癌变·畸变·突变 ›› 2016, Vol. 28 ›› Issue (2): 115-120.doi: 10.3969/j.issn.1004-616x.2016.02.007

• 论著 • 上一篇    下一篇

二亚硝基哌嗪上调AGR2促进鼻咽癌细胞转移

王巍巍, 唐发清, 李跃进   

  1. 珠海市人民医院/暨南大学附属珠海医院检验科, 广东珠海 519000
  • 收稿日期:2015-11-20 修回日期:2016-01-20 出版日期:2016-03-31 发布日期:2016-03-31
  • 通讯作者: 李跃进,E-mail:liyuejincat@163.com E-mail:liyuejincat@163.com
  • 作者简介:王巍巍,E-mail:wangweiweicat@163.com
  • 基金资助:
    国家自然科学基金资助项目(81402265)

Dinitrosopiperazine-mediated up-regulation of AGR2 expression promotes metastasis of nasopharyngeal cancer cells

WANG Weiwei, TANG Faqing, LI Yuejin   

  1. Department of Clinical Laboratory, Zhuhai People's Hospital & Zhuhai Hospital of Jinan University, Zhuhai 519000, Guangdong, China
  • Received:2015-11-20 Revised:2016-01-20 Online:2016-03-31 Published:2016-03-31

摘要: 目的: 探讨二亚硝基哌嗪(DNP)通过调控AGR2表达参与鼻咽癌转移的分子机制。方法: 以具有低转移潜能的鼻咽癌细胞6-10B作为研究材科,应用四甲基噻唑蓝(MTT)法检测DNP对6-10B细胞的非毒性浓度;分别采用间接免疫荧光法、Western blot和实时荧光定量PCR法检测DNP对6-10B细胞中AGR2蛋白及mRNA表达的影响;采用针对AGR2基因的特异性小干扰RNA(siRNA)沉默6-10B细胞AGR2的表达,并用Transwell小室法检测其对细胞侵袭和迁移能力的影响。结果: MTT法检测DNP对6-10B细胞的非毒性浓度为0~10.0 μmol/L;8.0 μmol/L DNP处理6-10B细胞后,间接免疫荧光法检测发现AGR2蛋白表达明显上调,且以在细胞质中表达为主;不同浓度的DNP处理6-10B细胞24 h或用8.0 μmol/L的DNP处理6-10B细胞不同时间后,Western blot结果发现AGR2蛋白的表达水平增加且呈浓度和时间依赖性(P<0.05);siRNA-AGR2沉默6-10B细胞屮AGR2基因的表达后,DNP诱导6-10B细胞的侵袭及迁移能力较干扰前明显降低(P<0.05)。结论: DNP可能通过在转录水平上调AGR2的表达,影响鼻咽癌细胞的侵袭和转移能力。

关键词: 鼻咽癌, 二亚硝基哌嗪, AGR2, 肿瘤转移

Abstract: OBJECTIVE: To investigate theinduction of AGR2 expression by dinitrosopiperazine (DNP) in nasopharyngeal cancer cell (NPC) 6-10B and to explore involvement of DNP in NPC metastasis. METHODS: Non-cytotoxic concentrations of DNP on 6-10B cells were determined using MTT. Expression of AGR2 protein and mRNA in 6-10B cells which were treated with DNP were detected by indirect immunofluorescence, Western blotting and real-time RT-PCR, respectively. In addition, silencing the expression of AGR2 by siRNA-AGR2 was investigated. The capabilities of invasion and migration of 6-10B cells were investigated using Transwell assay. RESULTS: The range of non-cytotoxic concentrations (NCC) of DNP was 0-10.0 μmol/L. The results of indirect immunofluorescence showed AGR2 mainly expressed in cytoplasm after DNP treatment. These and 5-8F cells had stronger fluorescence intensity than untreated 6-10B cells. The DNP-induced AGR2 expression showed dose- and time-dependent effects. Real-time RT PCR analyses showed that AGR2 mRNA expression rate was 1.01±0.08 in the untreated 6-10B cells and 3.96±0.15 in the cells treated with 8.0 μmol/L DNP. The difference was significant. In addition, the relative fold gene expression of AGR2 in 5-8F cells was higher than that in non-treated 6-10B cells (P<0.05). The transwell migration and invasion data showed that siRNA-AGR2 transfection blocked AGR2 expression in 6-10B cells. In addition, both DNP-induced invasion and motility were dramatically decreased when AGR2 expression was blocked (P<0.05). However, DNP could effectively induce cell invasion (P<0.05) and motility (P<0.05) when AGR2 was not blocked. CONCLUSION: DNP could up-regulate AGR2 expression in 6-10B cells through transcriptional regulation mechanism and then mediate the metastasis of nasopharyngeal cancer cells.

Key words: nasopharyngeal cancer, dinitrosopiperazine, AGR2, neoplasm metastasis

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