Open Access

FGFR3 silencing by siRNA inhibits invasion of A549 cells

  • Authors:
    • Yuhua Li
    • Xiguang Liu
    • Hongjun Zhang
    • Tao Jiang
    • Wenjing Xiao
    • Shufen Zhao
    • Xiaoyun Yu
    • Fanjie Han
  • View Affiliations

  • Published online on: October 18, 2016     https://doi.org/10.3892/ol.2016.5278
  • Pages: 4319-4326
  • Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The present study identified that fibroblast growth factor receptor 3 (FGFR3) was significantly upregulated in bone metastasis of lung adenocarcinoma. RNA interference (RNAi) is a powerful approach for treating a wide range of human diseases, including cancer, through downregulating the expression of selected genes. In the present study, the invasiveness of A549 cells cultured in vitro was altered by small interfering (si)RNA targeting FGFR3, and the regulatory effect of silencing FGFR3 on the expression levels of E‑cadherin and matrix metalloproteinase (MMP)9 was investigated. Human lung adenocarcinoma A549 cells were transfected with synthetic specific siRNAs targeting a fragment of the FGFR3 gene (namely, siRNA‑855, siRNA‑1447 and siRNA‑2076) or with negative control (NC) siRNA. Cells were divided into five groups (A, siRNA‑855 group; B, siRNA‑1447 group; C, siRNA‑2076 group; D, NC‑siRNA group; and E, blank control group). The effect of the above siRNAs targeting FGFR3 on the invasion capacity of A549 cells was detected by Transwell assay. siRNAs against FGFR3 were transfected into A549 cells with by Lipofectamine® 2000, and the expression levels of FGFR3, E‑cadherin and MMP9 were measured by reverse transcription‑quantitative polymerase chain reaction and western blot assay. The experimental findings indicated that the expression levels of FGFR3 and MMP9 were significantly reduced in the siRNA‑FGFR3‑transfected groups (A‑C groups), compared with those in the D and E groups (P<0.01). In addition, the expression levels of E‑cadherin were markedly elevated in the A‑C groups, compared with those in the D and E groups (P<0.01). There was no significant difference in E‑cadherin expression between the A‑C groups, or between the D and E groups (P>0.05). These results indicated that siRNA‑FGFR3 was able to decrease the invasiveness of A549 cells, inhibit the expression of MMP9 and increase the expression of E‑cadherin by downregulating the expression of FGFR3. Taken together, the results of the present study indicated that the upregulation of E‑cadherin expression and the downregulation of MMP9 expression are able to inhibit the migration of A549 cells, and siRNA silencing FGFR3 acts as a tumor suppressor in these cells.
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December-2016
Volume 12 Issue 6

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Copy and paste a formatted citation
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Spandidos Publications style
Li Y, Liu X, Zhang H, Jiang T, Xiao W, Zhao S, Yu X and Han F: FGFR3 silencing by siRNA inhibits invasion of A549 cells. Oncol Lett 12: 4319-4326, 2016
APA
Li, Y., Liu, X., Zhang, H., Jiang, T., Xiao, W., Zhao, S. ... Han, F. (2016). FGFR3 silencing by siRNA inhibits invasion of A549 cells. Oncology Letters, 12, 4319-4326. https://doi.org/10.3892/ol.2016.5278
MLA
Li, Y., Liu, X., Zhang, H., Jiang, T., Xiao, W., Zhao, S., Yu, X., Han, F."FGFR3 silencing by siRNA inhibits invasion of A549 cells". Oncology Letters 12.6 (2016): 4319-4326.
Chicago
Li, Y., Liu, X., Zhang, H., Jiang, T., Xiao, W., Zhao, S., Yu, X., Han, F."FGFR3 silencing by siRNA inhibits invasion of A549 cells". Oncology Letters 12, no. 6 (2016): 4319-4326. https://doi.org/10.3892/ol.2016.5278