非小细胞肺癌顺铂化疗耐药相关微RNA的筛选及鉴定

 目的　探讨肿瘤细胞微RNA（miRNA）对化疗药物敏感性的作用。方法　通过miRNA芯片技术检测顺铂（DDP）耐药细胞株A549／DDP与非耐药细胞株A549的miRNA表达的差异,利用荧光定量聚合酶链反应（PCR）技术验证相应miRNA的表达情况,通过在细胞株中抑制或过表达目标miRNA,研究其对细胞化疗药物敏感性的影响。结果　A549／DDP细胞对DDP的耐药为A549细胞的18倍。A549／DDP细胞与A549细胞存在51个表达水平差异在4倍以上的miRNA,其中24个表达上调,27个表达下调。PCR进一步证实miR-376c、miR-31、miR-29a、miR-221在A549／DDP细胞中显著上调,miR-196a、miR-20a、miR-20b、miR-17、miR-451在A549／DDP细胞中显著下调。在提高A549／DDP细胞中miR-17的表达后,细胞对DDP的敏感度增加了11.7 %,提高miR-451的表达或者抑制miR-29a的表达后,对DDP的敏感度分别下降了15.5 %、12.9 %,抑制miR-376c、miR-31、miR-221或过表达miR-196a、miR-20a、miR-20b均不影响A549／DDP细胞对DDP的敏感度。结论　非小细胞肺癌DDP耐药细胞与非耐药细胞的miRNA表达谱有差异,miRNA参与肺癌化疗耐药,miR-17具有逆转非小细胞肺癌DDP耐药的潜力。     

循环miR-29a和miR-150与非小细胞肺癌胸部放射治疗剂量的相关性

目的:探讨非小细胞肺癌（non-small cell lung cancer,NSCLC）胸部放射治疗剂量与循环血miR-29a和miR-150的相关性。方法:收集56例2014年1月至2015年12月在我院接受放射治疗的诊断为NSCLC的患者,其中5例NSCLC患者在0、20、40、60 Gy辐照后用miRNA芯片检测循环血miRNA表达差异;51例NSCLC患者在0、20、40 Gy辐照后用实时定量PCR验证循环血中候选miRNA表达;医用直线加速器（2 Gy/天,连续处理3天）辐照A549和MRC5细胞,实时定量PCR检测细胞内和细胞上清外泌体miR-29a和miR-150的表达。结果:miRNA芯片筛选出随着患者放疗剂量的增加而差异表达的10个miRNA（miR-29a、miR-150、miR-142、miR-342、miR-125b、miR-101、miR-425、miR-338、miR-126、miR-15b）。验证发现验证组患者0、20、40 Gy辐照后循环血miR-29a和miR-150表达具有统计学差异（P<0.05）。验证组循环miR-29a和miR-150分别与V5、V20、MLD、Mean Eso呈负相关。A549及MRC5细胞辐照3天后细胞内miR-29a和miR-150表达显著增加（P<0.05）,细胞上清外泌体中表达显著下降（P<0.05）。结论:循环血miR-29a和miR-150与NSCLC胸部放射治疗剂量相关。     

MicroRNA-451 functions as a tumor suppressor in human non-small cell lung cancer by targeting ras-related protein 14 (RAB14)

Accumulating evidence suggests that microRNAs (miRNAs) are important gene regulators, which can have critical roles in diverse biological processes including tumorigenesis. In this study, we analyzed the miRNA expression profiles in non-small cell lung carcinoma (NSCLC) by use of a miRNA microarray platform and identified 40 differentially expressed miRNAs. We showed that miRNA (miR)-451 was the most downregulated in NSCLC tissues. The expression level of miR-451 was found to be significantly correlated with tumor differentiation, pathological stage and lymph-node metastasis. Moreover, low miR-451 expression level was also correlated with shorter overall survival of NSCLC patients (P<0.001). Ectopic miR-451 expression significantly suppressed the in vitro proliferation and colony formation of NSCLC cells and the development of tumors in nude mice by enhancing apoptosis, which might be associated with inactivation of Akt signaling pathway. Interestingly, ectopic miR-451 expression could significantly inhibit RAB14 protein expression and decrease a luciferase-reporter activity containing the RAB14 3'-untranslated region (UTR). In addition,, RNA interference silencing of RAB14 gene could recapitulate the tumor suppressor function of miR-451, whereas restoration of RAB14 expression could partially attenuate the tumor suppressor function of miR-451 in NSCLC cells. Furthermore, we also showed that strong positive immunoreactivity of RAB14 protein was significantly associated with downregulation of miR-451 (P=0.01). These findings suggest that miR-451 regulates survival of NSCLC cells partially through the downregulation of RAB14. Therefore, targeting with the miR-451/RAB14 interaction might serve as a novel therapeutic application to treat NSCLC patients.     

肺癌缺氧A549细胞的microRNA芯片表达谱分析

目的:研究缺氧对肺腺癌A549细胞中microRNA表达谱的影响,分析靶基因参与的生物学功能和通路。方法:基于miRNA芯片技术和生物信息学分析方法,分析缺氧条件和正常氧条件下培养的A549细胞中差异表达的miRNA,并预测这些miRNA的靶基因,分析靶基因参与的生物学功能和通路。结果:本研究共筛选出14个差异表达miRNA,包括9个在缺氧细胞中上调miRNA和5个下调miRNA。上调和下调miRNA的靶基因都参与DNA转录、核染色质修饰等功能,并且都参与Wnt信号、TGF-β信号和MAPK信号通路。结论:缺氧的肺腺癌A549细胞中miRNA表达谱发生了显著改变,差异表达miRNA对某些基因具有调控作用。     

MicroRNA-378 is associated with non-small cell lung cancer brain metastasis by promoting cell migration, invasion and tumor angiogenesis

Lung cancer is the leading cause of cancer deaths in the world. Brain metastasis (BM) can affect about 25% of non-small cell lung cancer (NSCLC) patients during their lifetime. Efforts to characterize patients that will develop BM have been disappointing. MicroRNAs (miRNAs) play a role in regulating a variety of targets and, consequently, multiple pathways, which make them a powerful tool for early detection of disease, risk assessment and prognosis. In this study, using RT-PCR and further northern blot validation, we confirmed that miR-378 was significantly differentially expressed in the matched NSCLC from 8 patients with BM and 21 without BM. Our study showed evidences that miR-378 is associated with non-small cell lung cancer brain metastasis by promoting cell migration, invasion and tumor angiogenesis. MiR-378 may be a potential biomarker for characterizing non-small cell lung cancer brain metastasis and assisting clinicians in stratifying the high-risk patients on a clinical trial for either prophylactic cranial irradiation or a new intervention that may mitigate BM development, ultimately leading to a new standard of care for NSCLC patients.     

miR-32-5p通过靶向Dickkopf相关蛋白3的表达调控乳腺癌MDA-MB-231 细胞的生物学行为

目的：通过生物信息学手段筛选乳腺癌中差异表达的关键miRNA及其靶基因,干预其在乳腺癌细胞中的表达并观察对乳腺癌细胞功能的影响。方法：利用GEO数据库筛选在乳腺癌中差异表达的miRNA,ENCORI数据库验证差异miRNA的表达,以选定最显著的差异表达 miRNA 为研究对象;利用 Starbase、miRDB 和 miRWalk 数据库预测 miR-32-5p 的靶基因,利用DAVID数据库对靶基因进行GO分析和KEGG分析,利用String数据库联合Cytoscape3.6.2软件进行PPI网络分析及核心基因的筛选,从核心基因中选择相互联系紧密“度值”最显著的Dickkopf相关蛋白3（DDK3）基因进行后续实验。qPCR检测miR-32-5p在人正常乳腺细胞 MCF10A和人乳腺癌细胞MCF7、MDA-MB-231、MDA-MB-453细胞中的表达。向MDA-MB-231细胞中转染miR-32-5p mimic、miR-32-5p inhibitor及各自的对照（NC）序列,分别用CCK-8法、流式细胞术和Transwell实验检测过表达或抑制miR-32-5p对细胞增殖、凋亡和侵袭的影响。结果：从GEO数据库中获取的两个数据集共识别出两个差异miRNA,ENCORI数据库验证差异miRNA的表达发现miR-32-5p的表达水平与GEO数据库的结果一致,故选择其进行研究;预测得到198个miR-32-5p 潜在的靶基因并鉴定出 10 个核心基因（DKK3、WNT2B、SFRP5、SFRP2、SFRP1、LRP6、WNT6、KREMEN1、NEDD4L、TRIP12）,其中DKK3的度值最大可能在乳腺癌中较为重要,于是选择miR-32-5p/DKK3轴进行后续研究。miR-32-5p在3种乳腺癌细胞中的表达水平显著高于正常乳腺细胞（均P<0.01）,其中以MDA-MB-231细胞中表达最高。双荧光素酶基因报告实验验证了miR-32-5p与DKK3基因的靶向结合及其对后者表达的负向调控。转染miR-32-5p mimic、miR-32-5p inhibitor后成功提高或抑制了MDA-MB-231细胞中miR-32-5p的表达。与对照组相比,过表达miR-32-5p可抑制MDA-MB-231细胞的凋亡而促进细胞增殖和侵袭（P<0.05或P<0.01）,敲低miR-32-5p则起相反的作用（均P<0.01）。结论：miR-32-5p/DKK3轴可能是影响乳腺癌发生发展的关键通路,过表达miR-32-5p能够抑制乳腺癌MDA-MB-231细胞的凋亡而促进细胞增殖和侵袭。     

miR-155在非小细胞肺癌组织和细胞中的表达及对细胞增殖、迁移、侵袭的影响

目的:探讨miR-155在非小细胞肺癌（NSCLC）中的表达及其对NSCLC细胞增殖、迁移、侵袭的影响机制。方法:通过生物信息学网站预测miR-155的可能靶基因,双荧光素酶报告基因实验进行验证;采用qRT-PCR测定NSCLC组织及细胞中miR-155和ZIC3的表达;通过LipofectamineTM2000试剂盒向A549细胞中分别转染miR-155 mimic和mimic NC,共转染miR-155 mimic+pMIR-ZIC3;Western blot检测转染miR-155 mimic对ZIC3蛋白表达的影响;MTT法、划痕实验及Transwell侵袭实验分别检测miR-155对A549细胞增殖、迁移及侵袭的影响。结果:生物信息学网站预测显示ZIC3-3' UTR与miR-155存在结合位点,双荧光素酶报告基因实验验证ZIC3是miR-155的靶基因,ZIC3表达受miR-155的负向调控。NSCLC组织及细胞中miR-155显著低表达,ZIC3显著高表达（P＜0.05）;过表达miR-155抑制了ZIC3蛋白的表达水平（P＜0.05）。转染miR-155 mimic显著抑制NSCLC细胞的增殖、迁移及侵袭能力（P＜0.01）;共转染miR-155 mimic+pMIR-ZIC3逆转了miR-155 mimic对NSCLC细胞增殖、迁移及侵袭的抑制作用（P＜0.05）。结论:NSCLC中miR-155显著低表达,其过表达可抑制NSCLC细胞的增殖、迁移及侵袭;miR-155可能通过靶向负调控ZIC3影响NSCLC细胞的生物学行为。     

Upregulation of miR-136 in human non-small cell lung cancer cells promotes Erk1/2 activation by targeting PPP2R2A

MicroRNAs (miRNAs) have been integrated into cancer development and progression, because they repress translation of target genes which can be tumor suppressors and oncogenes. A number of miRNAs have been found to be closely related to human non-small cell lung cancer (NSCLC). However, the roles of miR-136 in NSCLC are still largely unknown. Here, we show that miR-136 is significantly upregulated in human NSCLC primary tumors and cell lines compared to their nontumor counterparts. Suppression of miR-136 expression in NSCLC cell line A549 inhibited both anchorage-dependent and anchorage-independent proliferation. Further studies showed that suppression of miR-136 expression attenuated phosphorylation of extracellular-signal-regulated kinase 1/2 (Erk1/2). We found that serine/threonine protein phosphatase 2A 55 kDa regulatory subunit B α isoform (PPP2R2A, also known as B55α) was a direct target of miR-136, and suppression of miR-136 expression led to a robust increase in both mRNA and protein levels of PPP2R2A. We found that miR-136 promoted phosphorylation of Erk1/2 through inhibition of PPP2R2A expression, and forced overexpression of PPP2R2A abrogated promotion of Erk1/2 phosphorylation by miR-136. Moreover, forced overexpression of PPP2R2A abrogated the promoting effect of miR-136 on cell growth and led to a reduced growth rate of NSCLC cells. Our findings indicate that miR-136 promotes Erk1/2 phosphorylation through targeting PPP2R2A in NSCLC cells and suggest that it may serve as a therapeutic target in NSCLC therapy.     

miR-203a-3p 在胰腺癌组织与细胞中的表达及其对 BxPC-3 细胞增殖、 迁移和侵袭的影响

目的：探讨miR-203a-3p对胰腺癌BxPC-3细胞增殖、迁移和侵袭能力的影响。方法：运用癌症基因组图谱（TCGA） 数据库筛选胰腺癌组织和癌旁组织中差异表达的miRNA,分析miRNA高表达与低表达时胰腺癌患者的生存率和临床分期;利用 TarBase数据库分析miRNA与癌症相关的GO功能与KEGG通路,利用DIANA Tools、miRDB和TargetScan网站预测miR-203a-3p 的靶基因。将miR-203a-3p mimic及NC mimic、miR-203a-3p inhibitor及NC inhibitor转染至BxPC-3细胞,用qPCR法检测胰腺癌 细胞和胰腺正常上皮细胞HPNE中miR-203a-3p、miR-192-5p和miR-451a表达水平,以CCK-8法、Transwell小室法和克隆形成实 验分别检测BxPC-3细胞的增殖、迁移、侵袭和集落形成能力。结果：通过TCGA数据库筛选出18个胰腺癌组织中差异表达的 miRNA,其中miR-203a-3p、miR-192-5p、miR-451a具有物种保守性 ,且其与胰腺癌临床癌症分期、细胞周期和患者生存率相 关（均P<0.05）;生物信息学网站预测显示miR-203a-3p的候选靶基因是PPM1A,PPM1A与多基因存在相互作用。miR-203a-3p、 miR-192-5p和miR-451a在BxPC-3和Aspc-1细胞中均高表达（均P<0.01）。miR-203a-3p mimic组BxPC-3细胞中miR-203a-3p表 达水平以及细胞增殖、迁移和侵袭能力均显著提高（均P<0.01）：miR-203a-3p inhibitor组细胞中miR-203a-3p表达水平以及细胞 增殖、迁移和侵袭能力均显著降低（均P<0.01）。结论：miR-203a-3p在胰腺癌组织及细胞中均高表达,其表达与患者生存和临床 分期相关,可调控BxPC-3细胞的增殖、迁移和侵袭能力。     

Expression levels of microRNA-145 and microRNA-10b are associated with metastasis in non-small cell lung cancer

Although metastasis remains the overwhelming cause of death for patients with non-small cell lung cancer (NSCLC), the underlying mechanisms of metastasis remain unknown. Accumulating evidence suggests that microRNAs (miRNAs) are key players in the regulation of tumor cell invasion and metastasis. Expression of miR-9, miR-10b, miR-145, and miR-155, 4 miRNAs previously shown to play roles in metastasis in other tumor types, was compared in lymph node (LN)-positive NSCLC versus LN-negative NSCLC. Expression of miR-145 was significantly lower in LN-positive NSCLC (P < 0.05), while expression of miR-10b was significantly higher (P < 0.05). Expression of both miR-145 and miR-10b was correlated with lymph node metastasis in NSCLC (both Ps < 0.001). In addition, miR-10b facilitated the migration and invasion of lung cancer cell line A549, while miR-145 suppressed the migration and invasion capacity of A549 in vitro. These results suggest that miR-10b and miR-145 may act as an oncogene or tumor suppressor gene, respectively, in NSCLC metastasis.     

肺癌转移相关microRNA miR-29b的生物信息学分析*

目的: 应用生物信息学分析A549细胞中在CD133阳性低表达的miR-29b的靶基因及其功能,为以miR-29b为靶点的肿瘤研究提供线索。 方法: 利用miRNA PCR芯片筛选A549细胞中CD133阳性和CD133阴性差异表达的miRNA,选用miRecords预测miR-29b的靶基因,合并已证实的靶基因,利用GOEAST和DAVID数据库对所得靶基因进行功能富集分析和信号转导通路富集分析。 结果: A549细胞中与CD133阴性比较,miR-29b在CD133阳性中表达下调。miR-29b靶基因有106个,其靶基因功能富集于结合和细胞外基质形成等作用（P<0.01）;信号转导通路显著富集于JAK-STAT和TGF-β等信号转导通路（P<0.05）。 结论: miR-29b可能与肺癌转移相关,miR-29b的靶基因显著富集在与肿瘤相关的信号通路中。      

Upregulation of microRNA-451 increases cisplatin sensitivity of non-small cell lung cancer cell line (A549)

Background

Recently, miR-451 as a tumor suppressor has been reported in other studies. However, whether miR-451 can affect the sensitivity of non-small cell lung cancer (NSCLC) cells to cisplatin (DDP) remains unclear. The aim of this study is to evaluate the roles of miR-451 in the sensitivity of NSCLC cells to DDP.

Methods

Quantitative RT-PCR assay was performed to detect the expression of miR-451 in 10 pairs of NSCLC and noncancerous tissue samples. pcDNA-GW/EmGFP-miR-451 was stably transfected into NSCLC cell line (A549). Then, the effects of miR-451 upregulation on growth, colony formation and apoptosis of A549 cells were investigated. Finally, the effects of miR-451 upregulation on in vitro and in vivo sensitivity of A549 cells of DDP were also determined.

Results

The level of miR-451 expression in NSCLC tissues was significantly higher than that in corresponding noncancerous tissues. Ectopic overexpression of miR-451 could significantly inhibit growth and induce apoptosis of A549 cells. Moreover, ectopic overexpression of miR-451 could sensitize A549 cells to DDP possibly by increasing DDP-induced apoptosis which might be associated with the inactivation of Akt signaling pathway.

Conclusions

This study demonstrated for the first time that combination of DDP application with miR-451 upregulation might be a potential strategy for the treatment of human NSCLC.     

miR-492对非小细胞肺癌细胞迁移及侵袭能力的影响

目的:探讨miR-492对非小细胞肺癌（non-small cell lung cancer，NSCLC）细胞迁移和侵袭能力的影响，并探讨其可能的作用机制。方法:RT-qPCR检测NSCLC组织及细胞株（Calu-1、A549、H1650和H1299）中miR-492的表达。A549细胞瞬时转染miR-492 mimics或miR-492 inhibitors，并通过划痕实验及Transwell实验检测细胞的迁移及侵袭能力。双荧光素酶实验证实miR-492调控的靶基因。结果:NSCLC组织及细胞株中miR-492表达明显升高。将miR-492 mimics转染A549细胞后，细胞的迁移和侵袭能力明显增强。将miR-492 inhibitors转染A549细胞后，细胞的迁移和侵袭能力明显减弱。PTPN9是miR-492的直接靶基因。结论:miR-492可能通过调节靶基因PTPN9，从而促进NSCLC细胞的迁移和侵袭。     

lncRNASNHG11通过吸附miR-193a-5p促进NSCLC细胞A549的恶性生物学行为

目的： 探讨lncRNA SNHG11对非小细胞肺癌（NSCLC）A549细胞增殖、侵袭和迁移的影响及其可能机制。 方法:qPCR检测人胚肺细胞HEL-1和NSCLC细胞A549、H1299、HCC827中lncRNASNHG11和miR-193a-5p的表达水平,向A549细胞中转染SNHG11小干扰RNA（si-SNHG11）、miR-193a模拟物（miR-193a mimic）或miR-193a抑制剂（miR-193a inhibitor）后,CCK-8法检测其对细胞增殖的影响,Transwell小室和细胞划痕实验检测对细胞侵袭和迁移的影响,WB法检测对细胞增殖抗原Ki67、细胞周期蛋白D1 （cyclin D1）表达的影响,双荧光素酶报告实验验证lncRNASNHG11与miR-193a-5p的靶向关系。 结果： 与人胚肺细胞HEL-1相比,NSCLC细胞A549、H1299、HCC827中lncRNA SNHG11均呈高表达、miR-193a-5p呈低表达（均P<0.05）;沉默lncRNA SNHG11可抑制A549细胞的增殖、侵袭和迁移,降低细胞中Ki67和Cyclin D1蛋白的表达水平（均P<0.05）;过表达miR-193a-5p可抑制A549细胞增殖和侵袭迁移（均P<0.05）。lncRNASNHG11可靶向吸附miR-193a-5p,抑制miR-139a-5p可部分逆转沉默lncRNA SNHG11对A549细胞增殖、侵袭和迁移的作用（均P<0.05）。 结论：lncRNA SNHG11通过吸附miR-193a-5p促进NSCLCA549细胞的增殖、侵袭和迁移。     

miR-196a调控p27kip1促进非小细胞肺癌细胞增殖的机制研究

目的 探讨miR-196a在非小细胞肺癌（NSCLC）组织及细胞系中的表达,以及抑制或过表达miR-196a对NSCLC细胞增殖能力的影响及其作用的靶基因。方法 实时定量PCR（QPCR）技术检测NSCLC组织及细胞系中miR-196a的表达水平,通过转染miR-196a inhibitors及miR-196a mimics抑制或上调miR-196a的表达水平,并通过QPCR检测转染效率。用MTT和克隆形成实验检测上调或下调miR-196a对SPC-A1或A549细胞增殖能力的影响;生物信息学及Western blotting方法分析验证miR-196a对靶基因p27kip1的调控作用。结果 与正常肺组织及细胞相比,在NSCLC组织和细胞中miR-196a的表达出现显著上调,SPC-A1细胞和A549细胞中转染miR-196a inhibitors或miR-196a mimics能显著抑制或上调miR-196a的表达;抑制miR-196a的表达能降低SPC-A1细胞增殖能力,而上调miR-196a的表达则能促进A549细胞增殖。miR-196a能够负性调控p27kip1的表达。结论NSCLC组织及细胞中miR-196a的表达上调能够抑制p27kip1的表达,并显著促进NSCLC细胞增殖,影响NSCLC的发生与发展。     

三阴性乳腺癌细胞系MDA-MB-231与其脑转移细胞系中microRNA差异表达分析

目的：分析三阴性乳腺癌（TNBC）细胞系MDA-MB-231（MB-231）与其脑转移细胞系MDA-MB-231Brm （MB-231Brm）中microRNA （miRNA）的表达差异,寻找有价值的三阴性乳腺癌脑转移相关的miRNA。方法：Trizol法提取MB-231和MB-231Brm细胞总RNA,用Illumina高通量测序技术分离并检测miRNA表达情况,将其与已知的miRNA数据库比对,采用miRDeep2软件进行新的miRNA预测;使用差异基因检测法筛选差异表达的miRNA,构建差异表达谱。应用生物信息学分析进行miRNA靶基因的功能分析,并用实时荧光定量PCR （qPCR）进行验证。结果：MB-231和MB-231Brm细胞中miRNA的种类和表达存在差异,两者共有的miRNA为961种,前者自有164种,后者自有196种;与MB-231相比,MB-231Brm细胞的miRNA中,有145个表达显著上调,54个表达显著下调,1 122个表达未见明显差异;差异表达分析显示,与MB-231相比,MB-231Brm中的miR-199a-3p和miR-103a-3p等表达显著增加,而miR-1246和miR-4787-5p等表达显著下降;基因本体分析（GO）发现差异表达的miRNA所调控的靶基因与细胞组分、分子功能及生物过程均相关;qPCR验证发现,与MB-231相比,miR-1246在MB-231Brm中表达显著降低且差异有统计学意义（P < 0.05）。结论：MB-231和MB-231Brm中存在差异表达的miRNA,且在TNBC脑转移过程中其调控的靶基因通过参与细胞组分形成、调节分子功能及调控生物过程等发挥作用;并发现miR-1246在脑转移细胞系中的表达下降,其可能通过某种途径参与TNBC脑转移的发生、发展过程。     

17-AAG-M诱导人NSCLC-A549细胞差异表达miRNA的筛选及对放射敏感性影响

目的 筛选17-AAG-M诱导的人非小细胞肺癌(NSCLC) A549细胞在X线下差异表达miRNA并研究其对放射敏感性的影响。方法 对17-AAG-M及4Gy处理的A549细胞完成芯片筛选,公共数据库观察兴趣miRNA在肿瘤中的表达,GO及KEGG分析目标miRNA并通过qPCR验证。MTT及克隆形成实验分别检测目标miRNA在X线作用下对A549细胞存活率及克隆增殖活力的影响,单击多靶模型拟合实验方程分析放射增敏性。结果 筛选出20个差异表达miRNA,其中下调的hsa-miR-30a-3p在数据库中表现出与肺癌的密切相关性,涉及含细胞增殖在内的50个生物学过程,影响MAPK信号通路、肿瘤相关路径及细胞周期等。与17-AAG-M组相比,hsa-miR-30a-3p在17-AAG-M和X线共同作用下,相对表达量由2.42降至0.16。而hsa-miR-30a-3p抑制A549细胞存活率,并在X线作用下由78.52%下降至69.00%。上调其表达能抑制肿瘤细胞增殖,提高放射敏感性,放射增敏比为1.18。在17-AAG-M作用下上述表现更加明显。结论 A549细胞中hsa-miR-30a-3p在17-AAG-M和X线的作用下差异表达,且上调其水平能抑制细胞生长及增殖,并提高放射敏感性,联合17-AAG-M后抑制效果更显著。