Effects of isoprenylcysteine carboxylmethyltransferase silencing on the migration and invasion of tongue squamous cell carcinoma.

Abstract

OBJECTIVES:

The effect of isoprenylcysteine carboxymethyltransferase (ICMT) silencing on the migration and invasion of tongue squamous cell carcinoma was investigated by constructing the small interfering RNA (siRNA) of ICMT.

METHODS:

Through liposomal transfection, siRNA was transfected into human tongue squamous cell carcinoma CAL-27 and SCC-4 cells (ICMT-siRNA group) with a negative control group (transfected with NC-siRNA) and a blank control group (transfected with a transfection reagent but not with siRNA). Quantitative real-time polymerase chain reaction was performed to analyze the mRNA expression of ICMT and RhoA in each group of cells after transfection and to measure the silencing efficiency. Western blot was applied to examine the expression levels of ICMT, total RhoA, membrane RhoA, ROCK1, matrix metalloproteinase (MMP)-2, and MMP-9 proteins in each group. The migration and invasion abilities were evaluated via wound healing and Transwell motility assays.

RESULTS:

After CAL-27 and SCC-4 cells were transfected with ICMT-siRNA, the expression levels of ICMT genes and proteins decreased significantly in the experimental group compared with those in the negative and blank control groups (P<0.05). The mRNA and total protein expression levels of RhoA in the two groups were not significantly different (P>0.05). The expression levels of RhoA membrane protein, ROCK1, MMP-2, and MMP-9 decreased (P<0.05). The migration and invasion abilities were inhibited (P<0.05).

CONCLUSIONS:

The migration and invasion abilities of CAL-27 and SCC-4 cells were reduced significantly after the transfection of ICMT-siRNA, and the involved mechanism might be related to the RhoA-ROCK signaling pathway.

• Authors: Nan Zhou, Zeng-Peng Chi, Wen-Jian Li, Kai Zhao, Shao-Ru Wang, Qi-Min Wang, Lei Tong, Zong-Xuan He, Hong-Yu Han, Ying Wang, Zheng-Gang Chen
• Journal: Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology (Hua Xi Kou Qiang Yi Xue Za Zhi) Vol. 39 Issue 3 Pg. 328-335 (Jun 01 2021) ISSN: 2618-0456 [Electronic] China
• PMID: 34041883 (Publication Type: Journal Article)

Chemical References

• RNA, Small Interfering
• Protein Methyltransferases
• protein-S-isoprenylcysteine O-methyltransferase
• ROCK1 protein, human
• rho-Associated Kinases

Topics

• Carcinoma, Squamous Cell
• Cell Line, Tumor
• Cell Movement
• Cell Proliferation
• Humans
• Neoplasm Invasiveness
• Protein Methyltransferases
• RNA, Small Interfering
• Tongue
• Tongue Neoplasms
• Transfection
• rho-Associated Kinases