IGHMBP2过表达促进食管鳞癌细胞的侵袭和迁移

doi:10.16288/j.yczz.14-371

遗传 ›› 2015, Vol. 37 ›› Issue (4): 360-366.doi: 10.16288/j.yczz.14-371

IGHMBP2过表达促进食管鳞癌细胞的侵袭和迁移

王春丽¹,郝佳洁²,吴李飞³,潘蓓青²,徐昕²,蔡岩²,王明荣²,贾雪梅¹

1. 安徽医科大学组织胚胎学教研室,合肥 230032;
2. 中国医学科学院北京协和医学院,肿瘤医院肿瘤研究所,分子肿瘤学国家重点实验室,北京 100021;
3. 安徽医科大学安庆市立医院消化内科,安庆 246000

收稿日期:2014-10-29 出版日期:2015-04-20 发布日期:2015-03-06
通讯作者: 王明荣,博士,研究员,研究方向：肿瘤遗传学。E-mail: wangmr2015@126.com;贾雪梅,硕士,教授,研究方向：肿瘤遗传学。E-mail: jiaxueme@126.com E-mail:wcl4496@126.com
作者简介:王春丽,硕士研究生,专业方向：肿瘤遗传学。E-mail: wcl4496@126.com
基金资助:
国家高技术研究发展计划项目(863计划)(编号：SS2014AA020601)和国家自然科学基金项目(编号：81321091)资助

IGHMBP2 overexpression promotes cell migration and invasion in esophageal squamous carcinoma

Chunli Wang¹,Jiajie Hao²,Lifei Wu³,Beiqing Pan²,Xin Xu²,Yan Cai²,Mingrong Wang²,Xuemei Jia¹

1. Department of Histology and Embryology, Anhui Medical University, Hefei 230032, China;
2. State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China;
3. Department of Gastroenterology, Anqing Municipal Hospital of Anhui Medical University, Anqing 246000, China

Received:2014-10-29 Online:2015-04-20 Published:2015-03-06

摘要/Abstract

摘要： IGHMBP2(Immunoglobulin mu binding protein 2)基因编码一种解旋酶,参与DNA的复制和修复,并且作为转录调节因子在基因转录中发挥重要作用。IGHMBP2基因定位于11q13.2,该染色体区段在食管鳞癌中扩增频率较高。为了探讨IGHMBP2基因在食管鳞癌中的扩增情况及其在食管鳞癌中的作用,文章对本实验室前期报道的59例食管鳞癌原发肿瘤array-CGH数据进行分析,结果显示IGHMBP2基因扩增频率为28.9%(17/59)。进一步利用荧光原位杂交(FISH)和Western blot技术,发现食管鳞癌细胞系KYSE30、KYSE180、KYSE510和KYSE150中存在IGHMBP2基因扩增/增益以及蛋白高表达。敲降IGHMBP2后,KYSE30和KYSE150细胞的侵袭迁移能力明显降低(P<0.001),侵袭迁移相关蛋白E-cadherin的表达水平升高;敲降后转染IGHMBP2质粒,回复其蛋白表达后,细胞的侵袭迁移能力又得以恢复(P<0.01)。上述结果表明,IGHMBP2过表达可能通过降低E-cadherin的表达从而增强食管鳞癌细胞的侵袭迁移能力。

关键词: IGHMBP2, 食管鳞癌, 扩增, 侵袭, 迁移

Abstract: Immunoglobulin mu binding protein 2 (IGHMBP2) is located in 11q13.2, which is frequently amplified in esophageal squamous cell carcinoma (ESCC). IGHMBP2 encodes a helicase involved in DNA replication and repair. IGHMBP2 protein also regulates gene transcription. The present study aims to explore the amplification of IGHMBP2 and its potential role in ESCC. A further analysis of our previously reported array-CGH data showed that IGHMBP2 was amplified in 28.9% of primary ESCC tumors. Fluorescence in situ hybridization (FISH) and Western blot showed that IGHMBP2 was amplified and overexpressed in KYSE30, KYSE180, KYSE510 and KYSE150 esophageal cancer cell lines. Transwell assays demonstrated that knockdown of IGHMBP2 in KYSE30 and KYSE150 inhibited cell invasion and migration, and increased the expression levels of E-cadherin. When rescue plasmids expressing IGHMBP2 were introduced, the abilities of cell invasion and migration were restored. These data suggest that IGHMBP2 overexpression may promote invasion and migration of ESCC cells through down-regulation of E-cadherin.

Key words: IGHMBP2, esophageal squamous cell carcinoma, amplification, invasion, migration

王春丽,郝佳洁,吴李飞,潘蓓青,徐昕,蔡岩,王明荣,贾雪梅. IGHMBP2过表达促进食管鳞癌细胞的侵袭和迁移[J]. 遗传, 2015, 37(4): 360-366.

Chunli Wang,Jiajie Hao,Lifei Wu,Beiqing Pan,Xin Xu,Yan Cai,Mingrong Wang,Xuemei Jia. IGHMBP2 overexpression promotes cell migration and invasion in esophageal squamous carcinoma[J]. HEREDITAS(Beijing), 2015, 37(4): 360-366.

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IGHMBP2过表达促进食管鳞癌细胞的侵袭和迁移

IGHMBP2 overexpression promotes cell migration and invasion in esophageal squamous carcinoma

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