基础研究(Basic Research)

人结肠癌细胞中高尔基磷蛋白3表达与Wnt信号通路的关系

Published at: 2016年第25卷第10期

陈志雄 1 , 洪钟时 1 , 邱成志 1 , 余外市 1 , 王春晓 1 , 郭延塔 1
1 福建医科大学附属第二医院 普通外科,福建 泉州 362000
通讯作者 成志 邱 Email: qchengzhi@sohu.com
DOI: 10.3978/j.issn.1005-6947.10.3978/j.issn.1005-6947.2016.10.013
基金:
福建省自然科学基金资助项目 2015J01438
福建省泉州市科技计划资助项目 2013Z97

摘要

目的:探讨人结肠癌细胞中高尔基磷蛋白3(GOLPH3)基因表达与Wnt信号通路活性的关系。方法:用RT-PCR方法检测4种人结肠癌细胞(HCT116、HT29、SW480、SW620)中GOLPH3 mRNA的表达,选取GOLPH3高表达的细胞株行GOLPH3基因干扰,用RT-PCR检测干扰效果,然后用TOPFlash报告基因、平板克隆实验、Western blot法分别检测干扰后细胞Wnt信号通路活性、增殖活性以及GOLPH3与β-catenin表达的变化。结果:4种结肠癌细胞中SW620细胞的GOLPH3mRNA相对表达量最高;SW620细胞转染GOLPH3 siRNA后GOLPH3 mRNA的相对表达量明显降低(P<0.001);与未处理的SW620细胞比较,转染GOLPH3siRNA的SW620细胞Wnt通路转录活性明显降低(0.342 vs. 1.000,P<0.001)、癌细胞集落形成数明显减少(82.333 vs. 207.333,P<0.001)、GOLPH3与β-catenin蛋白表达均明显降低(0.260 vs. 1.00;0.182 vs. 1.00,均P<0.001)。结论:人结肠癌细胞中GOLPH3的高表达可增加Wnt/β-catenin细胞信号通路活性,从而促进细胞增殖。


Relationship between Golgi phosphoprotein 3 expression and Wnt signaling pathway in human colon cancer cells

Abstract

Objective: To investigate the relationship between the expression of Golgi phosphoprotein 3 (GOLPH3) gene and the activity of Wnt signaling pathway in human colon cancer cells. Methods: The GOLPH3 mRNA expressions in 4 different human colon cancer cell lines (HCT116, HT29, SW480 and SW620) were detected by RT-PCR, after which, the cell line with highest GOLPH3 mRNA expression was selected and then underwent GOLPH3 gene interference, and the RNA interference effect was examined by RT-PCR. In the colon cancer cells after interference, the changes in the activity of Wnt signaling pathway, proliferative ability and protein expressions of GOLPH3 and β-catenin were detected by TOPFlash reporter gene assay, flat plate colony-forming assay and Western blot analysis, respectively. Results: SW620 cells showed the highest relative GOLPH3 mRNA expression among the 4 types of colon cancer cell lines. The relative GOLPH3 mRNA expression was significantly reduced after GOLPH3 siRNA transfection in SW620 cells (P<0.001). In SW620 cells after GOLPH3 siRNA transfection compared with untreated SW620 cells, the transcriptional activity of Wnt signaling pathway was significantly decreased (0.342 vs. 1.000, P<0.001), the number of cancer cell colon formation was significantly reduced (82.333 vs. 207.333, P<0.001), and both GOLPH3 and β-catenin protein expressions were significantly down-regulated (0.260 vs. 1.00; 0.182 vs. 1.00, both P<0.001). Conclusion: In human colon cancer cells, increased GOLPH3 expression may up-regulate the acitivity of Wnt/β-catenin signaling pathway, and thereby promote cell proliferation.


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引用

引用本文: 志雄 陈, 钟时 洪, 成志 邱, 外市 余, 春晓 王, 延塔 郭. 人结肠癌细胞中高尔基磷蛋白3表达与Wnt信号通路的关系[J]. 中国普通外科杂志, 2016, 25(10): 1444-1449.
Cite this article as: CHEN Zhixiong, HONG Zhongshi, QIU Chengzhi, YU Waishi, WANG Chunxiao, GUO Yanta . Relationship between Golgi phosphoprotein 3 expression and Wnt signaling pathway in human colon cancer cells [J]. Chin J Gen Surg, 2016, 25(10): 1444-1449.