lncRNA PCED1B-AS1通过靶向FUS调控MAPK信号通路并影响甲状腺乳头状癌细胞生物学功能  

lncRNA PCED1B-AS1 targets FUS to regulate MAPK signaling pathway and affects biological functions of papillary thyroid carcinoma cells

作　　者：许晶晶 张峰源 李家政 李眯 梁嘉辉 陈盛霞 XU Jingjing;ZHANG Fengyuan;LI Jiazheng;LI Mi;LIANG Jiahui;CHEN Shengxia(Department of Laboratory Medicine,School of Medicine,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学医学院检验医学系,江苏镇江212013

出　　处：《中国病理生理杂志》2024年第11期2022-2030,共9页Chinese Journal of Pathophysiology

基　　金：科技部基础平台项目(No.2019-194-30)。

摘　　要：目的:探讨长链非编码RNA PCED1B反义链1(long noncoding RNA PCED1B antisense strand 1,lncRNA PCED1B-AS1)对甲状腺乳头状癌(papillary thyroid carcinoma,PTC)细胞增殖、迁移、侵袭与凋亡的影响及作用机制。方法:体外培养人PTC细胞,RT-qPCR检测PCED1B-AS1和肉瘤融合蛋白(fused in sarcoma,FUS)的表达情况;Transwell检测敲减/过表达PCED1B-AS1与FUS对PTC细胞迁移与侵袭的影响;CCK-8和平板克隆实验分析敲减PCED1B-AS1或过表达FUS对PTC细胞增殖的影响;流式细胞术测定敲减PCED1B-AS1对PTC细胞凋亡的影响;生物信息学和RNA免疫沉淀(RNA immunoprecipitation,RIP)实验确定PCED1B-AS1和FUS的靶向结合;荧光原位杂交实验验证PCED1B-AS1和FUS是否存在共定位;Western blot检测丝裂原活化蛋白激酶(mitogen-activated pro⁃tein kinase,MAPK)信号通路相关蛋白的表达。结果:(1)与正常甲状腺细胞Nthy-ori3-1相比,PTC细胞PCED1BAS1表达水平显著升高,FUS表达水平显著降低(P<0.05);(2)敲减PCED1B-AS1与过表达FUS均抑制细胞迁移、侵袭和增殖,促进细胞凋亡(P<0.05);(3)生物信息学分析和RIP验证了PCED1B-AS1与FUS存在靶向结合(P<0.05);(4)PCED1B-AS1和FUS在细胞质中存在共定位;(5)抑制PCED1B-AS1降低MAPK家族蛋白p-ERK1/2、p-JNK和p-P38水平(P<0.05)。结论:lncRNA PCED1B-AS1可抑制甲状腺乳头状癌细胞增殖、迁移与侵袭,促进其凋亡,其机制可能与FUS的表达及MAPK信号通路有关。AIM:To investigate the effects and mechanism of long noncoding RNA PCED1B antisense strand 1(lncRNA PCED1B-AS1)on the proliferation,migration,invasion and apoptosis of papillary thyroid carcinoma(PTC)cells.METHODS:Human PTC cells were cultured in vitro.The expression of PCED1B-AS1 and fused in sarcoma(FUS)was measured by RT-qPCR.The effects of knockdown/overexpression of PCED1B-AS1/FUS on the migration and invasion of PTC cells were detected via Transwell assay.The effects of knockdown/overexpression of PCED1B-AS1/FUS on PTC cell proliferation were analysed via CCK-8 and plate colony assay.The effect of knockdown PCED1B-AS1 on PTC cell apoptosis was determined by flow cytometry.The target binding of PCED1B-AS1 and FUS was determined with bioinformatics and RNA immunoprecipitation(RIP)experiments.Fluorescence in situ hybridization experiment was performed to verify whether PCED1B-AS1 colocalises with FUS.The mitogen-activated protein kinase(MAPK)signaling pathway-related proteins were detected via Western blot.RESULTS:(1)PCED1B-AS1 expression was significantly higher and FUS expression was significantly lower in PTC cells compared with normal thyroid Nthy-ori3-1 cell(P<0.05).(2)Knockdown of PCED1B-AS1 and overexpression of FUS inhibited PTC cell migration,invasion and proliferation,and promoted apoptosis(P<0.05).(3)Bioinformatics analysis and RIP assay verified the existence of targeted binding of PCED1B-AS1 to FUS(P<0.05).(4)PCED1B-AS1 and FUS colocalised in the cytoplasm.(5)Inhibition of PCED1B-AS1 decreased the expression of MAPK signaling pathway-related proteins p-ERK 1/2,p-JNK and p-P38(P<0.05).CONCLUSION:lncRNA PCED1B-AS1 inhibits the proliferation,migration and invasion,and promotes the apoptosis of PTC cells,and its mechanism may be related to the expression of FUS and the MAPK signaling pathway.

关 键 词：甲状腺乳头状癌细胞 长链非编码RNA PCED1B反义链1 肉瘤融合蛋白 MAPK信号通路 

分 类 号：R363.2[医药卫生—病理学] R736.1[医药卫生—基础医学] R730.23