Zeng Rong, Huang Jun-Peng, Li Xu Feng, Xiong Wei-Bin, Wu Gang, Jiang Zhao-Jing, Song Shu-Jie, Li Ji-Qiang, Zheng Yan-Fang, Zhang Ji-Ren
Oncology Center, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
Oncology Center, Yuhuangding Hospital, Medical College, Qingdao University, Yantai, Shandong, China.
Cell Biochem Funct. 2016 Apr;34(3):133-41. doi: 10.1002/cbf.3170. Epub 2016 Feb 24.
EPB41L3 may play a role as a metastasis suppressor by supporting regular arrangements of actin stress fibres and alleviating the increase in cell motility associated with enhanced metastatic potential. Downregulation of epb41l3 has been observed in many cancers, but the role of this gene in esophageal squamous cell carcinoma (ESCC) remains unclear. Our study aimed to determine the effect of epb41l3 on ESCC cell migration and invasion. We investigated epb41l3 protein expression in tumour and non-tumour tissues by immunohistochemical staining. Expression in the non-neoplastic human esophageal cell line Het-1a and four ESCC cell lines - Kyse150, Kyse510, Kyse450 and Caes17 - was assessed by quantitative Polymerase Chain Reaction (qPCR) and Western blotting. Furthermore, an EPB41L3 overexpression plasmid and EPB41L3-specific small interfering RNA were used to upregulate EPB41L3 expression in Kyse150 cells and to downregulate EPB41L3 expression in Kyse450 cells, respectively. Cell migration and invasion were evaluated by wound healing and transwell assays, respectively. The expression levels of p-AKT, matrix metalloproteinase (MMP)2 and MMP9 were evaluated. Expression of epb41l3 was significantly lower in tumour tissues than in non-tumour tissues and in ESCC cell lines compared with the Het-1a cell line. Kyse450 and Caes17 cells exhibited higher expression of epb41l3 than Kyse150 and Kyse510 cells. Overexpressing epb41l3 decreased Kyse150 cell migration and invasion, whereas EPB41L3-specific small interfering RNA silencing increased these functions in Kyse450 cells. Furthermore, overexpressing epb41l3 led to downregulation of MMP2 and MMP9 in Kyse150 and Kyse510 cells. Our findings reveal that EPB41L3 suppresses tumour cell invasion and inhibits MMP2 and MMP9 expression in ESCC cells.
EPB41L3可能通过支持肌动蛋白应激纤维的规则排列以及减轻与转移潜能增强相关的细胞运动性增加来发挥转移抑制作用。在许多癌症中都观察到epb41l3的下调,但其在食管鳞状细胞癌(ESCC)中的作用仍不清楚。我们的研究旨在确定epb41l3对ESCC细胞迁移和侵袭的影响。我们通过免疫组织化学染色研究了肿瘤组织和非肿瘤组织中epb41l3蛋白的表达。通过定量聚合酶链反应(qPCR)和蛋白质免疫印迹法评估了非肿瘤性人食管细胞系Het-1a和四种ESCC细胞系——Kyse150、Kyse510、Kyse450和Caes17中epb41l3的表达。此外,分别使用EPB41L3过表达质粒和EPB41L3特异性小干扰RNA上调Kyse150细胞中EPB41L3的表达并下调Kyse450细胞中EPB41L3的表达。分别通过伤口愈合试验和Transwell试验评估细胞迁移和侵袭。评估了p-AKT、基质金属蛋白酶(MMP)2和MMP9的表达水平。与Het-1a细胞系相比,肿瘤组织中epb41l3的表达水平明显低于非肿瘤组织以及ESCC细胞系中的表达水平。Kyse450和Caes17细胞中epb41l3的表达高于Kyse150和Kyse510细胞。过表达epb41l3可降低Kyse150细胞的迁移和侵袭能力,而EPB41L3特异性小干扰RNA沉默则增强了Kyse450细胞的这些功能。此外,过表达epb41l3导致Kyse150和Kyse510细胞中MMP2和MMP9的表达下调。我们的研究结果表明,EPB41L3抑制ESCC细胞的肿瘤细胞侵袭并抑制MMP2和MMP9的表达。