E2F7介导CXCL5转录促进未分化甲状腺癌发展  

E2F7-mediated CXCL5 transcription to promote anaplastic thyroid cancer progression

作　　者：潘星合 郭宏鹏 李尤 孙成林[1] PAN Xinghe;GUO Hongpeng;LI You;SUN Chenglin(Department of General Surgery,Central Hospital Affiliated to Shenyang Medical College,Shenyang 110024,China;Department of General Surgery,Central Hosipital of Shenyang Sujiatun,Shenyang 110101,China)

机构地区：[1]沈阳医学院附属中心医院普外一科,沈阳110024 [2]沈阳市苏家屯区中心医院普外科,沈阳110101

出　　处：《中国医科大学学报》2024年第10期907-913,共7页Journal of China Medical University

基　　金：辽宁省科学技术计划重大科研项目(2022JH2/101300035);沈阳市科学技术计划(21-173-9-18);沈阳医学院硕士研究生科技创新基金(Y20220531)。

摘　　要：目的探讨转录因子E2F7对未分化甲状腺癌细胞体外增殖、迁移和侵袭及体内肿瘤生长的促进作用。方法慢病毒转染建立稳定敲减E2F7的CAL-62细胞,实时PCR检测细胞中E2F7表达以验证转染效率。将CAL-62细胞分为sh-NC组和sh-E2F7组,CCK-8法检测细胞增殖能力,Transwell实验检测细胞的迁移和侵袭能力。将CAL-62细胞皮下注射入裸鼠并观察肿瘤生长。EPD网站在线预测CXCL5启动子的E2F7结合位点,双荧光素酶报告基因实验检测敲减E2F7对CXCL5启动子荧光素酶活性的影响。实时PCR和ELISA检测敲减E2F7对CAL-62细胞CXCL5水平的影响。将CAL-62细胞分为sh-E2F7+空载体组和sh-E2F7+CXCL5组,进一步检测在敲减E2F7的基础上过表达CXCL5对CAL-62细胞增殖、迁移和侵袭以及CXCR2/ERK信号通路的影响。结果敲减E2F7抑制CAL-62细胞体外增殖、迁移和侵袭及体内肿瘤生长。CXCL5启动子存在E2F7的结合位点,敲减E2F7降低了CXCL5启动子的荧光素酶活性。在敲减E2F7的基础上过表达CXCL5逆转了敲减E2F7对CAL-62细胞体外增殖、迁移和侵袭的抑制作用。在敲减E2F7的基础上过表达CXCL5还逆转了敲减E2F7对CAL-62细胞CXCR2/ERK信号通路激活的抑制作用。结论E2F7能够促进未分化甲状腺癌细胞体外增殖、迁移、侵袭和体内肿瘤生长,其机制可能与促进CXCL5转录介导的CXCL5/CXCR2/ERK信号通路的激活有关。Objective To explore the effect of transcription factor E2F7 on the proliferation,migration,invasion,and tumor growth of anaplastic thyroid cancer(ATC)cells in vitro and to elucidate the underlying mechanisms.Methods Lentivirus transfection was used for a stable E2F7 knockdown in CAL-62 cells,and real-time PCR was used to detect E2F7 expression in these cells to verify the transfection efficiency.CAL-62 cells were divided into sh-NC and sh-E2F7 groups,and cell proliferation was measured using the CCK-8 assay,whereas cell migration and invasion abilities were measured using the Transwell assay.CAL-62 cells were subcutaneously injected into nude mice to observe tumor growth.The EPD website predicted an E2F7 binding site on the CXCL5 promoter,and the dual-luciferase reporter gene assay measured the effect of E2F7 knockdown on the luciferase activity of the CXCL5 promoter.The impact of E2F7 knockdown on CXCL5 levels in CAL-62 cells was assessed through real-time PCR and ELISA.Further,CAL-62 cells were divided into sh-E2F7+vector and sh-E2F7+CXCL5 groups to study the effects of CXCL5 overexpression on cell proliferation,migration,invasion,and the CXCR2/ERK signaling pathway following E2F7 knockdown.Results E2F7 knockdown inhibited CAL-62 cell proliferation,migration,and invasion in vitro and tumor growth in vivo.The CXCL5 promoter has an E2F7 binding site,and E2F7 knockdown reduced the luciferase activity of the CXCL5 promoter.CXCL5 overexpression reversed the inhibitory effect of E2F7 knockdown on cell proliferation,migration,invasion,and the CXCR2/ERK signaling pathway in CAL-62 cells.Conclusion E2F7 promotes ATC cell proliferation,migration,invasion,and tumor growth in vitro by activating the CXCL5/CXCR2/ERK signaling pathway mediated by CXCL5 transcription.

关 键 词：E2F7 未分化甲状腺癌 CXCL5/CXCR2/ERK信号通路 增殖 迁移和侵袭 肿瘤生长 

分 类 号：R736.1[医药卫生—肿瘤]