circDCUN1D4调节miR-18a-5p/FBP1轴对肺癌细胞增殖、凋亡和免疫逃逸的影响OACSTPCD
Effect of circDCUN1D4 on proliferation,apoptosis and immune escape of lung cancer cells by regulating the miR-18a-5p/FBP1 axis
目的 探讨环状RNA(circRNA)DCUN1D4调节微小RNA(miR)-18a-5p/果糖-1,6-二磷酸酶1(FBP1)轴对肺癌细胞增殖、凋亡和免疫逃逸的影响.方法 选取人肺癌细胞系(H1975、H1650、A549、SPCA-1)和人正常肺表皮细胞(HPL-1),qRT-PCR检测各种细胞中circDCUN1D4、miR-18a-5p、FBP1 mRNA表达水平.取对数生长期的A549细胞并分为空白组、circDCUN1D4过表达质粒(circDCUN1D4)组、过表达质粒阴性对照(NC)组、circDCUN1D4+miR-18a-5p模拟物阴性对照(circDCUN1D4+mimics NC)组、circDCUN1D4+miR-18a-5p模拟物(circDCUN1D4+miR-18a-5p mimics)组.CCK-8法检测各组A549细胞活力,流式细胞术检测各组A549细胞凋亡水平,qRT-PCR检测各组A549细胞中circDCUN1D4、miR-18a-5p、FBP1 mRNA表达水平,Western blot检测各组A549细胞中FBP1、caspase-3、Ki67、增殖细胞核抗原(PCNA)及程序性死亡分子配体-1(PD-L1)表达水平,双荧光素酶实验验证miR-18a-5p分别与circDCUN1D4、FBP1的靶向关系.结果 与HPL-1细胞相比,人肺癌细胞系中circDCUN1D4、FBP1 mRNA表达显著下降(P<0.05),miR-18a-5p表达显著增加(P<0.05).miR-18a-5p分别与circDCUN1D4、FBP1存在靶向关系.与空白组、NC组相比,circDCUN1D4组细胞24 h和48 h的OD值、Ki67、PCNA、miR-18a-5p、PD-L1表达显著降低(P<0.05),细胞凋亡率、circDCUN1D4、FBP1、caspase-3表达显著增加(P<0.05);过表达miR-18a-5p逆转了circDCUN1D4对肺癌细胞恶性行为的抑制作用(P<0.05).结论 circDCUN1D4过表达可以促进肺癌细胞凋亡,抑制肺癌细胞增殖及免疫逃逸,其作用机制可能与调控miR-18a-5p/FBP1轴有关.
Objective To investigate the influences of circular RNA(circRNA)DCUN1D4 on the proliferation,apoptosis and immune escape of lung cancer cells by regulating the microRNA(miR)-18a-5p/fructose-1,6-bisphosphatase 1(FBP1)axis.Methods The human lung cancer cell lines H1975,H1650,A549 and SPCA-1 and human normal lung epidermal cells HPL-1 were selected,qRT-PCR was used to detect the expression levels of circDCUN1D4,miR-18a-5p and FBP1 mRNA in various cells.A549 cells in logarithmic growth phase were selected and divided into the blank group,circDCUN1D4 overexpression plasmid(circDCUN1D4)group,overexpression plasmid negative control(NC)group,circDCUN1D4+miR-18a-5p mimics negative control(circDCUN1D4+mimics NC)group,and circDCUN1D4+miR-18a-5p mimics group.The cell viability of each group was detected by CCK-8 method,the cell apoptosis was detected by flow cytometry,the expression levels of circDCUN1D4,miR-18a-5p and FBP1 mRNA of cells in each group were detected by qRT-PCR,the expression levels of FBP1,caspase-3,Ki67,proliferating cell nuclear antigen(PCNA)and programmed death ligand-1(PD-L1)were detected by Western blot,the targeting relationships of miR-18a-5p with circDCUN1D4 and FBP1 were verified by dual luciferase assay.Results Compared with HPL-1 cells,the mRNA expressions of circDCUN1D4 and FBP1 were significantly decreased(P<0.05),and the expression of miR-18a-5p was significantly increased(P<0.05).miR-18a-5p had targeting relationships with circDCUN1D4 and FBP1,respectively.Compared with the blank group and NC group,the OD values at 24 hours and 48 hours,and the expressions of Ki67,PCNA,miR-18a-5p and PD-L1 of cells in the circDCUN1D4 group were significantly decreased(P<0.05),and the apoptosis rate,and the expressions of circDCUN1D4,FBP1 and caspase-3 were significantly increased(P<0.05).Overexpression of miR-18a-5p reversed the inhibitory effect of circDCUN1D4 on the malignant behavior of lung cancer cells(P<0.05).Conclusion Overexpression of circDCUN1D4 can promote lung cancer cell apoptosis,inhibit lung cancer cell proliferation and immune escape,and its mechanism may be related to the regulation of miR-18a-5p/FBP1 axis.
史春辉;蔺建平;吴超
宝鸡市中医医院肿瘤科,陕西 宝鸡 721000宝鸡市中医医院呼吸与危重症医学科,陕西 宝鸡 721000西安国际医学中心医院呼吸内科,陕西 西安 710000
临床医学
circDCUN1D4miR-18a-5p/FBP1轴肺癌增殖凋亡免疫逃逸
circDCUN1D4miR-18a-5p/FBP1 axislung cancerproliferationapoptosisimmune escape
《局解手术学杂志》 2024 (001)
19-24 / 6
陕西省自然科学基础研究计划项目(S2021-JC-QN-2452)
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