Cathepsin F Knockdown Induces Proliferation and Inhibits Apoptosis in Gastric Cancer Cells

被引:25
|
作者
Ji, Ce [1 ]
Zhao, Ying [1 ]
Kou, You-Wei [1 ]
Shao, Hua [1 ]
Guo, Lin [1 ]
Bao, Chen-Hui [1 ]
Jiang, Ben-Chun [1 ]
Chen, Xin-Ying [1 ]
Dai, Jing-Wei [2 ]
Tong, Yu-Xin [3 ]
Yang, Ren [1 ]
Sun, Wei [1 ]
Wang, Qiang [1 ]
机构
[1] China Med Univ, Dept Gastrointestinal & Nutr Surg, Shengjing Hosp, 36 Sanhao St, Shenyang, Liaoning, Peoples R China
[2] China Med Univ, Dept Pancreat & Thyroidal Surg, Shengjing Hosp, Shenyang, Liaoning, Peoples R China
[3] China Med Univ, Med Res Ctr, Shengjing Hosp, Shenyang, Liaoning, Peoples R China
关键词
Gastric cancer (GC); Cathepsin F (CTSF); Proliferation; Apoptosis; Microarray; FATTY-ACID SYNTHASE; MOLECULAR-CLONING; P53; EXPRESSION; PATHWAY; PROTEIN; GENE; OVEREXPRESSION; CARCINOMA; PREDICTS;
D O I
10.3727/096504017X14928634401204
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Gastric cancer (GC) is one of the most common cancers in the world. The cathepsin F (CTSF) gene has recently been found to participate in the progression of several types of cancer. However, the clinical characteristics and function of CTSF in GC as well as its molecular mechanisms are not clear. Six GC cell lines and 44 paired adjacent noncancerous and GC tissue samples were used to assess CTSF expression by quantitative polymerase chain reaction (qPCR). We used lentivirus-mediated small hairpin RNA (Lenti-shRNA) against CTSF to knock down the expression of CTSF in GC cells. Western blot and qPCR were used to analyze the mRNA and related protein expression. The biological phenotypes of gastric cells were examined by cell proliferation and apoptosis assays. Microarray-based mRNA expression profile screening was also performed to evaluate the potential molecular pathways in which CTSF may be involved. The CTSF mRNA level was associated with tumor differentiation, depth of tumor invasion, and lymph node metastasis. Downregulation of CTSF expression efficiently inhibited apoptosis and promoted the proliferation of GC cells. Moreover, a total of 1,117 upregulated mRNAs and 1,143 downregulated mRNAs were identified as differentially expressed genes (DEGs). Further analysis identified the involvement of these mRNAs in cancer-related pathways and various other biological processes. Nine DEGs in cancer-related pathways and three downstream genes in the apoptosis pathway were validated by Western blot, which was mainly in agreement with the microarray data. To our knowledge, this is the first report investigating the effect of CTSF on the growth and apoptosis in GC cells and its clinical significance. The CTSF gene may function as a tumor suppressor in GC and may be a potential therapeutic target in the treatment of GC.
引用
收藏
页码:83 / 93
页数:11
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