Page 17 - 《南京医科大学学报(自然科学版)》2025年第9期
P. 17
第45卷第9期 南京医科大学学报(自然科学版)
2025年9月 Journal of Nanjing Medical University(Natural Sciences) ·1229 ·
·专题研究:肿瘤·
circ_0003633对肺腺癌细胞奥希替尼耐药的作用研究
张 鸽,陈 昕,顾婧瑶,王朝霞 *
南京医科大学第二附属医院肿瘤科,江苏 南京 210011
[摘 要] 目的:探究circ_0003633在肺腺癌细胞奥希替尼耐药中的作用。方法:通过对奥希替尼耐药细胞和敏感细胞进行
circRNA测序,筛选出在耐药细胞中显著高表达的circ_0003633,在奥希替尼耐药细胞中敲低circ_0003633的表达,通过CCK⁃8
实验、Transwell和集落形成实验研究circ_0003633在肺腺癌奥希替尼耐药细胞中的作用,利用RNA pulldown、转录组测序及生
信分析筛选下游靶基因及信号通路。结果:circ_0003633在奥希替尼耐药细胞中显著高表达,敲低circ_0003633的表达可以显
著增加奥希替尼耐药细胞对奥希替尼的敏感性,circ_0003633可以与RNA结合蛋白hnRNPA1结合并调控下游靶基因ALDOC
发挥生物学功能。结论:circ_0003633在奥希替尼耐药细胞中显著高表达,与hnRNPA1结合并调控下游靶基因ALDOC,激活
PI3K/AKT信号通路,促进肺腺癌细胞对奥希替尼的耐药,可作为逆转耐药的潜在靶点。
[关键词] 肺腺癌;奥希替尼耐药;circRNA
[中图分类号] R734.2 [文献标志码] A [文章编号] 1007⁃4368(2025)09⁃1229⁃13
doi:10.7655/NYDXBNSN250504
Role of circ_0003633 in osimertinib resistance in lung adenocarcinoma cells
ZHANG Ge,CHEN Xin,GU Jingyao,WANG Zhaoxia *
Department of Oncology,the Second Affiliated Hospital of Nanjing Medical University,Nanjing 210011,China
[Abstract] Objective:To explore the role of circ_0003633 in osimertinib resistance of lung adenocarcinoma cells. Methods:By
performing circRNA sequencing on osimertinib ⁃ resistant and sensitive cells,circ_0003633 was identified as significantly highly
expressed in the resistant cells. The expression of circ_0003633 was knocked down in osimertinib ⁃ resistant cells,and its role in
osimertinib⁃resistant lung adenocarcinoma cells was investigated through CCK⁃8 assay,Transwell assay and colony formation assay.
RNA pulldown assay,transcriptome sequencing and bioinformatics analysis were used to screen downstream target genes and signaling
pathways. Results:circ_0003633 was significantly highly expressed in osimertinib ⁃ resistant cells. Knockdown of circ_0003633
enhanced the sensitivity of resistant cells to osimertinib. circ_0003633 bound to RNA⁃binding protein hnRNPA1 and regulated the
downstream target gene ALDOC to exert its biological functions. Conclusion:circ_0003633 is highly expressed in osimertinib ⁃
resistant cells,binds to hnRNPA1,and regulates the downstream target gene ALDOC,thereby activating the PI3K/AKT signaling
pathway to promote the resistance of lung adenocarcinoma cells to osimertinib. It may serve as a potential therapeutic target for
reversing drug resistance.
[Key words] lung adenocarcinoma;osimertinib resistance;circRNA
[J Nanjing Med Univ,2025,45(09):1229⁃1241]
[2]
在我国,肺癌的发病率和病死率均居于恶性肿 是所占比例最高的组织亚型 。奥希替尼,一种第
瘤首位 ,其中肺腺癌(lung adenocarcinoma,LUAD) 3 代、不可逆的表皮生长因子受体(epidermal growth
[1]
factor receptor,EGFR)⁃酪氨酸激酶抑制剂(tyrosine
[基金项目] 国家自然科学基金(82072591);江苏省卫生健
kinase inhibitor,TKI),选择性抑制 EGFR 敏感突变
康委面上项目(H2023013);南京医科大学科技发展基金
和 T790M 耐药突变,已被推荐为 LUAD 的标准疗
(NMUB20240004)
[3]
法 。FLAURA 试验证明,相比第 1 代 EGFR⁃TKI,
∗
通信作者(Corresponding author),E⁃mail:wangzhaoxia@njmu.
edu.cn(ORCID:0000⁃0002⁃1893⁃371X) 奥希替尼显著延长了EGFR突变阳性的晚期肺癌患

