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Effects of gastrokine‑2 expression on gastric cancer cell apoptosis by activation of extrinsic apoptotic pathways

  • Authors:
    • Lin‑Sen Shi
    • Hao Wang
    • Feng Wang
    • Min Feng
    • Meng Wang
    • Wen‑Xian Guan
  • View Affiliations / Copyright

    Affiliations: Department of Gastrointestinal Surgery, The Drum Tower Clinical College of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
    Copyright: © Shi et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
  • Pages: 2898-2904
    |
    Published online on: September 30, 2014
       https://doi.org/10.3892/mmr.2014.2603
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Abstract

Gastrokine‑2 is a putative gastric cancer‑specific tumor suppressor gene, the loss of which is known to be involved in the development and progression of gastric cancer, and restoration of gastrokine‑2 expression inhibits growth of gastric cancer cells in vitro. However, the underlying mechanism of these effects requires elucidation. In the present study, expression patterns of gastrokine‑2 protein were examined in gastric cancer tissues and cell lines. Expression of gastrokine‑2 was restored in gastric cancer cells in order to assess its effect on cell viability, apoptosis and gene expression. A total of 76 gastric cancer tissues with corresponding normal mucosae samples, and two gastric cancer cell lines (SGC‑7901 and AGS) were subjected to western blot analysis of gastrokine‑2 expression. SGC‑7901 cells were transiently transfected with gastrokine‑2 cDNA and then treated with anti‑CD95 and/or anti‑Fas antibodies prior to analysis of cell viability, apoptosis and gene expression levels. Expression of gastrokine‑2 protein was reduced or absent in gastric cancer tissues and gastric cancer cell lines. Following restoration of gastrokine‑2 expression, the protein expression level of Fas was significantly increased, but no marked change was observed in the levels of bcl‑2 and Bax proteins. Expression of gastrokine‑2 protein reduced gastric cancer cell viability and induced apoptosis. Activity of caspase‑3 and caspase‑8 was increased, but caspase‑9 activity remained unchanged in the SGC‑7901 cells. Reduction or knockout of gastrokine‑2 protein expression may contribute to gastric cancer development or progression, as the current study demonstrated that restoration of gastrokine‑2 expression induces apoptosis of gastric cancer cells through the extrinsic apoptosis pathway.
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Copy and paste a formatted citation
Spandidos Publications style
Shi LS, Wang H, Wang F, Feng M, Wang M and Guan WX: Effects of gastrokine‑2 expression on gastric cancer cell apoptosis by activation of extrinsic apoptotic pathways. Mol Med Rep 10: 2898-2904, 2014.
APA
Shi, L., Wang, H., Wang, F., Feng, M., Wang, M., & Guan, W. (2014). Effects of gastrokine‑2 expression on gastric cancer cell apoptosis by activation of extrinsic apoptotic pathways. Molecular Medicine Reports, 10, 2898-2904. https://doi.org/10.3892/mmr.2014.2603
MLA
Shi, L., Wang, H., Wang, F., Feng, M., Wang, M., Guan, W."Effects of gastrokine‑2 expression on gastric cancer cell apoptosis by activation of extrinsic apoptotic pathways". Molecular Medicine Reports 10.6 (2014): 2898-2904.
Chicago
Shi, L., Wang, H., Wang, F., Feng, M., Wang, M., Guan, W."Effects of gastrokine‑2 expression on gastric cancer cell apoptosis by activation of extrinsic apoptotic pathways". Molecular Medicine Reports 10, no. 6 (2014): 2898-2904. https://doi.org/10.3892/mmr.2014.2603
Copy and paste a formatted citation
x
Spandidos Publications style
Shi LS, Wang H, Wang F, Feng M, Wang M and Guan WX: Effects of gastrokine‑2 expression on gastric cancer cell apoptosis by activation of extrinsic apoptotic pathways. Mol Med Rep 10: 2898-2904, 2014.
APA
Shi, L., Wang, H., Wang, F., Feng, M., Wang, M., & Guan, W. (2014). Effects of gastrokine‑2 expression on gastric cancer cell apoptosis by activation of extrinsic apoptotic pathways. Molecular Medicine Reports, 10, 2898-2904. https://doi.org/10.3892/mmr.2014.2603
MLA
Shi, L., Wang, H., Wang, F., Feng, M., Wang, M., Guan, W."Effects of gastrokine‑2 expression on gastric cancer cell apoptosis by activation of extrinsic apoptotic pathways". Molecular Medicine Reports 10.6 (2014): 2898-2904.
Chicago
Shi, L., Wang, H., Wang, F., Feng, M., Wang, M., Guan, W."Effects of gastrokine‑2 expression on gastric cancer cell apoptosis by activation of extrinsic apoptotic pathways". Molecular Medicine Reports 10, no. 6 (2014): 2898-2904. https://doi.org/10.3892/mmr.2014.2603
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