安罗替尼通过调控miR-16-5p/PD-1轴抑制人非小细胞肺癌细胞系增殖并促进凋亡

Anlotinib inhibits proliferation and promotes apoptosis of human non-small cell lung cancer cell lines through miR-16-5p/PD-1 axis

目的 探讨安罗替尼对非小细胞肺癌细胞增殖和凋亡的影响及其分子机制。方法 将非小细胞肺癌细胞系A549和H1299分别采用安罗替尼、miR-16-5p激动剂和/或PD-1过表达载体进行处理。CCK-8实验和EDU实验检测细胞增殖;流式细胞术检测细胞凋亡;RT-qPCR检测miR-16-5p相对表达量;Western blot检测程序性细胞死亡-1蛋白(PD-1)的表达。双荧光素酶报告实验确定miR-16-5p和PD-1的靶向关系。用A549细胞构建裸鼠成瘤模型,检测安罗替尼对体内肿瘤生长的影响。结果 安罗替尼在A549和H1299细胞中以剂量依赖的方式显著增加miR-16-5p表达,同时降低PD-1表达,并且抑制细胞增殖,促进细胞凋亡(P<0.05)。miR-16-5p过表达可抑制细胞增殖,促进细胞凋亡(P<0.05)。miR-16-5p能靶向PD-1,且负调控PD-1表达。siRNA下调PD-1表达后明显抑制细胞增殖,并促进细胞凋亡(P<0.05)。过表达PD-1则可逆转安罗替尼介导的miR-16-5p对A549和H1299细胞的促增殖和抗凋亡作用(P<0.05)。体内实验证实,安罗替尼能够明显抑制肿瘤生长(P<0.05)。结论 安罗替尼可有效抑制非小细胞肺癌细胞增殖,促进细胞凋亡,减少体内肿瘤生长,其作用机制与miR-16-5p/PD-1信号轴相关。

Objective To investigate the effect of Anlotinib on proliferation and apoptosis in non-small cell lung cancer(NSCLC)cells and its molecular mechanism.Methods Non-small cell lung cancer cell lines A549 and H1299 were incubated with Anlotinib,miR-16-5p agonist and/or PD-1 overexpression vector respectively.CCK-8 assay and EDU assay were applied to detect the proliferation.Flow cytometry was performed to detect the cell apoptosis.The relative expression of miR-16-5 p in A549 and H1299 was detected by real-time quantitative polymerase chain reaction(RT-qPCR).The relative protein expression of PD-1 in A549 and H1299 was detected by Western blot assay.The interaction between miR-16-5p and PD-1 was determined by dual luciferase reporter assay.Finally,A549 cell xenograft model was established to assess the effect of Anlotinib on tumor growth in vivo.Results Anlotinib significantly increased miR-16-5p expression and decreased PD-1 expression in A549 cells and H1299 cells,inhibited cell proliferation and promoted apoptosis in a dose-dependent manner(P<0.05).The highly-expressed miR-16-5p inhibited proliferation and promoted cell apoptosis(P<0.05).Also,miR-16-5p targeted at PD-1 and negatively regulated PD-1 expression.Knockdown of PD-1 inhibited proliferation and promoted cell apoptosis(P<0.05).PD-1 over-expression reversed the Anlotinib-mediated pro-proliferation and anti-apoptosis of miR-16-5p in A549 cells and H1299 cells(P<0.05).Anlotinib significantly reduced tumor growth in vivo(P<0.05).Conclusions Anlotinib may inhibit cell proliferation,anti-apoptosis,and reduce tumor growth for NSCLC,which is involved in miR-16-5p/PD-1 axis.