Down-Regulation of 14-3-3σ Reduces Proliferation of Human Lung Cancers But Not Colon Cancer Cells

Authors

  • Somrudee Nunun Department of Biomedical Sciences, The Excellent Research Laboratory of Cancer Molecular Biology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
  • Paramee Thongsuksai Department of Biomedical Sciences, The Excellent Research Laboratory of Cancer Molecular Biology, Department of Pathology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
  • Keson Trakunrum Department of Biomedical Sciences, The Excellent Research Laboratory of Cancer Molecular Biology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
  • Pritsana Raungrut Department of Biomedical Sciences, The Excellent Research Laboratory of Cancer Molecular Biology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.

DOI:

https://doi.org/10.31584/jhsmr.2018.36.2.3

Keywords:

14-3-3σ, cancer, cell proliferation, siRNA

Abstract

Objective: 14-3-3σ protein is well known for its tumor suppressive function in breast cancer. However, recent evidence has raised the possibility that the 14-3-3σ protein may also have an oncogenic function in certain cancer types. The aim of this study was to investigate the oncogenic function of 14-3-3σ in adenocarcinoma cell lines of the lung (A549, H358) and colon (HT-29).
Material and Methods: siRNA against 14-3-3σ was used to suppress 14-3-3σ expression. Cell proliferation, cell-cycle distribution and expression of related molecules were determined by MTT, flow cytometry, and western blotting, respectively.
Results: Down-regulation of 14-3-3σ significantly reduced the proliferation of A549 and H358 by 35.0% and 31.0%, respectively, and significantly induced cell cycle arrest at the G0/G1 and G2/M phases, respectively. Increased p21 expression by 43.0% was only observed in si-14-3-3σ-H358 cells. The si-14-3-3σ-HT-29 cells showed no alteration of cell proliferation and cell-cycle distribution but harbored reduced p53 expression by 56.0% and p27 expression by 67.0%.
Conclusion: 14-3-3σ may have an oncogenic function in lung adenocarcinoma but play a different role in colon cancer.

Author Biographies

Somrudee Nunun, Department of Biomedical Sciences, The Excellent Research Laboratory of Cancer Molecular Biology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.

 

 

Paramee Thongsuksai, Department of Biomedical Sciences, The Excellent Research Laboratory of Cancer Molecular Biology, Department of Pathology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.

 

 

Pritsana Raungrut, Department of Biomedical Sciences, The Excellent Research Laboratory of Cancer Molecular Biology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.

 

 

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Published

2018-05-24

How to Cite

1.
Nunun S, Thongsuksai P, Trakunrum K, Raungrut P. Down-Regulation of 14-3-3σ Reduces Proliferation of Human Lung Cancers But Not Colon Cancer Cells. J Health Sci Med Res [Internet]. 2018 May 24 [cited 2024 Apr. 16];36(2):97-105. Available from: https://he01.tci-thaijo.org/index.php/jhsmr/article/view/125480

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