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Expression and phosphorylation of FOXO1 influences cell proliferation and apoptosis in the gastrointestinal stromal tumor cell line GIST-T1

  • Authors:
    • Tao Wang
    • Hui Zhao
    • Hua Gao
    • Changming Zhu
    • Yao Xu
    • Liping Bai
    • Junbo Liu
    • Feng Yan
  • View Affiliations / Copyright

    Affiliations: Department of Gastrointestinal Surgery, The Affiliated Zhongshan Hospital of Xiamen University, Xiamen, Fujian 361004, P.R. China, Medical Cosmetology, Xiamen Hospital of Traditional Chinese Medicine, Xiamen, Fujian 361009, P.R. China
    Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 3197-3202
    |
    Published online on: February 8, 2018
       https://doi.org/10.3892/etm.2018.5853
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Abstract

The mitogen-activated protein kinase (MAPK) and phosphatidylinositol 3‑kinase (PI3K) pathways are activated during pathogenesis of gastrointestinal stromal tumors (GISTs). Forkhead box protein O1 (FOXO1) is a transcription factor regulated by the MAPK and PI3K pathways and is associated with multiple metabolic reactions. The present study aims to investigate the association of FOXO1 with cell proliferation and apoptosis in the cell line, GIST‑T1. Cell counting kit‑8 assay revealed that cell growth was inhibited by the PI3K inhibitor, LY294002, and/or MAPK inhibitor, UO126. Western blotting demonstrated that the expression of p‑FOXO1 and B‑cell lymphoma 2 (Bcl2) were significantly reduced, whereas the expression of Bcl‑2‑associated X protein was significantly increased following treatment with LY294002 and/or UO126 (all P<0.05). However, no significant change was revealed in the level of total FOXO1. Flow cytometry revealed that apoptosis was significantly increased by the pathway inhibitors (P<0.05). Specifically, the proportion of cells in the G1 phase was increased whereas the proportion in the S phase was reduced. The changes of protein expression and cell apoptosis were more evident in the LY294002 + UO126 group than in either single‑inhibitor group. The results indicated that FOXO1 was able to affect cell proliferation, apoptosis and the cell cycle of GISTs. The regulation of FOXO1 was part of the PI3K and MAPK signaling network, while this regulation was mostly activated by phosphorylation of FOXO1.
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Copy and paste a formatted citation
Spandidos Publications style
Wang T, Zhao H, Gao H, Zhu C, Xu Y, Bai L, Liu J and Yan F: Expression and phosphorylation of FOXO1 influences cell proliferation and apoptosis in the gastrointestinal stromal tumor cell line GIST-T1. Exp Ther Med 15: 3197-3202, 2018.
APA
Wang, T., Zhao, H., Gao, H., Zhu, C., Xu, Y., Bai, L. ... Yan, F. (2018). Expression and phosphorylation of FOXO1 influences cell proliferation and apoptosis in the gastrointestinal stromal tumor cell line GIST-T1. Experimental and Therapeutic Medicine, 15, 3197-3202. https://doi.org/10.3892/etm.2018.5853
MLA
Wang, T., Zhao, H., Gao, H., Zhu, C., Xu, Y., Bai, L., Liu, J., Yan, F."Expression and phosphorylation of FOXO1 influences cell proliferation and apoptosis in the gastrointestinal stromal tumor cell line GIST-T1". Experimental and Therapeutic Medicine 15.4 (2018): 3197-3202.
Chicago
Wang, T., Zhao, H., Gao, H., Zhu, C., Xu, Y., Bai, L., Liu, J., Yan, F."Expression and phosphorylation of FOXO1 influences cell proliferation and apoptosis in the gastrointestinal stromal tumor cell line GIST-T1". Experimental and Therapeutic Medicine 15, no. 4 (2018): 3197-3202. https://doi.org/10.3892/etm.2018.5853
Copy and paste a formatted citation
x
Spandidos Publications style
Wang T, Zhao H, Gao H, Zhu C, Xu Y, Bai L, Liu J and Yan F: Expression and phosphorylation of FOXO1 influences cell proliferation and apoptosis in the gastrointestinal stromal tumor cell line GIST-T1. Exp Ther Med 15: 3197-3202, 2018.
APA
Wang, T., Zhao, H., Gao, H., Zhu, C., Xu, Y., Bai, L. ... Yan, F. (2018). Expression and phosphorylation of FOXO1 influences cell proliferation and apoptosis in the gastrointestinal stromal tumor cell line GIST-T1. Experimental and Therapeutic Medicine, 15, 3197-3202. https://doi.org/10.3892/etm.2018.5853
MLA
Wang, T., Zhao, H., Gao, H., Zhu, C., Xu, Y., Bai, L., Liu, J., Yan, F."Expression and phosphorylation of FOXO1 influences cell proliferation and apoptosis in the gastrointestinal stromal tumor cell line GIST-T1". Experimental and Therapeutic Medicine 15.4 (2018): 3197-3202.
Chicago
Wang, T., Zhao, H., Gao, H., Zhu, C., Xu, Y., Bai, L., Liu, J., Yan, F."Expression and phosphorylation of FOXO1 influences cell proliferation and apoptosis in the gastrointestinal stromal tumor cell line GIST-T1". Experimental and Therapeutic Medicine 15, no. 4 (2018): 3197-3202. https://doi.org/10.3892/etm.2018.5853
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