Tumor Biology

, Volume 37, Issue 9, pp 12725–12730 | Cite as

Silencing of TGIF attenuates the tumorigenicity of A549 cells in vitro and in vivo

  • Yadong Wang
  • Teng Pan
  • Haiyu Wang
  • Li Li
  • Jiangmin Li
  • Congke Zhang
  • Haiyan Yang
Original Article


The aim of this study was to investigate the effects of the silencing of the TG-interacting factor (TGIF) on the tumorigenicity of A549 cells in vitro and in vivo. Stable TGIF-silenced A549 cells were established by infecting shRNA lentiviral particles. Western blotting analysis was used to detect the expression of proteins. Cell cycle was detected by flow cytometry. Soft agar assay and tumor formation assay in nude mice were applied. The silencing of TGIF inhibited A549 cell proliferation, colony formation in vitro, growth of tumor xenograft in vivo, and arrested the cell cycle in the G1 phase. The expression of CDK4, cyclin D1, and phospho-Rb was markedly decreased in the A549-shTGIF cells compared with the A549-shcon cells, and p21 was markedly increased in the A549-shTGIF cells compared with the A549-shcon cells. A lower level of β-Catenin protein expression was observed in the A549-shTGIF cells than that in the A549-shcon cells. The silencing of TGIF attenuates the tumorigenicity of A549 cells in vitro and in vivo.


TGIF A549 cell Tumorigenicity Cell cycle 



This work was supported by grants from the National Natural Science Foundation of China (U1404815) and the Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine (XTCX-2015-PY7). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Compliance with ethical standards

Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2016

Authors and Affiliations

  • Yadong Wang
    • 1
    • 2
  • Teng Pan
    • 3
  • Haiyu Wang
    • 1
  • Li Li
    • 1
  • Jiangmin Li
    • 1
  • Congke Zhang
    • 1
  • Haiyan Yang
    • 3
  1. 1.Department of ToxicologyHenan Center for Disease Control and PreventionZhengzhouChina
  2. 2.Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory MedicineXinxiang Medical UniversityXinxiangChina
  3. 3.Department of Epidemiology, School of Public HealthZhengzhou UniversityZhengzhouChina

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