miR-34a调控HMGB1表达对人膀胱癌细胞增殖的影响

目的探讨miR-34a对膀胱癌T24细胞增殖的影响。方法合成miR-34a的模拟物并转染膀胱癌T24细胞,荧光显微镜下观察转染效率,实时荧光定量PCR法检测转染48 h后,T24细胞中miR-34a的表达情况,MTT法检测转染24、48和72 h后T24细胞的增殖情况,实时荧光定量PCR法和western blot方法检测转染48 h后膀胱癌细胞内源性HMGB1 m RNA及蛋白的表达变化。结果 miR-34a的模拟物转染至T24细胞的效率为80%,转染miR-34a模拟物48 h后,T24细胞内miR-34a的表达显著升高(P0.05),T24细胞的增殖率显著低于阴性对照组(P0.05),且呈时间依赖性,HMGB1 m RNA及蛋白的表达水平明显低于阴性对照组(P0.05)。结论 miR-34a抑制膀胱癌T24细胞增殖可能与靶向HMGB1基因相关。     

miR-130a靶向调节SMAD4基因对卵巢癌SKOV3细胞增殖和侵袭的影响

目的探讨miR-130a对卵巢癌SKOV3细胞增殖及侵袭能力的影响。方法将卵巢癌SKOV3细胞分为miR-130a抑制剂组、miR-130a模拟物组和对照组,分别将miR-130a抑制剂或miR-130a模拟物转染至miR-130a抑制剂组或miR-130a模拟物组细胞,对照组细胞转染无关序列,Real-time PCR法检测各组细胞miR-130a表达水平,分别用MTT方法与Transwell细胞侵袭实验检测转染后各组SKOV3细胞的增殖与侵袭能力变化。Real-time PCR与Western blot实验分别检测各组细胞SMAD4 mRNA和蛋白表达水平。结果转染miR-130a模拟物后,SKOV3细胞miR-130a的表达水平显著升高,SKOV3细胞的增殖与侵袭能力显著降低,SMAD4 mRNA及蛋白的表达水平显著降低(P0.01);转染miR-130a抑制剂后,SKOV3细胞miR-130a的表达水平显著降低,SKOV3细胞的增殖与侵袭能力显著升高,SMAD4 mRNA及蛋白的表达水平显著升高(P0.01)。结论 miR-130a抑制卵巢癌SKOV3细胞的增殖和侵袭可能与下调SMAD4的表达相关。     

miR-152-3p 靶向TCF4 对人胃癌SGC-7901 细胞增殖和凋亡的调控作用

目的:探究miR-152-3p 对人胃癌SGC鄄7901 细胞增殖和凋亡的作用及机制。方法:用miR鄄152 类似物(miR-152 mimic) 转染细胞,RT鄄PCR 检测miR-152 及转录因子4(TCF4) 的表达;荧光素酶报告实验证明miR1523p 与TCF4 的靶 向关系;miR-152 mimic 和TCF pcDNA 重组质粒(pc鄄TCF4) 分别或同时转染细胞,Western blot 检测TCF4 的表达,CCK8 检测细 胞增殖情况;流式检测细胞凋亡情况。结果:miR152 mimic 能显著升高SGC鄄7901 细胞miR-1523p 的表达水平,降低TCF4 的 mRNA 水平;同时,miR152 mimic 还能显著降低TCF4 野生型荧光素酶活性;此外,miR-152 mimic 能显著降低SGC-7901 细胞 的增殖倍数,升高细胞凋亡率;pc-TCF4 能显著减弱miR-152 mimic 抑制SGC7901 细胞增殖及诱导细胞凋亡的作用。结论: miR-1523p 能抑制人胃癌SGC7901 细胞增殖并诱导细胞凋亡,作用机制与靶向调控TCF4 表达有关。     

miR-146a在卵巢癌组织中的表达及其对卵巢癌SKOV3细胞增殖-凋亡的影响

目的探讨miR-146a在卵巢癌组织中的表达及其对卵巢癌SKOV3细胞增殖与凋亡的影响。方法RT-qPCR检测21例卵巢癌组织及对应癌旁正常卵巢组织中miR-146a表达;将miR-146a模拟物和miR-146a阴性对照转染到卵巢癌SKOV3细胞中,RT-qPCR检测转染后SKOV3细胞中miR-146a的表达;CCK8检测转染后miR-146a对SKOV3细胞增殖的影响;流式细胞仪检测转染后miR-146a对细胞凋亡的影响;Western blot检测SKOV3细胞p-Akt和Bcl-2的表达。结果 miR-146a在卵巢癌组织中的表达水平显著低于癌旁组织;转染miR-146a模拟物能显著提高SKOV3细胞miR-146a的表达量,显著降低SKOV3细胞的增殖能力,提高SKOV3细胞的凋亡率,抑制SKOV3细胞p-Akt和Bcl-2的蛋白表达(P0.01)。结论 miR-146a在卵巢癌癌组织低表达,转染miR-146a模拟物能抑制SKOV3细胞增殖,促进SKOV3细胞凋亡。     

MTSS1基因在膀胱癌组织中的表达及对膀胱癌细胞增殖和凋亡的影响

目的研究MTSS1基因在膀胱癌中组织的表达及其对膀胱癌EJ138细胞增殖和凋亡的影响。方法荧光定量PCR检测41例膀胱癌及相应癌旁正常组织中MTSS1基因的表达。将MTSS1基因特异性的siRNA转染EJ138细胞。转染后,Western Blot检测转染后MTSS1蛋白的表达,MTT法测定细胞生长抑制率,流式细胞法检测细胞凋亡率。结果与癌旁正常组织相比,MTSS1 mRNA在膀胱癌组织中表达明显下调。RNA干扰能够显著抑制EJ138细胞中MTSS1蛋白的表达;MTSS1基因表达降低后,EJ138细胞的生长抑制率明显降低,细胞增殖活力明显增加,而且凋亡率明显降低。结论 MTSS1基因在膀胱癌低表达,促进膀胱癌细胞增殖并抑制细胞凋亡。     

西格列汀抑制膀胱癌细胞增殖和诱导细胞凋亡

目的观察西格列汀对膀胱癌细胞增殖和凋亡的影响。方法西格列汀处理膀胱癌细胞T24及5637后,MTS检测细胞的增殖活性;Western blot检测细胞内组织蛋白酶B以及凋亡相关蛋白的表达变化。结果西格列汀显著抑制了膀胱癌细胞的增殖,经西格列汀处理后,T24及5637细胞内组织蛋白酶B的蛋白表达水平明显下降,凋亡相关蛋白PARP的剪切体表达水平升高。结论西格列汀抑制膀胱癌细胞增殖和诱导癌细胞凋亡,同时降低细胞内组织蛋白酶B的蛋白表达。     

miR-320a靶向KLF5抑制结肠癌HCT116细胞增殖和侵袭的分子机制

目的 探讨过表达miR-320a对结肠癌HCT116细胞的生物学行为的影响,并初步分析miR-320a对KLF5的调控机制.方法 将miR-320a模拟物转染结肠癌HCT116细胞,建立过表达miR-320a结肠癌HCT116细胞系,采用CCK-8方法检测转染后HCT116细胞增殖能力,Transwell实验检测转染后...     

miR-205调控YES1表达对人膀胱癌细胞增殖的影响

目的探讨miR-205对膀胱癌T24细胞增殖的影响。方法合成miR-205的模拟物并转染膀胱癌T24细胞,荧光显微镜下观察转染效率,实时荧光定量PCR法检测转染48 h后,T24细胞中miR-205的表达情况,MTT法检测转染24、48和72 h后,T24细胞的增殖情况,实时荧光定量PCR法和western blot检测转染48 h后膀胱癌细胞内源性YES1 mRNA及蛋白的表达变化。结果 miR-205的模拟物转染至T24细胞的效率为80%,转染miR-205模拟物48 h后,T24细胞内miR-205的表达水平显著升高(P0.05),T24细胞的增殖率显著低于阴性对照组(P0.05),且呈时间依赖性,YES1 mRNA及蛋白的表达水平明显低于阴性对照组(P0.05)。结论 miR-205抑制膀胱癌T24细胞增殖可能与靶向YES1基因相关。     

miR-195靶向调控PDK4表达抑制肝癌细胞增殖和促进凋亡

目的 探讨miR-195调控PDK4表达在肝癌增殖和凋亡中的作用.方法 体外培养肝癌细胞,分别转染miR-195模拟物或阴性对照质粒Nc,转染48h后,MTT检测细胞增殖,流式细胞术检测细胞凋亡,划痕实验检测迁移能力,Western blot和PCR检测PDK4表达.采用双荧光素酶实验检测miR-195与PDK4的靶向调控关系.结果 转染miR-195可明显抑制肝癌细胞内PDK4的表达,抑制肝癌细胞增殖和迁移,促进细胞凋亡.HEPG2细胞转染miR-195 mimics后,细胞增殖率和细胞迁移能力较对照组和miR-NC组显著下降(P＜0.05);细胞凋亡率较对照组和miR-NC组显著升高,PDK4 mRNA及蛋白表达水平较对照组和miR-NC组显著下降(P＜0.05).Target Scan结果提示PDK4可能是miR-195的下游靶基因,miR-195能够抑制野生型PDK4 3'UTR报告基因载体的荧光素酶活性,但是对突变型PDK4 3'UTR无明显影响.结论 上调miR-195能靶向抑制PDK4,进而对肝癌细胞起抑制增殖、迁移和促进凋亡的作用.     

miR-129-5p通过靶向Wnt5a抑制膀胱癌细胞的增殖和促进细胞凋亡

目的 检测miR-129-5p在膀胱癌组织和细胞中的表达及其对膀胱癌细胞的作用.方法 RT-qPCR法检测miR-129-5p在膀胱癌、癌旁组织以及膀胱癌细胞株中的表达.细胞中过表达miR-129-5p后,CCK-8实验检测细胞增殖能力变化;流式细胞术检测细胞凋亡情况;生物信息学网站预测miR-129-5p的靶点,并用...     

MiR-429通过CRKL靶向作用对U87胶质瘤细胞增殖和凋亡的影响

目的研究miR-429对人U87胶质瘤细胞增殖和凋亡的影响及可能机制。方法培养人U87胶质瘤细胞,应用LipofectamineLTX试剂将pre-miR-429质粒载体以及anti-miR-429质粒载体分别稳定转染人U87胶质瘤细胞;应用Real-time-PCR验证转染效率;应用CCK-8试剂盒检测miR-429对人U87胶质瘤细胞增殖能力的影响;应用Real-time PCR和Western blot检测人U87胶质瘤细胞中接头蛋白CRKL(v-crk avian sarcoma virus CT10oncogene homolog-like,CRKL)的mRNA和蛋白表达含量变化;将CRKL分别转染至U87胶质瘤细胞和miR-429过表达的U87胶质瘤细胞,应用CCK-8试剂盒检测人U87胶质瘤细胞增殖,应用流式细胞仪检测细胞凋亡的变化,应用Western blot法检测凋亡相关蛋白caspase-3和Bcl-2的蛋白表达变化。结果与对照组相比,miR-429过表达显著抑制了人U87胶质瘤细胞增殖,明显诱导了凋亡发生,显著降低了CRKLmRNA和蛋白在人U87胶质瘤细胞的表达水平,caspase-3的表达水平显著上调,Bcl-2的表达水平显著降低。CRKL过表达显著增强了人U87胶质瘤细胞增殖能力并且抑制了细胞凋亡,caspase-3的表达水平显著下调,Bcl-2的表达水平显著增强;CRKL过表达有效阻断了miR-429上调caspase-3、降低Bcl-2的作用,有效阻断了miR-429抑制U87胶质瘤细胞增殖和诱导凋亡的作用。结论 MiR-429抑制CRKL从而降低人U87胶质瘤细胞的增殖能力,诱导细胞凋亡。     

Effects of miR-489 targeting on SOX4 gene on proliferation and apoptosis of human hepatocellular carcinoma cells

BackgroundHepatocellular carcinoma is one of the most common malignant tumors found all over the globe. Despite advances in surgery and chemotherapy, the five-year survival rate of patients with hepatocellular carcinoma is still low. It is known that the proliferation of hepatocellular carcinoma cells is closely related to the occurrence, development and prognosis of hepatocellular carcinoma. The present work investigates the expression of microRNA-489 (miR-489) in human hepatocellular carcinoma cells and its effect on the biological behavior of human hepatocellular carcinoma cells.MethodsThe expression of miR-489 by fluorescence quantitative PCR detection in 30 patients with hepatoblastoma of liver cancer tissues and adjacent tissues was studied. Also, the determination of hepatoblastoma in four cell lines with different metastatic potential (HR8348, HCT116, HT29 and HEPG2) and the expression of miR-489 during miR-489 simulation process was studied. MTT assay, flow cytometry and Western blot analysis were performed to know the cell proliferation to detect the changes in cell cycle, apoptosis of cells, and SOX4 gene expression respectively.ResultsRT-PCR results showed that the cells compared with pre-cancerous tissue, the expression level of miR-489 in hepatocellular carcinoma tissues than in adjacent tissue significantly decreased (P<0.05), and with liver cancer cell metastasis increased (P<0.05); analogue transfection constructed miR-489 overexpressing HEPG2 cell line by microRNA. MTT results showed that miR-489 can inhibit the proliferation of HEPG2 cells, the differences were statistically significant (P<0.05); flow cytometry results showed that miR-489 mimics was transfected into HEPG2 cells at 48 hours had no significant effect on cell cycle distribution (P > 0.05); but miR-489 expression could induce apoptosis, compared with the control group, the apoptosis of miR-489 mimics was significantly increased and the difference was statistically significant (P < 0.05).ConclusionIn conclusion, miR-489 can significantly inhibit the occurrence and development of hepatocellular carcinoma cells. The mechanism may be down regulated by the expression of SOX4 and inhibit cell proliferation. Further this study showed that the tumor cells SOX4 gene as a regulatory factor target the genes of miR-489 in hepatocellular carcinoma.     

miR-17-5p 靶向MICB 减弱NK 细胞对肝癌细胞的毒性作用

目的:探讨miR-17-5p 在肝细胞癌(HCC)HepG2 细胞对NK 细胞介导的细胞毒性敏感性中的调控作用。方法:使用含野生型MICB 基因3忆UTR 序列、突变型MICB 基因3忆UTR 序列、miR-17-5p mimic 序列、miR-17-5p-NC 序列、anti-miR-17-5p 序列的质粒载体分别或共转染HCC HepG2 细胞,使用丙戊酸钠处理转染或未转染细胞。应用荧光素酶活性测定检测miR-17-5p 对MICB 的调控作用。应用实时荧光定量PCR 或蛋白免疫印迹检测细胞或组织中miR-17-5p 及MICB mRNA 和蛋白表达情况。结果:淤与miR-17-5p-NC 组相比,miR-17-5p-mimic 组HepG2 细胞中miR-17-5p 表达水平显著升高,MICB mRNA和蛋白表达水平均显著降低(P<0.05);与anti-miR-17-5p-NC 组相比,anti-miR-17-5p 组HepG2 细胞中miR-17-5p 表达水平均显著降低,MICB mRNA 和蛋白表达水平均显著增加(P<0’05)。与miR-17-5p-NC+MICB 3’UTR-Wt 组相比,miR-17-5p-mimic+MICB 3’-UTR-Wt 组荧光素酶活性显著降低(P<0.05)。miR-17-5p-NC+MICB 3’UTR-Mut 组与miR-17-mimic+MICB 3’-UTR-Mut组的荧光素酶活性差异无统计学意义(P>0.05)。于与对应癌旁非肿瘤组织相比,miR-17-5p 在HCC 组织中的表达水平显著增加,而MICB 蛋白表达水平显著降低(P<0.05)。miR-17-5p 和MICB 蛋白的表达与肿瘤直径、远处转移、TNM 分期、分化程度等临床病理特征有关(P<0.05)。在HCC 肿瘤组织中miR-17-5p 与MICB 蛋白表达水平呈明显负相关(P<0.05)。 与miR-17-5p-NC 组相比,miR-17-5p-mimic 组MICB 蛋白表达水平均显著降低(P<0.05)。与miR-17-5p-mimic+MICB 3’UTR-Mut组相比,miR-17-5p-mimic+MICB-3’UTR-Wt 共转染组中NK 细胞毒性和MICB 蛋白表达水平均显著增加(P 均<0.05)。与anti-miR-17-5p-NC 组相比,anti-miR-17 组NK 细胞毒性和MICB 蛋白表达水平均显著增加(P 均<0.05)。 与丙戊酸钠+miR-17-5p-NC 组相比,丙戊酸钠+miR-17-5p-mimic 组细胞中MICB 表达水平显著降低(P<0.05)。在不同效靶比时,与Ctrl 组相比,丙戊酸钠组NK 细胞毒性显著增加(P<0.05)。与丙戊酸钠+miR-17-5p-NC 组相比,丙戊酸钠+miR-17-5p-mimic 组NK 细胞毒性显著降低(P<0.05)。结论:miR-17-5p 通过靶向MICB 降低HepG2 细胞对NK 细胞介导的细胞毒性敏感性,从而抑制NK 细胞对肝癌细胞的毒性。     

miR-892a靶向调控SOX5对前列腺癌细胞增殖和迁移能力的影响

目的:探讨miR-892a对前列腺癌细胞的增殖和迁移能力的影响。方法:从癌症基因组图谱(TCGA)数据库下载499例前列腺肿瘤及52例癌旁组织的微小RNA(miRNA)的样本资料,再采用R语言的limma包及gplots包进行差异表达分析,绘制火山图和热图,筛选目的基因。采用荧光定量反转录聚合酶链式反应(RT-PCR)...     

miR-1231对结肠癌干细胞增殖、凋亡和侵袭的影响

BACKGROUND:Previous studies have found that miR-1231 is down-regulated in colon cancer stem cells (CCSCs), but the effect of miR-1231 on CCSCs remains unclear. OBJECTIVE:To explore the effect of miR-1231 on the proliferation, apoptosis and invasion of CCSCs (CD133⁺CD44⁺). METHODS: CD133⁺CD44⁺ cells and CD133^-CD44^- cells were separated from SW1116 cells by immunomagnetic bead separation. The expression level of miR-1231 in CD133⁺CD44⁺ and CD133^-CD44^- cells was detected by qRT-PCR. miR-1231-overexpressing CD133⁺CD44⁺ cells were transfected with miR-1231 mimics or miR-control by lipofection transfection. The effects of miR-1231 on CD133⁺CD44⁺ cell proliferation, apoptosis and invasion were investigated by MTT, flow cytometry and Transwell assays, respectively. In addition, the expression levels of Ki67, Bax, Bcl-2, MMP-2 and MMP-9 protein in miR-1231-overexpressing CD133+CD44+ cells and control cells were detected by western blot. RESULTS AND CONCLUSION:CD133⁺CD44⁺ and CD133^-CD44^- cells were obtained by the immunomagnetic bead separation. The expression level of miR-1231 in CD133⁺CD44⁺ cells was significantly lower than that in CD133^-CD44^- cells. miR-1231 suppressed CD133⁺CD44⁺ cell proliferation and invasion, but promoted the apoptosis in these cells. Western blot analysis showed that miR-1231-overexpressing CD133⁺CD44⁺ cells had obvious decreases in Ki67, Bcl-2, MMP-2 and MMP-9 protein expression and a significant increase in Bax protein expression compared with control cells. All these results further confirm that miR-1231 inhibits the proliferation and invasion but promotes the apoptosis in CD133⁺CD44⁺ cells. These findings suggest that miR-1231 can be a suppressor of CCSCs, which offers a novel potential therapeutic target for CCSCs and colon cancer.     

Effect of miR-340 on gastric cancer cell proliferation and apoptosis

Gastric cancer pathogenesis is a multi-factor, multi-step, complicated process that related to gene abnormal expression. This study intended to explore the miR-340 effect on human gastric cancer cell line SGC-7901 and BGG823 proliferation and apoptosis, as to provide theoretical basis and experimental evidence for potential clinical application. Array was used to screen gastric cancer related abnormal genes. Q-PCR was applied to detect the screened genes expression in tissue and gastric cancer cells. MTT and colony formation assay were performed to evaluate miR-340 impact on gastric cancer proliferation. Flow cytometry was used to determine cell cycle and cell apoptosis. Q-PCR showed that miR-340 overexpressed in gastric cancer tissue significantly compared with normal control (P < 0.01). MiR-340 overexpression can promote SGC-7901 and BGC823 cells proliferation with 50% proliferation rate. Soft agar colony formation assay also showed that miR-340 overexpression can facilitate gastric cancer cell proliferation. Cell cycle analysis revealed that miR-340 overexpression can reduce cell apoptosis. Annexin V/PI staining demonstrated that miR-340 transfection can decrease cell apoptotic rate (4.58%, 1.98%, 2.11%). MiR-340 can promote tumor cell growth and reduce cell apoptosis effectively.     

RNA干扰MEX3A基因对膀胱癌细胞增殖和凋亡的影响

目的 探讨通过慢病毒介导的RNA干扰技术抑制MEX3A基因表达对膀胱癌细胞增殖和凋亡的影响。 方法 应用GV115载体构建针对MEX3A基因的shRNA慢病毒载体,转染包装细胞293T产生慢病毒颗粒,收集并滴度测定后转染5637膀胱癌细胞,实验组转染MEX3A-shRNA慢病毒,对照组转染阴性对照慢病毒;实时定量PCR（Real-time PCR）检测MEX3A基因敲减效率;慢病毒转染3 d后,使用Celigo连续细胞计数5d检测细胞生长;慢病毒转染5d后,进行膜联蛋白V（Annexin V）染色并用流式细胞术检测细胞凋亡。 结果 成功构建MEX3A-shRNA慢病毒载体以及稳定抑制MEX3A表达的细胞株,MEX3A基因敲减效率达到74%;Celigo细胞计数检测显示,与对照组相比,实验组5637细胞的增殖速率受到显著抑制;流式细胞术检测显示,实验组发生凋亡的5637细胞显著增加。 结论 MEX3A基因促进膀胱癌细胞的增殖,抑制膀胱癌细胞的凋亡。     

miR-135a靶向调节SP1对人骨肉瘤细胞增殖和凋亡的影响

目的探讨miR-135a通过靶向调节SP1对人骨肉瘤(osteosarcoma,OS)细胞增殖和凋亡的影响。方法收集人正常成骨组织和OS组织,培养正常成骨细胞(h FOB1.19)和OS细胞(MG-63),Real-time PCR法检测miR-135a和SP1的表达,Western blot法检测SP1表达。转染miR-135a mimics和inhibitor,MTT法和Brd U-ELISA法检测OS细胞增殖变化,Western blot法检测凋亡蛋白Bax、BCL-2和Caspase 3的表达。双荧光素酶报告基因检测miR-135a与SP1的靶定关系。Western blot法检测miR-135a对OS细胞中SP1表达的影响。Western blot法检测miR-135a对OS细胞中JAK2/STAT3表达的影响。结果 OS组织和细胞中miR-135a表达均显著降低,SP1表达均显著升高。转染miR-135a mimics可降低OS细胞活性,减少Brd U阳性标记率。同时,miR-135a mimics增加OS细胞Bax和Caspase 3的表达,减少BCL-2的表达。miR-135a mimics降低荧光素酶报告基因的荧光强度,结合位点突变后荧光素酶活性升高。上调miR-135a显著降低SP1的表达并降低JAK2和STAT3的磷酸化水平。miR-135a inhibitor作用均与mimics相反。结论 miR-135a可通过靶向调节SP1抑制人OS细胞增殖,诱导OS细胞凋亡,并下调JAK2/STAT3活化。     

miR-671-5p通过靶向肿瘤坏死因子α诱导蛋白8调控胰腺癌细胞增殖和凋亡

目的：探讨miR-671-5p 靶向肿瘤坏死因子α 诱导蛋白8（ TNFAIP8）对胰腺癌细胞增殖和凋亡的影响。 方法：实时荧光定量PCR（ qRT-PCR）和免疫印迹检测20 例胰腺癌组织和与其配对的癌旁正常组织miR-617-5p、 TNFAIP8 mRNA和TNFAIP8表达水平,验证miR-671-5p 和TNFAIP8的靶向调控关系。将体外培养胰腺癌细胞 capan-1分为miR-NC组、miR-671-5p 组、si-NC 组、si-TNFAIP8 组、miR-671-5p+pcDNA组和miR-671-5p+pcDNATNFAIP8 组。采用四甲基偶氮唑蓝（ MTT）实验检测细胞活力,流式细胞术检测细胞凋亡,免疫印迹检测细胞周 期蛋白D1（ cyclin D1）、p21、B细胞淋巴瘤/ 白血病-2（ Bcl-2）和Bcl-2 相关蛋白（ Bax）的表达水平。结果：与 癌旁正常组织比较,胰腺癌组织miR-617-5p 表达量显著降低,TNFAIP8 的表达量显著升高。miR-671-5p 靶向负向 调控TNFAIP8 表达。与miR-NC组比较,miR-671-5p 组capan-1 细胞活力显著降低,细胞凋亡率显著升高,cyclin D1和Bcl-2 的表达量显著降低,p21 和Bax 的表达量显著升高;与si-NC 组比较,si-TNFAIP8 组capan-1 细胞活力 显著降低,细胞凋亡率显著升高,cyclin D1和Bcl-2 表达量显著降低,p21 和Bax 表达量显著升高;与miR-671- 5p+pcDNA 组比较,miR-671-5p+pcDNA-TNFAIP8 组capan-1 细胞活力显著升高,细胞凋亡率显著降低,cyclin D1和Bcl-2 的表达量显著升高,p21 和Bax 的表达量显著降低。结论：miR-671-5p 通过靶向下调TNFAIP8 抑制胰 腺癌细胞增殖并促进其凋亡。上调miR-671-5p 是胰腺癌潜在治疗靶点。