Reduced Expression of RanBPM Is Associated with Poorer Survival from Lung Cancer and Increased Proliferation and Invasion of Lung Cancer Cells In Vitro

Anticancer Res. 2017 Aug;37(8):4389-4397. doi: 10.21873/anticanres.11833.

Abstract

Background/aim: Ran binding protein microtubule-organizing centre (RanBPM), also known as RanBP9, is a scaffold protein conserved through evolution. We investigated the role of RanBPM in human lung cancer.

Materials and methods: Transcripts of RanBPM were determined in 56 human lung cancers along with paired normal lung tissues using real-time PCR. Association with prognosis was analyzed by online Kaplan-Meier survival analysis. In vitro lung cancer cell functional assays examined the impact of RanBPM-knockdown on cellular growth and invasion.

Results: Higher expression of RanBPM was observed in tumor when compared to paired normal lung tissues. Increased RanBPM expression was seen in patients with longer overall and disease-free survival. Knockdown of RanBPM in lung cancer cell lines resulted in increased growth and invasion in vitro.

Conclusion: Increased expression of RanBPM associates with postponed disease progression and better prognosis. RanBPM plays an inhibitory role in regulating proliferation and invasion of lung cancer cells.

Keywords: RanBPM; adhesion; invasion; lung cancer; migration; proliferation.

MeSH terms

  • A549 Cells
  • Adaptor Proteins, Signal Transducing / genetics*
  • Cell Movement
  • Cell Proliferation
  • Cytoskeletal Proteins / genetics*
  • Disease Progression
  • Down-Regulation*
  • Female
  • Gene Expression Regulation, Neoplastic
  • Humans
  • In Vitro Techniques
  • Lung Neoplasms / genetics
  • Lung Neoplasms / pathology*
  • Neoplasm Invasiveness
  • Nuclear Proteins / genetics*
  • Prognosis
  • Survival Analysis

Substances

  • Adaptor Proteins, Signal Transducing
  • Cytoskeletal Proteins
  • Nuclear Proteins
  • Ran binding protein 9