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CHD4调控端粒功能促进宫颈癌HeLa细胞生长的机制研究.pdf

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1、天津医药 2023 年 9 月第 51 卷第 9 期物标志物,在上皮细胞发生EMT期间被上调,并诱导间充质表型和运动行为19。本研究通过LC-MS/MS和免疫共沉淀实验证实Vimentin和SASH1存在相互作用。此外,本研究还发现SASH1和Vimentin在乳腺癌组织中的表达呈负相关。用慢病毒将乳腺癌细胞中的SASH1敲低,结果显示Vimentin的表达上调,表明SASH1可负性调控Vimentin的表达水平。有抑癌作用的SASH1在乳腺癌中低表达,并负性调节EMT的生物标志物Vimentin,提示两者可能在乳腺癌的发生发展中发挥重要作用。参考文献1 SUNG H,FERLAY J,SIE

2、GEL R L,et al.Global Cancer Statistics2020:GLOBOCAN estimates of incidence and mortality worldwidefor 36 cancers in 185 countries J.CA Cancer J Clin,2021,71(3):209-249.doi:10.3322/caac.21660.2 JIANG K,LIU P,XU H,et al.SASH1 suppresses triple-negativebreast cancer cell invasion through YAP-ARHGAP42-a

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13、29(1):228-238.doi:10.1111/cns.13998.18 宋双龙,王石.波形蛋白的结构与功能及其在肿瘤中的研究进展 J.中国实验诊断学,2022,26(8):1238-1243.SONG S L,WANG S.The structure and function of Vimentin and its researchprogress in tumor J.Chin J Lab Diagn,2022,26(8):1238-1243.doi:10.3969/j.issn.1007-4287.2022.08.040.19 CHEN K,LIU S,Li Y,et al.Vime

14、ntin as a potential target fordiverse nervous system diseasesJ.Neural Regen Res,2023,18(5):969-975.doi:10.4103/1673-5374.355744.(2023-01-13收稿2023-04-25修回)(本文编辑李鹏)CHD4调控端粒功能促进宫颈癌HeLa细胞生长的机制研究王倩倩,李婷芳,王峰摘要:目的探讨染色质域解旋酶DNA结合蛋白4(CHD4)通过调控端粒功能对宫颈癌HeLa细胞增殖、迁移的影响。方法慢病毒感染构建CHD4稳定敲低的宫颈癌HeLa细胞系,实时荧光定量PCR(qPCR)和

15、Western blot分别检测CHD4的mRNA和蛋白表达水平;将宫颈癌HeLa细胞分为对照组、shCDH4-1组、shCHD4-2组,CCK-8实验检测CHD4对HeLa细胞增殖能力的影响;集落形成实验检测细胞的集落数量;划痕愈合实验检测细胞迁移能力;裸鼠荷瘤实验观察移植瘤生长情况;免疫荧光-荧光原位杂交技术检测CHD4与HeLa细胞中端粒的共定位及各组细胞中端粒的损伤情况,端粒损伤以损伤因子H2AX与端粒的共定位表示;中期染色体-荧光原位杂交技术检测各组细胞中端粒功能的变化,端粒信号缺失(SFE)或多端粒信号(MTS)的染色体比例升高代表端粒功能障碍。结果慢病毒感染成功构建CHD4稳定下

16、调的HeLa细胞系(P0.05)。与对照组相比,shCDH4-1组和shCHD4-2组的细胞增殖能力、集落形成能力、迁移能力、体内肿瘤生长能力均明显下降(P0.05)。免疫荧光-荧光原位杂交实验表明,CHD4定位于HeLa细胞的端粒上。与对照组相比,CHD4的缺失不足以引起端粒的DNA损伤(P0.05),但会导致HeLa细胞SFE的染色体比例明显增多(P0.05)。结论CHD4可通过调控HeLa细胞的端粒功能,促进宫颈癌细胞的增殖和迁移。关键词:HeLa细胞;端粒;宫颈肿瘤;细胞增殖;染色质域解旋酶DNA结合蛋白4中图分类号:R737.33文献标志码:ADOI:10.11958/20222091Study on the mechanism of CHD4 regulating telomere function to promote cervical cancerHeLa cell proliferationWANG Qianqian,LI Tingfang,WANG FengSchool of Basic Medical Sciences,Tianjin Medical Univer

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