靶向逆转NM23对非小细胞肺癌放疗敏感性的影响及其可能机制-现代医学

靶向逆转NM23对非小细胞肺癌放疗敏感性的影响及其可能机制

单位：1. 新疆医科大学第一附属医院核医学科, 新疆乌鲁木齐 830054;
2. 新疆医科大学附属肿瘤医院核医学科, 新疆乌鲁木齐 830011;
3. 新疆医科大学附属肿瘤医院超声科, 新疆乌鲁木齐 830011

分类号：R734.2

出版年·卷·期（页码）：2019·38·第十期（1210-1214）

摘要：

目的：分析靶向逆转核苷二磷酸激酶1（NM23）对非小细胞肺癌（NSCLC）放疗敏感性的影响及其可能机制。方法：将NSCLC细胞株A549分为对照组和实验组两组，对照组仅予照射处理，实验组在过表达NM23重组质粒转染A549后再予照射处理；用克隆形成实验检测各组细胞集落形成；用实时荧光PCR检测各组NM23 mRNA表达，蛋白质印迹法检测各组磷脂酰肌醇3-激酶（PI3K）和蛋白激酶B（AKT）蛋白表达。结果：与对照组比较，实验组平均致死剂量（MLD）值和2 Gy照射后的细胞存活分数（SF2）值均明显降低（P<0.05），各剂量存活率明显降低，各剂量NM23 mRNA表达水平明显增高，各剂量PI3K和AKT蛋白相对表达水平明显降低（P<0.05），对照组和实验组分别在4 Gy和2 Gy时以上变化最明显。结论：靶向逆转NM23可增强NSCLC放疗敏感性，与PI3K/AKT/mTOR信号通路相关。

Objective:To analyze the effect of targeted reversal of nucleoside diphosphate kinase 1(NM23) on radiosensitivity of non-small cell lung cancer(NSCLC) and to explore its possible mechanism.Methods:NSCLC A549 cells were divided into control group and experimental group. In the control group A549 cells were given irradiation treatment. In the experimental group, A549 cells were irradiated after the over-expressed NM23 recombinant plasmid was transfected into them. The colony formation was detected by colony formation assay. The expression of NM23 mRNA was detected by real-time fluorescent PCR. The expression of phosphatidylinositol 3-kinase(PI3K) and protein kinase B(AKT) was detected by Western blotting.Results:Compared with the control group, the MLD value and SF2 value of the experimental group were significantly decreased(P<0.05). Compared with the control group, the survival rate of each dose in the experimental group was significantly decreased, and the expression level of NM23 mRNA was significantly increased at each dose. The relative expression levels of PI3K and AKT protein were significantly decreased at each dose(P<0.05). The above changes were most obvious in the experimental group at 4 Gy and 2 Gy, respectively. Conclusion:Targeted reversal of NM23 can enhance the radiosensitivity of non-small cell lung cancer,which is associated with PI3K/AKT/mTOR signaling pathway.

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