Endothelial Growth Factor A / antagonists & inhibitors*
  • Vascular Endothelial Growth Factor A / genetics
  • Vascular Endothelial Growth Factor A / metabolism

Substances

  • MicroRNAs
  • Mirn206 microRNA, mouse
  • RNA, Messenger
  • Vascular Endothelial Growth Factor A
  • vascular endothelial growth factor A, mouse