West China Journal of Stomatology ›› 2020, Vol. 38 ›› Issue (2): 177-184.doi: 10.7518/hxkq.2020.02.012

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Effects of farnesyltransferase silencing on the migration and invasion of tongue squamous cell carcinoma

Sheng Shangui1, Wang Ya’nan2, Wang Shaoru3,4, Zhao Kai1, Wang Yunying5, Xu Xiaona5, Wang Qimin3, Tong Lei3, Chen Zhenggang3()   

  1. 1. School of Stomatology, Qingdao University, Qingdao 266003, China
    2. Dept. of Oral and Maxillofacial Surgery, Qingdao Stomatological Hospital, Qingdao 266000, China
    3. Medical Center of Stomatology, Qingdao Municipal Hospital, Qingdao 266071, China
    4. Stomatology College, Dalian Medical University, Dalian 116044, China
    5. Central Laboratory of Qingdao Municipal Hospital, Qingdao 266000, China
  • Received:2019-09-11 Revised:2019-12-19 Online:2020-04-01 Published:2020-04-15
  • Contact: Zhenggang Chen E-mail:chenzhg1973@163.com
  • Supported by:
    The National Natural Science Foundation of China(81372908)


Objective This study aimed to explore the effects of silencing farnesyltransferase (FTase) on the migration and invasion of tongue squamous cell carcinoma (TSCC) through RNA interference. Methods TSCC cells (CAL27 and SCC-4) were cultured in vitro and then transfected with siRNA to silence FTase expression. The tested cells were categorized as follows: experimental group (three RNA interference groups), negative control group, and blank control group. mRNA expression of FTase and HRAS in each group was analyzed by quantitative real-time polymerase chain reaction. On the basis of FTase mRNA expression, the optimum interference group (highest silencing efficiency) was selected as the experimental group for further study. The protein expression of FTase, HRAS, p65, p-p65(S536), matrix metalloprotein-9 (MMP-9), hypoxia inducible factor-1α (HIF-1α), and vascular endothelial growth factor (VEGF) was analyzed by Western blot. The invasion and migration abilities of TSCC cells were determined by Transwell invasion assay and cell wound healing assay. Results The mRNA and protein expression of FTase in the experimental group decreased compared with that in the negative control and blank control groups (P<0.05). The mRNA and protein expression of HRAS was not significantly different among the groups (P>0.05). In the experimental group, the protein expression of p-p65(S536), MMP-9, HIF-1α, and VEGF decreased (P<0.05), whereas that of p65 had no significant change (P>0.05). The migration and invasion abilities of the experimental group were inhibited significantly (P<0.05). Conclusion Silencing FTase in vitro could effectively downregulate its expression in TSCC cell lines and reduce the migration and invasion abilities to a certain extent. FTase could be a new gene therapy target of TSCC, and this research provided a new idea for the clinical treatment of TSCC.

Key words: farnesyltransferase, tongue squamous cell carcinoma, migration, invasion

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